Liquid-encapsulated bushing

Details Liquid-encapsulated bushing Liquid-encapsulated bushing

1997-06-18

1999-11-02

Oberleitner, Robert J.

Spring devices

Resilient shock or vibration absorber

Including energy absorbing means or feature

248636, F16F 500

Patent

active

059755091

ABSTRACT:
First, second, third and fourth liquid chambers including a liquid encapsulated therein are defined by disposition of first and second elastomeric members between outer and inner sleeves. The first and second liquid chambers communicate with each other through a first orifice having a relatively large diameter, and the first and third liquid chambers communicate with the second and fourth liquid chambers through a second orifice having a relatively small diameter. When a small load is input, the first and second liquid chambers are deformed to cause the liquid to pass through the first orifice, so that a relatively small damping force is produced by a resistance due to the liquid passing through the first orifice. When a large load is input, the third and fourth liquid chambers are deformed to cause the liquid to pass through the second orifice, so that a relatively large damping force is produced by a resistance due to the liquid passing through the second orifice. Thus, it is possible to provide a sufficient damping force over a range of a small input load to a large input load.

REFERENCES:
patent: 5060918 (1991-10-01), Kanda
patent: 5156379 (1992-10-01), Tabata
patent: 5299788 (1994-04-01), Kanda
patent: 5489086 (1996-02-01), Kanda

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