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:
Aug. 24, 1982
Filed:
Apr. 03, 1981
Nobuyuki Naganuma, Nagoya, JP;
Brother Kogyo Kabushiki Kaisha, Nagoya, JP;
Abstract
A rotary electromagnetic actuator of swing type capable of generating sufficient torque in a wide swing range. The actuator comprises a stator having plural stator poles and a rotor having rotor poles as many as the stator poles. Each of the stator poles is provided with plural concave curved surfaces which have respectively different radii from the rotary center of the rotor and are arranged in order of size of radius to form stairs ascending in the forward rotation direction of the rotor. On the contrary each of the rotor poles is in form of stairs descending in the same direction. The pitch of the stairs of the stator is longer than that of the rotor so that each couple of edges of both stairs may sequentially approach owing to the magnetism therebetween to each other for rotating the rotor step by step.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile