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:
Oct. 19, 1999
Filed:
Feb. 26, 1998
Applicant:
Inventors:
Katsuyosi Aiso, Shizuoka-ken, JP;
Sakasi Adati, Shizuoka-ken, JP;
Tosihiro Igarasi, Shizuoka-ken, JP;
Sin Tanoue, Shizuoka-ken, JP;
Satosi Kumamoto, Shizuoka-ken, JP;
Masanori Wakuda, Numazu, JP;
Assignee:
Primary Examiner:
Int. Cl.
CPC ...
F16H / ;
U.S. Cl.
CPC ...
74 8915 ; 7442 / ; 74459 ; 310 80 ; 310162 ;
Abstract
A shaft rotation driving apparatus for a machine tool having a main spindle for rotating a tool or a workpiece, comprises: a magnetic anisotropic rotor formed integral with the main spindle itself or with a rotary sleeve itself fitted to the main spindle; a stator disposed coaxially along an outer circumference of the magnetic anisotropic rotor; a field winding wound around the stator, for magnetizing the rotor in a predetermined direction; and an armature winding wound around the stator, for providing a rotative force to the rotor.