Games using tangible projectile – Golf – Ball
Patent
1997-01-17
1998-11-10
Marlo, George J.
Games using tangible projectile
Golf
Ball
473363, 473365, 473373, 473377, 473385, A63B 3706, A63B 3714
Patent
active
058335528
ABSTRACT:
The present invention provides a golf ball having good shot feel and controllability and showing excellent rebound characteristics to give long flight distance. The golf ball of the present invention includes a core and a cover present on the core, an intermediate layer optionally being present between the core and the cover, wherein at least one layer of the cover or the intermediate layer has a thickness of 1 to 3 mm and is formed from a composition having an elasticity modulus (E*) at -30.degree. to +20.degree. C. of 1,000 to 9,000 Kgf/cm.sup.2 and a loss tangent at -30.degree. to +20.degree. C. of 0.02 to 0.1., and the core, whether solid core or thread wound core, has a spring constant at compression deformation of 15 to 60 Kgf/mm. The present invention also provides in another embodiment a three piece solid golf ball which includes a solid core, an intermediate layer formed on the solid core and a cover covering the intermediate layer, wherein the cover is formed from a mixture of an ionomer resin and a diene rubber, has a thickness of 1 to 3 mm, and is formed from a cover composition having an elasticity modulus (E*) at -30.degree. to +20.degree. C. of 1,000 to 9,000 Kgf/cm.sup.2 and a loss tangent at -30.degree. to +20.degree. C. of 0.02 to 0.1; the intermediate layer has a thickness of 1 to 3 mm and is formed from a resin composition having an elasticity modulus (E*) at -30.degree. to +20.degree. C. of 5,000 to 20,000 kgf/cm.sup.2 and a loss tangent at -30.degree. to +20.degree. C. of 0.15 or less, the minimum value of the elasticity modulus of the intermediate layer being larger than that of the cover; and the solid core has a diameter of 30.7 to 38.7 mm and a spring constant at compression deformation of 20 to 55 Kgf/mm.
REFERENCES:
patent: 5553852 (1996-09-01), Higuchi et al.
patent: 5674137 (1997-10-01), Maruko et al.
Hamada Akihiko
Takemura Kouhei
Marlo George J.
Sumitomo Rubber Industries Ltd.
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