Spring devices – Resilient shock or vibration absorber – Including energy absorbing means or feature
Patent
1988-09-12
1989-11-28
Oberleitner, Robert J.
Spring devices
Resilient shock or vibration absorber
Including energy absorbing means or feature
248562, 280710, F16F 136, F16M 1300, B60G 1126
Patent
active
048832600
ABSTRACT:
A fluid-filled elastic bushing including an annular elastic body which is interposed between an inner and an outer sleeve and has a pair of axially intermediate connecting portions which define diametrically opposed parts of the circumference of the elastic body. The elastic body has an opening formed through its axially intermediate portion in its diametric direction, such that the opening is partially defined by the connecting portions and is open in diametrically opposed parts of the outer circumferential surface of the elastic body which are located between the connecting portions. The opening is closed by the outer sleeve, at the diametrically opposed parts of the outer circumferential surface of the elastic body, whereby a fluid chamber filled with a highly viscous fluid is defined around an axially intermediate portion of the inner sleeve. The bushing includes a restrictor member fixedly accommodated within the fluid chamber, so as to substantially divide the fluid chamber into two axially spaced-apart two parts, and so as to cooperate with the connecting portions of the elastic body and/or the inner circumferential surface of the outer sleeve, thereby defining a restricted portion or portions of the fluid chamber.
REFERENCES:
patent: 3907079 (1975-09-01), Chapman
patent: 4717111 (1988-01-01), Saito
patent: 4723791 (1988-02-01), Miura et al.
Oberleitner Robert J.
Tokai Rubber Industries Ltd.
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