Controlled oscillating damper

Details Controlled oscillating damper Controlled oscillating damper

2005-10-18

2005-10-18

Butler, Douglas C. (Department: 3683)

Brakes

Internal-resistance motion retarder

Electroviscous or electrorheological fluid

C188S267200, C188S306000, C188S290000, C267S140140

Reexamination Certificate

active

06955249

ABSTRACT:
Controlled oscillating damper, comprising: a housing (12) provided with a cavity (14), an oscillating element (18) moving sealingly within the cavity (14), in which the housing (12) and the oscillating element (18) have respective walls defining at least one chamber (44) filled with magneto-rheological or electro-rheological damping fluid, and at least one electrically controlled excitation device (46) equipped with at least one fluid passage (52) which a fluid flow gets through during the motion of the oscillating element (18). The excitation device (46) is stationary with respect to the housing (12) and is arranged so as to divide the damping chamber (44) into two sections of variable volume (44a, 44b) communicating one with the other through the passage (52).

REFERENCES:
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patent: 6318522 (2001-11-01), Johnston et al.
patent: 2002/0125086 (2002-09-01), Oliver et al.
patent: 2004/0007432 (2004-01-01), Biassiotto et al.
patent: 1 070 872 (2001-01-01), None
patent: 1531283 (2005-05-01), None
patent: 630829 (1947-11-01), None
patent: 8-177939 (1996-07-01), None

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