Spring devices – Resilient shock or vibration absorber – Including energy absorbing means or feature
Patent
1994-07-06
1996-03-26
Mitchell, David M.
Spring devices
Resilient shock or vibration absorber
Including energy absorbing means or feature
248562, 248636, F16F 500
Patent
active
055014330
ABSTRACT:
A vibration isolator includes a substantially sealed space within a housing 4 forming a liquid chamber by partitioning the sealed space with a diaphragm 5. The liquid chamber is further partitioned into first and second chambers 7 and 8 by a rubber partition wall 6. An orifice passage 9 is arranged to communicate between these two chambers 7 and 8. The rubber partition wall 6 is provided at its intermediate portion with a membrane portion 11, a part of which is adapted to serve as a stopper portion 12. When the membrane portion 11 is bent and deformed downwardly, the stopper portion 12 is pushed, at its front end, on a partition wall supporting member 14 for deformation. The repulsion force of the stopper portion 12 by the deformation varies non-linearly in response to the deformation of the membrane portion 11 and as a result, the spring characteristic of the membrane portion 11 also becomes non-linear.
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Patent Abstracts of Japan, vol. 14, No. 364 (M-1007) 7 Aug. 1990, JP-A-02 129 426.
U.S. patent application No. 06/825500 (Marjoram) filed Feb. 3, 1986.
Mitchell David M.
Muratori Alfred
Yamashita Rubber Kabushiki Kaisha
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