Magnetic seal assembly

Details Magnetic seal assembly Magnetic seal assembly

1988-02-23

1989-01-03

Ward, Robert S.

Seal for a joint or juncture

Seal between relatively movable parts

Relatively rotatable radially extending sealing face member

277 81R, 277 85, F16J 1554

Patent

active

047951680

ABSTRACT:
A magnetic-type end face seal assembly for creating an airtight seal between a housing and a rotatable shaft which projects outwardly through a housing bore. An insert ring of magnetically attractable material surrounds the shaft within the bore, and has a seating ring of hard synthetic material externally fixed thereto and sealingly engaged with the wall of the housing bore. The insert ring defines a first annular seal face on the outer axial end thereof. A rotating ring arrangement encircles and is nonrotatably coupled to the shaft axially adjacent the insert ring. This rotating ring arrangement includes a ring-shaped magnet which is disposed closely axially adjacent but slightly spaced from the insert ring, and this magnet mounts thereon a face ring which defines a second annular seal face which is maintained in engagement with the first seal face due to the magnetic attraction between the magnet and the insert ring.

REFERENCES:
patent: 2843403 (1958-07-01), Stevenson
patent: 2883212 (1959-04-01), Laser
patent: 2913289 (1959-11-01), Stevenson
patent: 3050319 (1962-08-01), Colby
patent: 3080170 (1963-03-01), Colby
patent: 3170409 (1965-02-01), McLeod et al.
patent: 3788650 (1974-01-01), Place
Magnetic Seal Corporation Brochure, 4 pages, date unknown.
Chemical Engineering, Nov. 25, 1985, pp. 35-41.
Magnetic Seal Corporation Brochure, 9 pages, date unknown.

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