Vibration isolating apparatus

Details Vibration isolating apparatus Vibration isolating apparatus

1990-02-27

1991-08-06

Graham, Matthew C.

Spring devices

Resilient shock or vibration absorber

Including energy absorbing means or feature

262219, F16F 1504, F16F 600, F16M 300

Patent

active

050370715

ABSTRACT:
A vibration isolating apparatus interposed between a vibration-occurring portion and a vibration-receiving portion includes a liquid chamber partitioned into a plurality of small liquid chambers, an orifice allowing the small chambers to communicate with each other, and an electroviscous fluid filled in the liquid chamber and the orifice. Disposed in the liquid chamber are a movable plate for partitioning the liquid chamber, a groove portion for accomodating a peripheral edge of the movable plate in such a manner as to be movable in a thicknesswise direction of the movable plate by a predetermined amount, and a pair of electrodes for imparting an electric field to the electroviscous fluid in the groove portion. Hence, when the vibration isolating apparatus receives low-frequency vibrations, the pair of electrodes are energized to increase the viscosity of the electroviscous fluid between the electrodes, allowing the movable plate to be secured in the groove.

REFERENCES:
patent: 4720087 (1988-01-01), Duclos et al.
patent: 4757981 (1988-07-01), Hartel
patent: 4759534 (1988-07-01), Hartel
patent: 4793599 (1988-12-01), Ishioka
patent: 4861006 (1986-08-01), Takano et al.

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