A handheld work apparatus comprises an internal combustion engine (A8) and an exhaust silencer (A23). A first silencer compartment (A47) and a second silencer compartment (A48) are formed in the exhaust silencer (A23). The exhaust silencer (A23) comprises an exhaust gas aftertreatment device (A26) which comprises at least one throughflow unit (A31). The throughflow unit (A31) is arranged in a flow path from the first silencer compartment (A47) into the second silencer compartment (A48). In the region of the throughflow unit (A31) through which exhaust gas flows, the thickness (b) of the throughflow unit (A31), as measured from an upstream end side (A36) to a downstream end side (A37) of the throughflow unit (A31), is at least 10 mm at least over 70% of the cross section. The exhaust gas aftertreatment device (A26) does not have a catalytically acting coating.
F01N 1/08 - Silencing apparatus characterised by method of silencing by reducing exhaust energy by throttling or whirling
F01N 3/022 - Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters characterised by specially adapted filtering structure, e.g. honeycomb, mesh or fibrous
The invention relates to a wood cutter, comprising a housing (2) and a drive motor (3). The drive motor (3) drives a saw chain (5), which is guided in a guide groove of a guide rail (4), via a drive chain sprocket. A securing section (14) is provided on the rear end (7) of the housing (2) for receiving a first rechargeable battery pack (21) for supplying electric energy to the drive motor (3), wherein the securing section (14) is designed to receive a second rechargeable battery pack (22), and the securing section (14) is arranged on the housing (2), in particular at least on the first handle (9), such that the center of gravity (S1) of the wood cutter (1) lies in the first handle (9) when the wood cutter (1) is in a state in which the first rechargeable battery pack (21) and the second rechargeable battery pack (22) are arranged on the securing section (14).
The invention relates to a guide bar (10) for the saw chain (4) of a motorized chainsaw (1), wherein the saw chain (4) consists of chain links which are connected to one another in an articulated manner and which are partly formed as drive links (20). At its free end, the guide bar (10) has a redirection portion (12) with outer circumferential edges. Between the circumferential edges there is formed a guide groove (23) for engagement by the drive links (20) of the saw chain (4). To reduce transverse forces acting on the side walls of the guide groove (23), the invention provides for the material thickness (D) to be reduced by means of a groove (30) in at least one lateral surface (19) of the guide bar (10) near the redirection portion (12). The groove (30) extends over at least one longitudinal section along the circumferential edges of the redirection portion (12).
The invention relates to an accumulator pack (1), the accumulator pack (1) comprising: - a plurality of pack power contacts (2a, 2b), the pack power contacts (2a, 2b) having touch points (2aB, 2bB) for the user-releasable touching of tool power contacts (3a, 3b) of an electrically powered tool (4) for supplying the tool (4) with electric drive power (AL) from the accumulator pack (1), and - a pack housing (5), the pack housing (5) having at least one flame-retardant housing component (6) and at least one impact-protection housing component (7), - wherein the at least one flame-retardant housing component (6) has at least one flame-retardant material (6M) acting as a flame retardant for the accumulator pack (1), - wherein the at least one impact-protection housing component (7) has at least one impact-protection material (7M) that differs from the flame-retardant material (6M) for providing impact protection for the accumulator pack (1), and - wherein the touch points (2aB, 2bB) are located in the region of the at least one flame-retardant housing component (6) and not in the region of the at least one impact-protection housing component (7).
H01M 50/213 - Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for cells having curved cross-section, e.g. round or elliptic
H01M 50/242 - Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by physical properties of casings or racks, e.g. dimensions adapted for protecting batteries against vibrations, collision impact or swelling
H01M 50/247 - Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders specially adapted for portable devices, e.g. mobile phones, computers, hand tools or pacemakers
5.
A POLYMER AND A PRODUCT OR ARTICLE COMPRISING OR CONSISTING OF THE POLYMER
The invention relates to a polymer having a backbone chain, wherein the backbone chain comprises linear amide linkages and nitrogen atom containing heteromonocyclic moieties, wherein the backbone chain is free of peptide linkages or wherein the backbone chain has a proportion of peptide linkages of maximum 30 %, based on the total number of the linear amide linkages of the backbone chain, and wherein the nitrogen atom containing heteromonocyclic moieties have a proportion of 5 % by weight to 25 % by weight, based on the total weight of the polymer. The invention further relates to a product or article and the use of the polymer for manufacturing or producing the product or article.
C08G 69/26 - Polyamides derived from amino carboxylic acids or from polyamines and polycarboxylic acids derived from polyamines and polycarboxylic acids
C08G 69/36 - Polyamides derived from amino carboxylic acids or from polyamines and polycarboxylic acids derived from amino acids, polyamines, and polycarboxylic acids
A01D 34/00 - Mowers; Mowing apparatus of harvesters
7.
LAWN CARE SYSTEM, METHOD FOR SENSING AT LEAST ONE SECTION OF A DELIMITING EDGE OF AN AREA TO BE CARED FOR, AND METHOD FOR OPERATING AN AUTONOMOUS MOBILE LAWN CARE ROBOT
The invention relates to a lawn care system, to a method for sensing at least one section of a delimiting edge of an area to be cared for by means of a lawn care system, in particular such a lawn care system, and to a method for operating an autonomous mobile lawn care robot of a lawn care system, in particular of such a lawn care system, on such an area to be cared for having such a delimiting edge.
The invention relates to an electromagnetic valve having a valve housing (2) and a valve opening (29) with a valve seat (8) and an electric drive coil (3) and a magnetic yoke (11) and a longitudinal centre axis (14). The magnetic yoke (11) is assigned a metallic plate armature (5) which is mounted movably and has an armature disc (48). The armature disc (48) lies sealingly with a sealing surface (9) against the valve seat (8) in a first switching position of the valve, and opens the valve seat (8) in a second switching position of the valve. According to the invention, the valve seat (8) is configured on a valve component (18), wherein the valve component (18) has at least one valve opening (29) which lies at a radial spacing (r) from the longitudinal centre axis (14). The valve seat (8) of the valve opening (29), which valve seat (8) corresponds with direct body contact with the sealing surface (9) of the armature disc (48) of the plate armature (7), consists of metal.
A motorized chain saw (1) has a measuring system (3) for measuring an object, in particular a trunk (26). The motorized chain saw (1) has a saw chain (2), and the measuring system (3) has an evaluation device. The measuring system (3) comprises a sensor system (7) for capturing the movement (6) of the saw chain (2) as the saw chain (2) rolls over an object to be measured. The evaluation device is configured to evaluate the movement (6) of the saw chain (2) captured by the sensor system (7). In a method for operating the motorized chain saw (1), the sensor system (7) captures the movement (6) of the saw chain (2) as the saw chain (2) rolls over an object to be measured, and the evaluation device evaluates the captured movement (6).
Disclosed is a two-stroke engine (1) having a cylinder (2) in which a piston (5) is mounted such that it reciprocates in the direction of a cylinder longitudinal axis (17). The two-stroke engine (1) has a combustion chamber (3) which is connected to a crankcase interior (16) via at least one overflow channel (11, 12) in at least one position of the piston (5). At least one side wall (26) of the overflow channel (11, 12) runs at an angle to the cylinder longitudinal axis (17), when viewed from the side of the two-stroke engine (1), and forms an undercut in the direction of the crankcase (4). At least a section of the first side wall (26) is formed on an insert that protrudes into the cylinder (2), the lower edge (43, 44) of the overflow window (11, 12) also being formed on the insert. The insert (27) protrudes in a circumferential direction between cylinder sections (29, 30, 31) formed on the cylinder (2), the cylinder running surface (40) being formed on said sections. The insert (27) is formed on a crankcase component that delimits the crankcase (4). A separating rib (42) formed on the cylinder (2) runs between two overflow windows (11, 12), which rib extends in the bottom dead centre of the piston (5) to at least the position of the first piston ring (71) of the piston (5).
F02F 1/22 - Other cylinders characterised by having ports in cylinder wall for scavenging or charging
F02B 33/04 - Engines with reciprocating-piston pumps; Engines with crankcase pumps with simple crankcase pumps, i.e. with the rear face of a non-stepped working piston acting as sole pumping member in co-operation with the crankcase
F02B 33/16 - Engines with reciprocating-piston pumps; Engines with crankcase pumps with reciprocating-piston pumps other than simple crankcase pumps with the pumping cylinder situated between working cylinder and crankcase, or with the pumping cylinder surrounding working cylinder working and pumping pistons having differing movements
The invention relates to a work device with a guide rail (4) on which a chain (5) is driven in a circulating manner. The work device has a clamping device (15) for the chain (5). The clamping device (15) has a clamping element (16) which acts on the guide rail (4) in the direction (19) of the longitudinal central axis (18) of the guide rail (4). The clamping device (15) has a rotatably mounted adjusting element (17) which is connected to the clamping element (16) via a threaded connection (20). A rotation of the adjusting element (17) about its rotational axis (21) causes a movement of the clamping element (16) in the direction (19) of the longitudinal central axis (18) of the guide rail (4). The outer circumference of the adjusting element (17) has a threaded portion (22) with at least one turn (23), said threaded portion being provided for engaging with at least one threaded portion (24) of the clamping element (16). The adjusting element (17) has an actuating contour (39) so that a user can rotate the adjusting element (17), said actuating contour comprising at least one depression. The largest spacing (b) between the threaded portion (22) of the adjusting element (17) and the rotational axis (21) is at least as large as the largest spacing (a) between the actuating contour (39) and the rotational axis (21).
