Wear-resistant valve apparatus

US6105931A · kind A · utility

Assignee

• WABCO GmbH · DE

Inventors

• Dieter Frank · Friesach, AT
• Sigfried Hofler · Hannover, DE
• Henning Kutzner · Elze, DE

Key dates

• Filing date: Jul 9, 1998
• Grant date: Aug 22, 2000
• Expiry date: Jul 9, 2018

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F16K31/0606
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

A wear-resistant valve, having at least two parts which move relative to each other, and which impact against each other, avoids damage to the contacting parts over long operating periods, with very little additional space requirement, and at low cost. At least one of the impact surfaces is covered with a thin coating. The material used for the coating is plastic, in particular, a fluorine-containing polymer material, such as polytetrafluoroethylene. The valve closing element, whose valve closing surface makes contact with a valve seat when the valve is actuated, is preferably provided with the coating. Valve arrangements which are actuated electromagnetically by a pulsing electrical signal are preferred areas of application for the present invention.