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. 23, 1982
Filed:
Aug. 24, 1981
Applicant:
Inventor:
Russell S Shelton, Flanders, NJ (US);
Assignee:
Other;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E03B / ; F16K / ;
U.S. Cl.
CPC ...
137 61 ; 137 62 ; 137107 ; 13762526 ; 237 80 ; 251 43 ; 251325 ;
Abstract
A water or other fluid containing system is protected by a thermostatically controlled drain valve having input, output, drain and control ports. A slideable barrier within the valve selectively directs the flow within the valve between the ports. A small coupling orifice through the barrier and a particularly designed closure for the orifice are provided. A thermosensitive mechanism delivers pressure to the control port to open this closure when ambient temperature drops below a predetermined level. Equal static pressures developed by flow through the orifice in turn develop unequal forces on opposite sides of the barrier, to shift the barrier, redirecting the flow within the valve.