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. 11, 2000
Filed:
Feb. 06, 1997
Applicant:
Inventors:
Yuzuru Suzuki, Shizuoka, JP;
Hirohito Nakamata, Shizuoka, JP;
Assignee:
Minebea Co., Ltd, Nagano, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H02K / ;
U.S. Cl.
CPC ...
310 80 ; 310 14 ; 310 43 ; 310 45 ;
Abstract
A motor structure having an output shaft with a male screw part mating with a female screw part provided on a rotor rotated by electromagnetic interaction to move the output shaft in an axial direction. The female screw is formed of PPS resin, and the male screw part is formed of metal with a silicon nitride surface layer.