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:
Sep. 25, 2001
Filed:
Oct. 17, 2000
Applicant:
Inventor:
Takao Date, Shizuoka-ken, JP;
Assignee:
Toshiba Kikai Kabushiki Kaisha, Kawasaki, JP;
Primary Examiner:
Int. Cl.
CPC ...
F16C 3/700 ;
U.S. Cl.
CPC ...
F16C 3/700 ;
Abstract
Two angular contact ball bearings (,) are arranged in a backside combination manner for supporting a machine tool spindle (,), a spindle head body (,) serves as a bearing case for holding the angular bearings, an inner collar (,) is disposed between inner races (,) of the angular bearings, an outer collar (,) is disposed between outer races (,) of the angular bearings, the outer collar is set to be longer in an axial direction than the inner collar to provide preloads to the angular bearings, the outer collar is made of a material having a smaller thermal expansion coefficient than the bearing case, the machine tool spindle and the inner collar.