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. 03, 2019
Filed:
May. 30, 2016
Kobe Steel, Ltd., Hyogo, JP;
Toru Eguchi, Kobe, JP;
Yoshiharu Nishida, Kobe, JP;
Naofumi Kanei, Takasago, JP;
Hideto Fujiwara, Takasago, JP;
Kobe Steel, Ltd., Hyogo, JP;
Abstract
Provided is a hydraulic drive device, wherein the hydraulic drive device is provided with: a cylinder (); a rod (); a piston (); a hydraulic pump (); a tank (); a valve () that can be switched between a positive state of connecting the hydraulic pump () and a head chamber () and connecting a rod chamber () and the tank (), and a negative state of connecting the hydraulic pump () and the rod chamber () and connecting the head chamber () and the tank (); and a confluence channel () at which, when the valve () is in the positive state, at least a portion of hydraulic oil going from the rod chamber () to the tank () is merged into hydraulic oil going from the hydraulic pump () to the head chamber ().