Abstract: A golf ball, comprising:a core;an inner cover layer formed over the core, the inner cover layer having a Shore D hardness of at least 60 as measured on the curved surface thereof, andan outer cover layer formed over the inner cover layer, the outer cover layer having a Shore D hardness of no more than 53 as measured on the curved surface thereof,at least one of the inner and outer cover layers comprising at least one member selected from the group consisting of polycarbonates, reaction-injection-molded polyurethanes, and styrene-butadiene elastomers,the golf ball having a PGA compression of 100 or less and a coefficient of restitution of at least 0.750.

Abstract: A solid golf ball having good shot fee, high spin amount and excellent durability and having an intermediate layer formed on the core, and a cover covering the intermediate layer, wherein the cover has a Shore D hardness of 40 to 55, the core has a diameter of 31 to 36 mm and a JIS-C hardness of 60 to 85, the intermediate layer has a lower JIS-C hardness than that of the core by 5 to 25, and the average specific gravity of the core and the intermediate layer is within the range of from not less than 1.0 to less than 1.3. The intermediate layer and the core are formed from a vulcanized molded rubber composition comprising a base rubber, a metal salt of an unsaturated carboxylic acid, an organic peroxide and a filler.

Abstract: A golf ball includes a hollow core formed of a material having a specific gravity of 1.05-1.25 and having a concentric spherical inner cavity, a cover formed on the outer surface of the hollow core, and a resin layer applied onto the inner surface of the hollow core and having a thickness of 1-3 mm. The resin layer is preferably formed of a material having an Izod impact resistance of 50 J/m or greater. The hollow core preferably has a wall thickness of 7-11 mm. The Shore D hardness of the resin layer is preferably greater than that of the hollow core by at least 10. The golf ball does not suffer breakage of the hollow core due to an impact acting on the golf ball upon being hit, and has proper degrees of hardness and resilience in order to increase travel distance.

Abstract: A three-piece wound golf ball having improved characteristics of moment of inertia, initial spin and total flight distance with minimal dispersion, the ball comprising:a solid center core portion which is substantially spherical, is composed mainly of polybutadiene having a core diameter of 1.35-1.50 inches (34.3-38.1 mm), a specific gravity of 1.23-1.24; and a Shore D durometer hardness of 55-75 and a compression of 59-75 on an Atti compression tester;an intermediate thread-wound portion wound with an elastomeric thread material upon the core portion to a diameter of 1.540-1.600 inches (39.1-40.6 mm), the thread having an elongation of 800-1000%, a tensile strength of 4000-5000 psi, and a rectangular cross-section configuration of 0.0625 (+/-0.002) inch .times.0.024(+/-0.

Abstract: The present invention provides a thread wound golf ball having excellent durability, heat resistance and impact resilience, which comprises a core, a thread rubber layer and an outer layer. A thread rubber constituting the thread rubber layer comprising a solid rubber containing a high-cis polyisoprene rubber as a main rubber material and a liquid polybutadiene rubber and/or liquid butadiene-isoprene copolymer rubber as a rubber component.

Abstract: Disclosed is a solid golf ball containing at least one rubber portion formed from a rubber composition comprising a base rubber, a co-crosslinking agent and an organic peroxide; an improvement being present in that the base rubber is a mixture of(A) a solid polybutadiene rubber containing cis-1,4 bonds in an amount of at least 40%, and(B) either a liquid polybutadiene rubber or a liquid isoprene-butadiene copolymer rubber, or both.

Abstract: A golf putter having a novel putter head is disclosed. The putter head includes a body of generally rigid material and a resilient laminated striking face which is secured to a club face undersurface defined by the putter head body. The laminated striking face includes at least an outer layer of resilient material having an outer surface for striking a golf ball and an inner layer of resilient material which is secured against the club face undersurface and which has a hardness which is less than that of the outer layer. The resilient outer layer preferably has a hardness which is equal to or greater than the hardness of a golf ball which is generally greater than about 90 durometers A.

Abstract: An improved bumper for a fussball game table constructed with a plurality of apertures for improving the energy dissipation thereof. Each bumper is constructed of solid rubber in a generally cylindrical configuration having a central aperture formed therethrough for snugly receiving an actuation rod therein. The walls of the bumper include a plurality of apertures formed axially therethrough for removing mass therefrom. The apertures reduce the structural strength of the rubber bumper and increase its longitudinal compressibility to permit a harder, more reliable rubber to be utilized with sufficient energy absorptive characteristics for dissipating forces generated in the use of the actuation rods of the fussball game table.

Abstract: An improved golf ball cover is disclosed. The cover has balata replaced by cis 1,4 polybutadiene in an amount up to 30 parts without producing a deleterious effect on the cover yet maintaining the good "clock" and "feel" of a balata covered golf ball and increasing the toughness of the ball cover.

Abstract: There are disclosed foamable compositions comprising at least one polyisocyanate, at least one polyhydroxy compound and at least one blowing agent having evenly distributed therethrough discrete particles of cellular rubber. The resulting urethane foam-cellular rubber is suitable for use as a target backstop, e.g., archery target backstop.

Abstract: An iron type golf club head having the whole or the central part of a ball striking face thereof, which directly touches a golf ball, fabricated from a material possessing a compression Young's modulus (modules of longitudinal elasticity) lower than that of steel.

Abstract: The invention relates to a frame for a games racket e.g. tennis, of the type made as a hollow injection moulding of reinforced thermoplastics material. The frame has attachments for stringing in the form of a series of discrete lugs moulded integrally with the walls of the hollow frame and so positioned that the racket strings in their desired positions do not pass to the outer periphery of the head. The discrete lugs may for example be around the inner periphery of the head of the frame and each contain an integrally-moulded circumferential bore for string passage. The frame may be made by injection moulding around a fusible core and the shape of the core required to give the desired lugs provides strong resistance to movement under the injecting pressures hence giving improved product uniformity.

