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:
Oct. 17, 2006
Filed:
Sep. 09, 2004
Masahiro Funato, Hirakata, JP;
Toshikazu Okada, Osaka, JP;
Shigeru Yamamoto, Hirakata, JP;
Tomohiro Nakagawa, Hirakata, JP;
Masahiro Funato, Hirakata, JP;
Toshikazu Okada, Osaka, JP;
Shigeru Yamamoto, Hirakata, JP;
Tomohiro Nakagawa, Hirakata, JP;
Komatsu Ltd., Tokyo, JP;
Abstract
A variable relief valve is inserted in a hydraulic piping for connecting a first pump/motor to a second pump/motor. The variable relief valve is controlled such that when shifting the transmission from forward to reverse or vice versa, a relief set pressure of the variable relief valve is reduced in response to switching of a forward/reverse shifting clutch mechanism and after completion of the switching of the forward/reverse shifting clutch mechanism, the relief set value is increased.