Dual-circuit pressure control valves

US4375304A · kind A · utility

Assignee

• ITT Industries · US

Inventors

• Bernd Schopper · Frankfurt, DE
• Derek Lowe · Königstein, DE
• Hans-Dieter Reinartz · Frankfurt am Main, DE
• Peter Tandler · Rockenhausen, DE

Key dates

• Filing date: Dec 30, 1980
• Grant date: Mar 1, 1983
• Expiry date: Dec 30, 2000

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T137/87056
• WIPO field: Transport
• WIPO sector: Mechanical engineering

Abstract

Dual circuit pressure control valves for brake system are known in which the control pistons are located parallel to each other with each control piston controlling a different one of two brake circuits. Both control pistons are loaded by a common preloading force. The known arrangement is complicated in its construction and has a large overall length. According to the present invention, the construction is simplified and the overall length is reduced by providing a torsion spring which provides the preloading force acting on the control pistons via stationarily supported swivelling levers.