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Stopcock valve

  • US 5,755,683 A
  • Filed: 06/07/1995
  • Issued: 05/26/1998
  • Est. Priority Date: 06/07/1995
  • Status: Expired due to Term
First Claim
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1. A stopcock control valve comprising:

  • a first rigid member having a first surface, the first rigid member defining a first fluid-path portion with a first terminus at the first surface;

    a second rigid member having a second surface, the second rigid member defining a second fluid-path portion with a second terminus at the second surface,wherein the first terminus includes a groove defined on the first surface, the groove tapering from a large cross-sectional area to a small cross-sectional area,wherein the first and second rigid members are rotatable mounted with respect to each other so as to provide alternately (i) a fully open position (ii) a partially open position and (iii) a closed position, andwherein the first and second surfaces define a space therebetween;

    a resilient sealing member disposed in the space between the first and second surfaces and extending from the second surface to the first surface,the sealing member defining an aperture positioned to provide in the fully open position fluid communication between the first and second fluid-path portions,the sealing member being sealingly mounted to the second surface so that in the closed position the sealing member provides a seal preventing flow between the first and second fluid-path portions,the sealing member being located with respect to the groove to provide in the partially open position fluid communication between the first and second fluid-path portions through the groove as well as the sealing member'"'"'s aperture; and

    seal means disposed with respect to the space defined by the first and second surfaces for preventing flow of fluid out of the space except through the first fluid-path portion.

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