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:
Apr. 15, 2008
Filed:
Sep. 18, 2002
Applicant:
Dong-teak Chung, Seongnam-si, Kyeonggi-do, KR;
Inventor:
Dong-Teak Chung, Seongnam-si, Kyeonggi-do, KR;
Assignee:
Other;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B21D 51/16 (2006.01);
U.S. Cl.
CPC ...
Abstract
A method of making ceramic sphere, a pair of rollers and a core drill with a stopper are employed. The rotating core drill in cooperation with the rollers machines a cylinder-shaped ceramic core to make a ceramic sphere. The rotating core drill continuously machines the ceramic sphere in cooperation with the rollers to obtain a ceramic real sphere, while the stopper of the core drill prevents the ceramic sphere from moving upward.