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:
Aug. 03, 2004
Filed:
Jan. 10, 2003
Applicant:
Inventors:
Wun-Chang Shih, Hsinchu, TW;
Ching-Hsing Huang, Hsinchu, TW;
Yu-Hsiu Chang, Hsinchu, TW;
Hung-Kuang Hsu, Hsinchu, TW;
Assignee:
Industrial Technology Research Institute, Hsinchu Hsien, TW;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F18C 3/206 ;
U.S. Cl.
CPC ...
F18C 3/206 ;
Abstract
A composite fluid dynamic bearing and its manufacturing method is disclosed. By machining a plurality of bearings independently, the grooves of each bearing have uniform slopes. Then the method of the invention combines the bearings, which have different slope of the grooves, to form a bearing module having pressure-generating grooves. In this way the precision of the machining grooves of bearings can be improved.