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:
Dec. 21, 1976
Filed:
Jul. 10, 1974
Frederick John Adams, Campton, E;
Cam Gears Limited, Hitchin, E;
Abstract
A hydraulic power assisted steering system includes a source of pressure fluid fed to a power assist motor. Control of the steering assistance pressure is provided by a valve having two valve elements which are relatively rotatable away from a centered position, subject to restraint imposed by an elastic torque rod. The pressure fluid source has its output branched, one branch supplying the steering assistance motor through and subject to the control of the rotatable valve, and the second branch supplying detent means adapted to increasingly resist relative rotation of the two valve elements in response to increases in pressure of the fluid source. The fluid source pressure increases with increasing relative rotation of the valve elements away from their centered position. Increasing fluid source pressure ultimately effects interlocking of the valve elements when the source pressure reaches a predetermined value. At that point, the torque bar, in effect, ceases being sensitive to increasing torque applied by the driver.