Ball for play, therapy and sports training and method of manufacture
First Claim
1. A non-bouncing ball comprising a spherical core of rigid material surrounded by an outer layer of molded foamed polyurethane, said core and said outer layer forming an integral solid sphere, wherein said outer layer has a higher density than said core.
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Abstract
A ball is provided which includes a rigid core surrounded by an outer layer of foamed polyurethane. The core and outer layer are preferably both integral spheres, i.e. are not formed from separate hemispheres.
In preferred embodiments, the core is expanded polystyrene, and the outer layer is formed of an integral skin foam, i.e., a foam having a smooth non-porous skin over a microcellular open cell foam, and the foam is the reaction product of a MDI prepolymer, e.g., diphenylmethane diisocyanate prepolymer, and a urethane resin.
62 Citations
28 Claims
- 1. A non-bouncing ball comprising a spherical core of rigid material surrounded by an outer layer of molded foamed polyurethane, said core and said outer layer forming an integral solid sphere, wherein said outer layer has a higher density than said core.
- 20. A ball comprising a spherically shaped solid body, at least the outer portion of which comprises a high density integral skin foam, having on its surface a plurality of protrusions, said ball having a diameter of from about 18 to 28 inches and a weight of 18 to 28 pounds, said ball further including a low density core.
- 24. A ball comprising a low density spherical core of rigid material surrounded by a flexible high density outer layer of molded foam polyurethane, said core and said outer layer forming an integral solid sphere.
Specification