Check valve

Details Check valve Check valve

1998-05-15

1999-10-26

Ferensic, Denise L.

Fluid handling

Line condition change responsive valves

Direct response valves

137539, 13753319, F16K 1500

Patent

active

059710152

ABSTRACT:
A check valve having a housing (2, 4) and a ball (22) movably disposed therein on a guide member (28) and driven by a flowing medium, and able to come in contact with a seat (24) due to the force of gravity. The check valve is designed such that, even in case of low pressure differences or small back-flows of the flowing medium, a secure blocking is assured. To this end the guide means is configured as a ridge (28) of plastic which slopes toward the seat, on whose upper edge (30) the ball (22) can roll onto or into the seat (24), and the ridge (28) is disposed entirely within the first housing member (2).

REFERENCES:
patent: 2103427 (1937-12-01), Long
patent: 4244961 (1981-01-01), Schnabel
patent: 4286622 (1981-09-01), Ninomiya et al.
patent: 4687023 (1987-08-01), Harbison et al.

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