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:
Jun. 14, 1988
Filed:
Dec. 23, 1986
Makoto Horiuchi, Maruko, JP;
Yoshitaka Miyagawa, Wako, JP;
Nissin Kogyo Kabushiki Kaisha, Ueda, JP;
Honda Giken Kogyo Kabushiki Kaisha, Tokyo, JP;
Abstract
A hydraulic pressure source device for hydraulic boosters, comprising a hydraulic pump connected via a high-pressure oil passage to an input port of a hydraulic booster and a proportional reducing valve serving as a regulator interposed in the high-pressure oil passage, wherein the proportional reducing valve acts to reduce the pressure above a set level fed from the pump at certain reduction ratio and transmit it to the booster, the valve having a piston which is retractable beyond a valve-closing position to enlarge the volume of an output hydraulic chamber of the valve. Such retracting motion of the valve piston attenuates any impact which may be caused by kickback phenomenon occurring during operation of the booster.