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:
Jun. 01, 1999
Filed:
May. 01, 1998
Applicant:
Inventors:
Bruce J Dover, Lockport, NY (US);
Edward V McCormick, Churchville, NY (US);
Assignee:
Harper International Corp., , US;
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F27B / ; F27B / ;
U.S. Cl.
CPC ...
432107 ; 432103 ; 432105 ; 432112 ; 432117 ; 34131 ; 34132 ;
Abstract
A direct heat rotary calciner and method for providing improved thermal treatment of particulate material comprises a rotary tube having a plurality of screened apertures along the length thereof. Material to be treated is passed through the rotating tube and contacted during passage with a cross-flow of heated gases entering and leaving through the screened apertures. At least a portion of the internal wall of the tube may be provided with spiral flights to aid in the conveyance of the particulate material through the rotating tube.