Linear seal apparatus

Details Linear seal apparatus Linear seal apparatus

1980-06-03

1982-01-05

Smith, Robert I.

Seal for a joint or juncture

Seal between relatively movable parts

Relatively rotatable radially extending sealing face member

F16J 1554

Patent

active

043090400

ABSTRACT:
A seal apparatus to prevent the escape of a ferrofluid from a multiple-stage ferrofluid rotary seal about a shaft during axial movement of the shaft element, the seal apparatus comprising a pressure ring element against one facing wall of the rotary seal, a scraper ring element positioned within the pressure ring element, the scraper ring having a sharp forward edge adapted to contact the exterior surface of the shaft to prevent the escape of ferrofluid from the seal, and tension means to force inwardly the pressure ring and scraper ring toward the seal means.

REFERENCES:
patent: 3010742 (1961-11-01), Kosatka
patent: 3722896 (1973-03-01), Tankus
patent: 3788650 (1974-01-01), Place
patent: 3843140 (1974-10-01), Mayer et al.
patent: 4054293 (1977-10-01), Hoeg et al.
patent: 4171818 (1979-10-01), Moskowitz

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