Fluid handling – Line condition change responsive valves – Bi-directional flow valves
Patent
1974-11-11
1976-03-02
Cline, William R.
Fluid handling
Line condition change responsive valves
Bi-directional flow valves
1375251, F16K 1514
Patent
active
039411494
ABSTRACT:
A duckbill-umbrella valve capable of resisting undesired flow is provided by a cylindrical elongated member defining a passageway and including converging flexible lips which are strengthened by a radially outward portion of the cylindrical elongated member surrounding the flexible lips.
REFERENCES:
patent: 456028 (1891-07-01), Foster
patent: 3159176 (1964-12-01), Russell et al.
Baxter Laboratories, Inc.
Cline William R.
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