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Shut-off/equalizing valve with molded seals

  • US 4,844,413 A
  • Filed: 08/20/1984
  • Issued: 07/04/1989
  • Est. Priority Date: 08/20/1984
  • Status: Expired due to Fees
First Claim
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1. In a shut-off/equalizing valve having a body and a core assembly rotatably received within said body, the improvement in which said rotatable core assembly comprises:

  • a cylindrical metallic core member having an enlarged barrel portion, a cross bore formed therethrough and a shaft element for positioning said core member within said body; and

    an elastomeric seal element molded onto said core member, said seal element including a layer of elastomeric material covering the circumference of a portion of said core member and the interior of said cross bore, first and second circumferential sealing ribs adjacent the ends of said barrel portion encompassing the openings of said cross bore, one of which lies adjacent to the openings of said cross bore, and at least two pairs of longitudinal sealing ribs extending between said circumferential ribs, each pair being in straddling relation to the openings of said cross bore, to surround the cross bore by compressible sealing ribs.

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