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:
Feb. 15, 1983
Filed:
Jun. 12, 1981
Applicant:
Inventors:
Robert J Brown, Cookeville, TN (US);
Kenneth D Shepherd, Cookeville, TN (US);
Assignee:
The Duriron Company, Inc., Dayton, OH (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16K / ;
U.S. Cl.
CPC ...
137 74 ; 251306 ;
Abstract
A flow control valve with a valve closure element is provided having at least one annular resilient seat member and an annular flexible metal seat member positioned adjacent to it. The flexible metal seat is held in position by heat resistant gaskets and is biased against the resilient seat member. Upon the failure of the resilient seat to seal because of melting or deterioration caused by exposure to heat, the flexible metal seat member springs into position to provide a fire and heat resistant metal-to-metal seal with the valve closure element.