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:
May. 24, 1977
Filed:
Aug. 29, 1975
Applicant:
Inventor:
John H Field, Norfolk, MA (US);
Assignee:
Sigma Instruments, Inc., Braintree, MA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02K / ;
U.S. Cl.
CPC ...
310162 ; 310156 ;
Abstract
Longitudinally extending radially-projecting and peripherally-spaced teeth on a stator member and rotor member of a synchronous electric motor, whose rotor member is magnetized by a permanent magnet, are skewed relative to each other. The overall peripheral distance of each tooth on one member is equal to or less than the space between the overall peripheral distances of the teeth on the other member. According to one embodiment the rotor teeth are skewed relative to the rotor axis and the stator teeth parallel thereto.
Field, John. (1977). Low noise synchronous motors (U.S. Patent No. 4025810). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4025810
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile