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:
Jan. 25, 2011
Filed:
Sep. 16, 2009
Hiroki Ikuta, Komaki, JP;
Hiroki Tazawa, Konan, JP;
Yoshikuni Ohta, Kitanagoya, JP;
Jojiro Kimura, Ogaki, JP;
Hiroki Ikuta, Komaki, JP;
Hiroki Tazawa, Konan, JP;
Yoshikuni Ohta, Kitanagoya, JP;
Jojiro Kimura, Ogaki, JP;
Yamazaki Mazak Corporation, Aichi pref., JP;
Abstract
The invention provides an improved seal structure of cutting fluid supplied to a spindle of a milling spindle. The milling spindlecomprises a spindlesupported within a housing via a bearing, and a drawbarhaving a through coolant passage. The cutting fluid Cpassing through the rotary jointandis sent to the through coolant passage, but a portion thereof is collected in a drain chamber. A rotation memberis attached to a rear end portion of the spindle, which is equipped with a labyrinth devicehaving a lip seal member. An air supply memberhas two air seal membersand, and air Ais sent toward the labyrinth device, by which an air seal is formed.