Spring devices – Resilient shock or vibration absorber – Including energy absorbing means or feature
Patent
1992-07-06
1995-07-18
Seidel, Richard K.
Spring devices
Resilient shock or vibration absorber
Including energy absorbing means or feature
267219, 248559, 248562, 248636, F16F 916, F16M 500
Patent
active
054334217
ABSTRACT:
A vibration isolating apparatus in which a vibrating body, which is disposed within a pressure-receiving liquid chamber and is connected to a mounting member such that a gap is formed between an inner wall surface of the pressure-receiving liquid chamber and the vibrating body, is disposed. An elongated limiting passage is formed in the vibrating body so as to penetrate therethrough. The limiting passage communicates the pressure-receiving liquid chamber and an auxiliary liquid chamber provided within the mounting member. When there is low-frequency vibration, there is liquid-column resonance of a liquid within the limiting passage. However, because the limiting passage is elongated, the liquid-column resonance of the liquid therein is large, and a high loss factor is obtained. Therefore, the low-frequency vibration is reliably absorbed. When there is high-frequency vibration, there is liquid-column resonance of the liquid in a vicinity of the gap. A dynamic spring constant decreases, and the high-frequency vibration is reliably absorbed.
REFERENCES:
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patent: 4757982 (1988-07-01), Andra et al.
patent: 4770396 (1988-09-01), Jouade
patent: 4826126 (1989-05-01), Katayama et al.
patent: 4836512 (1989-06-01), Lun
patent: 4997168 (1991-03-01), Kato
patent: 5170998 (1992-12-01), Muramatsu
Bridgestone Corporation
Seidel Richard K.
Woods Raymond D.
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