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:
Jun. 12, 1990
Filed:
Apr. 14, 1989
Daniel J Shramo, Rocky River, OH (US);
Adalet/Scott Fetzer Company, Westlake, OH (US);
Abstract
A large air gap electric motor has a permanent magnet rotor with a large air gap to a slotless, less, cylindrical core surrounding the rotor. A winding of at least one phase is disposed in the large air gap. This winding is disposed on a coil form wihch is metallized on one face to reflect heat of the winding away from the rotor. The winding is formed from a plurality of pancake coils with a plurality of pancake coils around the periphery in each layer and a plurality of layers in a radial dimension. Each pancake coil in successive layers becomes progressively larger to substantially fill the radial air gap. The surrounding slotless core is made from a spirally wound flux conductor, which may be a flat ribbon of rectangular cross section.