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Non-rebreathing valve and valve element therefor

  • US 5,501,214 A
  • Filed: 09/26/1994
  • Issued: 03/26/1996
  • Est. Priority Date: 09/26/1994
  • Status: Expired due to Fees
First Claim
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1. A valve element formed of flexible, resilient material, said valve element comprising:

  • a peripheral portion;

    a sealing portion contiguous with and extending radially inwardly of said peripheral portion; and

    a hollow, wedge-shaped formation contiguous with and projecting from said sealing portion, said wedge-shaped formation having a base defining an opening in said sealing portion and a distal end terminating in a slot;

    wherein said sealing portion includes means for preventing inversion of said wedge-shaped formation under pressure applied against said wedge-shaped formation, said means for preventing inversion of said wedge-shaped formation comprising a substantially semi-toroidal region projecting from said sealing portion in a direction generally opposite to said wedge-shaped formation.

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