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:
Sep. 07, 2010
Filed:
May. 17, 2007
Gerhard Huber, Frankenhofen, DE;
Andreas Lechleiter, Hurlach, DE;
Klaus Schweiger, Steingaden, DE;
Hoerbiger Automatisierungstechnik Holding GmbH, Altenstadt, DE;
Abstract
A hydraulic circuit for actuation of a hydraulic working cylinder () having a one-sided piston rod (), comprising a reversible pump () whereby both sides of said pump are connected via a supply line () and a first two-way valve () to the tank () containing hydraulic medium and through releasable control check valves () to the working cylinder (). Both sides of the arrangement are further connected respectively to a hydraulic closeable valve () through a discharge line () and also to the tank () through a replenishing suction line () having a corresponding suction valve (). Each of said hydraulic closeable valves () is controlled by the pump () through a second two-way valve (). The discharge line (or) of one side of the working cylinder () is connected to the respective discharge line (or) and/or replenishing suction line (or) at the opposite side of the working cylinder (), whereby the connected lines are connected to the tank () through an arrangement () comprising a check valve () blocking in the direction of the tank () and well as a pressurizing valve () opening in the direction of the tank () to ensure through simple means the complete filling of the system with hydraulic medium even during manual operation.