Alltemp Products Company Limited

Canada

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2022 April 1
2022 (YTD) 2
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IPC Class
F25B 45/00 - Arrangements for charging or discharging refrigerant 12
F21L 4/00 - Electric lighting devices with self-contained electric batteries or cells 7
C10M 171/00 - Lubricating compositions characterised by purely physical criteria, e.g. containing as base-material, thickener or additive, ingredients which are characterised exclusively by their numerically specified physical properties, i.e. containing ingredien 6
F21L 14/02 - Electric lighting devices without a self-contained power source, e.g. for mains connection capable of hand-held use, e.g. inspection lamps 5
C09K 5/04 - Materials undergoing a change of physical state when used the change of state being from liquid to vapour or vice-versa 4
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Status
Pending 3
Registered / In Force 31
Found results for  patents

1.

SYSTEMS, DEVICES, AND METHODS FOR FLUID MANAGEMENT

      
Application Number 17418171
Status Pending
Filing Date 2019-12-24
First Publication Date 2022-04-07
Owner Alltemp Products Company Limited (Canada)
Inventor
  • Appler, Paul Clarence
  • Homenuik, Jesse Richard
  • Hill, Norma

Abstract

A device comprises: a tube including a first open end portion and a second open end portion; a first mating interface positioned at the first open end portion; a second mating interface positioned at the second open end portion; a push button fitting detachably mating with the first mating interface, wherein the push button fitting includes a swivel nut, wherein the push button fitting is fluidly closed by default; and a low loss fitting detachably mating with the second mating interface, wherein the low loss fitting includes a swivel body, wherein the low loss fitting is fluidly closed by default.

IPC Classes  ?

  • F25B 45/00 - Arrangements for charging or discharging refrigerant
  • F16L 55/07 - Arrangement or mounting of devices, e.g. valves, for venting or aerating or draining

2.

SELF PIERCING CAN TAPPERS FOR FLUID MANAGEMENT

      
Application Number 17418325
Status Pending
Filing Date 2019-12-24
First Publication Date 2022-03-03
Owner Alltemp Products Company Limited (Canada)
Inventor
  • Appler, Paul Clarence
  • Homenuik, Jesse Richard
  • Hill, Norma

Abstract

A device comprises: a container; a first fitting with a stationary piercing pin coupled to the container; and a second fitting coupled to the container, wherein the first fitting is configured for coupling to and piercing a sealed fluid filled canister and the second fitting is configured for coupling to a service port of the system such that a fluid can travel from the fluid filled canister through the device into the service port of the system, wherein the system comprises at least one of an air conditioning system or a refrigeration system.

IPC Classes  ?

  • F25B 45/00 - Arrangements for charging or discharging refrigerant
  • F16L 41/04 - Tapping pipe walls, i.e. making connections through the walls of pipes while they are carrying fluids; Fittings therefor
  • F16L 55/07 - Arrangement or mounting of devices, e.g. valves, for venting or aerating or draining
  • F16L 55/164 - Devices for covering leaks in pipes or hoses, e.g. hose-menders from inside the pipe a sealing fluid being introduced in the pipe

3.

SYSTEMS, DEVICES, AND METHODS FOR FLUID MANAGEMENT

      
Application Number 17178769
Status Pending
Filing Date 2021-02-18
First Publication Date 2021-06-10
Owner Alltemp Products Company Limited (Canada)
Inventor
  • Appler, Paul Clarence
  • Homenuik, Jesse Richard
  • Hill, Norma

Abstract

A device comprises: a container; a first fitting coupled to the container; and a second fitting coupled to the container, wherein the first fitting is configured for coupling to a first service port of a system and the second fitting is configured for coupling to a second service port of the system such that a fluid can travel from the first service port to the second service port through the container while the system is running, wherein the system comprises at least one of an air conditioning system or a refrigeration system.

IPC Classes  ?

  • F25B 45/00 - Arrangements for charging or discharging refrigerant

4.

Air conditioning refrigerant oil thermal additive

      
Application Number 16925634
Grant Number 11370947
Status In Force
Filing Date 2020-07-10
First Publication Date 2020-10-29
Grant Date 2022-06-28
Owner Alltemp Products Company Limited (Canada)
Inventor
  • Appler, Paul C.
  • Homenuik, Jesse Richard
  • Cecile, Jordan Gerald Michael
  • Lister, Owen Philip

Abstract

A composition comprising an orthoester and an organosilane, and in some embodiments, a metal deactivator, antioxidant, lubricant and/or corrosion inhibitor. Also, disclosed is use of the composition for use in increasing thermal conductivity of internal fluids in air conditioning and refrigerant systems.

IPC Classes  ?

  • C09K 5/04 - Materials undergoing a change of physical state when used the change of state being from liquid to vapour or vice-versa
  • C09K 5/20 - Antifreeze additives therefor, e.g. for radiator liquids
  • C10M 171/00 - Lubricating compositions characterised by purely physical criteria, e.g. containing as base-material, thickener or additive, ingredients which are characterised exclusively by their numerically specified physical properties, i.e. containing ingredien
  • C10M 139/04 - Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing atoms of elements not provided for in groups having a silicon-to-carbon bond, e.g. silanes
  • C10M 129/16 - Ethers
  • C10N 20/00 - Specified physical properties of component of lubricating compositions
  • C10N 30/08 - Resistance to extreme temperature
  • C10N 40/30 - Refrigerator lubricant

5.

Systems, devices, and methods for fluid management

      
Application Number 16833074
Grant Number 10928111
Status In Force
Filing Date 2020-03-27
First Publication Date 2020-08-20
Grant Date 2021-02-23
Owner Alltemp Products Company Limited (Canada)
Inventor
  • Appler, Paul Clarence
  • Homenuik, Jesse Richard
  • Hill, Norma

Abstract

A device comprises: a container; a first fitting coupled to the container; and a second fitting coupled to the container, wherein the first fitting is configured for coupling to a first service port of a system and the second fitting is configured for coupling to a second service port of the system such that a fluid can travel from the first service port to the second service port through the container while the system is running, wherein the system comprises at least one of an air conditioning system or a refrigeration system.

