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:
May. 12, 2015
Filed:
Dec. 14, 2006
Applicant:
Vern a Hult, Calgary, CA;
Inventor:
Vern A Hult, Calgary, CA;
Assignee:
Oil Lift Technology Inc., Calgary, CA;
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F16D 59/00 (2006.01); F04C 15/00 (2006.01); E21B 43/12 (2006.01); F16D 51/48 (2006.01); F16D 65/22 (2006.01); F04C 2/107 (2006.01); F16D 121/16 (2012.01);
U.S. Cl.
CPC ...
F04C 15/0084 (2013.01); E21B 43/126 (2013.01); F04C 2/107 (2013.01); F16D 51/48 (2013.01); F16D 65/22 (2013.01); F16D 2121/16 (2013.01);
Abstract
A cam assisted centrifugal brake or clutch system provides increased mechanical advantage to improve the output torque relative to prior art devices such as leading brake shoes. The brake or clutch engagement is cammed radially outwardly to engage a brake housing in one direction and guided to a disengaged position in the other direction. Centrifugal forces retain the brake in the disengaged position. Embodiments of the present invention are applied as a backspin braking system that is incorporated into a drive head for a progressing cavity pump drive system.