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:
Jun. 19, 1990
Filed:
Jun. 30, 1989
Mitsubishi Metal Corporation, Tokyo, JP;
Abstract
A ball end mill including an elongated body, a center insert, and a plurality of cutting inserts. The center insert and the cutting inserts are mounted on the forward end of the body. The center insert and each of the cutting inserts are adjacent to each other in such a manner that the center insert is located with a part thereof at the center. The center insert which is made of cemented carbide has cutting edges passing through the center axis. The cutting inserts are made of a super hard sintered compact. Each of the cutting inserts has a cutting edge aligned to the cutting edge of the center insert. The cutting edges of the cutting inserts and the center insert cooperate to draw a hemispherical path on rotation.