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. 04, 2018
Filed:
Jan. 15, 2014
Kayaba Industry Co., Ltd., Tokyo, JP;
Takayuki Ogawa, Kanagawa, JP;
KYB Corporation, Tokyo, JP;
Abstract
An actuator unit includes a rod side chamber and a piston side chamber defined in the cylinder by a piston; a tank; a direction control valve configured to allow a working fluid discharged from the pump to be supplied selectively to the rod side chamber and the piston side chamber; a first control passage that communicates the rod side chamber with the tank; a second control passage that communicates the piston side chamber with the tank; a first variable relief valve provided on the first control passage, the first variable relief valve being configured to have a varied valve opening pressure; a second variable relief valve provided on the second control passage, the second variable relief valve configured to have a varied valve opening pressure; and a center passage that communicates the tank with the interior of the cylinder.