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Molded ball with fins

  • US 6,220,980 B1
  • Filed: 06/22/1998
  • Issued: 04/24/2001
  • Est. Priority Date: 06/27/1997
  • Status: Expired due to Term
First Claim
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1. An injection molded thermoplastic ball comprising:

  • a central parting line plane substantially bisecting said ball;

    a single central member adjacent to said central parting line plane, said central member having a single upper surface and a single lower surface; and

    a plurality of fins, some of which are joined to said upper surface of said central member and all remaining ones of which are joined to said lower surface of said central member;

    the outermost edges of said fins defining a sphere;

    all fins on said ball being oriented so as to radiate at substantially right angles from a said central parting line plane, such that said ball may be injection molded by injection of thermoplastic material into a mold and that when said mold opens at said parting line said ball may be freely released.

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