Game ball for urban use
First Claim
1. A game ball having sufficient durability to withstand prolonged use on hard pavement, comprising:
- a foam core formed from a mixture of a polyol and an isocyanate, the core having a compression of 0.06-0.07 inch when subjected to a force of 10 lbs. and a coefficient of restitution at 88 feet per second of less than 0.45, anda molded cover formed over the core, said cover including simulated stitching and having an average abrasion weight loss of less than 0.1% when subject to the Laboratory Test Procedure for Abrasion Resistancethe ratio of the coefficient of restitution of the ball to the coefficient of restitution of the core being in the range of 0.90-0.99.
10 Assignments
0 Petitions
Accused Products
Abstract
A game ball having a softer core and abrasion resistant cover is particularly well suited for play on hard pavements and cement in inner city areas. The ball has a polyurethane foam core formed from a mixture of 100 parts polyol and 33-40 parts isocyanate. The core has a compression of 0.06-0.07 inches when subjected to a force of 10 lbs. and a coefficient of restitution at 88 feet per second of less than 0.45, and preferably 0.30-0.40. A molded polyvinyl chloride plastisol cover is formed over the core, resulting in a game ball for which the ratio of the coefficient of restitution of the ball to the coefficient of restitution of the core is in the range of about 0.90-0.99. The cover preferably is a durable molded cover having a Shore A hardness of about 60-70 and a tensile strength of about 1,400-1,800 psi. The ball of the invention has restricted flight characteristics and is particularly well suited for use on smaller ball fields.
27 Citations
20 Claims
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1. A game ball having sufficient durability to withstand prolonged use on hard pavement, comprising:
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a foam core formed from a mixture of a polyol and an isocyanate, the core having a compression of 0.06-0.07 inch when subjected to a force of 10 lbs. and a coefficient of restitution at 88 feet per second of less than 0.45, and a molded cover formed over the core, said cover including simulated stitching and having an average abrasion weight loss of less than 0.1% when subject to the Laboratory Test Procedure for Abrasion Resistance the ratio of the coefficient of restitution of the ball to the coefficient of restitution of the core being in the range of 0.90-0.99. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification