Plastic drive fastener

Details Plastic drive fastener Plastic drive fastener

1982-07-30

1988-03-01

Wilson, Neill

Expanded, threaded, driven, headed, tool-deformed, or locked-thr

Headed fastener element

Having resilient securing structure on shank

411456, 411913, F16B 1900

Patent

active

047282380

ABSTRACT:
An improved one piece drive fastener having a head and a shank, the shank including a generally non-circular cross-section presenting a plurality of generally flat, axially extending surfaces. Each of the flat surfaces on the shank carry a plurality of axially spaced flexible resilient wing elements; the wings being flexed along the straight line connection with the flat surfaces. Certain wings extending from and positioned in spaced relation along at least one said surfaces being angularly disposed so as to tilt in the direction of said head and further including means formed integrally with each of said certain wings to substantially increase the force required for removal of said fastener from a cooperating aperture as compared to the force required to introduce said fastener into said aperture. Said fastener with its flat surfaces permitting the manufacture of said fastener in a simple two-plate mold design.

REFERENCES:
patent: 1264683 (1918-04-01), Ricci
patent: 1373875 (1921-04-01), Fallon
patent: 1971726 (1934-08-01), Norwood
patent: 3483787 (1969-12-01), Saunders
patent: 3810279 (1979-05-01), Swick et al.
patent: 4270328 (1981-06-01), Page et al.
patent: 4287657 (1981-09-01), Andre et al.

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