IPC Classes  ?

  • F25B 45/00 - Arrangements for charging or discharging refrigerant

6.

Additive composition for improvement of miscibility of lubricants in air-conditioning and refrigeration systems

      
Application Number 16726161
Grant Number 11085678
Status In Force
Filing Date 2019-12-23
First Publication Date 2020-04-30
Grant Date 2021-08-10
Owner Alltemp Products Company Limited (Canada)
Inventor
  • Appler, Paul
  • Cranton, George E.
  • Hill, Norma
  • Homenuik, Jesse

Abstract

A lubricant additive for introduction into an AC/R system to improve lubricant miscibility and performance in the AC/R system.

IPC Classes  ?

  • F25B 45/00 - Arrangements for charging or discharging refrigerant
  • F25B 31/00 - Compressor arrangements
  • F25B 47/00 - Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass
  • F16N 3/04 - Oil cans; Oil syringes
  • C10M 101/02 - Petroleum fractions
  • C10M 105/06 - Well-defined hydrocarbons aromatic
  • C10M 105/38 - Esters of polyhydroxy compounds
  • C10M 129/16 - Ethers
  • C10M 133/12 - Amines, e.g. polyalkylene polyamines; Quaternary amines having amino groups bound to a carbon atom of a six-membered aromatic ring
  • C10M 171/00 - Lubricating compositions characterised by purely physical criteria, e.g. containing as base-material, thickener or additive, ingredients which are characterised exclusively by their numerically specified physical properties, i.e. containing ingredien
  • C10N 20/00 - Specified physical properties of component of lubricating compositions
  • C10N 30/06 - Oiliness; Film-strength; Anti-wear; Resistance to extreme pressure
  • C10N 30/10 - Inhibition of oxidation, e.g. anti-oxidants
  • C10N 30/12 - Inhibition of corrosion, e.g. anti-rust agents, anti-corrosives
  • C10N 30/14 - Metal deactivation
  • C10N 40/30 - Refrigerator lubricant

7.

Air conditioning refrigerant oil thermal additive

      
Application Number 16203046
Grant Number 10711172
Status In Force
Filing Date 2018-11-28
First Publication Date 2019-05-30
Grant Date 2020-07-14
Owner Alltemp Products Company Limited (Canada)
Inventor
  • Appler, Paul C.
  • Homenuik, Jesse Richard
  • Cecile, Jordan Gerald Michael
  • Lister, Owen Philip

Abstract

A composition comprising an orthoester and an organosilane, and in some embodiments, a metal deactivator, antioxidant, lubricant and/or corrosion inhibitor. Also, disclosed is use of the composition for use in increasing thermal conductivity of internal fluids in air conditioning and refrigerant systems.

IPC Classes  ?

  • C09K 5/04 - Materials undergoing a change of physical state when used the change of state being from liquid to vapour or vice-versa
  • C09K 5/20 - Antifreeze additives therefor, e.g. for radiator liquids
  • C10M 171/00 - Lubricating compositions characterised by purely physical criteria, e.g. containing as base-material, thickener or additive, ingredients which are characterised exclusively by their numerically specified physical properties, i.e. containing ingredien
  • C10M 139/04 - Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing atoms of elements not provided for in groups having a silicon-to-carbon bond, e.g. silanes
  • C10M 129/16 - Ethers

8.

Additive composition for improvement of miscibility of lubricants in air-conditioning and refrigeration systems

      
Application Number 15300650
Grant Number 10514190
Status In Force
Filing Date 2015-04-02
First Publication Date 2017-07-27
Grant Date 2019-12-24
Owner Alltemp Products Company Limited (Canada)
Inventor
  • Appler, Paul
  • Cranton, George E.
  • Hill, Norma
  • Homenuik, Jesse

Abstract

A lubricant additive for introduction into a AC/R system to improve lubricant miscibility and performance in the AC/R system.

IPC Classes  ?

  • F25B 45/00 - Arrangements for charging or discharging refrigerant
  • F16N 3/04 - Oil cans; Oil syringes
  • F25B 47/00 - Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass
  • F25B 31/00 - Compressor arrangements
  • C10M 101/02 - Petroleum fractions
  • C10M 105/06 - Well-defined hydrocarbons aromatic
  • C10M 105/38 - Esters of polyhydroxy compounds
  • C10M 129/16 - Ethers
  • C10M 133/12 - Amines, e.g. polyalkylene polyamines; Quaternary amines having amino groups bound to a carbon atom of a six-membered aromatic ring
  • C10M 171/00 - Lubricating compositions characterised by purely physical criteria, e.g. containing as base-material, thickener or additive, ingredients which are characterised exclusively by their numerically specified physical properties, i.e. containing ingredien

9.

Systems, devices, and methods for fluid management

      
Application Number 15261320
Grant Number 10605505
Status In Force
Filing Date 2016-09-09
First Publication Date 2017-03-16
Grant Date 2020-03-31
Owner Alltemp Products Company Limited (Canada)
Inventor
  • Appler, Paul Clarence
  • Homenuik, Jesse Richard
  • Hill, Norma

Abstract

A device comprises: a container; a first fitting coupled to the container; and a second fitting coupled to the container, wherein the first fitting is configured for coupling to a first service port of a system and the second fitting is configured for coupling to a second service port of the system such that a fluid can travel from the first service port to the second service port through the container while the system is running, wherein the system comprises at least one of an air conditioning system or a refrigeration system.

IPC Classes  ?

  • F25B 45/00 - Arrangements for charging or discharging refrigerant

10.

Neutralization and removal of acids in HVAC systems through the use of drying agents

      
Application Number 14782199
Grant Number 10203138
Status In Force
Filing Date 2014-04-02
First Publication Date 2016-02-11
Grant Date 2019-02-12
Owner Alltemp Products Company Limited (Canada)
Inventor
  • Appler, Paul Clarence
  • Homenuik, Jesse
  • Hill, Norma
  • Cranton, George E.

