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:
Nov. 20, 2018
Filed:
Aug. 18, 2016
Applicant:
Harnischfeger Technologies, Inc., Wilmington, DE (US);
Inventor:
Samuel F. Haworth, Oak Creek, WI (US);
Assignee:
Joy Global Surface Mining Inc, Milwaukee, WI (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
E21B 21/16 (2006.01); E21B 36/00 (2006.01); F04C 18/16 (2006.01); F04C 29/00 (2006.01); E21B 41/00 (2006.01); E21B 7/02 (2006.01);
U.S. Cl.
CPC ...
E21B 21/16 (2013.01); E21B 7/02 (2013.01); E21B 36/00 (2013.01); E21B 41/0078 (2013.01); F04C 18/16 (2013.01); F04C 29/0007 (2013.01);
Abstract
A blasthole drill rig includes a base, a drill tower extending from the base, a drill pipe coupled to the drill tower, a drill bit coupled to a lower end of the drill pipe, an air compressor that directs compressed air through the drill pipe, and a heating element that heats the compressed air.