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:
Aug. 29, 1978
Filed:
Jan. 24, 1977
Oliver W Johnson, Chaska, MN (US);
Eaton Corporation, Cleveland, OH (US);
Abstract
A controller for fluid pressure operated devices such as power steering systems. The controller is of the type having a primary, rotatable valve member and a follow-up valve member and including a fluid meter having a metering member coupled to the follow-up valve member. The valving defines a central reference plane perpendicular to the axis of rotation of the valving, the primary valve member defining a pair of meter grooves oppositely and equally disposed about the plane. The follow-up valve defines pressure porting adjacent the plane and connected to the fluid inlet port. The primary valve member defines a pressure passage communicating with one of the meter grooves and extending a sufficient distance to communicate with the pressure porting for relative displacement of the valve members in one direction and another pressure passage communicating with the other meter groove and extending a sufficient distance to communicate with the pressure porting when the valve members are relatively displaced in the opposite direction.