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. 06, 1999
Filed:
Sep. 16, 1997
Applicant:
Inventor:
Charles D Syverson, North Mankato, MN (US);
Assignee:
Motion Systems, L.C.L.L.C., White Lake, WI (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B65G / ;
U.S. Cl.
CPC ...
198788 ; 198784 ;
Abstract
A drive roller for a conveyor is rotated by a brushless D.C. motor without any intervening gear reducer. The drove roller has a laminated metal stator with at least three windings external to the stator core. The stator is fixed to a rigid axially extending shaft which supports a roller tube and a permanent magnet rotor on bearings. The rotor is fixed to the roller tube and closely spaced from the stator. A variable frequency power supply controls the induced magnetic field in the stator to control the rotational speed of the drive roller.