Magneto-rheological damper

Details Magneto-rheological damper Magneto-rheological damper

2008-09-25

2011-11-08

Williams, Thomas J (Department: 3657)

Brakes

Internal-resistance motion retarder

Magnetic fluid or material

C188S267000

Reexamination Certificate

active

08051961

ABSTRACT:
In a magneto-rheological variable damper (6), the piston (16) comprises an inner yoke (32), an outer yoke (31) concentrically surrounding the inner yoke and held in position by pair of end plates (33, 34) made of non-magnetic material and disposed on either axial end surfaces of the piston. The piston may be circumferentially surrounded by a piston cover (30) that may be made of non-magnetic material and serves a slide member that engages the inner circumferential surface of a cylinder (12). Alternatively, the end plates may serve as the slide member. In either case, the durability of the damper can be improved by using a wear resistant material for the slide member. In particular, the outer yoke may be made of material such as Permendur which has a high saturation magnetic flux density but a poor mechanical property. Thereby, the range of the damping force can be expanded. The slide member may be made of non-magnetic material having a favorable wear resistance such as austenite stainless steel and aluminum alloy. It is also possible to apply a plating or other surface processing to the sliding surface of the slide member to improve the wear resistance thereof.

REFERENCES:
patent: 6131709 (2000-10-01), Jolly et al.
patent: 6260675 (2001-07-01), Muhlenkamp
patent: 6311810 (2001-11-01), Hopkins et al.
patent: 6336535 (2002-01-01), Lisenker
patent: 6382369 (2002-05-01), Lisenker
patent: 6390252 (2002-05-01), Namuduri et al.
patent: 6637556 (2003-10-01), Lun
patent: 6948312 (2005-09-01), Goldasz et al.
patent: 2004/0195062 (2004-10-01), Anderfaas et al.
patent: S59-11934 (1982-07-01), None
patent: 2007-255705 (2007-10-01), None
patent: 2007-263221 (2007-10-01), None
patent: 2007-303582 (2007-11-01), None

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