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Headed fastener with precisely calculated groove under head to accommodate O'ring sealing member as a self-sealing assembly

  • US 6,231,286 B1
  • Filed: 07/18/1996
  • Issued: 05/15/2001
  • Est. Priority Date: 07/18/1996
  • Status: Expired due to Fees
First Claim
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1. A fastener, comprising:

  • a head having a lower surface;

    a shank extending from said lower surface of said head;

    said head having a groove in said lower surface, said groove surrounding said shank at said lower surface of said head, said groove having an inner wall and an outer wall, and said inner wall having a proximal end adjacent said lower surface of said head, said proximal end being disposed radially remotely from said shank; and

    a sealing element disposed at least partially within said groove, said sealing element having an uncompressed volume that is substantially the same as a volume of said groove.

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