ALEXANDRIA, Va., Oct. 28 -- United States Patent no. 12,447,542, issued on Oct. 21, was assigned to OSG Corp. (Toyokawa, Japan).
"Method for chamfering toothed gear" was invented by Koji Tsutsuyama (Toyokawa, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A method for chamfering toothed gears which enables lengthening of a life of a tool is provided. The chamfering method is for sequentially chamfering the line intersection portions 23 between tooth flanks 21 and end faces 22 of teeth 2 with end cutting edges 122. A pitch Pb of the end cutting edges 122 is set to five times a pitch Pa of the teeth 2. As a result, at a chamfering step of chamfering line intersection portions 23 of the teeth 2, a circumf...