Damper with magnetic fluid

Details Damper with magnetic fluid Damper with magnetic fluid

2005-11-15

2005-11-15

Siconolfi, Robert A. (Department: 3683)

Brakes

Internal-resistance motion retarder

Magnetic fluid or material

C188S267000

Reexamination Certificate

active

06964324

ABSTRACT:
A damper in which magnetic particles are discouraged from settling irrespective of the kind of a magnetic fluid is provided. A damper is constituted of a vessel in which the magnetic fluid is accommodated and a slider (piston). As the piston, one that is made of a laminated body of a paramagnetic substance and a non-magnetic substance is used. When thus constituted, the magnetic particles stick to the piston. Accordingly, whatever magnetic fluid is used, the particles do not settle. The laminated body that is used as the piston has the non-magnetic substance at both ends thereof. When the laminated body is thus constituted, the magnetic particles sticks uniformly. When the laminated body has the magnetic substance at both ends, magnetic particles stick to both ends needle-like.

REFERENCES:
patent: 4049985 (1977-09-01), Sudler
patent: 4942947 (1990-07-01), Shtarkman
patent: 5263558 (1993-11-01), Yamaoka
patent: 5283234 (1994-02-01), Wang et al.
patent: 5354488 (1994-10-01), Shtarkman et al.
patent: 5542506 (1996-08-01), McMichael et al.
patent: 6382369 (2002-05-01), Lisenker
patent: 6497308 (2002-12-01), Lisenker
patent: 2003/0217901 (2003-11-01), Carlson

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