U.S. patents available from 1976 to present.
U.S. patent applications available from 2005 to present.

Vibration damping device

Patent 5472069 Issued on December 5, 1995. Estimated Expiration Date: Icon_subject October 27, 2013. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Patent References

Spring element with hydraulic damping
Patent #: 4773632
Issued on: 09/27/1988
Inventor: Hartel

Electrically controlled viscous elastic spring
Patent #: 4869476
Issued on: 09/26/1989
Inventor: Shtarkman

Electronically controlled vibration damper for mounting automotive internal combustion engines and the like
Patent #: 4893800
Issued on: 01/16/1990
Inventor: Tabata

Tension responsive fishing apparatus
Patent #: 5248113
Issued on: 09/28/1993
Inventor: Daniels

Magnetorheological fluid dampers Patent #: 5277281
Issued on: 01/11/1994
Inventor: Carlson, et al.

Inventor

Application

No. 152636 filed on 10/27/1993

US Classes:

188/267.1, Electroviscous or electrorheological fluid267/140.14With electronic or magnetic control

Examiners

Primary: Oberleitner, Robert J.
Assistant: Muratori, Alfred

Attorney, Agent or Firm

Foreign Patent References

  • 4258543 JP 09/13/1992

International Class

F16F 009/53

Abstract

There is provided a vibration damping device comprising a flexible body fing an enclosed chamber, a plurality of electrically conductive members located within the chamber and spaced from each other along a common axis, the common axis being parallel to an inside surface of the flexible body. A fluid fills the chamber and is in contact with the flexible body inside surface and exposed surfaces of the conductive members, the fluid being resistant to shear stress when activated by an electric potential. The conductive members are arranged in the flexible body so as to provide an open region bounded at least in part by the conductive members and extending through the flexible body. Wires connected to an electrical power source are provided for electrically energizing the conductive members to create an electric field between each pair of neighboring conductive members and to create an electric field in the open region, thereby activating the fluid in the open region and between each pair of conductive members.

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