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:
Nov. 03, 1998
Filed:
Sep. 15, 1997
Applicant:
Inventor:
Mamoru Ohkubo, Neyagawa, JP;
Assignee:
Exedy Corporation, Neyagawa, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B21D / ; B21D / ; B21D / ;
U.S. Cl.
CPC ...
72213 ; 72207 ; 72208 ; 2989332 ;
Abstract
A gear teeth forming apparatus is used for forming a plurality of gear teeth on an outer circumferential wall of a pressed drum. The apparatus includes a die and a plurality of rotational rollers. A plurality of convex/concave portions are formed in the axial direction on the die. The die has an outer circumferential surface on which the outer circumferential wall of the pressed drum is fitted. Also, the die is movable in the axial direction. A plurality of the rotational rollers are insertable partially into grooves of the die and are rotatable along the grooves.