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:
Mar. 05, 2002
Filed:
Oct. 22, 1999
Shinichi Murayama, Fukushima, JP;
Takahiro Nakamura, Fukui, JP;
Sodick Co., Ltd., Kanagawa, JP;
Abstract
A locking device ( ) for an indexable spindle ( ) to which a tool electrode is attached, comprises a brake disk ( ) fixed to the spindle, an annular upper brake member ( ) movable in the axial direction of the spindle between a first position and a second position closer to the brake disk than the first position, a annular lower brake member ( ) movable in the axial direction of the spindle between a third position and a fourth position closer to the brake disk than the third position, an upper disk ( ) arranged facing upper surface of the brake disk across a minimum gap when the upper brake member is at the first position, a lower disk ( ) arranged facing lower surface of the brake disk across a minimum gap when the lower brake member is at the third position, and drive means for moving the upper and lower brake members in the axial direction of the spindle. When the upper brake member is at the second position and the lower brake member is at the fourth position, the upper and lower brake members press the upper and lower disks against the brake disk to lock the spindle.