Abstract

[Problem] To provide a golf glove having a good wearing feeling. [Solution] A back member of a golf glove comprises a main part 10. The main part 10 comprises a base layer 34 and a constraint layer 36. The base layer 34 extends over the whole main part 10. The base layer 34 is formed of tricot. The constraint layer 36 is laminated on the base layer 34 and bonded to the base layer 34. The constraint layer 36 partly covers the base layer 34. In the main part 10, an area wherein the base layer 34 is covered with the constraint layer 36 and an area wherein the base layer 34 is not covered with the constraint layer 36 coexist. The constraint layer 36 is formed of a resin film. The constraint layer 36 is less stretchable than the base layer 34 and, therefore, the constraint layer 36 can constrain the extension of the base layer 34.

IPC Classes  ?

• A63B 71/14 - Body-protectors for players or sportsmen for the hands, e.g. baseball, boxing, or golfing gloves
• A41D 19/00 - Gloves
• A41D 19/015 - Protective gloves

Abstract

[Problem] To provide a golf ball having exceptional flying distance, approach performance, and hitting sensation. [Solution] This ball (2) is provided with a core (4), a middle layer (6), and a cover (8). The core (4) has an inner core (10) and an outer core (12). The cover (8) has an inner layer cover (10) and an outer layer cover (12). The inner core volume (Vc), the middle layer volume (Vm), the middle layer hardness (Hm), the inner cover volume (Vinc), the inner cover hardness (Hinc), the outer cover volume (Vouc), the outer cover hardness (Houc), and the ball volume (V) satisfy the following relational expressions (a) to (g). (a) Vc/V ឬ 0.07, (b) Hm ᡶ Hinc ᡶ Houc, (c) Hm – Houc ᡶ 25, (d) Vm ᡶ Vinc ᡶ Vouc, (e) (Vm + Vinc + Vouc)/V ឬ 0.30, (f) Vm/Vouc ᡶ 1.50, (g) (Vm • Hm)/(Vouc • Houc) ᡶ 3.0

IPC Classes  ?

• A63B 37/00 - Solid balls; Marbles

Abstract

　Provided is a golf club in which the rotation position of an adapter can be seen without disassembling a structure via which a shaft and a golf club head are connected. The golf club is provided with: a shaft; a golf club head having a hosel part; a first adapter accommodated in the interior space of the hosel part from an attachment hole in the hosel part via which the shaft is attached; a second adapter in which a through-hole through which the first adapter passes is formed, at least a part of the second adapter being disposed externally with respect to the attachment hole; and a securing member for detachably securing the first adapter in the interior space of the hosel part. The shaft is connected so as to be inclined in relation to the first adapter, the first adapter being connected so as to be inclined in relation to the second adapter; and the first adapter and the second adapter are connected so as to be capable of rotating about an axis.

IPC Classes  ?

• A63B 53/02 - Joint structures between the head and the shaft

Abstract

[Problem] To provide a golf ball exhibiting high carry performance, excellent approach performance, and an excellent stroke sensation. [Solution] A golf ball is provided with a spherical core, an intermediate layer, an inner-layer cover, and an outer-layer cover. The hardness (Hm) of the intermediate layer is greater than the hardness (Hinc) of the inner-layer cover. The hardness (Hinc) of the inner-layer cover is greater than the hardness (Houc) of the outer-layer cover. The difference (Hm-Houc) between the hardness of the intermediate layer and the hardness of the outer-layer cover is greater than 25. The volume (Vm) of the intermediate layer is greater than the volume (Vinc) of the inner-layer cover. The volume (Vinc) of the inner-layer cover is greater than the volume (Vouc) of the outer-layer cover. The ratio [(Vm+Vinc+Vouc)/V] of the sum (Vm+Vinc+Vouc) of the volumes of the intermediate layer, the inner-layer cover, and the outer-layer cover, to the volume (V) of the entire golf ball is less than 0.30. The ratio (Vm/Vouc) of the volume of the intermediate layer to the volume of the outer-layer cover is greater than 1.50. The product (Vm∙Hm) of the volume and hardness of the intermediate layer, and the product (Vouc∙Houc) of the volume and hardness of the outer-layer cover satisfy the relationship [(Vm∙Hm)/(Vouc∙Houc)] > 3.0.

IPC Classes  ?

• A63B 37/00 - Solid balls; Marbles

Abstract

In a golf club related to one aspect of the present invention, by coupling a first connecting portion of a first adapter, which is secured to a shaft, with a hosel first connecting portion of a golf club head so as to be non-rotatable about an axis thereof, the shaft is attached to the golf club head so as to be incapable of rotation about the axis. As a result, the second adapter coupled to the first adapter at least need not be configured to be non-rotatable about the axis, and therefore, it is possible to increase the degree of freedom of design for the adapters.

