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. 07, 2014
Filed:
Nov. 13, 2009
Yoshikoto Yanase, Ritto, JP;
Masashi Ochi, Ritto, JP;
Yoshikoto Yanase, Ritto, JP;
Masashi Ochi, Ritto, JP;
Mitsubishi Heavy Industries, Ltd., Tokyo, JP;
Abstract
An object is to provide a barrel-shaped threaded tool for machining an internal gear which is capable of machining with high accuracy by appropriately setting a helix angle. To achieve the object, in a threaded grinding wheel () formed into a barrel shape having a diameter gradually decreasing from an axially intermediate portion thereof toward axially opposite end portions thereof so that the threaded grinding wheel () is meshed with a workpiece (W) with a crossed axes angle (Σ) therebetween during the machining of the workpiece (W), the helix angle is set in accordance with the length from the axially intermediate portion.