Hydrostatic drive system

US6256986A · kind A · utility

Assignee

• Linde GmbH · DE

Inventors

• Alfred Langen · Goldbach, DE
• Horst Deininger · Alzenau, DE

Key dates

• Filing date: Jul 22, 1999
• Grant date: Jul 10, 2001
• Expiry date: Jul 22, 2019

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F15B2211/75
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

A hydrostatic drive system with a pump and at least one consuming device that is connected to the pump can be actuated by a control valve. The control valve can be actuated as a function of an actuator that specifies a desired speed of movement and a direction of movement of the consuming device. The control valve in the center position, makes possible an unpressurized circulation of the pump. The control valve can be actuated electrically, and there is a sensor that measures the actual speed of movement of the consuming device. The control valve, the speed-of-movement sensor and the actuator are connected with an electronic control that controls the control valve as a function of the direction and speed of movement specified by the deflection of the actuator and of the actual speed of movement of the consuming device as measured by the speed-of-movement sensor. The speed-of-movement sensor may be a delivery flow sensor.