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:
Oct. 03, 1989
Filed:
Nov. 09, 1987
Applicant:
Inventor:
Mark S Ross, Lawrenceville, NJ (US);
Assignee:
Mobil Oil Corporation, New York, NY (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F27B / ; F27B / ;
U.S. Cl.
CPC ...
422145 ; 1375276 ; 1375278 ; 422114 ; 422144 ;
Abstract
A flapper valve for sealing the cyclone diplegs on a fluid catalytic cracking unit has conical sealing surfaces provided between the movable valve body and the valve seat on the bottom of the cyclone dipleg. In addition, a retaining ring around the movable valve body retains catalyst on the valve body when the valve is in its horizontal, closed position to improve sealing.