IPC Classes  ?

• A63B 53/02 - Joint structures between the head and the shaft

Abstract

This golf club is provided with a shaft, a golf club head, a first adapter, a second adapter, and a securing member which secures the first adapter to an internal space within a hosel part. In addition, the shaft is configured to be coupled to be inclined with respect to a connecting portion of the first adapter, and the first adapter is configured to be coupled to be inclined with respect to the second adapter.

IPC Classes  ?

• A63B 53/02 - Joint structures between the head and the shaft
• A63B 53/04 - Heads

Abstract

[Problem] To provide a golf clubhead for an iron and a golf club set that can reduce resistance with respect to the ground and increase the amount of backspin. [Solution] The present invention is a golf clubhead for an iron having a top face, a sole, a toe that connects therebetween, and a face that strikes a ball, wherein the sole comprises, with a visible boundary line extending in the toe-heel direction as the apex, a leading face that is inclined to the face side in the face-back direction, and a trailing face that is inclined to the back side.

IPC Classes  ?

• A63B 53/04 - Heads
• A63B 53/00 - Golf clubs

Abstract

[Problem] To provide a method for storing hollow balls easily and inexpensively. [Solution] This hollow ball storage method comprises: (1) a step for placing hollow balls (4), which have an outer shell and a space covered by said outer shell, in a holding section (6); (2) a step for reducing the temperature of the hollow balls (4) below the external air temperature; and (3) a step for storing the hollow balls with the temperature of the hollow balls (4) reduced below the external air temperature. Preferably, the storage method also comprises (4) a step for increasing the temperature of the hollow balls (4) after Step (3). Preferably, in step (4), the temperature of the hollow balls (4) is increased to a temperature exceeding the dew point of the external air.

IPC Classes  ?

• A63B 47/00 - Devices for handling or treating balls

Abstract

Provided is a golf club shaft having excellent strength. This golf club shaft is made of a fiber-reinforced epoxy resin material including a cured product of an epoxy resin composition and reinforcing fibers. The epoxy resin composition includes, as epoxy resin components: at least one type of resin selected from the group consisting of bisphenol A-type epoxy resins, bisphenol F-type epoxy resins, and novolac-type epoxy resins; and a tetraglycidyl-type epoxy resin. The cured product of the epoxy resin composition has a swelling rate by methylethyl ketone of from 20 mass% to 44 mass%.

IPC Classes  ?

• A63B 53/10 - Non-metallic shafts

Abstract

[Problem] To provide a method for increasing internal pressure of a hollow ball easily in a practical time. [Solution] This method for increasing the internal pressure of a hollow ball comprises: (1) a step for putting, in a housing part (4), a hollow ball (18) having an outer shell and a space covered with the outer shell; (2) a step for filling, into the housing part (4), gas having more excellent permeability to the outer shell than the permeabilities of oxygen gas and nitrogen gas to the outer shell; and (3) a step for causing the gas to permeate the outer shell. When the outer shell contains natural rubber, preferably, gas of which the permeation coefficient to the natural rubber at 25°C is 20×10-17 m4/(N∙s) or more is filled into the housing part in the above step (2). More preferably, carbon dioxide gas is filled into the housing part in the above step (2).

IPC Classes  ?

• A63B 39/02 - Arrangements for maintaining the pressure
• A63B 47/00 - Devices for handling or treating balls

Abstract

[Problem] To provide a golf club in which a shaft is detachably attached to a head, and which has excellent reliability. [Solution] This golf club (2) is provided with a head (4), a shaft (6), a sleeve (8) and a screw (10). The sleeve (8) is fixed to the end part of the shaft (6). The head (4) has a head main body (18) and an engagement member (20). The engagement member (20) is fixed to the head main body (18). On the basis of the engagement of the sleeve (8) with the engagement member (20), rotation of the sleeve (8) in the head (4) is regulated. On the basis of the connection between the sleeve (8) and the screw (10), the falling out of the sleeve (8) from the head (4) is regulated. The screw (10) is a multiple-thread screw.

IPC Classes  ?

• A63B 53/02 - Joint structures between the head and the shaft
• A63B 53/06 - Heads adjustable

Abstract

(Problem) To provide a golf club head having a recessed part and allowing a high degree of design freedom. (Solution) A head (4) is provided with a head main body (m1) and a recessed part-forming member (b1). The head main body (m1) has an opening (hs1) for a recessed part, and a receiving part (x1) with at least a part thereof formed around the opening (hs1) for a recessed part. The recessed part-forming member (b1) is fixed to the opening (hs1) for a recessed part. A recessed part (R) is formed on the head outer face by the recessed part-forming member (b1). The recessed part-forming member (b1) is formed separately from the head main body (m1). The recessed part-forming member (b1) has an outward extending part (y1). The outward extending part (y1) is supported by the receiving part (x1). The head (4) is hollow.

