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:
Apr. 08, 1986
Filed:
Jul. 25, 1985
Applicant:
Inventor:
Gaylon L Dighton, Baton Rouge, LA (US);
Assignee:
The Dow Chemical Company, Midland, MI (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F16K / ;
U.S. Cl.
CPC ...
137597 ; 137315 ; 13761411 ; 137866 ;
Abstract
The invention is a valve assembly designed for relieving pressure on a process structure, such as a reactor vessel or a pipeline. The valve structure consists of two separate pressure relief units, and each unit includes a pressure relief valve that is positioned between an inlet valve and an outlet valve. A single mechanical actuator means is used to open and close both pairs of valves, so that when one pair of inlet and outlet valves is fully closed, the other pair of inlet and outlet valves is fully open.