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Laminar flow connector for blood and sterile solutions

  • US 4,398,757 A
  • Filed: 02/18/1981
  • Issued: 08/16/1983
  • Est. Priority Date: 02/18/1981
  • Status: Expired due to Fees
First Claim
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1. A laminar flow connector for blood and sterile solutions, comprisingfirst and second coupling members releasably connected to define a coaxial fluid passageway to conduct said solutions,said first coupling member providing a tubular opening of a substantially uniform first diameter and an external circumferential surface of varying diameter including a first surface portion of a first diameter adjacent to a first end and a second surface portion of a second diameter substantially greater than said first diameter and forming an annular projection providing an annular shoulder between said first and second surface portions,an annular seal removably connected to surround said first surface portion of said first member and extending from said annular shoulder to a location spaced from said first end,said second coupling member providing a tubular opening of varying diameter including a first tubular portion with a substantially uniform first diameter and a second tubular portion with a second diameter larger than said first diameter and an annular stop separating said first and second tubular portions with said annular stop removably engaging said first end of said first coupling member to provide a substantially uniform diameter passageway with said first and second members joined together and with said second tubular portion removably engaging in a tight fit said first surface portion of said first member and a third tubular portion with a third diameter larger than said second diameter and forming an annular ledge between said second and third tubular portions to removably engage said seal in a tight fit in a connected position,said second coupling member including a series of circumferentially spaced fingers axially extending to surround said annular projection provided by said first member, with each finger including a radially extending camming surface, andan annular sleeve axially movable along said second member between a first position allowing said fingers to be biased radially outward to permit axial movement between said first and second members and a second position to engage a circumferential surface of said sleeve with said camming surfaces to bias said fingers radially inward to firmly engage said fingers against said annular projection to provide a firm connection between said first and second connectors without directly subjecting said seal to the solutions within said passageway.

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