IPC Classes  ?

• A63B 53/04 - Heads
• A63B 53/06 - Heads adjustable

Abstract

A golf club head (10) includes a heel portion (12), a toe portion (14), a hosel (52), and a striking face (16). The striking face includes a plurality of scorelines (18) each having an average depth no less than about 0.10 mm, a plurality of micro-grooves (20) each having an average depth no greater than about 0.010 mm, and a plurality of textured surface treatment regions (22) superimposed on the micro- grooves so as to at least partially intersect the micro-grooves.

IPC Classes  ?

• B23K 26/36 - Removing material

Abstract

[Problem] To provide a golf club head that is highly adaptable to changes in lie, and has good sliding of the sole [Solution] A sole surface (f8) of a head (2) has a first sole region (R1). An outer edge of the region (R1) has a first edge line (Eg1), a second edge line (Eg2), a third edge line (Eg3), and a fourth edge line (Eg4). The line (Eg1) is inclined so as to be closer to a face surface as the line goes toward a tow side. The line (Eg2) is inclined so as to be closer to the face surface as the line goes toward a heel side. The line (Eg3) is inclined so as to be closer to the face surface as the line goes toward the heel side. The line (Eg4) is inclined so as to be closer to the face surface as the line goes toward the tow-side. The lines from (Eg1) to (Eg4) are linked together, thus forming a single line.

IPC Classes  ?

• A63B 53/04 - Heads

Abstract

Provided is a golf club head which produces an improved hitting sound obtained without impairing the appearance of the sole section. A golf club head having a hollow section (i) formed therein has a sole section (5) which forms the bottom surface of the head. The sole section (5) includes a thin-walled section (8) and a thick-walled section (9) which has a greater thickness than the thin-walled section (8). The golf club head is characterized in that a portion of the inner surface of the thick-walled section (9), the portion facing the hollow section, has a rib (10) secured to the portion by welding.

IPC Classes  ?

• A63B 53/04 - Heads

Abstract

Provided is an iron type golf club head equipped with an undercut cavity. An iron type golf club head has a face section (2) for hitting a ball. A flange section (7) which rises toward the rear of the head is provided at the peripheral edge (2e) of the face section (2). A cavity (C) which is surrounded by the flange section (7) is formed in the rear face (5) of the face section (2). The flange section (7) includes a first flange section (8). The first flange section (8) has a first recess (10) on the inner peripheral surface (8i) side thereof, the inner peripheral surface (8i) facing the cavity (C), and the first recess (10) forms an undercut cavity (C2) which is recessed toward the outside of the head and which extends along the peripheral edge (2e). A lateral cross-section of the first recess (10) has a front wall surface (11) which is located at the front of the head, a rear wall surface (12) which is located at the rear of the head, and a bottom surface (13) which smoothly connects the front wall surface (11) and the rear wall surface (12), and the lateral cross-section is tapered toward the bottom surface (13). The angle (θ1) between the front wall surface (11) and the rear wall surface (12) is greater than or equal to 10 degrees and less than 30 degrees. The bottom surface (13) is formed from a circular arc having a curvature radius (R1) greater than or equal to 1 mm and less than 2 mm.

IPC Classes  ?

• A63B 53/04 - Heads

Abstract

The purpose of the present invention is to provide a novel fiber-reinforced epoxy resin material having improved strength. This fiber-reinforced epoxy resin material is a fiber-reinforced epoxy resin material containing a cured epoxy resin composition and reinforcing fibers, the epoxy resin composition containing novolak-type epoxy resin as an epoxy resin component, and the cured epoxy resin composition having a swelling ratio by methyl ethyl ketone of 20-44 mass%.

IPC Classes  ?

• C08J 5/04 - Reinforcing macromolecular compounds with loose or coherent fibrous material
• C08G 59/20 - Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups characterised by the epoxy compounds used

Abstract

[Problem] To provide a gold club head with excellent striking sound and flight distance performance. [Solution] This head (2) is provided with a face (4), a crown (6) and a sole (8). Grid-form ribs are provided on the inner surface of the crown (6). Defining the region where the grid-form ribs are provided as the rib region (R1), additional ribs (rb3) are further provided in the rib region (R1). The additional ribs are positioned on the heel side of the face center. Preferably, the grid-form ribs are formed by the intersection of first ribs (rb1) extending in approximately the toe-heel direction, and second ribs (rb2) extending in approximately the face-back direction. Preferably, the additional ribs (rb3) slope towards the back towards the heel side.

IPC Classes  ?