Abstract

A composition for neutralizing or removing an acid in a refrigeration or air-conditioning system, the composition comprising a) an acid neutralizer or scavenger such as a metal alkoxide, carbodiimide, glycidyl ether, epoxide, alkanolamine, arylamine, overbased metal sulphonates, or an inorganic base (e.g. KOH); and b) a hydrolytic drying agent such as an orthoester (e.g. triethylorthoformate), acetal, epoxide, or a carbodiimide, whereby the water formed by neutralization is removed from the system. Also disclosed is the use of the composition for neutralizing or removing an acid from a refrigeration or air-conditioning system; and a method for neutralizing or removing an acid from the refrigeration or air-conditioning system.

IPC Classes  ?

  • C09K 15/06 - Anti-oxidant compositions; Compositions inhibiting chemical change containing organic compounds containing oxygen
  • F25B 45/00 - Arrangements for charging or discharging refrigerant
  • C09K 5/04 - Materials undergoing a change of physical state when used the change of state being from liquid to vapour or vice-versa
  • C23F 11/04 - Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent in markedly acid liquids
  • C10M 171/00 - Lubricating compositions characterised by purely physical criteria, e.g. containing as base-material, thickener or additive, ingredients which are characterised exclusively by their numerically specified physical properties, i.e. containing ingredien
  • B65D 1/12 - Cans, casks, barrels, or drums
  • C10M 141/02 - Lubricating compositions characterised by the additive being a mixture of two or more compounds covered by more than one of the main groups , each of these compounds being essential at least one of them being an organic oxygen-containing compound
  • C23F 11/12 - Oxygen-containing compounds
  • C23F 11/18 - Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent in other liquids using inorganic inhibitors
  • F25B 47/00 - Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass

11.

Compact LED work light

      
Application Number 14313220
Grant Number 09182089
Status In Force
Filing Date 2014-06-24
First Publication Date 2014-10-16
Grant Date 2015-11-10
Owner ALLTEMP PRODUCTS COMPANY LIMITED (Canada)
Inventor
  • Whitfield, Robert Tod
  • Klipstein, Donald L.
  • Brass, Jack

Abstract

A work light having a work light body including handle section and light head section, an elongate housing, a battery compartment and a component chamber longitudinally aligned within the housing, a battery, an LED circuit board assembly extending longitudinally within the housing and having a substrate layer, an external component layer on a first side of the substrate layer, and a driving component layer on an opposing second side of the substrate layer. Overlapping portion of the LED circuit board assembly in close proximity to the battery. Also, at least one LED on the external component layer, the external component layer facing transaxially outwardly from the housing such that light emitting from the LED emits from the light head section. At least one driving component on the driving component layer, all driving components placed on an extending portion of the LED circuit board assembly over the component chamber.

IPC Classes  ?

  • F21L 4/00 - Electric lighting devices with self-contained electric batteries or cells
  • F21L 4/08 - Electric lighting devices with self-contained electric batteries or cells characterised by means for in situ recharging of the batteries or cells
  • F21L 14/02 - Electric lighting devices without a self-contained power source, e.g. for mains connection capable of hand-held use, e.g. inspection lamps
  • F21S 8/10 - specially adapted for vehicles
  • F21V 5/04 - Refractors for light sources of lens shape
  • F21V 7/00 - Reflectors for light sources
  • F21V 15/04 - Resilient mountings, e.g. shock-absorbers
  • F21V 17/12 - Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages characterised by specific fastening means or way of fastening by screwing
  • F21V 21/08 - Devices for easy attachment to a desired place
  • F21V 21/40 - Hand grips
  • F21V 23/04 - Arrangement of electric circuit elements in or on lighting devices the elements being switches
  • F21V 27/00 - Cable-stowing arrangements structurally associated with lighting devices, e.g. reels
  • F21V 29/00 - Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
  • H05B 33/08 - Circuit arrangements for operating electroluminescent light sources
  • F21V 29/75 - Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades with fins or blades having different shapes, thicknesses or spacing
  • F21V 29/76 - Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades with essentially identical parallel planar fins or blades, e.g. with comb-like cross-section
  • F21V 29/83 - Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks the elements having apertures, ducts or channels, e.g. heat radiation holes
  • F21S 4/00 - Lighting devices or systems using a string or strip of light sources
  • F21V 21/06 - Bases for movable standing lamps; Fixing standards to the bases
  • F21V 21/32 - Flexible tubes
  • F21V 23/00 - Arrangement of electric circuit elements in or on lighting devices
  • F21V 23/02 - Arrangement of electric circuit elements in or on lighting devices the elements being transformers or impedances
  • F21Y 101/02 - Miniature, e.g. light emitting diodes (LED)
  • H05K 1/02 - Printed circuits - Details

12.

Compositions and methods for injection of sealants and/or drying agents into air conditioning and refrigeration systems

      
Application Number 14186268
Grant Number 09435574
Status In Force
Filing Date 2014-02-21
First Publication Date 2014-06-19
Grant Date 2016-09-06
Owner ALLTEMP PRODUCTS COMPANY LIMITED (Canada)
Inventor
  • Appler, Paul
  • Cranton, George E.
  • Brass, Jack

Abstract

A method for maintaining a charged and pressurized air conditioning or refrigeration system, such method including introducing into the system fluid of the air conditioning or refrigeration system a hydrolytic drying agent, and distributing the hydrolytic drying agent throughout the system fluid; methods of maintaining a charged and pressurized air conditioning or refrigeration system including introducing a hydrolytic drying agent and a sealing agent; devices for maintaining a charged and pressurized air conditioning or refrigeration system which include a sealed vessel containing a hydrolytic drying agent and a sealant; kits for the same.

IPC Classes  ?

  • F25B 45/00 - Arrangements for charging or discharging refrigerant
  • B60H 1/00 - Heating, cooling or ventilating devices
  • C09K 3/12 - Materials not provided for elsewhere for stopping leaks, e.g. in radiators or in tanks
  • C10M 171/00 - Lubricating compositions characterised by purely physical criteria, e.g. containing as base-material, thickener or additive, ingredients which are characterised exclusively by their numerically specified physical properties, i.e. containing ingredien

13.

