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. 24, 1991
Filed:
May. 23, 1990
Toyoaki Sagawa, Kobe, JP;
Kawasaki Jukogyo Kabushiki Kaisha, Hyogo, JP;
Abstract
The present invention relates to relief valves, and is drawn to a relief valve that alleviates the rise in the relief pressure, by the compression of a main spring via a moving spring receiving member, due to the introduction of hydraulic pressure at the supply side into a fluid chamber at the rear of a movable spring member. Moreover, an adjustment spring to urge the moving body and to assist the main spring is provided within a fluid chamber, and the urging force of this adjustment spring can be adjusted by the operation of a changing member provided externally of the valve. Thus, the set pressure of the relief valve can be easily and readily changed, and also a fine adjustment of the set pressure can be effected.