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:
May. 29, 2012
Filed:
Apr. 09, 2008
Shigeru Shinohara, Oyama, JP;
Shigeru Shinohara, Oyama, JP;
Komatsu Ltd., Tokyo, JP;
Abstract
A hydraulic vehicle provided with a running-system hydraulic unitthat includes a hydraulic pumpbeing configured to be driven by an engine E, a hydraulic motorbeing configured to be driven by pressure oil discharged from the hydraulic pump, and a pair of running-system oil passagesandconnected between the hydraulic pumpand the hydraulic motorfor forming a closed circuit. The hydraulic vehicle is configured to be driven by the hydraulic motorfor running. The hydraulic vehicle includes: a backup pumpbeing configured to be driven by the engine E; a backup control valve, a backup oil passage, a high-pressure selection valvethat are configured to allow pressure oil discharged from the backup pumpto flow to one of the running-system oil passages that is higher in pressure than the other.