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. 01, 2010
Filed:
Feb. 07, 2006
Shinichi Itou, Kawagoe, JP;
Shinichi Itou, Kawagoe, JP;
Komatsu Ltd., Tokyo, JP;
Komatsu Utility Co., Ltd., Tokyo, JP;
Abstract
A lineis provided with a linecommunicating the lineand a hydraulic oil tank. The lineis provided with a throttleto construct a throttle-provided line. When air is trapped between the hydraulic oil tankand the hydraulic pump, the hydraulic pumpis driven to discharge the air from the throttle-provided lineto the hydraulic oil tank, thereby removing the air in the hydraulic circuit. When the air is removed, resistance caused by the throttleis increased, which makes hydraulic oil flow from a pilot pumpto a PPC valve. Since the throttle-provided linerealizes air removal with a simple structure, a hydraulic cylindercan be supplied with the air-removed hydraulic oil from an initial stage, thereby enhancing responsiveness of the hydraulic cylinder