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:
Jul. 19, 1983
Filed:
Mar. 17, 1981
Scott W Binegar, Houston, TX (US);
Hamid J Saka, Houston, TX (US);
ACF Industries, Incorporated, New York, NY (US);
Abstract
A fire-safe valve structure for a valve of the type having a valve body with a flow passage (18, 20) therethrough and a valve chamber which houses a valve element (70) for opening and closing the flow passage, the valve chamber becoming sealed off from the flow passage in the open and closed conditions. An annular metallic seat (110) with a port (200), which extends between its inner and outer annular surfaces (186, 188) and so located as to communicate the valve chamber with the flow passage, is disposed in an annular seat pocket (28) formed around the flow passage (20) on the upstream side of the valve. The seat pocket (28) opens to the valve chamber (50) and the metallic seat (110) is provided with sealing means (196) for sealing with the valve element (70) in the open or closed condition. A relief plug (202) of a selected temperature degradable material is positioned within the port (200) so that when the chamber is sealed off and the plug (202 ) is exposed to the environment within the valve chamber (50), the plug (202) will evacuate the port (200) at the degradation temperature of the plug material or will be ejected from the port (200) at a preselected pressure differential between the valve chamber (50) and flow passage (20), whichever first occurs. The pressure build-up in the valve chamber (50) which results from rising temperature is then relieved by communication of the chamber through the port (200) to the upstream flow passage (20).