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:
Apr. 05, 2005
Filed:
Jul. 02, 2004
Kunitake Matsushita, Shizuoka-ken, JP;
Takayuki Yamawaki, Shizuoka-ken, JP;
Toshihiko Nagata, Shizuoka-ken, JP;
Naoyuki Harada, Shizuoka-ken, JP;
Kunitake Matsushita, Shizuoka-ken, JP;
Takayuki Yamawaki, Shizuoka-ken, JP;
Toshihiko Nagata, Shizuoka-ken, JP;
Naoyuki Harada, Shizuoka-ken, JP;
Minebea Co., Ltd., , JP;
Abstract
A claw-pole type stepping motor comprises: a rotor which is shaped substantially cylindrical, and which has a rotary shaft at its radial center; and two stators which are shaped like a cup, each have at least one magnetic coil, are coupled to each other so as to rotatably house the rotor with their magnetic coils located respectively toward both axial end faces of the rotor, and which each have two pole tooth arrays magnetically connected to each other such that magnetic phase difference therebetween at tips of respective pole teeth is 180 degrees in terms of electrical angle, and in the motor thus structure, three pipes of aluminum go axially through the two stators so as to hold together the two stators.