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. 28, 1990
Filed:
Aug. 28, 1990
Robert V Hendershot, Evanston, IL (US);
Candy Mfg. Co., Inc., Evanston, IL (US);
Abstract
An electro-mechanical device for accurately retarding or advancing the timing or rotational phase relationship of machine components, such as a pair of shafts, either while the components are in motion or stationary. The device embodies a motor controlled cycloidal gear reducer operable to generate a rotational differential or relative movement between a pair of rotatable gears. Each shaft is coupled to one of the gears for movement therewith. The stator of the motor rotates with one of the gears and the rotor thereof, when energized, rotates relative to the stator and drives a generator for effecting differential rotation of the two gears and thus the two machine components.