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:
Apr. 22, 2014
Filed:
Jun. 22, 2012
Daisuke Suzuki, Tsuchiura, JP;
Isao Oosato, Kasumigaura, JP;
Hirokazu Shimomura, Tsuchiura, JP;
Yoshinori Oowada, Tsuchiura, JP;
Daisuke Suzuki, Tsuchiura, JP;
Isao Oosato, Kasumigaura, JP;
Hirokazu Shimomura, Tsuchiura, JP;
Yoshinori Oowada, Tsuchiura, JP;
Hitachi Construction Machinery Co., Ltd., Tokyo, JP;
Abstract
A first cutoff valve is disposed in a main duct ranging between a control valve and a bottom chamber of a hydraulic cylinder. A sequence valve in the first cutoff valve is disposed along such a direction as to control outflow of a hydraulic fluid from the bottom chamber and the hydraulic pressure in a rod chamber is applied to the sequence valve as an external pilot pressure. A second cutoff valve is disposed in a main duct ranging between the control valve and the rod chamber of the hydraulic cylinder. A sequence valve in the second cutoff valve, disposed along such a direction as to control outflow of the hydraulic fluid from the rod chamber, and the hydraulic pressure in the rod chamber is applied to the sequence valve as an internal pilot pressure.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile