Vibration isolating apparatus

Details Vibration isolating apparatus Vibration isolating apparatus

1997-01-15

1999-02-02

Oberleitner, Robert J.

Spring devices

Resilient shock or vibration absorber

Including energy absorbing means or feature

267219, F16F 500

Patent

active

058654283

ABSTRACT:
A vibration isolating apparatus includes: a first mounting member; a second mounting member; an elastic body provided between the first mounting member and the second mounting member; a main fluid chamber, the elastic body forming a portion of a partitioning wall of the main fluid chamber such that the main fluid chamber can expand and contract; a first auxiliary fluid chamber disposed so as to be separated from the main fluid chamber; a first restricting passage communicating the main fluid chamber and the first auxiliary fluid chamber; a second auxiliary fluid chamber disposed so as to be separated from the main fluid chamber; a second restricting passage communicating the main fluid chamber and the second auxiliary fluid chamber; a first diaphragm forming a portion of a partitioning wall of the first auxiliary fluid chamber; a second diaphragm forming a portion of a partitioning wall of the second auxiliary fluid chamber; an air chamber disposed in opposition to the second auxiliary fluid chamber with the second diaphragm being interposed between the air chamber and the second auxiliary fluid chamber, the air chamber being filled with air; and a switching valve which when open, communicates the air chamber with outside air, and when closed, closes the air chamber off from the outside air. Accordingly, an isolating characteristic can be varied at a low cost, and the characteristic can be maintained over time.

REFERENCES:
patent: 5092566 (1992-03-01), Freudenberg
patent: 5170998 (1992-12-01), Muramatsu
patent: 5205546 (1993-04-01), Schisler et al.
patent: 5246199 (1993-09-01), Numoto et al.
patent: 5314173 (1994-05-01), Ide et al.
patent: 5386977 (1995-02-01), Quast
patent: 5390341 (1995-02-01), Takano et al.
patent: 5462262 (1995-10-01), Gennesseaux

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