Back to results
US 5,820,488 AGranted
Golf ball and method of making same
OwnerMichael J. Sullivan, Thomas J. Kennedy +1inventors
InventorsMichael J. Sullivan, Thomas J. Kennedy, Mark Binette
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
OwnerMichael J. Sullivan, Thomas J. Kennedy +1inventors
InventorsMichael J. Sullivan, Thomas J. Kennedy, Mark Binette
Estimating the term…
A non-wound golf ball, comprising a central core, a cover having a thickness of at least about 30 mils and comprising a member selected from the group consisting of ionomers, acrylic acid, methacrylic acid and polyethylene surrounding the core, and a moisture barrier surrounding the core and being located between the cover and the core. The moisture barrier has a lower water vapor transmission rate than the cover and an average thickness substantially less than the cover thickness. The moisture barrier has a water vapor transmission rate which is sufficiently low to reduce the loss of coefficient of restitution of the golf ball by at least 5% if the ball is stored at 100.degree. F. and 70% relative humidity for six weeks as compared to the loss in coefficient of restitution of a golf ball which does not include the moisture barrier, has the same type of core and cover, and is stored under substantially identical conditions.
A non-wound golf ball, comprising a central core, a cover having a thickness of at least about 30 mils and comprising a member selected from the group consisting of ionomers, acrylic acid, methacrylic acid and polyethylene surrounding the core, and a moisture barrier surrounding the core and located between the cover and the core, the moisture barrier having a lower water vapor transmission rate than the cover and an average thickness substantially less than the cover thickness, the moisture barrier having a water vapor transmission rate which is sufficiently low to reduce the loss of coefficient of restitution of the golf ball by at least 5% if the ball is stored at 100.degree. F. and 70% relative humidity for six weeks as compared to the loss in coefficient of restitution of a golf ball which does not include the moisture barrier, has the same type of core and cover, and is stored under substantially identical conditions.
A non-wound golf ball comprising a central core, a cover comprising a member selected from the group consisting of ionomers, acrylic acid, methacrylic acid and polyethylene, and a moisture barrier surrounding the core and located between the cover and the core, the moisture barrier having a thickness of less than 20 mils and a water vapor transmission rate of less than 1.5 g.multidot.mil/100 in.sup.2 .multidot.day at 90% RH, 100.degree. F., ASTM D-96.
A method for reducing the loss in coefficient of restitution of a two-piece, non-wound golf ball upon exposure to moisture, the golf ball having a core and a cover with a thickness of at least 30 mils which comprises a member of the group consisting of ionomers, acrylic acid, methacrylic acid and polyethylene, the method comprising the steps of providing a golf ball core and forming a moisture barrier around the core for reducing the rate of entry of water into the core, the moisture barrier being located between the cover and the core having a water vapor transmission rate of less than 1.5 g.multidot.mil/100 in.sup.2 .multidot.day at 90% RH, 100.degree. F. ASTM D-96.
Dependencies are inferred from the claim text.