Ferrofluid centrifugal seal

Details Ferrofluid centrifugal seal Ferrofluid centrifugal seal

1978-11-29

1980-04-29

Ward, Robert S.

Seal for a joint or juncture

Seal between relatively movable parts

Relatively rotatable radially extending sealing face member

277 13, 277135, F16J 1542, F16J 1516

Patent

active

042002966

ABSTRACT:
A ferrofluid centrifugal seal and method of sealing a rotatable shaft, wherein ferrofluid is retained in an O-ring-seal form at static and low speeds and is moved to a barrier seal in a passageway at high speeds.

REFERENCES:
patent: 2587077 (1952-02-01), Winther
patent: 2834618 (1958-05-01), Wiltse
patent: 2874982 (1959-02-01), Winther
patent: 2996162 (1961-08-01), Lehde
patent: 3097853 (1963-07-01), McHugh
patent: 3254745 (1966-06-01), Isakov et al.
patent: 3620584 (1971-11-01), Rosensweig
patent: 3746407 (1973-07-01), Stiles et al.
patent: 4054293 (1977-10-01), Hoeg

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