Thermostatic air valve

US3955760A · kind A · utility

Assignee

• Evans Products, Inc. · US

Inventors

• Michael R. Ridenour · Angola, US
• Jerry Zabonick · Coldwater, US

Key dates

• Filing date: May 5, 1975
• Grant date: May 11, 1976
• Expiry date: May 5, 1995

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T137/86582
• WIPO field: Control
• WIPO sector: Instruments

Abstract

A thermostatically operated air valve having a valve body, a valve chamber located within the body, a thermal sensor having a push rod extending therefrom into said valve chamber at a first end thereof, a reciprocal valve rod located in the valve chamber with an axial opening therein communicating with a supply of air under pressure, said axial opening of the valve rod communicating with a cylinder located at the second end of said valve chamber, a piston located within said cylinder and slidably mounted on the valve rod for rapid reciprocal movement thereon, an exhaust port in said cylinder having a retractable valving member seated in sealing relationship within said exhaust port, said push rod being in abutting relationship with said valve rod, said push rod extending at a predetermined actuation temperature to push said valve rod into contact with said valving member thereby sealing said axial opening in the valve rod and unseating said valving member from said exhaust port, whereby air in said cylinder is exhausted to the atmosphere and said piston is rapidly forced outwardly toward the second end of said valve chamber whereby communication between said air supply and an exit …