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:
Mar. 29, 2016
Filed:
Nov. 05, 2012
Applicant:
Warrior Rig Ltd., Calgary, CA;
Inventor:
Allan Stewart Richardson, The Woodlands, TX (US);
Assignee:
Warrior Rig Ltd., Calgary, CA;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16H 7/00 (2006.01); F16H 7/08 (2006.01); E21B 19/00 (2006.01); E21B 19/16 (2006.01);
U.S. Cl.
CPC ...
E21B 19/164 (2013.01);
Abstract
A power transmission for a slewing interface includes a rotor rotatable relative to a stator about a slewing axis, at least one drive sprocket mounted on the stator adjacent the rotor, a first drive cooperating with the at least one drive sprocket, at least two satellite sprockets on the rotor and spaced around the rotor, at least one drive belt mounted around the drive sprockets and around the satellite sprockets in driving engagement collectively therewith, power is delivered continuously from the first drive to at least one of the satellite sprockets at all times during rotation of the rotor about the slewing axis.