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:
Sep. 01, 1987
Filed:
Sep. 18, 1985
Raymond G Rohlfing, Bartlesville, OK (US);
Phillips Petroleum Company, Bartlesville, OK (US);
Abstract
A catalyst mixing tank having an axially aligned cylindrical outlet conduit at the vessel bottom has an agitator on a shaft which terminates in a spiral configuration extending from the vessel and terminating within the outlet conduit thereby providing agitation within the outlet conduit. This catalyst mixing tank combined with a downstream ball-check feed valve with the feed valve having a diametrical clearance between ball and cylinder in a range of about 0.040 inch to the maximum clearance that precludes leaking between ball and cylinder and with control of the pressure differential across the ball-check feed valve provides a catalyst feed system particularly suitable for use with viscous material or material likely to bridge an opening.