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:
Jul. 10, 2012
Filed:
Apr. 25, 2008
Applicants:
David A. Buck, Breaux Bridge, LA (US);
Mark Gravouia, Lafayette, LA (US);
Inventors:
David A. Buck, Breaux Bridge, LA (US);
Mark Gravouia, Lafayette, LA (US);
Assignee:
McCoy Corporation, Alberta, CA;
Primary Examiner:
Int. Cl.
CPC ...
F16H 59/04 (2006.01);
U.S. Cl.
CPC ...
Abstract
A power tong having a ring gear, a gear train, a motor and a gear shift mechanism. The gear shift mechanism further includes a linear actuator and a shift arm connect to the linear actuator. A drive gear is positioned on a drive shaft extending from the motor and this drive gear includes an upper and lower set of drive teeth having beveled top portions. The shift arm engages the drive gear between the upper and lower set of drive teeth and movement of the linear actuator causes the drive gear to engage one of at least two gears in the gear train.