Invention Grant
- Patent Title: Fluid-filled type active vibration damping device
- Patent Title (中): 流体填充型主动减振装置
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Application No.: US13414866Application Date: 2012-03-08
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Publication No.: US09243680B2Publication Date: 2016-01-26
- Inventor: Hironori Koyama , Mutsumi Muraoka
- Applicant: Hironori Koyama , Mutsumi Muraoka
- Applicant Address: JP Aichi
- Assignee: SUMITOMO RIKO COMPANY LIMITED
- Current Assignee: SUMITOMO RIKO COMPANY LIMITED
- Current Assignee Address: JP Aichi
- Agency: Greenblum & Bernstein, P.L.C.
- Priority: JP2011-067093 20110325
- Main IPC: F16F13/28
- IPC: F16F13/28 ; F16F13/16 ; F16F13/26 ; F16F13/10

Abstract:
A fluid-filled type active vibration damping device including: a pressure-receiving chamber; an equilibrium chamber; an orifice passage permitting fluid flow between the two chambers; an oscillation member oscillated by an electromagnetic actuator; an intermediate chamber; and a pressure transmission passage through which pressure fluctuations produced in the intermediate chamber is applied to the pressure-receiving chamber. The intermediate chamber is provided independently of the equilibrium chamber. The pressure transmission passage comprises a filter orifice tuned to higher frequency than the orifice passage. A movable plate is provided for limiting an amount of fluid flow through the filter orifice. A leak hole is formed for continuously interconnecting the intermediate chamber and the pressure-receiving chamber, and a liquid column resonance frequency of the leak hole is set to not more than half of that of the filter orifice.
Public/Granted literature
- US20120242019A1 FLUID-FILLED TYPE ACTIVE VIBRATION DAMPING DEVICE Public/Granted day:2012-09-27
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