Hydraulic bearing with electromagnetically compensated chambers

Details Hydraulic bearing with electromagnetically compensated chambers Hydraulic bearing with electromagnetically compensated chambers

1993-02-08

1994-09-13

Graham, Matthew C.

Spring devices

Resilient shock or vibration absorber

Including energy absorbing means or feature

188267, F16F 1503

Patent

active

053461924

ABSTRACT:
A rubber bearing, in which a liquid-filled working chamber is bounded by an expanding member and by a compensating wall that is capable of moving back and forth in the direction of the working chamber, wherein the compensating wall consists at least partially of a material that is capable of being moved by magnetic forces and extends relatively movably with one partial area into an air gap between a pair of coils comprised of two mutually opposing magnetic coils, which are rigidly supported in two coil braces and are capable of receiving an electric alternating current. The magnetic fluxes of the magnetic coils in the air gap are superimposed upon the magnetic flux of at least one permanent magnet, and the magnetic coils synchronously receive an electric current in such a way that the magnetic flux generated by the permanent magnet is strengthened on one side of the compensating wall and weakened on the other side of the compensating wall.

REFERENCES:
patent: 4650170 (1987-03-01), Fukushima
patent: 4693455 (1987-09-01), Andra
patent: 4762306 (1988-08-01), Watanabe et al.
patent: 4793599 (1988-12-01), Ishioka
patent: 4872652 (1989-10-01), Rohner et al.
patent: 4899996 (1390-02-01), Maassen et al.
patent: 5042786 (1991-08-01), Freudenberg et al.
patent: 5238232 (1993-08-01), Kobayashi et al.

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