Hydac Filtertechnik Gmbh

Hydac Mobilhydraulik Gmbh

Ttcontrol Gmbh

Marcus Karl Pfeiffer

Peter Bruck

Andreas Kugi

Sascha Alexander Biwersi

Johannes Henikl

Reiner Vierkotten

Frank Bauer

Marcus Simon Specks

Andreas Lehmann

Christoph Stoenner

Wolfgang Kemmetmüller

Stephan Grün

Marcus Hettiger

Joseph Schnittker

Christian Stauch

Wolfgang Tebeek

Philippe Vande Kerckhove

Erik Lautner

Christoph STÖNNER

Erik Lauter

A valve arrangement for supplying pressure medium to a hydraulic consumer has two utility ports (A, B) for fluid connection to the consumer and has a first control valve. The first control valve () has a first intake () via which a first intake flow from the first utility port (A) to the consumer () is controllable, has a first return control orifice () via which a first return flow () from the consumer () via the second utility port (B) is controllable simultaneously with the first intake (), has a second intake () via which a second intake flow from the second utility port (B) to the consumer () is controllable, and having a second return control orifice (), via which a second return flow () from the consumer () via the first utility port (A) is controllable simultaneously with the second intake (). A second control valve () has an intake control orifice () used to control the respective intake () of the first control valve ().

Valve arrangement for pressure medium supply of a hydraulic consumer

A control device, in particular for hydraulically controlling components of mobile working machines, has a pressure supply connection (P) and a tank or return connection (T) in addition to two user connections (A, B). Control and/or regulating valves () are connected between the individual connections (P, T, A, B). Two control lines (C, Z) can control at least one of the control and/or regulating valves. A modular-type functional block () is connected to at least one of the control lines (C, Z).

Control apparatus

An electrohydraulic control circuit for driving a hydraulically actuated actuating element (), by means of which a segment () of a manipulator, in particular of a large manipulator for truck-mounted concrete pumps, can be adjusted in terms of its orientation, wherein there are provided an electrically driven first valve (), which is connected to hydraulic working lines of the actuating element () for the drive thereof, and leak-free check valves () provided in the working lines of the actuating element (), which valves are arranged on the actuating element () or on the segment () associated with this actuating element () and can be released for the normal operation of the actuating element (), wherein the release of the check valves () is driven by an electronic control unit (ECU) separate from the first valve () and the check valves ().

Electrohydraulic control circuit

Growing community of inventors

Ramstein-Miesenbach, Germany

Marcus Karl Pfeiffer