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:
Oct. 17, 2017
Filed:
Sep. 08, 2015
Applicant:
Riekor Corporation, Eden Prairie, MN (US);
Inventors:
Ryan Heiraas, Savage, MN (US);
Timothy A. Erhart, Chanhassen, MN (US);
John Russell Kingery, Eden Prairie, MN (US);
Assignee:
Reikor Corporation, Eden Prairie, MN (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16H 33/06 (2006.01); F16H 1/28 (2006.01); F16H 35/10 (2006.01);
U.S. Cl.
CPC ...
F16H 33/06 (2013.01); F16H 1/28 (2013.01); F16H 35/10 (2013.01);
Abstract
A gearbox includes a planetary gearset, an input shaft coupled to a sun gear of the planetary gearset, and an output shaft coupled to planet gears of the planetary gearset via a carrier. A constant torsion spring is coupled to a ring gear of the planetary gearset. The constant torsion spring is capable of preventing the ring gear from moving when a torque at the output shaft is below a threshold. The ring gear winds the constant torsion spring in response to the torque exceeding the threshold.