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. 08, 2002
Filed:
May. 16, 2000
Hitoshi Ohmori, Wako, JP;
Nobuhide Itoh, Hitachi, JP;
Susumu Shimizu, Tokyo, JP;
Shinji Ishii, Tokyo, JP;
Manabu Yamada, Tokyo, JP;
Kiyoshi Imai, Tokyo, JP;
Kineo Kojima, Tokyo, JP;
Riken, Saitama, JP;
Abstract
There is provided a conductive grinding wheel rotating centering on a vertical shaft center and including a horizontal working surface , and the grinding wheel comprises a conductive base member formed of an integrally molded flat plate, and a plurality of fan-shaped segments detachably attached to the base member to entirely constitute the annular working surface. Each segment comprises a base metal directly attached to the base member and a grinding wheel part formed on the surface of the base metal. Moreover, the grinding wheel part comprises a recessed groove for partitioning the working surface into a plurality of working areas , and an electrolytic fluid supply hole for directly supplying the electrolytic fluid to the respective working areas, so that the electrolytic fluid is supplied to the respective electrolytic fluid supply holes through the base member.