Resilient bushing structure filled with viscous fluid

Details Resilient bushing structure filled with viscous fluid Resilient bushing structure filled with viscous fluid

1987-07-14

1988-11-22

Kashnikow, Andres

Spring devices

Resilient shock or vibration absorber

Including energy absorbing means or feature

248562, 248636, F16F 136

Patent

active

047860367

ABSTRACT:
A fluid-filled resilient bushing including a generally annular resilient member interposed between inner and outer sleeves and having a generally annular recess open in the outer circumferential surface of an axially intermediate portion thereof. The outer sleeve fluid-tightly closes the annular recess, and thereby cooperates with the resilient member to define a generally annular fluid chamber filled with a viscous fluid. The bushing has portions for defining a pair of shearing gaps as two opposite portions of the annular fluid chamber which are opposite to each other diametrically of the inner sleeve, in a first diametric direction perpendicular to a second direction in which the bushing receives a vibrational load. The pair of shearing gaps extend substantially in the second diametric direction, and each gap has a dimension as measured in the first diametric direction, which dimension is determined to be small enough to enable masses of the viscous fluid in the shearing gaps to provide a viscosity resistance upon application of shearing stresses to the fluid masses due to the vibrational load received by the bushing.

REFERENCES:
patent: 3642268 (1972-02-01), Hipsher
patent: 3698703 (1972-10-01), Hipsher
patent: 4032202 (1977-06-01), Ishikawa et al.
patent: 4588174 (1986-05-01), Konishi
patent: 4630806 (1986-12-01), Dan et al.

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