Patent · US Expired

Check valve for use with a syringe

US4765588A · kind A · utility

141Cited by
8References
9Claims
0Family size

Assignee

Inventor

Key dates

Filing dateAug 18, 1986
Grant dateAug 23, 1988
Priority date—
Expiry dateAug 18, 2006

Classification

  • Technology area (CPC Y)Emerging Cross-Sectional Technologies
  • CPC primaryY10T137/7886
  • WIPO fieldMedical technology
  • WIPO sectorInstruments

Abstract

A check valve for sealing a fluid supply while permitting selective withdrawal of fluid includes a tubular side wall defining an insertion end and a supply end. A diaphragm is connected to the side wall and extends across the tube interior to close the interior. The diaphragm defines a slit therein extending diametrically across the diaphragm. The diaphragm is defined as a concave surface toward the insertion end of the side wall. A housing secures the side wall, encloses the supply end thereof, and exposes the insertion end. A port extends through the housing to communicate with the supply end.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.