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:
May. 24, 1988
Filed:
Oct. 30, 1987
Delwin E Cobb, Macomb, IL (US);
Chien-Cheng J Shih, Irvine, CA (US);
Charles F Griswold, Brea, CA (US);
Union Oil Company of California, Los Angeles, CA (US);
Abstract
Apparatus for the mixing and cooling of hot, particulate matter, such as hot, retorted oil shale, comprises a plurality of enclosed, vertically spaced apart, converging vessels through which the material to be mixed and cooled is flowed. At least the lowermost vessel is configured for a packed bed flow of the material and has mounted therein, on a vertical drive shaft, a mixer blade assembly having a plurality of similar mixing blades which are upwardly inclined at an angle, A.sub.1, of between about 30.degree. and about 75.degree. and preferably within about .+-.15.degree. of the sidewall angle of the vessels. The blades are mounted so as to have an angle of attack, A.sub.2, relative to the rotational direction of travel, of between about 20.degree. and about 60.degree.. A constant angle of attack along each mixing blade is assured by making the angle, A.sub.3, between the blade leading edge and the blade base to be related to the blade inclination and attack angles in accordance with the relationship: