Spring devices – Resilient shock or vibration absorber – Including energy absorbing means or feature
Reexamination Certificate
2007-05-01
2007-05-01
Kramer, Devon (Department: 3683)
Spring devices
Resilient shock or vibration absorber
Including energy absorbing means or feature
C267S141200
Reexamination Certificate
active
11006714
ABSTRACT:
A fluid-filled vibration damping device including: an elastic body connecting a first and a second mounting member, defining a pressure receiving chamber undergoing pressure fluctuation during input of vibration; an equilibrium chamber defined by a flexible layer for permitting its volume change; a first orifice passage connecting the pressure receiving chamber and equilibrium chamber; a medial chamber disposed between the pressure receiving chamber and equilibrium chamber; a second orifice connecting the pressure receiving and medial chambers, being tuned to a frequency higher than does the first orifice passage; a pressure fluctuation transmitting mechanism disposed between the pressure receiving and medial chambers for a restricted pressure transmission between chambers by restrictive displacement of its movable member; and a pressure regulating rubber plate defining the medial chamber, regulating pressure fluctuation in the medial chamber by its elastic deformation.
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Maeno Hajime
Muramatsu Atsushi
Kramer Devon
Oliff & Berridg,e PLC
Tokai Rubber Industries Ltd.
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