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:
Jul. 12, 2005
Filed:
Sep. 10, 2001
Masami Kondou, Osaka, JP;
Masami Kondou, Osaka, JP;
Yanmar Co., Ltd., Osaka, JP;
Abstract
A hydraulic circuit of an excavating and slewing working vehicle of two pump system, wherein a directional control valve for slewing and a directional control valve for arm are tandem-connected to the upstream side and downstream side of the delivery oil passage of a second hydraulic pump, respectively, a directional control valve for bucket are connected to the delivery oil passage of a first hydraulic pump, and then a bleed switching valve connected, through a check valve between the directional control valve for slewing and the directional control valve for arm and switched to connect to or disconnect from a tank on the upstream side of the check valve and the directional control valve for slewing are operated interlockingly with each other.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile