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:
Dec. 28, 2004
Filed:
Jun. 10, 2003
Applicant:
Inventors:
Masakazu Uesugi, Yamanashi-ken, JP;
Masahiro Tsunofuri, Yamanashi-ken, JP;
Shotaro Mizobuchi, Yamanashi-ken, JP;
Assignee:
THK Co., Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16C 3/206 ; F16C 3/700 ;
U.S. Cl.
CPC ...
F16C 3/206 ; F16C 3/700 ;
Abstract
Disclosed is a spindle device endowed with a sufficient load capacity for bending moment and capable of reducing power loss and heat generation of the main shaft attributable to the radial dynamic pressure bearing. In this spindle device, the rotation of the spindle rotor is supported by a pair of radial dynamic pressure bearing portions, between which there is provided a first cooling chamber so as to circumferentially surround the spindle rotor, atmosphere outside the housing being introduced into the first cooling chamber.