Spring devices – Resilient shock or vibration absorber – Including energy absorbing means or feature
Patent
1989-09-21
1991-10-01
Halvosa, George E. A.
Spring devices
Resilient shock or vibration absorber
Including energy absorbing means or feature
180312, 248562, 248636, F16F 1300
Patent
active
050526626
ABSTRACT:
An ERF (electrorheopectic fluid) filled engine mount has a main working chamber and first and second auxiliary chambers. An orifice passage structure provides fluid communication between the main and first auxiliary chambers. A first set of electrode plates are disposed in the orifice passage structure in a manner which permits the viscosity of the ERF to be selectively controlled. The first auxiliary chamber exhibits a relatively small expansive spring characteristic. A transfer port provides fluid communication between the main working chamber and the second auxiliary chamber. The second auxiliary chamber exhibits a relatively large expansive spring characteristic and functions to attenuate relatively high frequency vibration. An on/off type valve device is disposed in the transfer port.
REFERENCES:
patent: 4706945 (1987-11-01), Watanabe et al.
patent: 4720087 (1988-01-01), Duclos et al.
patent: 4861006 (1989-08-01), Takano et al.
patent: 4893797 (1990-01-01), Fol et al.
Halvosa George E. A.
Nissan Motor Company Ltd.
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