Braking pressure control unit for a dual circuit brake system

US4227746A · kind A · utility

Assignee

• ITT Industries · US

Inventors

• Bernd Schopper · Frankfurt, DE
• Peter Tandler · Rockenhausen, DE

Key dates

• Filing date: Dec 1, 1978
• Grant date: Oct 14, 1980
• Expiry date: Dec 1, 1998

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T137/2496
• WIPO field: Transport
• WIPO sector: Mechanical engineering

Abstract

The braking pressure control unit for a dual circuit brake system comprises a housing with two closure members arranged therein coaxially and in tandem. In their rest position, the closure members are held spaced apart from associated valve seats by a control force. The control force acts directly on a first of the two closure members which in turn bears against a second of the two closure members provided both are in the open positions. At least one closure member consists of a shaft element having one end in an operative relationship with the adjacent end of the other closure member and a closure element in a slidably sealed relationship with the outer surface of the shaft element, the closure element being displaced between limits of the shaft element. A weak closure spring biases the closure element toward its associated valve seat.