Abstract: Improved fiber resin matrix prepreg fabrics are disclosed which are comprised of a first layer of reinforcing fabric coated with an epoxy resin composition and a discrete second layer of an epoxy resin modified with an elastomeric polymer. The discrete second layer is provided with a support comprising a gauze-like, lightweight fibrous mat or carrier of lightweight fibers that preserves the second "interleaf" layer during cure. Cured composites having the continuous interleaf layer intact exhibit high impact strength and resistance to impact damage.

Abstract: Novel ball-gripping inserts adapted to be attached within receiving holes bored into the surface of a bowling ball in order to provide lined finger- and thumb-receiving holes which improve the ability of the bowler to grip and release the ball in the desired manner. The present elements are molded from silicone rubber so as to be generally cylindrical, relatively thin-walled hollow elements which are adapted to receive the fingers and thumb of the bowler therewithin. An essential feature is the presence of a seat or finger tip-engaging portion at the base of the finger-receiving opening to limit and uniformly guide the extent to which the fingers are inserted. Another essential feature involves the presence of a cut or recess in the interior wall of the insert, in a location adjacent the fingernail of the bowler, to facilitate the entry of air and release the vacuum caused by the rapid removal of the fingers from the elements during release of the ball.

Abstract: A core for a tennis-ball, the tennis-ball having either an internal pressure substantially equal to atmospheric pressure (a "pressureless" ball) or an internal pressure of up to 7 p.s.i. (0.49 Kg.cm.sup.-2) above atmospheric pressure (a "low-pressure" ball), in which the core is made from a rubber composition wherein up to 60% by weight of the total polymer content comprises either a copolymer of ethylene and propylene (an EPM elastomer) or a terpolymer of ethylene, propylene and up to 12% by weight of a non-conjugated diene monomer (an EPDM elastomer). The most suitable EPM and EPDM elastomers are those containing 70 mole percent or more ethylene.

Abstract: Solid golf balls, characterized by high initial velocity as well as outstanding retention of properties on continued hitting, are made from a blend of a resilient elastomer (e.g., cis-polybutadiene) and zinc oxide-methacrylic acid reaction product, the composition being cured with a free-radical cross-linking agent such as peroxide.

Abstract: A golf ball center composition comprising by weight 100 parts of a resilient elastomer, not more than 25 parts of a monomer capable of grafting, cross-linking or chain-extending the elastomer and not less then 70 parts of an inert filler, the composition being cured and having a Shore C hardness of not less than 60.degree.; a golf ball comprising said center, an elastic thread wound around the center to form a core, and a cover molded onto the core; and a method of making such golf ball.

Abstract: An improved golf ball is made from a composition comprising an unsaturated elastomer cross linked with a chain comprising the reaction product of a monohydric alkenyl ester and a diisocyanate or a diisothiocyanate.

Abstract: In a homogeneous molded golf ball comprising a filled elastomer highly cross-linked into a three dimensional network with long, flexible cross-links formed of a polymerized cross-linking monomer, the improvement which comprises using as said cross-linking monomer a metal-containing cross-linkable monomer whereby said comonomer simultaneously functions as said filler at least in part. The preferred elastomer is cis-polybutadiene. The metal-containing cross-linkable monomer can be formed in situ or added as such and preferably comprises a salt of at least one metal selected from the group consisting of zinc, magnesium and calcium, and at least one acid selected from the group consisting of methacrylic, acrylic, cinnamic, acotinic, crotonic, vinylacetic, itaconic, styrenesulfonic and benzoylacrylic acids. Additional filler may be added to adjust the density to the desired value.

Abstract: The invention provides tennis balls which comply in their behavior with the requirements of the "Rules of the International Lawn Federation" and which consist wholly or partially of a rubber based on natural and/or synthetic rubber which contains 15 to 50 parts by weight of a finely powdered aminoplast resin with a specific surface area of >5m.sup.2 /g. Suitable fillers for the rubber are urea/formaldehyde and melamine/formaldehyde polycondensation products. The tennis balls according to the invention can either have an internal gas pressure of 1.4 to 2.3 kg/cm.sup.2 (absolute) or they can be non-inflated, i.e. internally they have atmospheric pressure. The good behavior of these tennis balls is retained over an extended period of play. The tennis balls according to the invention are either provided with a textile or felt covering or they have no covering.

Abstract: A friction grip for the handles of bats, rackets and the like which has a permanent tacky feel increasing in tackiness as the hands of a user heat up and perspire is provided by coating the handle with a composition having a synthetic rubber base, an anti oxidant such as zinc oxide, a hydrocarbon tackifier such as rosin, a thickener and anti-slip material such as flocked silica, a blend of slow and fast evaporating solvents, and a defoamer. The grip has an open pore surface, and is permanently bonded to the handle by a mere drying of the composition. The bat or racket handle is preferably composed of metal, such as magnesium, and coated with a plastics base paint providing a barrier between the grip material and the metal body.

Abstract: Disclosed is a solid golf ball containing at least one rubber portion formed from a rubber composition comprising a base rubber, a co-crosslinking agent and an organic peroxide; an improvement being present in that the base rubber is a mixture of(A) a solid polybutadiene rubber containing cis-1,4 bonds in an amount of at least 40%, and(B) either a liquid polybutadiene rubber or a liquid isoprene-butadiene copolymer rubber, or both.