LED work light

      
Application Number 14055227
Grant Number 09464767
Status In Force
Filing Date 2013-10-16
First Publication Date 2014-02-06
Grant Date 2016-10-11
Owner ALLTEMP PRODUCTS COMPANY LIMITED (Canada)
Inventor
  • Whitfield, Robert Tod
  • Klipstein, Donald L.
  • Brass, Jack
  • Hilts, Lorne

Abstract

A light emitting diode (LED) work light and associated method of controlling the LED work light. The LED work light includes a power source, a casing including a handle section, at least one LED mounted to illuminate light from the casing, at least one lens forward of the LEDs to focus light from the LEDs, a control switch designated to at least turn on and turn off the LEDs, and a controller. The controller may be configured to, in response to activation of the control switch, provide control of the power source to the LEDs to transition from a first illumination state to a second illumination state of the illumination of the LEDs, the transition being illumination defined by a specified function over time defined to slow a transition time of the transition.

IPC Classes  ?

  • F21K 99/00 - Subject matter not provided for in other groups of this subclass
  • F21V 29/00 - Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
  • F21V 27/00 - Cable-stowing arrangements structurally associated with lighting devices, e.g. reels
  • F21L 4/00 - Electric lighting devices with self-contained electric batteries or cells
  • F21L 14/02 - Electric lighting devices without a self-contained power source, e.g. for mains connection capable of hand-held use, e.g. inspection lamps
  • F21V 5/04 - Refractors for light sources of lens shape
  • F21V 7/00 - Reflectors for light sources
  • F21V 15/04 - Resilient mountings, e.g. shock-absorbers
  • F21V 17/12 - Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages characterised by specific fastening means or way of fastening by screwing
  • F21V 21/08 - Devices for easy attachment to a desired place
  • F21V 21/40 - Hand grips
  • F21V 23/04 - Arrangement of electric circuit elements in or on lighting devices the elements being switches
  • H05B 33/08 - Circuit arrangements for operating electroluminescent light sources
  • F21V 29/75 - Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades with fins or blades having different shapes, thicknesses or spacing
  • F21V 29/76 - Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades with essentially identical parallel planar fins or blades, e.g. with comb-like cross-section
  • F21V 29/83 - Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks the elements having apertures, ducts or channels, e.g. heat radiation holes
  • F21L 4/08 - Electric lighting devices with self-contained electric batteries or cells characterised by means for in situ recharging of the batteries or cells
  • F21V 21/06 - Bases for movable standing lamps; Fixing standards to the bases
  • F21V 21/32 - Flexible tubes
  • F21V 23/02 - Arrangement of electric circuit elements in or on lighting devices the elements being transformers or impedances
  • F21Y 101/02 - Miniature, e.g. light emitting diodes (LED)

14.

Inspection port

      
Application Number 13685553
Grant Number 09228766
Status In Force
Filing Date 2012-11-26
First Publication Date 2013-04-11
Grant Date 2016-01-05
Owner ALLTEMP PRODUCTS COMPANY LIMITED (Canada)
Inventor
  • Appler, Paul C.
  • Brass, Jack E.
  • Knowles, Steven M.
  • Klipstein, Donald L.

Abstract

A manifold gauge set has at least one sight glass window for viewing contents of a refrigeration system or an air conditioning system being serviced. The window may be non-planar to achieve an appearance that varies with the presence or absence of liquid. Such a non-planar window may be in the form of a dome, prism or a fresnel lens. The gauge set may have a second light transmissive window to allow light to illuminate system contents being viewed. A light source may be provided to illuminate system contents being viewed. The light source may provide light through the same window that is used for viewing contents. A diffuser may be provided with a second window to achieve an illuminated background for viewing system contents. Similar configurations may be used in standalone sight glasses, vacuum pumps, and recovery machines.

IPC Classes  ?

  • F25B 45/00 - Arrangements for charging or discharging refrigerant
  • G01D 11/26 - Windows; Cover glasses; Sealings therefor
  • G01D 11/28 - Structurally-combined illuminating devices
  • G01L 19/16 - Dials; Mounting of dials
  • G01N 21/03 - Cuvette constructions

15.

Compact LED work light

      
Application Number 13285604
Grant Number 08789963
Status In Force
Filing Date 2011-10-31
First Publication Date 2012-08-23
Grant Date 2014-07-29
Owner ALLTEMP PRODUCTS COMPANY LIMITED (Canada)
Inventor
  • Whitfield, Robert Tod
  • Klipstein, Donald L.
  • Brass, Jack

Abstract

A work light having a work light body including handle section and light head section, an elongate housing, a battery compartment and a component chamber longitudinally aligned within the housing, a battery, an LED circuit board assembly extending longitudinally within the housing and having a substrate layer, an external component layer on a first side of the substrate layer, and a driving component layer on an opposing second side of the substrate layer. Overlapping portion of the LED circuit board assembly in close proximity to the battery. Also, at least one LED on the external component layer, the external component layer facing transaxially outwardly from the housing such that light emitting from the LED emits from the light head section. At least one driving component on the driving component layer, all driving components placed on an extending portion of the LED circuit board assembly over the component chamber.

IPC Classes  ?

  • F21L 4/02 - Electric lighting devices with self-contained electric batteries or cells characterised by provision of two or more light sources

16.

LED work light

      
Application Number 13270808
Grant Number 09297509
Status In Force
Filing Date 2011-10-11
First Publication Date 2012-05-10
Grant Date 2016-03-29
Owner ALLTEMP PRODUCTS COMPANY LIMITED (Canada)
Inventor
  • Klipstein, Donald L.
  • Whitfield, Robert Tod

Abstract

A work light has a head section with a single piece metal channel having a rear portion and opposing side flanges. The rear portion and side flanges extending longitudinally along the channel. Light has a handle section. LEDs are mounted on channel such that the channel is heatsink for the LEDs. A transparent single piece lens assembly covers the LEDs, the lens assembly has a corresponding plurality of convex lenses, each convex lens forward of each LED, the lens assembly attached to the rear portion of the channel. Forward edges of the side flanges of the channel extend farther forward from the rear surface than the lens assembly for protection.

IPC Classes  ?

