Safety valve assembly

US4345620A · kind A · utility

Assignee

• Technomatic AG · CH

Inventors

• Erich Ruchser · Weingarten, DE
• Helmut Ott · Stuttgart, DE
• Günter Baldauf · Rommelshausen, DE

Key dates

• Filing date: Jul 17, 1980
• Grant date: Aug 24, 1982
• Expiry date: Jul 17, 2000

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T137/87225
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

A safety valve assembly for pressurized medium-operated devices has a housing with a supply inlet, a consumer outlet, and a return outlet, two valves operating in parallel with one another, and each having a working piston and a valve member guided in chambers of the housing and operative for establishing and interrupting the communication between the inlet and outlets via two cross-passages wherein a pressure sensing element is provided having two opposite sides each communicating with a respective one of the cross-passages and displaceable in the event of malfunctions from its inoperative to its operative position so as to act in the latter position upon an actuating member arranged to turn off a consumer in response to the displacement of the pressure sensing element to its operative position.