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:
Feb. 26, 2013
Filed:
Nov. 04, 2008
Masakazu Soshi, Hadano, JP;
Haruki Ishiguro, Yamatokoriyama, JP;
Akihiro Mochizuki, Yamatokoriyama, JP;
Masakazu Soshi, Hadano, JP;
Haruki Ishiguro, Yamatokoriyama, JP;
Akihiro Mochizuki, Yamatokoriyama, JP;
Mori Seiki Co., Ltd., Yamatokoriyama-shi, Nara, JP;
Intelligent Manufacturing Systems International, San Francisco, CA (US);
Abstract
A machine-tool spindle device includes: a spindle; a front housing for rotatably supporting the spindle; a first drive motor having a first rotor installed securely on the spindle and a first stator installed securely within the front housing; a rear housing installed on a rear end side of the spindle in the front housing; a second drive motor having an annular second rotor which is disposed coaxially to the spindle near a rear end of the spindle and which is supported rotatably within the rear housing, and a second stator installed securely within the rear housing; a connecting mechanism for connecting the rear end of the spindle and the second rotor and releasing the connection; and a clamping mechanism, disposed within the attaching hole of the spindle and within the second rotor, for clamping a tool attached to the spindle.