  • F21L 14/02 - Electric lighting devices without a self-contained power source, e.g. for mains connection capable of hand-held use, e.g. inspection lamps
  • F21S 8/10 - specially adapted for vehicles
  • F21L 4/00 - Electric lighting devices with self-contained electric batteries or cells
  • F21V 5/04 - Refractors for light sources of lens shape
  • F21V 7/00 - Reflectors for light sources
  • F21V 15/04 - Resilient mountings, e.g. shock-absorbers
  • F21V 17/12 - Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages characterised by specific fastening means or way of fastening by screwing
  • F21V 21/08 - Devices for easy attachment to a desired place
  • F21V 21/40 - Hand grips
  • F21V 23/04 - Arrangement of electric circuit elements in or on lighting devices the elements being switches
  • F21V 27/00 - Cable-stowing arrangements structurally associated with lighting devices, e.g. reels
  • F21V 29/00 - Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
  • H05B 33/08 - Circuit arrangements for operating electroluminescent light sources
  • F21V 29/75 - Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades with fins or blades having different shapes, thicknesses or spacing
  • F21V 29/76 - Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades with essentially identical parallel planar fins or blades, e.g. with comb-like cross-section
  • F21V 29/83 - Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks the elements having apertures, ducts or channels, e.g. heat radiation holes
  • F21L 4/08 - Electric lighting devices with self-contained electric batteries or cells characterised by means for in situ recharging of the batteries or cells
  • F21S 4/00 - Lighting devices or systems using a string or strip of light sources
  • F21V 21/06 - Bases for movable standing lamps; Fixing standards to the bases
  • F21V 21/32 - Flexible tubes
  • F21V 23/02 - Arrangement of electric circuit elements in or on lighting devices the elements being transformers or impedances
  • F21Y 101/02 - Miniature, e.g. light emitting diodes (LED)

17.

LED lamp

      
Application Number 13303705
Grant Number 08376602
Status In Force
Filing Date 2011-11-23
First Publication Date 2012-03-22
Grant Date 2013-02-19
Owner ALLTEMP PRODUCTS COMPANY LIMITED (Canada)
Inventor Klipstein, Donald L.

Abstract

An LED lamp has one or more red LEDs, one or more green LEDs, and one or more white LEDs. The plurality of LEDs produces light that is mixed to produce a combined light output that has color approximating that of a blackbody radiator and having a correlated color temperature of 3,800 to 5,400 Kelvin.

IPC Classes  ?

  • F21V 9/02 - Elements for modifying spectral properties, polarisation or intensity of the light emitted, e.g. filters for simulating daylight

18.

LED lamps and LED driver circuits for the same

      
Application Number 13106316
Grant Number 08388167
Status In Force
Filing Date 2011-05-12
First Publication Date 2011-09-01
Grant Date 2013-03-05
Owner ALLTEMP PRODUCTS COMPANY LIMITED (Canada)
Inventor
  • Klipstein, Donald L.
  • Brass, Jack

Abstract

LED lamp has LEDs aimed rearwards with either a concave mirror to the rear of each LED, or one concave mirror to the rear of two or more LEDs, collecting the light from the LEDs to form a forward projecting beam. LEDs may be high power types that require heatsinking. LED lamp may have a lens forward of each LED to collimate the radiation produced by the LEDs into a beam, where at least one lens has at least one aspheric curved surface. LED lamp may have a transparent reflective optic to collimate the radiation produced by each LED into a beam. For an inspection lamp, the LEDs typically have a peak wavelength of 395 to 415 nanometers for seeing the area being irradiated but not so visible as to overwhelm fluorescence of fluorescent materials to be detected. Other wavelengths may be used. LED inspection lamp has a combination of LEDs of different wavelengths or a combination of at least one LED and at least one other light source such that the lamp produces radiation suitable for detection of materials to be detected and adequately illuminates the area being irradiated. LED lamp has LEDs that produce a beam of suitable radiation with a width of 10 degrees or less without additional optics. LED inspection lamp has head attached to a flexible member, with head serving as heatsink for one or more high power LEDs. Current regulator circuits are also disclosed.

IPC Classes  ?

  • F21L 4/00 - Electric lighting devices with self-contained electric batteries or cells

19.

LED inspection lamp and LED spotlight

      
Application Number 12503304
Grant Number 09599563
Status In Force
Filing Date 2009-07-15
First Publication Date 2010-01-14
Grant Date 2017-03-21
Owner ALLTEMP PRODUCTS COMPANY LIMITED (Canada)
Inventor
  • Brass, Jack
  • Doran, Richard J.
  • Klipstein, Donald L.
  • Lemons, Thomas M.
  • Hallgrimson, Bjarki
  • Dobbin, Sarah

Abstract

An LED inspection lamp has plurality of LED sources for emitting electromagnetic radiation at different peak wavelengths for causing visible fluorescence in different leak detection dyes. A lens is associated with each LED. Radiation passing through lenses is superimposed in target area at target distance. Another LED inspection lamp has plurality of LEDs emitting electromagnetic radiation at a peak wavelength. A lens adaptor has lens housing for attachment to LED inspection lamp with a single LED for causing visible fluorescence, and a lens. Substantially all of the radiation from the LED passes through the lens and is focused in a target area at a target distance from the lenses. LED spot lights have a similar configuration. The LEDs may produce white light from distinct LEDs or from white LEDs. The light may be a flashlight or fixed spot light.

IPC Classes  ?

  • G01N 21/64 - Fluorescence; Phosphorescence
  • G01N 21/31 - Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
  • G01N 21/88 - Investigating the presence of flaws, defects or contamination

20.

LED work light

      
Application Number 12458018
Grant Number 08033681
Status In Force
Filing Date 2009-06-29
First Publication Date 2010-01-14
Grant Date 2011-10-11
Owner ALLTEMP PRODUCTS COMPANY LIMITED (Canada)
Inventor
  • Brass, Jack
  • Klipstein, Donald L.
  • Dobbin, Sarah
  • Whitfield, Robert Tod
  • Hallgrimsson, Bjarki
  • Hilts, Lorne

Abstract

A light comprising an LED whose light intensity decreases as the angle from an axis of the LED increases, and a convex lens associated with the LED such that a beam width of the LED is concentrated by the lens into a narrower beam width, wherein the convex lens includes both a convex surface and a concave surface, and the concave surface is curved more sharply towards its edge than towards its center such that light is more evenly spread across the beam width of the lens.

