Fluid-filled elastic mount having two differently tuned orifices

Details Fluid-filled elastic mount having two differently tuned orifices Fluid-filled elastic mount having two differently tuned orifices

1991-01-28

1992-09-08

Butler, Douglas C.

Spring devices

Resilient shock or vibration absorber

Including energy absorbing means or feature

180300, 180312, 248562, 248636, 267 35, 267219, 267 6428, 267 6414, 26714013, F16F 1300

Patent

active

051451565

ABSTRACT:
A fluid-filled elastic mount including a first support structure and a second support structure which are spaced from each other in a load-receiving direction, an elastic body for elastically connecting these structures, and a partition structure supported by the second support structure. The elastic mount has a pressure-receiving chamber partially defined by the elastic body, first and second variable-volume equilibrium chambers partially defined by respective flexible diaphragms, and first and second air chambers for permitting the respective diaphragms to elastically deform. The pressure-receiving chamber communicates with the first and second equilibrium chambers, through respective orifice passages which are tuned to different frequency ranges of vibrations. The present elastic mount includes a pressure control device connected to the second air chamber for changing a pressure in the second air chamber.

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