Hydraulic pump with an improved sealing arrangement

Details Hydraulic pump with an improved sealing arrangement Hydraulic pump with an improved sealing arrangement

1978-11-02

1980-02-05

Ward, Jr., Robert S.

Seal for a joint or juncture

Seal between relatively movable parts

Relatively rotatable radially extending sealing face member

277 95, 277 962, 277152, 277 65, F16J 1538, F16J 1540

Patent

active

041869290

ABSTRACT:
A pump comprising a casing, a shaft which rotates in the casing when the pump is in use, a seal which is subjected to pump inlet pressure, a flexible ring member positioned between the seal and an inlet for the pump, and a non-flexible ring member positioned between the seal and the flexible ring member, the pump being such that one of the flexible or non-flexible ring members is mounted on the shaft for rotation with the shaft and the other flexible or non-flexible ring member is mounted around the shaft but spaced from the shaft, whereby when the flexible ring member is not flexed pump inlet fluid can pass to the seal and whereby any sudden increase in pump inlet pressure causes the flexible ring member to flex and sealingly engage with the non-flexible ring member to prevent the sudden increase in pump inlet pressure the seal.

REFERENCES:
patent: 2833577 (1958-05-01), Reynolds
patent: 2862733 (1958-12-01), Reiersen
patent: 3135128 (1964-06-01), Rudolph
patent: 3291491 (1966-12-01), Smith
patent: 3703296 (1972-11-01), Malmstrom

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