IPC Classes  ?

  • F21L 14/02 - Electric lighting devices without a self-contained power source, e.g. for mains connection capable of hand-held use, e.g. inspection lamps

21.

Inspection port

      
Application Number 12299606
Grant Number 08316653
Status In Force
Filing Date 2007-05-04
First Publication Date 2009-07-23
Grant Date 2012-11-27
Owner ALLTEMP PRODUCTS COMPANY LIMITED (Canada)
Inventor
  • Appler, Paul C.
  • Brass, Jack E.
  • Knowles, Steven M.
  • Klipstein, Donald L.

Abstract

A manifold gauge set has at least one sight glass window for viewing contents of a refrigeration system or an air conditioning system being serviced. The window may be non-planar to achieve an appearance that varies with the presence or absence of liquid. Such a non-planar window may be in the form of a dome, prism, or a fresnel lens. The gauge set may have a second light transmissive window to allow light to illuminate system contents being viewed. A light source may be provided to illuminate system contents being viewed. The light source may provide light through the same window that is used for viewing contents. A diffuser may be provided with a second window to achieve an illuminated background for viewing system contents. Similar configurations may be used in standalone sight glasses, vacuum pumps, and recovery machines.

IPC Classes  ?

  • F25B 45/00 - Arrangements for charging or discharging refrigerant

22.

LED lamps and LED driver circuits for the same

      
Application Number 12371063
Grant Number 07950818
Status In Force
Filing Date 2009-02-13
First Publication Date 2009-06-25
Grant Date 2011-05-31
Owner ALLTEMP PRODUCTS COMPANY LIMITED (Canada)
Inventor
  • Klipstein, Donald L.
  • Brass, Jack

Abstract

LED lamp has LEDs aimed rearwards with either a concave mirror to the rear of each LED, or one concave mirror to the rear of two or more LEDs, collecting the light from the LEDs to form a forward projecting beam. LEDs may be high power types that require heatsinking. LED lamp may have a lens forward of each LED to collimate the radiation produced by the LEDs into a beam, where at least one lens has at least one aspheric curved surface. LED lamp may have a transparent reflective optic to collimate the radiation produced by each LED into a beam. For an inspection lamp, the LEDs typically have a peak wavelength of 395 to 415 nanometers for seeing the area being irradiated but not so visible as to overwhelm fluorescence of fluorescent materials to be detected. Other wavelengths may be used. LED inspection lamp has a combination of LEDs of different wavelengths or a combination of at least one LED and at least one other light source such that the lamp produces radiation suitable for detection of materials to be detected and adequately illuminates the area being irradiated. LED lamp has LEDs that produce a beam of suitable radiation with a width of 10 degrees or less without additional optics. LED inspection lamp has head attached to a flexible member, with head serving as heatsink for one or more high power LEDs. Current regulator circuits are also disclosed.

IPC Classes  ?

  • F21L 4/00 - Electric lighting devices with self-contained electric batteries or cells

23.

LED work light

      
Application Number 12289782
Grant Number 08562184
Status In Force
Filing Date 2008-11-04
First Publication Date 2009-06-11
Grant Date 2013-10-22
Owner ALLTEMP PRODUCTS COMPANY LIMITED (Canada)
Inventor
  • Klipstein, Donald L.
  • Brass, Jack
  • Whitfield, Robert Tod

Abstract

An LED work light has multichip LEDs and a diffusing dome. Each LED may have separate electrical terminals for each chip. The LED work light may have convex lenses forward of each LED. Convex lenses may be hemispherical. Convex lenses may have a nonhemispheric curved surface whose cross section has at least one circular arc and no non-circular arcs. The LED work light has a battery or receives power from an external power source. The LED work light may have a transparent plastic tube as a structural member. A replaceable plastic cover may be added to protect any structural tube or other major transparent part of the LED work light from abrasions. The plastic cover may be tubular. The plastic cover may comprise laminations of plastic that can be removed individually after being abraded. Any external power source may be a wall transformer type and may have current limiting means. The LEDs may be attached to the rear surface of an LED PCB that is fastened to a heatsink in a manner achieving thermal contact between the rear surfaces of the LEDs and the heatsink. A position sensing switch may be used.

IPC Classes  ?

  • F21L 4/02 - Electric lighting devices with self-contained electric batteries or cells characterised by provision of two or more light sources

24.

Liquid cartridge

      
Application Number 29230274
Grant Number D0589799
Status In Force
Filing Date 2004-06-23
First Publication Date 2009-04-07
Grant Date 2009-04-07
Owner ALLTEMP PRODUCTS COMPANY LIMITED (Canada)
Inventor Mcewan, Gregory R. W.

25.

LED lamps including LED work lights

      
Application Number 12003322
Grant Number 08066402
Status In Force
Filing Date 2007-12-21
First Publication Date 2008-09-04
Grant Date 2011-11-29
Owner ALLTEMP PRODUCTS COMPANY LIMITED (Canada)
Inventor Klipstein, Donald L.

Abstract

Work light has LEDs that may require heatsink. Desired radiation pattern achieved by using optical components designed to produce beam or LEDs may have beams in different directions. Radiation pattern of LEDs may be changed by refractive-reflective optics or by convex lenses. Convex lenses may be hemispheres, other planoconvex shapes, concavo-convex shapes, or other shapes. Curved surfaces on any lenses may be spherical or aspheric. Ballast to operate the LEDs from line voltage AC or low voltage DC. Work light may contain batteries. The work light may be mounted on a stand. May have accessory mount. May have charging station. May have a paging transmitter to activate a paging receiver in work light. May have openings for heat transfer from heatsink to ambient air external to light.

IPC Classes  ?

  • F21L 4/00 - Electric lighting devices with self-contained electric batteries or cells
  • F21L 4/04 - Electric lighting devices with self-contained electric batteries or cells characterised by provision of a light source housing portion adjustably fixed to the remainder of the device

26.

