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:
Mar. 11, 2003
Filed:
Sep. 19, 2000
Masahiro Gotou, Anjo, JP;
Masaki Nakajima, Anjo, JP;
Yuji Nakai, Anjo, JP;
Hideyuki Nagai, Anjo, JP;
Daisuke Iwata, Anjo, JP;
Naohisa Momiyama, Anjo, JP;
Ken Shimizu, Anjo, JP;
Masahiro Ishikawa, Anjo, JP;
Tomohiro Sugiura, Anjo, JP;
Aisin AW Co., Ltd., , JP;
Abstract
The disclosed method produces a spline-grooved cylindrical member, e.g. torque converter front cover, including a cylindrical portion having a target wall thickness t from a plate blank having a plate thickness t An outer peripheral portion of a disc-shaped blank is plastically deformed by pressing it against a mandrel with the concave peripheral edge of a thickness-increasing roller, so that a thick wall portion, of a thickness greater than the plate thickness t of the blank, is formed in the cylindrical portion. The thick wall portion is then pressed against the mandrel by forming rollers to form spline grooves therein. Thus, the other portions of the product have a wall thickness which is not unnecessarily increased. In this manner, the wall thickness t of the cylindrical portion is not entirely dictated by the wall thickness t of the blank material. Thus, a cylindrical member resistant to high pressures acting on its axially-extending outer cylindrical portion can be produced with an optimal configuration.