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, 1985
Filed:
Nov. 16, 1984
Burnell J Wollar, Barrington, IL (US);
Richard J Schwind, Akron, OH (US);
Phillips Plastics Corporation, Phillips, WI (US);
Abstract
An expansion rivet assembly comprises an expandable hollow plastic rivet and a plastic drive pin therefor. The rivet has a head and a shank which is insertable in aligned holes in workpieces to be joined. The drive pin has a head and a shank which is inserted in the rivet bore and adapted to be axially drawn into the rivet bore by a tool which causes the pin head to engage the insertion end of the rivet shank and effect outward expansion of the rivet shank wall and which also causes break-off of the superfluous projecting end of the pin shank at a break-away indentation formed in the pin shank. The pin shank has a groove near its head end which engages a reduced diameter bore portion in the rivet to temporarily hold the pin and rivet together prior to use. The pin shank also has serrations which engage another reduced bore portion in the rivet upon full pin insertion to hold the pin and rivet together permanently. The said other reduced bore portion is serrated to enhance engagement with the serrations.