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:
Feb. 15, 1977
Filed:
Nov. 28, 1975
Applicant:
Inventor:
Edward S Orzel, Parma, OH (US);
Assignee:
The Weatherhead Company, Cleveland, OH (US);
Primary Examiner:
Int. Cl.
CPC ...
F15B / ; F15B / ;
U.S. Cl.
CPC ...
9139 / ; 91433 ; 91460 ;
Abstract
A motor vehicle fluid power circuit is provided with a constant displacement pump, a control valve, an open-center steering valve, and a hydraulic ratio type brake booster. The control valve includes a control spool which controls fluid flow between the pump and the brake booster and between the pump and the steering valve. A control spool modifying means modifies the operation of the control spool during initial actuation of the brake pedal to produce a large increase in brake booster pressure.