Electrohydraulic control circuit

US9719530B2 · kind B2 · utility

Assignee

• TTControl GmbH · AT

Inventors

• Marcus Simon Specks · Sankt Ingbert, DE
• Marcus Karl Pfeiffer · Völklingen, DE
• Stephan Grün · Heusweiler, DE
• Reiner Vierkotten · Oberhausen, DE
• Joseph Schnittker · Dortmund, DE
• Andreas Lehmann · Schlieren, CH
• Wolfgang Tebeek · Marl, DE
• Wolfgang Kemmetmüller · Wien, AT
• Johannes Henikl · Essen, DE
• Andreas Kugi · Wien, AT

Key dates

• Filing date: Apr 9, 2014
• Grant date: Aug 1, 2017
• Expiry date: Jul 12, 2034

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F15B2211/8757
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

An electrohydraulic control circuit for driving a hydraulically actuated actuating element (5, 6), by means of which a segment (5.3) 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 (2.4), which is connected to hydraulic working lines of the actuating element (5.6) for the drive thereof, and leak-free check valves (2.5, 2.6) provided in the working lines of the actuating element (5.6), which valves are arranged on the actuating element (5.6) or on the segment (5.3) associated with this actuating element (5.6) and can be released for the normal operation of the actuating element (5.6), wherein the release of the check valves (2.5, 2.6) is driven by an electronic control unit (ECU) separate from the first valve (2.4) and the check valves (2.5, 2.6).