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:
Aug. 25, 1992
Filed:
Aug. 30, 1990
Applicant:
Inventor:
Ralph M Forde, Richmond, CA (US);
Assignee:
Chevron Research & Technology Company, San Francisco, CA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B01D / ; F16K / ;
U.S. Cl.
CPC ...
2105121 ; 2105122 ; 554591 ; 209144 ; 209211 ; 137424 ; 137435 ; 137448 ;
Abstract
A buoyed flapper valve comprises a flapper which is capable of closing an exit of a dipleg or standpipe, which is also connected to a counterweight and a float. The float has sufficient buoyancy to as to overcome the weight of the counterweight when the valve is submerged in a bed of particulate material. The flapper valve is preferably employed as a dipleg check valve within a reactor, e.g., a riser reactor system, and can be used under a variety of operating conditions including both submerged and non-submerged operating conditions.