The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 07, 1989
Filed:
Mar. 01, 1988
Fred L Pirkel, Phoenixville, PA (US);
Ogontz Controls Company, Willow Grove, PA (US);
Abstract
In a freeze protection-valve, a wax actuator is situated in a heat-conductive housing to which heat is conducted from the liquid system being protected. The housing prevents the actuator from triggering the valve to its opened condition while the liquid system is hot, but permits a rapid response when the liquid system is cool. In a snap-action freeze protection valve, the actuator is carried by the valve stem, and heat is conducted from the valve body to the valve stem through a sleeve through which the valve stem slides. The actuator moves a cam within the valve stem which operates a ball-type latch. The latch holds the valve in the closed position until the actuator releases the latch. Also disclosed is a remote-controlled valve operating mechanism which uses an electrically heated wax actuator to effect valve closure. A cam and ball mechanism relieves the force on the actuator piston as soon as valve closure takes place, thereby preventing failure of the actuator due to prolonged application of high pressures and temperatures.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile