Patent · US Active

Electrohydraulic control circuit for a large manipulator

US10900244B2 · kind B2 · utility

0Cited by

3References

20Claims

0Family size

Assignee

Schwing GmbH · DE

Inventors

Reiner Vierkotten · Oberhausen, DE
Johannes Henikl · Essen, DE
Andreas Lehmann · Schlieren, CH
Peter Przebinda · Datteln, DE
Karl-Heinz Schwedhelm · Castrop-Rauxel, DE

Key dates

Filing date	Apr 10, 2017
Grant date	Jan 26, 2021
Priority date	—
Expiry date	Jun 6, 2037

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF15B2211/8757
WIPO fieldMechanical elements
WIPO sectorMechanical engineering

Abstract

An electrohydraulic control circuit includes a hydraulically-operated drive assembly and an emergency valve. The hydraulically-operated drive assembly includes an electrically-actuated proportional valve and hydraulic operating lines. The proportional valve is connected to the hydraulic operating lines for actuation of the drive assembly in a normal operation mode. The proportional valve is also connected to a pressure supply line and to a return line. The emergency valve is connected to the hydraulic operating lines for actuation of the drive assembly in an emergency operation mode. In the emergency operation mode, the emergency valve is actuated via an emergency operating unit.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.