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:
Sep. 07, 1976
Filed:
Sep. 24, 1975
Naoki Ohara, Toyota, JA;
Aisin Seiki Kabushiki Kaisha, Toyota, JA;
Abstract
A hydraulic brake booster for use with an open center-type power steering system includes, upon the application of the vehicle brakes, a relief valve piston mechanism for setting the fluid pressure greater than the fluid pressure being previously circulated through the power steering system and a spool valve assembly for selectively admitting the high fluid pressure to a power piston device for the brakes, so that the load upon a pump, under non-application conditions of the brakes, will be reduced whereby it will be easy to accumulate the fluid pressure for the brakes in case of an emergency due to the fact that the fluid pressure set by the relief valve piston can be greater than the pressure required for charging gas within the accumulator.