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:
Oct. 28, 2014
Filed:
Oct. 21, 2009
Kazuo Maeda, Itami, JP;
Kouji Tominaga, Itami, JP;
Kazuo Maeda, Itami, JP;
Kouji Tominaga, Itami, JP;
Sumitomo Electric Hardmetal Corp., Hyogo, JP;
Abstract
A ball end mill in which a ball end cutting edge () has a convex shape in a tool rotation direction with respect to a line connecting a rotation center (O) and a radially outer end () of the ball end cutting edge (), in a front view of the tool. In the ball end mill, a rake angle (γ) of each portion of the ball end cutting edge () is set in a range from −10° to 0°, and the negative value of the rake angle (γ) is increased from a tip of the ball end cutting edge () and a radially outer end () of the ball end cutting edge () toward a middle point in the radial direction, and is maximized at approximately the middle point in the radial direction.