Magnetically operated, multi-position, pressure control valve having integral metering orifice

US5934766A · kind A · utility

Assignee

• ITT MANUFACTURING ENTERPRISES LLC · US

Inventors

• Hans-Jörg Feigel · Rosbach, DE
• Andreas Klein · Bonn, DE
• Ulrich Neumann · Roßdorf, DE
• Lothar Schiel · Hofheim, DE

Key dates

• Filing date: Aug 25, 1997
• Grant date: Aug 10, 1999
• Expiry date: Aug 25, 2017

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T137/86919
• WIPO field: Transport
• WIPO sector: Mechanical engineering

Abstract

The present invention relates to a pressure control valve including a valve tappet which is axially movably arranged in the valve housing and, in a first switch position, provides a pressure fluid connection between a first pressure fluid port that opens into the valve housing and a second pressure fluid port that opens into the valve housing, wherein the valve tappet, in a second switch position, separates the pressure fluid connection between the first pressure fluid port and the second pressure fluid port and, in a third switch position, provides a pressure fluid connection between the second pressure fluid port and a third pressure fluid port, to which end a valve closure member which is axially slidable by the valve tappet is lifted from its valve seat. Another valve closure member is arranged in the valve housing so as to be displaceable in relation to the valve tappet, the valve closure member providing an unimpeded pressure fluid connection between the first pressure fluid port and the second pressure fluid port in a first operating position of the valve tappet and interrupting the pressure fluid connection between the first and the second pressure fluid port in another ope…