Spring devices – Resilient shock or vibration absorber – Including energy absorbing means or feature
Patent
1990-12-14
1992-02-18
Peters, Jr., Joseph F.
Spring devices
Resilient shock or vibration absorber
Including energy absorbing means or feature
267219, 2671401E, F16F 500
Patent
active
050887033
ABSTRACT:
A vibration isolating apparatus includes an inner cylinder supported by one of a vibration producing portion and a vibration receiving portion; an outer cylinder supported by the other and disposed around an outer periphery of the inner cylinder in such a manner as to surround the inner cylinder; a liquid chamber provided between the inner cylinder and the outer cylinder and partitioned into a main liquid chamber and an auxiliary liquid chamber; an orifice passage for allowing the main liquid chamber and the auxiliary liquid chamber to communicate with each other; an electrorheological fluid filled in the liquid chamber; and a pair of electrode plates provided in the orifice passage and adapted to apply an electric field to the electrorheological fluid so as to change the viscosity of the electrorheological fluid. Hence, the electric field applied to the electrorheological fluid undergoes a change as the amount of electric current supplied to the electrode plates is changed, thereby changing the viscosity of the electrorheological fluid in the orifice passage.
REFERENCES:
patent: 4693456 (1987-09-01), Kanda
patent: 4728086 (1988-03-01), Irhiyama et al.
patent: 4865299 (1989-09-01), Goto
patent: 4909489 (1990-03-01), Doi
patent: 4971299 (1990-11-01), Doi
Kojima Hiroshi
Takano Kazuya
Bridgestone Corporation
Mojica Virna Lissi
Peters Jr. Joseph F.
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