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:
Dec. 03, 1991
Filed:
Feb. 07, 1990
Ryohei Yabuno, Toyota, JP;
Shin Takeda, Aichi, JP;
Aisin Seiki Kabushiki Kaisha, Kariya, JP;
Abstract
In a method of making a poly-V grooved pulley from a circular flat plate of sheet metal of a predetermined thickness, the central portion of the parent flat plate is pressed to form a cup-shaped blank integral with a circular flat peripheral flange of the same thickness as that of the parent flat plate, the cup-shaped blank having a predetermined thickness thinner than that of the parent flat plate. The cup-shaped blank is pressed to form a hub wall, and the circular flat peripheral flange is drawn to form a cylindrical pulley flange wall. At the final stage, the cylindrical pulley flange wall is formed in its exterior periphery with a plurality of V-shaped grooves for a poly-V belt.