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:
May. 31, 2016
Filed:
Mar. 05, 2012
Yoshimitsu Nagashima, Narita, JP;
Yoshiyuki Kobayashi, Narita, JP;
Haruhisa Higasayama, Toyota, JP;
Seiji Niwa, Toyota, JP;
Yoshimitsu Nagashima, Narita, JP;
Yoshiyuki Kobayashi, Narita, JP;
Haruhisa Higasayama, Toyota, JP;
Seiji Niwa, Toyota, JP;
Mitsubishi Hitachi Tool Engineering, Ltd., Tokyo, JP;
Abstract
An indexable ball end mill comprising first to third inserts having arcuate cutting edges detachably attached with first to third screws to first to third seats in a semispherical tip end portion of a tool body; a first threaded hole for the first screw slantingly penetrating a slit-shaped first seat; the first insert having an inclined hole to avoid interference between the first screw and the second and third screws; a hole of the first insert and the first screw having at least partially finished surfaces, so that when the first screw penetrates the first insert attached to the first seat, the first insert is precisely positioned by tight engagement of both finished surfaces.