F - Mech Eng,Light,Heat,Weapons – 16 – B
Patent
F - Mech Eng,Light,Heat,Weapons
16
B
85/36
F16B 13/02 (2006.01) F16B 19/00 (2006.01) F16B 21/08 (2006.01)
Patent
CA 1183707
IMPROVED PLASTIC DRIVE FASTENER Abstract of the Disclosure Disclosed is a one piece plastic drive fastener including a head and a shank with the shank having an axis and comprising an elongate body portion having a generally polygonal cross-section and providing a plurality of radially outwardly facing substantially flat surfaces. A first plurality of integral resilient independent wings extend radially outwardly from at least one of the flat surfaces at axially spaced intervals. The junctures of the first plurality of wings along the at least one of the surfaces is each along a respective straight line forming a bend line for flexure of the first wings during introduction of the fastener into a complementarily apertured workpiece. A second plurality of integral resilient independent wings extend from and are positioned in axially spaced relation along at least one of the other of the surfaces and are angularly disposed so as to incline in the direction of the head. Each of the second wings has a thickened section formed at its juncture, whereby each thickened section coacts with its respective second wing to define a bend line along which each second wing flexes which bend line is spaced radially from the respective surface to which each of the second wings is attached.
377634
Chisholm Lisa E.
Nelson John F.
Illinois Tool Works Inc.
Meredith & Finlayson
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