Magnetic fluid seal apparatus

Details Magnetic fluid seal apparatus Magnetic fluid seal apparatus

1993-02-25

1993-12-21

Cuchlinski, Jr., William A.

Seal for a joint or juncture

Seal between relatively movable parts

Relatively rotatable radially extending sealing face member

277227, 277DIG6, F16J 1532

Patent

active

052716317

ABSTRACT:
A magnetic fluid seal is improved by coating parts of the sealing mechanism and/or adjacent surfaces with a fluorine-containing surfactant as an oil-repelling layer. The surfactant is effective to prevent the spread of the oil-based magnetic fluid into interior mechanisms of the sealed apparatus, which may typically require a high degree of cleanliness.

REFERENCES:
patent: 3818074 (1974-06-01), Albrecht
patent: 4462332 (1984-07-01), Nath et al.
patent: 4486026 (1984-12-01), Furumura et al.
patent: 4628384 (1986-12-01), Raj et al.
patent: 4692826 (1987-09-01), Raj et al.
patent: 4786658 (1988-11-01), Hashimoto et al.
patent: 5215313 (1993-06-01), Yokouchi et al.
"Fluorine-Containing Surfactants Active Agent", vol. '79-7, pp. 11-22, date unknown.
U.S. Trademark Disclosure No. 842,293, registered Jan. 16, 1968.

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