Valve assembly

US5685332A · kind A · utility

Assignee

• Luk Fahrzeug-Hydraulik GmbH & Co. KG · DE

Inventors

• Gerhard Overdiek · Friedrichsdorf, DE
• Yuejin Gong · Bad Homburg vor der Höhe, DE
• Randolf Kortge · Usingen, DE
• Hans-Jurgen Lauth · Neu-Anspach, DE
• Van Doan Nguyen · Neu-Anspach, DE

Key dates

• Filing date: Apr 7, 1995
• Grant date: Nov 11, 1997
• Expiry date: Apr 7, 2015

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T137/7791
• WIPO field: Control
• WIPO sector: Instruments

Abstract

A valve assembly for controlling fluid flow to an actuator, including first and second throttles for controlling partial flows therethrough, which together form a full flow to the actuator and which function indepedently from each other and are formed each by a variable metering orifice, and a flow control valve for controlling fluid flow through the first throttle and including a valve spool and a spring for biasing the valve spool to a position of a maximum predetermined fluid flow through the first throttle.