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:
Nov. 16, 2004
Filed:
Aug. 26, 2002
Tatsuji Saigo, Chiba, JP;
Masaharu Sugiyama, Chiba, JP;
Hideo Iwadate, Chiba, JP;
Hiroyuki Kihara, Chiba, JP;
Seiko Instruments Inc., Chiba, JP;
Abstract
A multistage fine-hole machining device has lap stations for lapping an inner surface defining a through-hole of a workpiece. Each of the lap stations has a passing unit for passing wire through the through-hole of the workpiece, a supply unit for supplying a polishing material to the wire, and a sliding unit for effecting relative sliding movement between the workpiece and the wire while the wire is passed through the through-hole of the workpiece and is supplied with the polishing material to thereby lap the inner surface of the workpiece with the polishing material and enlarge the diameter of the through-hole. A transfer device successively transfers the workpiece to each of the lap stations to lap the inner surface of the workpiece at each of the lap stations during the lapping operation for successively enlarging the diameter of the through-hole to a preselected diameter.