Hydraulic control arrangement for at least two hydraulic consumers

US4150690A · kind A · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Joachim Heiser · Stuttgart, DE
• Wolfgang Bernhardt · Ditzingen, DE

Key dates

• Filing date: Nov 15, 1977
• Grant date: Apr 24, 1979
• Expiry date: Nov 15, 1997

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T137/87185
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

A hydraulic control arrangement for at least two hydraulic consumers, comprises two pressure compensated multiple position valves, respectively coordinated with the two consumers, and each including a pressure compensating control member which controls a control conduit coordinated with a reversing or unloading valve, which, depending on its position and those of the multiple position valves control flow of pressure fluid from a pump over the multiple position valves to the respective consumer or to a return conduit. This will assure that even during parallel operation of both consumers, the output of the pump will be adjusted to the consumer load in such a manner that energy losses are substantially avoided and control of the two consumers independent from each other is assured.