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:
Jan. 20, 2009
Filed:
Aug. 03, 2005
Applicant:
Mitchell L. Whittaker, Mocksville, NC (US);
Inventor:
Mitchell L. Whittaker, Mocksville, NC (US);
Assignee:
Vulcan Materials Company, Birmingham, AL (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B02B 5/02 (2006.01); B03B 7/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
Crushed rock is produced by passing rocks through an early stage rock crusher. Crushed rocks that exit the early stage rock crusher are passed across a sizing device. Rocks failing to pass completely through the sizing device are recrushed in a later-stage rock crusher and then passed downwardly through a high-volume air stream which flows within the crusher transversely through the downwardly traveling crushed rocks and extracts fines therefrom prior to exiting of the crushed rocks from the crusher. The fines extracted by the air stream are at least 50% minus 50-mesh.