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Device for establishing and breaking a fluid communication

  • US 4,049,233 A
  • Filed: 09/30/1976
  • Issued: 09/20/1977
  • Est. Priority Date: 10/03/1975
  • Status: Expired due to Term
First Claim
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1. In combination with first and second wall means forming first and second openings, respectively, said openings being spaced from each other and facing each other in substantially coaxial relation, a device surrounding said first opening for establishing and breaking fluid communication between the openings, said device comprising an inflatable ring operable, when inflated, to seal against the second wall means around the second opening to complete a fluid flow path between said openings, and a generally circular body located in said flow path in coaxial relation to the ring, said ring in its deflated state bearing sealingly against said body to prevent flow through said first opening.

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