06047698 is referenced by 40 patents and cites 6 patents.

A unidirectional fluid valve for use with a respirator includes a flexible flap initially formed as a flat resilient member. A valve body has a flat valve seat to support the flexible flap. The flexible flap is contoured to make contact with the valve seat when a fluid is not passing through the valve body, and free to lift from the valve seat when a fluid passes through the valve body. The valve body additionally includes an arm located off center relative to the flap and the arm extends inwardly in the valve body to contact the flexible flap off center to push the flexible flap at a position to deform the flexible flap to contour a concave configuration for the flexible flap and provide a secured end and a free end for the flap. In this way the flexible flap is normally pushed into sealing engagement with the flat valve seat when fluid is not passing through the valve body and is free to move away from the valve seat when fluid passes through the valve body.

Title
Unidirectional fluid valve
Application Number
9/140070
Publication Number
6047698
Application Date
August 20, 1998
Publication Date
April 11, 2000
Inventor
Michael Forbes Scholey
Pacoima
CA, US
Mark Magidson
Los Angeles
CA, US
Agent
Charles H Schwartz
Assignee
Moldex Metric
CA, US
IPC
F16K 15/16
A62B 9/02
A62B 18/10
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