Variable gas leak rate valve

US3981480A · kind A · utility

Assignee

• The United States of America as represented by the United States Energy Research and Development Administration · US

Inventors

• Errol P. EerNisse · Salt Lake City, US
• Gary Peterson · Albuquerque, US

Key dates

• Filing date: Dec 19, 1974
• Grant date: Sep 21, 1976
• Expiry date: Dec 19, 1994

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F16K31/004
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

A variable gas leak rate valve which utilizes a poled piezoelectric element to control opening and closing of the valve. The gas flow may be around a cylindrical rod with a tubular piezoelectric member encircling the rod for seating thereagainst to block passage of gas and for reopening thereof upon application of suitable electrical fields.