×

Check valve, especially for the medical technique

  • US 5,771,935 A
  • Filed: 01/09/1997
  • Issued: 06/30/1998
  • Est. Priority Date: 12/06/1995
  • Status: Expired due to Term
First Claim
Patent Images

1. A check valve for the medical technique in a fluid pressure range from 0.1 to 0.02 bar comprising a first hose connector housing and a second hose connector housing, said first hose connector housing having a lip shaped sealing ring and a fluid entry space and said second hose connector housing having a compression ring (12) that defines a compression ring passage (16) and a fluid exit space, said first and second hose connectors joined together, and an imperforate diaphragm disk consisting of a flexible material positioned between the first and second hose connector housings, thereby forming a ring-shaped valve space (10) in the first hose connector housing and a generally annular bypass channel (18) around the circumference of said diaphragm disk (3), said diaphragm disk at an overpressure in the entry space is liftable from the lip-shaped sealing ring, whereby a flow cross-sectional area is created and said ring-shaped valve space (10) fluidly communicates with said compression ring passage (16) to permit fluid communication between said entry space and exit space of said first and second hose connector housings and which at an overpressure in the exit space said diaphragm disk is pressed onto the lip-shaped sealing ring to close the valve, wherein the circular diaphragm disk (3) is of a material selected from the group consisting of liquid silicone, silicone rubber or natural rubber and in that the thickness (3c) of the diaphragm cross-section (3a ) is generally uniform.

View all claims
  • 4 Assignments
Timeline View
Assignment View
    ×
    ×