Abstract:
PROBLEM TO BE SOLVED: To provide a putter golf club with a good touch. SOLUTION: The putter golf club is equipped with a comparatively hard face insert held by at least one damping layer. The putter club is further equipped with an inner weight arranged on the gravity center of the club. The putter club has a body and a sole plate. The body has a density substantially larger than that of the sole plate. A vibration damping system for golf clubs is also provided. COPYRIGHT: (C)2005,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To provide a metal wood golf club which improves the directional control of golf shots. SOLUTION: The face of a metal wood golf club head has a vertical center line near the core, a horizontal center line near the core of the face, the alignment line of the side of a toe which is in parallel with the vertical center line and is arranged at the approximate center point of the toe domain of a shell and the vertical center line, and the alignment line of the side of a heel which is in parallel with the vertical center line and is arranged at the approximate center point of the heel domain of a shell and the vertical center line. The face is arranged between the alignment line of the side of a toe and the alignment line of the side of a heel, and has a center section with a first bulge radius and a peripheral part adjacent to the center section. The first bulge radius is larger than a second bulge radius of the peripheral part. COPYRIGHT: (C)2005,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To provide a golf club making the trajectory of a hit ball more accurate despite off-center hits away from the sweet spot of a golf club face. SOLUTION: An iron golf club head has a thin (less than 0.12 inches) first section that has an expanded unsupported front face region. The first section forms a part of a leading edge and wraps around a sole section of the club to make the coefficient of restitution of the club head greater than 0.8. The club head utilizes a rear insert that supports the front face and allows the fine tuning of swing weights with no change in geometry or size of the club head. This is accomplished by utilizing weight adjustment inserts that is obtained by impregnating a tungsten added plastic into carbon fiber-epoxy sheets. The content of tungsten preserves a weight range without any size change in the sheets. COPYRIGHT: (C)2005,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To improve the physical property of a golf ball. SOLUTION: A golf ball comprises a cover, a core, and at least one intermediate layer interposed between the cover and the core, wherein the cover is formed from a blend comprising a segmented polyurethane elastomer copolymers of polyether (or ester)-ester and polyether (or ester)-amide. COPYRIGHT: (C)2005,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To provide a golf ball which is made of a polymer composition containing a halogenated organosulfur compound and regrind as a filler. SOLUTION: A golf ball consisting of a core and a cover is made of a polymer composition containing a halogenated organosulfur compound and regrind as a filler. The core has a diameter of about 3.91-about 4.01 cm (about 1.54-about 1.58 inches) and a compression of about 20-50. Additionally, the core includes a polybutadiene rubber having a Mooney viscosity of less than about 50 and a halogenated organosulfur compound present in an amount of at least about 2.2 parts per 100 parts of polybutadiene rubber and the regrind-filler in an amount of about 5-about 26.5 parts per 100 parts of polybutadiene rubber. The cover has a thickness of about 0.05-about 0.1 inches and consists essentially of a first ionomeric material and a second ionomeric material. COPYRIGHT: (C)2004,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To provide a golf ball containing a polyurethane material prevented from fading and suited to manufacturing the golf ball. SOLUTION: This golf ball comprises a layer including a saturated polyurethane composition formed of a saturated polyurethane prepolymer and a saturated curing agent, wherein the layer may be casted as an outer cover, formed as an intermediate layer, or both. The polyurethane substantially includes neither unsaturated carbon-carbon bond nor an aromatic group, so that the saturated polyurethane used for manufacturing this golf ball is prevented from fading by exposure, even if being exposed to the light for a long period. COPYRIGHT: (C)2004,JPO
Abstract:
PROBLEM TO BE SOLVED: To provide a golf club having a front portion of die-cut metal cup form welded to a cast body. SOLUTION: A crown/face to sole/face transition seam is arranged within the range of the front portion which is separated apart from a welding area. The front portion includes a wing element which is extended to a hosel and further extended under the hosel. The front portion is formed from a single sheet metal plate. A split hosel consists of upper and lower hosel elements, and both elements are cast into a body of a club head for the weight reduction of the hosel portion. A lower hosel element contains the boss member for accepting the lower part of a shaft. A boss member is variably arranged in a predetermined position, and can be set at both the preselected club lie or the club face angle. A body has the common casting parts into which only the welding section of the boss member to a lower hosel element is changeable. COPYRIGHT: (C)2004,JPO
Abstract:
The present invention is directed towards a multi-layer golf ball cover formed by a sandwich injection molding process (8), wherein said golf ball cover comprises an inner layer and outer layer therebetween of a second material. The present invention is directed towards a sandwich injection molding process for forming a multi-layer golf ball cover involving the steps of pushing a measured amount of a plasticized first material (11) into one end of an accumulation cylinder (15), pushing a measured amount of a plasticized second material (21) into the opposite end of the accumulation cylinder (15), and injecting both materials in a single plunging step, so that the first material substantially coats the surface of the mold while the second material substantially fills the interior of the first material.