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:
Dec. 17, 2013
Filed:
Mar. 15, 2011
Takashi Miki, Kobe, JP;
Takashi Miki, Kobe, JP;
Nabtesco Corporation, Tokyo, JP;
Abstract
A stack valveincludes a boom direction switching valve(first direction switching valve) connected to an unloading pathand a service valve(second direction switching valve) connected to the unloading pathat the downstream of the boom direction switching valve. At changeover positionsandat which the unloading pathon the upstream side is connected to one of the supply and discharge pathsandand the other one of the supply and discharge pathsandis connected to the unloading pathon the downstream side, the boom direction switching valveis connected to a boom valve tank return pathwhich connects the other one of the supply and discharge pathsandwith the tank path