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:
Aug. 21, 2018
Filed:
Aug. 21, 2015
Applicant:
Caterpillar Inc., Peoria, IL (US);
Inventors:
Richard Griffith Marsh, Lugoff, SC (US);
Gabriel John Ellicott, Peoria Heights, IL (US);
Michael H. Noble, Peoria, IL (US);
Assignee:
Caterpillar Inc., Deerfield, IL (US);
Primary Examiner:
Int. Cl.
CPC ...
E21B 19/08 (2006.01); E21B 7/02 (2006.01);
U.S. Cl.
CPC ...
E21B 19/08 (2013.01); E21B 7/02 (2013.01);
Abstract
A drilling drive system is provided. The drilling drive system has a mast having a longitudinal axis and a surface extending along the longitudinal axis. A bar is fixed to the surface of the mast and extends along the longitudinal axis. A plurality of rungs is disposed along the length of the bar, and a floating chain is disposed around the mast. A drive sprocket has a plurality of teeth that engage the plurality of rungs and the floating chain.