Pressure regulating valve

US6418967B1 · kind B1 · utility

Assignee

• ZF FRIEDRICHSHAFEN AG · DE

Inventors

• Walter Frei · Friedrichshafen, DE
• Georg Gierer · Kreßbronn, DE
• Wolfgang Runge · Ravensburg, DE
• Hubert Remmlinger · Friedrichshafen, DE
• Karlheinz Mayr · Zell im Wiesental, DE
• Wolfgang Schmid · Regensburg, DE
• Thilo Schmidt · Meckenbeuren, DE

Key dates

• Filing date: Oct 7, 1999
• Grant date: Jul 16, 2002
• Expiry date: Oct 7, 2019

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T137/87217
• WIPO field: Control
• WIPO sector: Instruments

Abstract

Pressure regulating valve comprising a connection for a pressure line (P), a connection for a working line (A), a connection for an outlet line (T) communicating with the ambient pressure and at least two diaphragm stages with defined or definable drag, the two diaphragm stages being connected to each other in a variable manner and subject to mechanical or hydraulic action according to the principle of the hydraulic half bridge. The two variable diaphragm stages are provided as the inlet and outlet diaphragms of a pressure regulating chamber (7) and each has a sealing element, said sealing element (5) of the inlet diaphragm (3) is designed as ball, or calotte, ortruncated cone, or cylinder and/or the sealing element of the outlet diaphragm is designed as ball, or calotte, or truncated cone, or cylinder.