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. 02, 1981
Filed:
Jan. 03, 1980
Toshiaki Tsukimoto, Zama, JP;
Toshiba Kikai Kabushiki Kaisha, Tokyo, JP;
Abstract
A control valve operating as a combined relief and make-up valve for use in hydraulic apparatus comprises a valve housing provided with a blind hole, a valve seat tightly engaged with the inlet of the blind hole, a cylindrical hollow make-up poppet slidably inserted into the blind hole, a cylindrical relief poppet slidably inserted within the make-up poppet, a screw member adjustably engaged with the inner surface of the end of the make-up poppet, a coil spring disposed between the screw member and the relief poppet, and a balance piston having one end tightly inserted into the inner cylindrical hole of the relief poppet. The valve housing is provided with a first opening connected to an external hydraulic supply device and a second opening connected to a hydraulic source. The first and second openings are communicated with each other in response to differential pressure of an operating fluid so as to operate the control valve as a relief valve or a make-up valve.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile