Magnetically-controlled rotary seal

Details Magnetically-controlled rotary seal Magnetically-controlled rotary seal

2007-07-10

2011-10-18

Pickard, Alison (Department: 3674)

Seal for a joint or juncture

Seal between relatively movable parts

Relatively rotatable radially extending sealing face member

C277S302000, C277S400000, C277S410000

Reexamination Certificate

active

08038155

ABSTRACT:
A non-contacting rotary face seal assembly includes a first sealing member, including a first sealing face and a first magnetic element; and a second sealing member, including a second sealing face and a second magnetic element. The first and second magnetic elements of the first and second sealing members provide a magnetic repulsion force between the first and second magnetic elements such that the magnetic repulsion force separates the first and second sealing faces before hydrodynamic or hydrostatic forces associated with rotation of the second sealing member become sufficient to prevent the first and second sealing faces from contacting.

REFERENCES:
patent: 2843403 (1958-07-01), Stevenson
patent: 3869135 (1975-03-01), Diederich
patent: 4447063 (1984-05-01), Kotzur et al.
patent: 4480026 (1984-10-01), Ashcraft et al.
patent: 5078411 (1992-01-01), Geco
patent: 5137286 (1992-08-01), Whitford
patent: 5161804 (1992-11-01), Orlowski et al.
patent: 5730447 (1998-03-01), Dawson et al.
patent: 6220602 (2001-04-01), Webster et al.
patent: 6341781 (2002-01-01), Matz et al.
patent: 6805358 (2004-10-01), Dawson et al.
patent: 6845986 (2005-01-01), Hood et al.
patent: 6887048 (2005-05-01), Hirata et al.
patent: 6933643 (2005-08-01), Heine et al.
patent: 7044470 (2006-05-01), Zheng
patent: 7216871 (2007-05-01), Datta
patent: 7252291 (2007-08-01), Khonsari et al.
patent: 2006/0244221 (2006-11-01), Villeneuve et al.
patent: 0105616 (1984-04-01), None
patent: 1344943 (2003-09-01), None
patent: 1835207 (2007-09-01), None
European Patent Office, International Search Report and Written Opinion for PCT/IB2008/001780, mailed May 14, 2009.

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