LED spotlight

      
Application Number 12003008
Grant Number 07798667
Status In Force
Filing Date 2007-12-19
First Publication Date 2008-08-21
Grant Date 2010-09-21
Owner ALLTEMP PRODUCTS COMPANY LIMITED (Canada)
Inventor Klipstein, Donald L.

Abstract

LED lamp has LEDs aimed rearwards with either a concave mirror to the rear of each LED, or one concave mirror to the rear of two or more LEDs, collecting the light from the LEDs to form a forward projecting beam. LEDs may be high power types that require heatsinking. LED lamp may have a lens forward of each LED to collimate the radiation produced by the LEDs into a beam, where at least one lens has at least one aspheric curved surface. LED lamp may have a transparent reflective optic to collimate the radiation produced by each LED into a beam. LEDs mounted to heatsink mount with spokes and ring to support LEDs in place above mirror and conduct away heat.

IPC Classes  ?

  • F21V 33/00 - Structural combinations of lighting devices with other articles, not otherwise provided for
  • F21V 7/00 - Reflectors for light sources
  • G02B 1/00 - Optical elements characterised by the material of which they are made; Optical coatings for optical elements

27.

Vacuum gauge and refrigeration system service tool, and methods of using the same

      
Application Number 11905391
Grant Number 07559245
Status In Force
Filing Date 2007-09-28
First Publication Date 2008-08-14
Grant Date 2009-07-14
Owner ALLTEMP PRODUCTS COMPANY LIMITED (Canada)
Inventor
  • Knowles, Steven M.
  • Appler, Paul
  • Brass, Jack

Abstract

A vacuum gauge has a scale having a safe zone indicia, a working zone indicia, an indicator to indicate a particular location on the scale, and a pressure sensing mechanism and housing having a pressure sensing port accessible for fluid connection to the refrigeration system to receive fluid for sensing. The indicia are distinctly coded for user differentiation. The scale may include a leak indicating zone indicia and a non-working zone indicia The safe zone indicia may represent 0 to 500 microns, the working zone indicia 500 to 2000 microns, the leak indicating zone indicia 2000 to 25,400 microns, and the non-working zone indicia 25,400 to 30,000 microns. Service tool combination includes body assembly, shaft assembly and gauge in direct sealed connection with a fitting for releasable sealed fluid connection. There are methods using the combination. Tool has gripper with cavity to receive valve core pin. Gripper has base to prevent pin from pulling gripper from tool.

IPC Classes  ?

  • G01L 7/00 - Measuring the steady or quasi-steady pressure of a fluid or a fluent solid material by mechanical or fluid pressure-sensitive elements

28.

Composition and methods for injection of sealants into air conditioning and refrigeration systems

      
Application Number 11941364
Grant Number 08065884
Status In Force
Filing Date 2007-11-16
First Publication Date 2008-03-13
Grant Date 2011-11-29
Owner ALLTEMP PRODUCTS COMPANY LIMITED (Canada)
Inventor
  • Appler, Paul
  • Cranton, George E.
  • Brass, Jack

Abstract

The use of sealants based on organosilanes for refrigeration and air conditioning systems is made possible by control of the rate of introduction and viscosity of the sealant mixture within certain ranges. An appropriate choice of organosilane sealant is made to allow effective sealing of small pinhole size leaks in the air conditioning or refrigeration system. The organosilane is then combined with a miscible lubricant at particular ratios to provide the proper mixture viscosity for injection into the refrigerant system to prevent bearing seizure. Specific orifice sizes are selected for an apparatus to ensure that the composition is injected at the flow rates required to prevent liquid slugging and subsequent compressor shutdown or failure. In addition, effective introduction of the mixture requires certain procedures be performed. Injection procedures are also described that prevent temporary or catastrophic equipment shutdown.

IPC Classes  ?

  • F25B 45/00 - Arrangements for charging or discharging refrigerant

29.

LED spotlight

      
Application Number 11627913
Grant Number 07758204
Status In Force
Filing Date 2007-01-26
First Publication Date 2007-11-01
Grant Date 2010-07-20
Owner ALLTEMP PRODUCTS COMPANY LIMITED (Canada)
Inventor
  • Klipstein, Donald L.
  • Brass, Jack
  • Whitfield, Robert Tod

Abstract

An LED spotlight is made with at least one light emitting diode and a lens placed forward of the light emitting diode to collimate the light from the light emitting diode into a beam. The light emitting diode is preferably a type with a nominal power of at least 1 watt, requiring heatsinking, and having a nominal radiation pattern width of 100 degrees or more. The lens is preferably concavo-convex. The lens can have a thickness less than the distance between the rear surface of the lens and the light emitting diode. The LED spotlight can be mounted on headwear that would be worn on a person's head. The LED spotlight can be in the form of a flashlight. The LED spotlight can be in the form of an inspection lamp suitable for causing visible fluorescence of fluorescent materials, such as leaks of fluids that have suitable fluorescent dyes.

IPC Classes  ?

  • F21L 4/04 - Electric lighting devices with self-contained electric batteries or cells characterised by provision of a light source housing portion adjustably fixed to the remainder of the device

30.

LED lamps and LED driver circuits for the same

      
Application Number 11745846
Grant Number 07490951
Status In Force
Filing Date 2007-05-08
First Publication Date 2007-09-20
Grant Date 2009-02-17
Owner ALLTEMP PRODUCTS COMPANY LIMITED (Canada)
Inventor
  • Klipstein, Donald L.
  • Brass, Jack

Abstract

LED lamp has LEDs aimed rearwards with either a concave mirror to the rear of each LED, or one concave mirror to the rear of two or more LEDs, collecting the light from the LEDs to form a forward projecting beam. LEDs may be high power types that require heatsinking. LED lamp may have a lens forward of each LED to collimate the radiation produced by the LEDs into a beam, where at least one lens has at least one aspheric curved surface. LED lamp may have a transparent reflective optic to collimate the radiation produced by each LED into a beam. For an inspection lamp, the LEDs typically have a peak wavelength of 395 to 415 nanometers for seeing the area being irradiated but not so visible as to overwhelm fluorescence of fluorescent materials to be detected. Other wavelengths may be used. LED inspection lamp has a combination of LEDs of different wavelengths or a combination of at least one LED and at least one other light source such that the lamp produces radiation suitable for detection of materials to be detected and adequately illuminates the area being irradiated. LED lamp has LEDs that produce a beam of suitable radiation with a width of 10 degrees or less without additional optics. LED inspection lamp has head attached to a flexible member, with head serving as heatsink for one or more high power LEDs. Current regulator circuits are also disclosed.

