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:
Jul. 29, 1997
Filed:
Apr. 15, 1996
Hiroshi Shohara, Toyohashi, JP;
Haruo Suzuki, Nukata-gun, JP;
Nippondenso Co., Ltd., Kariya, JP;
Abstract
A ring-shaped flange is molded at one end of a cylindrically-shaped body in a flange molding process. In an edge surface molding process performed after the flange molding process, a cylindrically-shaped body thinner than a hot rolled steel plate, a truncated cone-shaped connecting portion extending in an axial direction from the body, and a smallest diameter portion thinner than the body at the other end of the body are molded. Next, in a slotting process, a slotting punch is driven in from the slanting surface of the connected portion to form the other guide-molded portion, and in a trimming process, the flange is trimmed off in order to remove the unnecessary volume to form a poly V-pulley from the work. In the above-described processes, even if the sash-shaped hot rolled steel plate has an uneven thickness, uneven thicknesses or fluctuations in precision of the hot rolled steel plate can be corrected in the middle of the press process, so that the rotation of the poly V-pulley can be prevented from fluctuating.