Tide gate valve with curvilinear bill

Fluid handling – Line condition change responsive valves – Direct response valves

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Details

137847, 137850, F16K 1514

Patent

active

057275939

ABSTRACT:
An inversion-resistant check valve or tide gate valve has a sleeve bounding a longitudinally extending, flow-through passage for fluids. The sleeve has an intermediate region and an upstream fluid inlet end region mountable on a discharge end of a conduit which is elongated along a longitudinal first axis of symmetry. The sleeve also has a downstream fluid outlet end region comprised of two or more thin and flexible lips which are opposed to each other and which are pre-formed to define a bill which is curvilinear. The lips are thinner and more flexible than the intermediate region. The curvilinear bill ensures sealing of the thinner, more flexible lips, allows easier opening of the valve, and reduces the likelihood of gapping in the lips. Unwanted backflow through the check valve is thereby prevented.

REFERENCES:
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patent: 3422844 (1969-01-01), Grise
patent: 4163509 (1979-08-01), Amneus
patent: 4492253 (1985-01-01), Raftis
patent: 4501374 (1985-02-01), Robertson
patent: 4585031 (1986-04-01), Raftis et al.
patent: 4607663 (1986-08-01), Raftis et al.
patent: 4828554 (1989-05-01), Griffin
patent: 5330437 (1994-07-01), Durman

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