The invention relates to a hand-held implement having a drive motor (14) which drives a tool (4) in rotation by means of a belt drive (70). The belt drive (70) has at least one first, driving belt pulley (27) and at least one second, driven belt pulley (28). A second belt pulley (28) is non-rotatably connected to the tool (4). The rotational speed of the second belt pulley (28) in operation is less than the rotational speed of the first belt pulley (27). The implement has a braking device (25) which acts on the belt drive (70). At least one first drive belt (31) of a first drive stage and a second drive belt (32) of a second drive stage act between the first belt pulley (27) and the second belt pulley (28) for transmission of the driving torque. The first drive belt (31) and the second drive belt (32) each effect a reduction in the rotational speed. The belt drive (70) comprises at least one deflecting roller (35, 36) which bears against at least one drive belt (32). In this way braking of the tool (4) is made possible regardless of the rotational speed of the tool.
B23D 47/12 - Sawing machines or sawing devices working with circular saw blades, characterised only by constructional features of particular parts of drives for circular saw blades
B27B 5/38 - Devices for braking the circular saw blade or the saw spindle; Devices for damping vibrations of the circular saw blade, e.g. silencing
B25F 5/00 - COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR - Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for
The invention relates to a handheld tool which has a drive motor (14), which rotationally drives an implement (4) by means of a belt drive (70). The belt drive (70) has at least one first, driving pulley (27) and at least one second, driven pulley (28). At least one drive belt (31, 32) acts between the first pulley (27) and the second pulley (28) in order to transmit the drive torque. A second pulley (28) is connected to the implement (4) in a rotationally fixed manner. During operation, the rotational speed of the second pulley (28) is less than the rotational speed of the first pulley (27). The tool has a braking device (25), which acts on the first pulley (27). The belt drive (70) comprises at least one deflecting roller (35, 36). In the event of braking, at least one deflecting roller (35, 36) lies against the load run (66, 68) of each drive belt (31, 32) that acts between the first pulley (27) and the second pulley (28). A simple design and secure breaking of the implement (4) are thereby enabled.
B23D 47/12 - Sawing machines or sawing devices working with circular saw blades, characterised only by constructional features of particular parts of drives for circular saw blades
B27B 5/38 - Devices for braking the circular saw blade or the saw spindle; Devices for damping vibrations of the circular saw blade, e.g. silencing
B25F 5/00 - COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR - Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for
The invention relates to a device for cleaning paved surfaces, comprising a brush (2) that can be put in motion by a drive unit (1) and comprising a handle (3), characterized in that the device comprises a front carriage (5) that is equipped with at least one wheel (4, 64) and that is fastened to the device so as to be pivotable about a horizontal rotational axis (6).
The invention relates to a method and a device for measuring cell voltages of accumulator cells (Z1,...Z10) in a plurality of series-connected accumulator cells especially of a so-called battery pack or cell pack (100), as for example described for Li-Ion cell packs, the pack comprising a plurality of such series-connected accumulator cells. The method and the device are especially characterized in that no unbalancing of the battery pack is caused by the measurements of the cell voltages on the individual accumulator cells.
G01R 31/36 - Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
16.
ENERGY STORAGE UNIT, TOOL, CHARGING DEVICE, AND WORKING KIT FOR LANDSCAPE DESIGNING
The invention relates to an energy storage unit (16) for an electrically driven tool (12), especially for landscaping, forestry, and horticulture. Said energy storage unit (16) comprises a housing (36) having a longitudinal axis, at least one energy storage cell (44) located inside the housing (36), and an interface unit (30) which is mounted on the housing (36) and allows the energy storage unit (16) to be connected to the tool (12). In the longitudinal direction, the housing (36) is subdivided into a first zone (40) for receiving the energy storage cell/s (44) and a second zone (42) for receiving an electronic unit (46).
The invention relates to a protective headgear combination (1) comprising a helmet (2) and at least one set of ear defenders (20), which are fixed to the helmet (2). To achieve excellent soundproofing and to allow the position of the ear defenders (20) to be easily adjusted on the head of the wearer (38), the rotational position of the ear defenders (20) can be shifted in relation to the helmet (2) about a first rotational axis (30), said axis running at an angle (α) of less than 45° to the vertical (37) when the head of the wearer (38) of the headgear combination (1) is held upright.
patents
