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US 2017/0182370 A1Published application
Modulus transition layers for stiff core golf balls
OwnerDouglas P. DUFAUX, Timothy M. OWENSinventors
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Abstract
A golf ball is provided that includes at least two layers of material disposed between a spherical core and a cover layer, wherein the elastic modulus of each is within three orders of magnitude of each adjacent layer or core. The spherical core can be a hollow metal core. This results in a golf ball that is legal for play and capable of drive distances essentially equivalent to those of currently available high performance golf balls, but also provides a golf ball that has less hook and slice during play.
Claims20
A golf ball comprising:
- a cover layer having an outer surface defining a plurality of dimples and an inner surface opposite the outer surface;
- a spherical core having an outer surface disposed within the cover layer, wherein the spherical core has a stiffness of at least 1 GPa;
- and
- an innermost mantle layer and an outermost mantle layer disposed between the spherical core and the cover layer, wherein the innermost mantle layer has an inner surface disposed on the outer surface of the spherical core and the outermost mantle layer has an outer surface disposed on the inner surface of the cover layer;
- wherein the spherical core and the innermost mantle layer have an elastic modulus within three orders of magnitude of each other;
- wherein each of the cover layer, the outermost mantle layer, and the innermost mantle layer has an elastic modulus within three orders of magnitude of each adjacent layer.
3 more elements
A golf ball comprising:
- a cover layer having an outer surface defining a plurality of dimples and an inner surface opposite the outer surface;
- a spherical core having an outer surface disposed within the cover layer, wherein the spherical core has a stiffness of at least 1 GPa, and wherein the spherical core comprises at least one feature configured to control a vibrational response of the spherical core;
- and
- an innermost mantle layer and an outermost mantle layer disposed between the spherical core and the cover layer, wherein the innermost mantle layer has an inner surface disposed on the outer surface of the spherical core and the outermost mantle layer has an outer surface disposed on the inner surface of the cover layer;
- wherein the spherical core and the innermost mantle layer have an elastic modulus within three orders of magnitude of each other;
- wherein each of the cover layer, the outermost mantle layer, and the innermost mantle layer has an elastic modulus within three orders of magnitude of each adjacent layer.
3 more elements
Dependencies are inferred from the claim text.