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:
Oct. 03, 1978
Filed:
Apr. 08, 1974
Orin C Mansel, Grand Rapids, MI (US);
Lescoa, Inc., Grand Rapids, MI (US);
Abstract
A fastener joint assembly and method for joining the crank arm plate to the pivot shaft in a vehicular windshield wiper crank arm assembly. A varying sized opening formed in the crank plate engages a corresponding knurl on the shaft. The opening is formed by providing a punch and an enlarged die member so that as the opening is pierced, the material at the lower portion of the opening at the enlarged die opening breaks out forming a larger diameter opening at the bottom of the plate. The root diameter of the knurled portion of the shaft corresponds generally to the smaller diameter opening in the plate. The larger diameter portion of the plate opening corresponds generally to the outer diameter of the knurl. As the shaft is driven into the plate at the smaller opening, the material surrounding the smaller opening flows into the larger diameter portion and the knurl forms a positive connection between the shaft and the plate.