• A63B 53/04 - Heads

Abstract

A wood golf club head (1), which is provided therein with a hollow section (i) and for which a crown section (4) that forms the upper surface of the head is formed from a metal material. The crown section (4) comprises: a heel portion (4a); a toe portion (4b) with a smaller thickness than the heel portion (4a); and a thickness transition section (4c) provided between the heel portion (4a) and the toe portion (4b), the thickness of which decreases gradually from the heel portion (4a) to the toe portion (4b). In the top view of a reference state in which the head (1) is placed on a horizontal plane (HP) with a specified lie angle and loft angle, the thickness transition section (4c) extends as a smooth curve that protrudes towards the toe (T) side.

IPC Classes  ?

• A63B 53/04 - Heads

Abstract

[Problem] To provide a golf club swing analysis method, swing analysis system, and swing analysis program capable of easily calculating the positions of markers on a club head and analyzing a swing when the swing is analyzed from images taken with a single camera. [Solution] This swing analysis method is provided with: a step for preparing a golf club that has a head; a step for installing multiple markers on the head; a step for acquiring multiple basic head images by filming the head in multiple orientations with a single camera; a step for calculating, as basic marker position information, the position of each marker in a head coordinate system that uses the golf club head as a reference on the basis of the multiple basic head images; a step for acquiring a single analysis head image by filming a swing of the golf cub at a specified time using the camera; and a step for calculating the position and/or the orientation of the golf club head at the specified time in the object space from the positions of the multiple markers in the single analysis head image.

IPC Classes  ?

• A63B 69/36 - Training appliances or apparatus for special sports for golf

Abstract

[Problem] To provide a light-weight and high-strength golf club head. [Solution] A head (2) comprising a face (4), a sole (8), and a crown (6). The face (4) has a face front surface (fs) and a face rear surface (fr). A plurality of protrusions (A) are provided in the face rear surface (fr). The protrusions (A) are dot shaped in the planar view. An arbitrary first direction and a second direction perpendicular to this first direction are defined in the planar view. Ideally, the regularity of arrangement of the protrusions (A) in the second direction is greater than the regularity of arrangement of the protrusions (A) in the first direction. Ideally, the first direction is vertical and the second direction is horizontal.

IPC Classes  ?

• A63B 53/04 - Heads

Abstract

[Problem] To provide a golf club head which improves various aspects of performance by virtue of the rib arrangement. [Solution] This head (2) is provided with a face (4), a crown (6) and a sole (8). A rib (rb) is formed on the inner surface of the sole (8). The rib (rb) has a sloped extending portion (ks1) which, from the heel side to the toe side, extends to approach the face. The center of gravity of the head is positioned on the heel side of the face center. The head (2) is hollow. Preferably, the sole (8) has a minimum thickness region. Preferably, the rib (rb) has a thin reinforcing section (rb2) positioned in the minimum thickness region. The rib (rb) may extend in a straight line. The rib (rb) may extend in a curve. Preferably, the sloping angle of the rib (rb) is 10°-45° relative to the toe-heel direction.

IPC Classes  ?

• A63B 53/04 - Heads

Abstract

[Problem] To provide a golf club shaft for which an appropriate degree of rigidity can be obtained and impact strength can be improved. [Solution] A shaft (6) has entire length layers (s3, s4, s7, s8, s9) disposed over the entire length direction of the shaft, and end portion layers (s1, s2, s10, s11, s12) disposed at the end part of the shaft. The entire length layers include bias layers (s3, s4) and straight layers (s8, s9). The end portion layers include an inner-side glass fiber strengthening layer (s1), and an outer-side low-elasticity carbon fiber strengthening layer (s10) or an outer side glass fiber strengthening layer (s10) either of which is disposed more to the outer side than the inner-side glass fiber strengthening layer (s1). The low-elasticity carbon fiber has a tensile elasticity of no more than 22 ton/mm2. The shaft (6) has a shaft weight of no more than 55g for 46 inches.

IPC Classes  ?

• A63B 53/10 - Non-metallic shafts

Abstract

This golf club shaft fitting method involves selecting a shaft having torque that matches a golfer on the basis of the swing of the golfer. The golf club shaft fitting method includes: a step in which measurement values are obtained from a sensor, which is capable of measuring angular velocities around three axes, by hitting a golf ball with a golf club having a clip to which the sensor is attached; a step in which prescribed index values are obtained for the angular velocities, which are quantified from the measurement values; and a step in which, on the basis of the relationship between the torque of a shaft and the index values, which are created according to pre-test hitting, a shaft that matches the golfer is selected from among a plurality of shafts for which torque has been measured in advance.

IPC Classes  ?

• A63B 53/00 - Golf clubs
• A63B 53/10 - Non-metallic shafts