Expanded – threaded – driven – headed – tool-deformed – or locked-thr – Having separate expander means – Bulged by axially contracting ends
Patent
1984-11-16
1985-12-03
Dorner, Kenneth J.
Expanded, threaded, driven, headed, tool-deformed, or locked-thr
Having separate expander means
Bulged by axially contracting ends
411 43, 411 57, 411908, F16B 1306
Patent
active
045563519
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.
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Schwind Richard J.
Wollar Burnell J.
Dorner Kenneth J.
Kirby Thomas F.
Nilles James E.
Phillips Plastics Corporation
Wilson Neill
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