Fluid-filled resilient bushing having damping means within fluid

Details Fluid-filled resilient bushing having damping means within fluid Fluid-filled resilient bushing having damping means within fluid

1988-03-24

1989-08-15

Kashnikow, Andres

Spring devices

Resilient shock or vibration absorber

Including energy absorbing means or feature

2671405, 2671412, 248562, F16M 904, F16M 500

Patent

active

048567647

ABSTRACT:
A fluid-filled resilient bushing including a resilient member interposed between inner and outer sleeves, and an elastically yieldable partition member. The resilient member and the partition member cooperate with the outer sleeve to define a pressure-receiving chamber and an equilibrium chamber, which are disposed opposite to each other in a first direction in which the bushing receives a vibrational load. The chambers communicate with each other through an orifice. The bushing includes a damping device which has a first portion disposed within the pressure-receiving chamber, so as to extend from a bottom of the chamber. The first portion has a radial end face whose periphery is spaced apart from the periphery of the pressure-receiving chamber, such that an annular spacing is formed between the peripheries of the first portion and the chamber. A second portion of the damping device projects from the first portion in a direction perpendicular to the first direction, such that an annular gap is formed between the periphery of the second portion and the periphery of the pressure-receiving chamber. This annular gap is dimensioned smaller than the annular spacing, and is effective for isolating high-frequency vibrations.

REFERENCES:
patent: 3642268 (1972-02-01), Hipsher
patent: 3698703 (1972-10-01), Hipsher
patent: 4630806 (1986-12-01), Dan et al.
patent: 4690389 (1987-09-01), West
patent: 4700934 (1987-10-01), Andra et al.
patent: 4702346 (1987-10-01), Uno et al.
patent: 4749173 (1988-06-01), Kanda

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