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:
Dec. 17, 1985
Filed:
Feb. 09, 1984
Robert McDonald, Emmaus, PA (US);
Other;
Abstract
A tamper proof cartridge for use in nonelectric thermostatic valve sensors is disclosed. The usual cartridge includes a temperature sensor, operably connected to a push rod and an upper elongated stem by a spring. The upper stem terminates in an orifice sealer. The upper stem and sealer are of predetermined measurements to sealingly fit a valve orifice with a seat face. The improvement includes a lower extension of the upper stem extending below the orifice which terminates in an additional orifice sealer. The lower extension is of a predetermined length to insure that the additional orifice sealer permits flow of heat while the temperature sensor is operational and calls for the orifice to be open. The additional sealer is of sufficient width to seal the orifice. The disconnection of the sensor will cause the spring to urge the stem upward causing the additional orifice sealer to then sealingly fit the orifice, thereby restricting the heat from flowing through the valve.