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:
Sep. 21, 1993
Filed:
Oct. 08, 1992
M.H. Center Limited, Tokyo, JP;
Aida Engineering, Ltd., Kanagawa, JP;
Abstract
The present invention relates to a differential pinion for automobiles or the like, a metal mold for plastic working the differential pinion, and a method for plastic working with the above metal mold. And particularly the differential pinion of the present invention is provided with an end relief section which is effective to reduce a noise and has a continuous fiber flow from a tooth face to the end relief section providing a high pitting resistance. The metal mold for plastic working the differential pinion of the present invention can provide the internal pressure working area of the die in a position deep below the open end by a required distance therefrom, thereby providing the metal mold with higher rigidity and strength. Further, in the plastic working method of the present invention, it is very easy to position the punch under pressure stress in the axial direction.