The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 14, 2015
Filed:
Aug. 05, 2011
Thomas Wolfgang Nehl, Shelby Township, MI (US);
Robert T. Foister, Rochester Hills, MI (US);
Frederic Bailly, Paris, FR;
Guy Tessier, Fontenay Sous Bois, FR;
Thomas Wolfgang Nehl, Shelby Township, MI (US);
Robert T. Foister, Rochester Hills, MI (US);
Frederic Bailly, Paris, FR;
Guy Tessier, Fontenay Sous Bois, FR;
Beijing West Industries Co., Ltd., Beijing, CN;
Abstract
A magneto-rheological damping assembly including a piston () defining a core (). A pair of spaced electromagnets () are disposed about the core () and are connected to a controller () for selectively generating a magnetic flux. A pair of permanent magnets () are disposed about the electromagnets () and a pole segment () is disposed therebetween. A main gap () extends through the piston () through which magneto-rheological fluid () is conveyed. Flux generated by the magnets controls the viscosity of the fluid in the main gap () to control the damping force of the assembly. The controller () defines an off operating state for cancelling the flux from the permanent magnets () across the main gap (). The core () and the pole segment () define a closed auxiliary gap () extending axially between the electromagnets () and radially between the core () and the internal pole segment () for preventing leakage of flux across the main gap () when the assembly is in the off operating state.