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. 06, 1997
Filed:
Nov. 17, 1994
Hirobumi Satomi, Kashiwa, JP;
Takao Iwasa, Kashiwa, JP;
Oriental Motor Co., Ltd., Tokyo, JP;
Abstract
A combined linear-rotary stepping motor shares stator iron plates and mover iron cores for a linear motor portion and a rotary motor portion without lengthening the length in the shaft direction. The combined linear-rotary stepping motor includes a stator 1 having a stator iron core 10 provided with a plurality of salient poles 11, 12, 13, . . . composed of the salient poles having a plurality of first stator teeth 24 formed in inner peripheral surfaces thereof in the direction of a shaft 21 and the salient poles having a plurality of second stator teeth 25 formed in inner peripheral surfaces thereof in the circumferential direction and a mover 2 having mover iron cores 22a and 22b supported within the stator 1 movably in the shaft direction and rotatably and provided with a plurality of mover teeth 26 formed in outer peripheral surfaces thereof at an equal pitch in the shaft direction and the circumferential direction in opposing relation to the first and second stator teeth 24, 25. The stator iron core 10 is formed by laminating stator iron plates 30 while rotating the plates by a predetermined angle so that the first stator teeth 24 are formed in the inner peripheral surfaces of the specified salient poles in the shaft direction.