Hydraulic control with delay

US4179887A · kind A · utility

Assignee

• Mannesmann AG · DE

Inventors

• Gerhard Ridder · Witten, DE
• Wilhelm Schafer · Witten, DE

Key dates

• Filing date: Apr 24, 1978
• Grant date: Dec 25, 1979
• Expiry date: Apr 24, 1998

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T137/2559
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

Two hydraulic brakes or clutches being primary users, are alternately, delayedly, hydraulically energized from a constant volumetric flow rate pump feeding also a secondary user via a pressure controller with a differential piston operated by feedback ducts from the primary users via a throttle valve. The latter valve is bypassed through a check valve for undelayed de-energization. A selector valve is disposed between the branch point for the secondary user and upstream as to energizing fluid from the feedback connection to the primary user. The pressure controller is described further as to several structural details.