Claims
- 1. A combined check valve and pressure dump valve for a gas whose pressure may range from below to above an ambient pressure, comprising
- a walled chamber having gas passage means whereby to communicate gas pressure and having in addition thereto a gas conducting opening,
- a flexible rubber-like check valve mounted in said opening, said check valve there having a circumferential mounting flange by which it supported, and a mouth portion including lip portions extending therefrom and whose inner surfaces taper from said mouth portion toward each other for normal flatwise presentation againsteach other,
- whereby to part and thereby permit gas flow into said chamber on a deficiency of pressure therein below such ambient gas pressure and to seal together on excess of chamber pressure over such ambient pressure, in combination with
- a release pin whose cross section is sufficiently small, relative to the size of said lip portions, to distend and part them from each other without sealing about said pin, and
- means to insert said pin from outside the pressure chamber through the mouth portion of said check valve and inwardly between the tapering inner surfaces of said lip portions,
- whereby to distend and part same, thereby to suddenly dump and discharge any excess of chamber pressure over ambient pressure.
- 2. A releasable fluid flow valve as defined in claim 1, wherein
- the lip means are normally presented flatwise against each other, and
- material of which said flexible member is formed is characterized by surface cohesion,
- whereby the lip means will remain sealed when the inward and outward pressures are equal.
Parent Case Info
This is a division, of application Ser. No. 430,203 filed Jan. 2, 1974 now Pat. No. 3,912,247.
US Referenced Citations (4)
Foreign Referenced Citations (2)
Number |
Date |
Country |
578,876 |
Jul 1959 |
CA |
1,308,977 |
Oct 1962 |
FR |
Divisions (1)
|
Number |
Date |
Country |
Parent |
430203 |
Jan 1974 |
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