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:
Jan. 28, 1986
Filed:
Feb. 10, 1984
Kazuyoshi Fujioka, Sagamihara, JP;
Nissan Motor Co., Ltd., Yokohama, JP;
Abstract
A cylindrical clutch drum of a clutch for an automatic transmission is formed with a plurality of spline grooves by press forming. Each spline grooves consists of a series of groove portions arranged, end to end, in a line. The width and depth of each spline groove are increased in a stepwise manner, one groove portion after another, toward one groove end. Each groove portion is made by half-blanking with a die having a width corresponding to the width of the groove portion and a length corresponding to the length of the groove portion. Instead of the spline grooves, the clutch drum may be formed with axially extending openings made by blanking. In this case, the width of each opening is increased in a stepwise manner.