Hydraulic antivibration device

Details Hydraulic antivibration device Hydraulic antivibration device

2007-08-21

2007-08-21

Williams, Thomas (Department: 3683)

Spring devices

Resilient shock or vibration absorber

Including energy absorbing means or feature

Reexamination Certificate

active

11076062

ABSTRACT:
A hydraulic antivibration device capable of reducing sufficiently strange sounds and susceptible of dampening fine amplitude, high frequency vibrations is provided. A partition unit comparting a liquid-filled chamber is constructed of an elastic partition membrane and a pair of displacement-regulating members each provided with a central first opening and plural second openings around it. The elastic partition membrane includes a central thick-walled section located within the first opening, a thin-walled section around it, and a stationary section at the outer periphery thereof, plural first ribs and plural second ribs. The first ribs and the second ribs are extended at the inner peripheral margin part of the thin-walled section in a radial fashion from the thick-walled section, and portions of the thin-walled section circumferentially sectioned by the ribs front to the first opening so that liquid entering from the first opening may pass through a passage to the second openings.

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Patent Abstracts of Japan; vol. 2003, No. 07; JP 2003074617, Mar. 12, 2003.
Patent Abstracts of Japan; vol. 2003, No. 12; JP 2003 294078, Oct. 15, 2003.

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