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:
Dec. 30, 1986
Filed:
Sep. 10, 1985
Raymond E Welterlin, Cary, NC (US);
Buehler Products, Inc., Raleigh, NC (US);
Abstract
An axial air gap sub-fractional horsepower brushless DC motor of the pancake type including a rotor assembly having a disc-like annular cylindrical permanent magnet supported on a shaft, the magnet having plural pairs of axially magnetized magnetic poles, and a stator formed of two identical stator component sub-assemblies located on opposite sides of the permanent magnet each including a thin disc-like annular backing plate of soft magnetic material, a plurality of coils supported thereon arranged in a circular path forming an odd number of coils, and a hall effect sensing element located along the circular path between one pair of circumferentially adjacent coils. A pair of generally cup shaped housing halves of similar configuration are assembled on opposite sides of the rotor and the pair of identical stator component sub-assemblies for encasing the rotor and said stator component sub-assemblies therein.