Hoerbiger Automatisierungstechnik Holding Gmbh

Andreas Lechleiter

Gerhard Huber

Klaus Schweiger

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.

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Hurlach, Germany

Andreas Lechleiter