Brakes – Internal-resistance motion retarder – Using magnetic flux
Reexamination Certificate
2008-09-19
2009-12-08
Burch, Melody M (Department: 3657)
Brakes
Internal-resistance motion retarder
Using magnetic flux
C188S267200, C188S378000
Reexamination Certificate
active
07628254
ABSTRACT:
A damper containing magneto-rheological (“MR”) fluid and a plunger lies between and is mechanically coupled both to a fixture and a vibration source. The plunger has a head immersed in the MR fluid. Annular magnets circumscribe the damper and produce a magnetic field surrounding the damper. A tubular shielding sleeve composed of magnetically impermeable material surrounds a portion of the damper. The sleeve is mechanically coupled both to the fixture and the vibration source by springs, and can translate relative to the damper to affect the strength of the magnetic field acting on the MR fluid surrounding the plunger head. The sleeve oscillates responsive to vibration of the vibration source and controls the viscosity of the MR fluid surrounding the plunger head in proportion to the amplitude of the sleeve's oscillation. The resonant frequency of the sleeve is adjusted to approximate the fundamental resonance of the fixture.
REFERENCES:
patent: 3504792 (1970-04-01), Grieve et al.
patent: 4351515 (1982-09-01), Yoshida
patent: 4676518 (1987-06-01), Kartchner et al.
patent: 5452745 (1995-09-01), Kordonsky et al.
patent: 5632361 (1997-05-01), Wulff et al.
patent: 5683615 (1997-11-01), Munoz
patent: 5803213 (1998-09-01), Davis et al.
patent: 5947240 (1999-09-01), Davis et al.
patent: 6082719 (2000-07-01), Shtarkman et al.
patent: 6135390 (2000-10-01), Sciulli et al.
patent: 6196528 (2001-03-01), Shtarkman et al.
patent: 6196529 (2001-03-01), Shtarkman et al.
patent: 6390253 (2002-05-01), Oliver
patent: 0391066 (1990-10-01), None
patent: 05346137 (1993-12-01), None
Alexander Paul W.
Davies Richard K.
Griffin Steven F.
Gruits Jennifer A.
Gussy Joel D.
Burch Melody M
Skorich James M.
The United States of America as represented by the Secretary of
LandOfFree
Passive magneto-rheological vibration isolation apparatus... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Passive magneto-rheological vibration isolation apparatus..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Passive magneto-rheological vibration isolation apparatus... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4143713