Fluid-filled elastic cushioning device having stopper block for

Details Fluid-filled elastic cushioning device having stopper block for Fluid-filled elastic cushioning device having stopper block for

1988-09-06

1989-07-04

Butler, Douglas C.

Spring devices

Resilient shock or vibration absorber

Including energy absorbing means or feature

180312, 180902, 248562, 248636, 2671403, 2671412, 267219, F16F 1300

Patent

active

048444308

ABSTRACT:
A fluid-filled elastic cushioning device for elastically connecting a first and a second member, including an inner sleeve attached to the first member, an elastic body fitted on the inner sleeve and having two pockets which are open in opposite axial end faces of the elastic body, two closure members for closing the open ends of the pockets to thereby form two fluid chambers, an orifice member embedded in the elastic body and having an orifice communicating with the fluid chambers, and a mounting plate secured to the orifice member. At least one of opposite ends of the orifice is open at a bottom of the corresponding at least one of the pockets, and at least one stopper rubber block is secured to each of at least one of the closure members which closes the corresponding at least one of the pockets. Each rubber block extends into the corresponding one of the fluid chambers such that a free end of each rubber block is normally spaced apart from the corresponding open end of the orifice. Each rubber block is abuttable at the free end thereof on the corresponding end of the orifice member, to thereby close the orifice at the corresponding open end, when the cushioning device is subjected to an excessive vibrational load.

REFERENCES:
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patent: 4700934 (1987-10-01), Andra et al.
patent: 4717111 (1988-01-01), Saito
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patent: 4757982 (1988-07-01), Andra et al.
patent: 4781361 (1988-11-01), Makibayashi et al.
patent: 4790520 (1988-12-01), Tanaka et al.
patent: 4795140 (1989-01-01), Orikawa et al.

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