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:
Jul. 22, 1997
Filed:
Feb. 28, 1996
Henry C Sangret, St. Clair Shores, MI (US);
TRW Inc., Lyndhurst, OH (US);
Abstract
A power steering control valve (10) includes inner and outer valve members (30 and 32) which are rotatable relative to each other to control fluid flow to and from a power steering motor. A spring assembly (50) interconnects the inner and outer valve members (30 and 32). The spring assembly (50) includes a torsion bar (64) and a body (66) of viscoelastic material. A housing (68) encloses the body (66) of viscoelastic material and a portion of the torsion bar. The body (66) of viscoelastic material is bonded to an inner side surface (88) of the housing (68) and to an outer side surface (82) of the torsion bar (64). The body (66) of viscoelastic material damps vibratory movement between the inner and outer valve members (30 and 32).