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:
Jul. 01, 1997
Filed:
Apr. 26, 1996
Yukio Yamaguchi, Okazaki, JP;
Masaaki Enya, Toyohashi, JP;
Takahiro Yamazaki, Nishio, JP;
Tatsuo Miura, Kariya, JP;
Nippondenso Co., Ltd., Kariya, JP;
Abstract
A method of producing, in a workpiece such as a spiral member of a scroll element, a curved groove for receiving a mechanical seal by using a milling cutter, especially, an end mill. A relative feed in a given direction 'A' is provided between the milling cutter and the work, and the milling cutter rotating in a predetermined direction 'B' about an axis of rotation thereof is set so that the milling cutter provides an inner side wall of the curved groove with respect to a center of curvature of the curved groove with an up milling in which the direction 'B' is directed against the direction 'A', and that the milling cutter provides an outer side wall of the curved groove confronting the inner side wall with a down milling in which the direction 'B' is directed toward the direction 'A', in order to suppress formation of coarse and rough surface on both the inner and outer side wall of the curved groove. Thus, the width of the curved groove can be constantly accurate over an entire length of the groove.