Control arrangement for at least two hydraulic consumers fed by at least one pump

US4739617A · kind A · utility

Assignee

• Mannesmann Rexroth AG · DE

Inventors

• Norbert Kreth · Minden, DE
• Martin Schmitt · Heidelberg, DE
• Armin Stellwagen · Lohr am Main, DE

Key dates

• Filing date: Oct 22, 1986
• Grant date: Apr 26, 1988
• Expiry date: Oct 22, 2006

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F15B2211/76
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

A pump supplies via in each case a directional valve a plurality of consumers with fluid, a pressure balance for load-independent division of the pump displacement being provided between each branch line branching off the pump delivery line and the directional valve. In a pressure regulating valve common to all pressure balances a control pressure is generated from the pressure difference between the pump pressure and the respective highest consumer pressure and is applied to all the pressure balances so that when the pump power is inadequate a proportional quantity reduction at all consumers is achieved.