IPC Classes  ?

  • F21L 4/00 - Electric lighting devices with self-contained electric batteries or cells
  • H05B 33/00 - Electroluminescent light sources

31.

Reflectors, reflector/LED combinations, and lamps having the same

      
Application Number 11674630
Grant Number 07670030
Status In Force
Filing Date 2007-02-13
First Publication Date 2007-08-16
Grant Date 2010-03-02
Owner ALLTEMP PRODUCTS COMPANY LIMITED (Canada)
Inventor Klipstein, Donald L.

Abstract

A concave reflector can form a more uniform beam of light. The light source can be an LED with a nominally lambertian radiation pattern. LED can be high power requiring heatsink. Light reflected by reflector and light exiting without hitting reflector can form coinciding beams of essentially same size. Matching of sizes of reflected and unreflected components can be achieved in part by having a tangent at a rim parallel to axis of reflector. For some LEDs hot spot in center of beam is reduced by curvature becoming increasingly sharp when approaching along reflective curve a critical radius at which tangent to reflector curve in plane containing axis of reflector has angle near 45 degrees with respect to axis of reflector. Reflector can be used in, for example, work lights, desk lamps, accent lights, headlamps, and flashlights. Lamps can have multiple reflectors with one LED for each reflector.

IPC Classes  ?

32.

Composition and methods for injection of sealants into air conditioning and refrigeration systems

      
Application Number 10860646
Grant Number 07296423
Status In Force
Filing Date 2004-06-04
First Publication Date 2005-12-08
Grant Date 2007-11-20
Owner ALLTEMP PRODUCTS COMPANY LIMITED (Canada)
Inventor
  • Appler, Paul
  • Brass, Jack
  • Cranton, George E.

Abstract

The use of sealants based on organosilanes for refrigeration and air conditioning systems is made possible by control of the rate of introduction and viscosity of the sealant mixture within certain ranges. An appropriate choice of organosilane sealant is made to allow effective sealing of small pinhole size leaks in the air conditioning or refrigeration system. The organosilane is then combined with a miscible lubricant at particular ratios to provide the proper mixture viscosity for injection into the refrigerant system to prevent bearing seizure. Specific orifice sizes are selected for an apparatus to ensure that the composition is injected at the flow rates required to prevent liquid slugging and subsequent compressor shutdown or failure. In addition, effective introduction of the mixture requires certain procedures be performed. Injection procedures are also described that prevent temporary or catastrophic equipment shutdown.

IPC Classes  ?

  • C09K 5/04 - Materials undergoing a change of physical state when used the change of state being from liquid to vapour or vice-versa
  • F25B 43/02 - Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat for separating lubricants from the refrigerant

33.

LED work light

      
Application Number 11083086
Grant Number 07553051
Status In Force
Filing Date 2005-03-18
First Publication Date 2005-12-01
Grant Date 2009-06-30
Owner ALLTEMP PRODUCTS COMPANY LIMITED (Canada)
Inventor
  • Brass, Jack
  • Klipstein, Donald L.
  • Dobbin, Sarah
  • Whitfield, Robert Tod
  • Hallgrimsson, Bjarki
  • Hilts, Lorne

Abstract

Work light has LEDs that require heatsink. Desired radiation pattern achieved by using optical components designed to produce beam or LEDs may have beams in different directions. Radiation pattern of LEDs may be changed by refractive-reflective optics or by convex lenses. Convex lenses may be hemispheres, other planoconvex shapes, concavo-convex shapes, or other shapes. Curved surfaces on any lenses may be spherical or aspheric. Ballast to operate the LEDs from line voltage AC or low voltage DC. Work light may contain batteries. The work light may be mounted on a stand. May have accessory mount. May have charging station. May have a paging transmitter to activate a paging receiver in work light. May have openings for heat transfer from heatsink to ambient air external to light.

IPC Classes  ?

  • F21L 14/02 - Electric lighting devices without a self-contained power source, e.g. for mains connection capable of hand-held use, e.g. inspection lamps

34.

LED lamps and LED driver circuits for the same

      
Application Number 10885031
Grant Number 07214952
Status In Force
Filing Date 2004-07-07
First Publication Date 2005-01-13
Grant Date 2007-05-08
Owner ALLTEMP PRODUCTS COMPANY LIMITED (Canada)
Inventor
  • Klipstein, Donald J.
  • Brass, Jack

Abstract

LED lamp has LEDs aimed rearwards with either a concave mirror to the rear of each LED, or one concave mirror to the rear of two or more LEDs, collecting the light from the LEDs to form a forward projecting beam. LEDs may be high power types that require heatsinking. LED lamp may have a lens forward of each LED to collimate the radiation produced by the LEDs into a beam, where at least one lens has at least one aspheric curved surface. LED lamp may have a transparent reflective optic to collimate the radiation produced by each LED into a beam. For an inspection lamp, the LEDs typically have a peak wavelength of 395 to 415 naometers for seeing the area being irradiated but not so visible as to overwhelm fluorescence of fluorescent materials to be detected. Other wavelengths may be used. LED inspection lamp has a combination of LEDs of different wavelengths or a combination of at least one LED and at least one other light source such that the lamp produces radiation suitable for detection of materials to be detected and adequately illuminates the area being irradiated. LED lamp has LEDs that produce a beam of suitable radiation with a width of 10 degrees or less without additional optics. LED inspection lamp has head attached to a flexible member, with head serving as heatsink for one or more high power LEDs. Current regulator circuits are also disclosed.

IPC Classes  ?

  • H05B 33/00 - Electroluminescent light sources
  • G01N 21/33 - Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using ultra-violet light