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. 23, 2004
Filed:
Feb. 06, 2001
Moe K. Barani, Radford, VA (US);
Ron Flanary, Blacksburg, VA (US);
Lee Snider, Christiansburg, VA (US);
Aspen Motion Technologies, Inc., Radford, VA (US);
Abstract
A brushless d.c. motor is integrated with a conveyor roller ( ) by placing a plurality of stator coils ( ) on a stationary shaft ( ) and securing a rotor ( ) with segments ( ) of permanent magnetic material to the inside of the conveyor roller ( ). In one embodiment the rotor ( ) is directly secured to the roller while in a second embodiment, the rotor ( ) is disposed inside of a cylindrical metal housing ( ) that is press fit inside of the roller. Commutation is provided by an external motor controller ( ) which is connected by conductors ( ) through a passageway ( ) in the shaft ( ) to a circuit board ( ), where sensors ( ) are mounted to sense rotor position for purposes of commutation of the stator coils ( ).