Expanded – threaded – driven – headed – tool-deformed – or locked-thr – Threaded fastener locked to a discreet structure – Nut – and means to engage substructure on its opposite faces...
Patent
1989-07-05
1990-08-14
Wilson, Neill R.
Expanded, threaded, driven, headed, tool-deformed, or locked-thr
Threaded fastener locked to a discreet structure
Nut, and means to engage substructure on its opposite faces...
411 15, 411 55, F16B 3704
Patent
active
049483145
ABSTRACT:
A screw grommet includes a flange having a screw insertion hole and a sack-like body integral with the flange. The sack-like body is inserted through a hole formed within an object to be fastened and has an inner axial screw guide channel communicating with the screw insertion hole for receiving and guiding an inserted screw, and a plurality of hill-like portions formed upon the outer periphery thereof and projecting axially while leaving a gap between the upper end of each hill-like portion and the lower surface of the flange. The gap serves as a fulcrum point about which the hill-like portions can in effect pivot in order to generate a wedging action upon the object being fastened when the screw is inserted within the screw guide channel.
REFERENCES:
patent: 3192821 (1965-07-01), Siebol
patent: 3200694 (1965-08-01), Rapata
patent: 3342098 (1967-09-01), Schuplin
patent: 3593612 (1971-07-01), Schulze
patent: 4082030 (1978-04-01), Erickson
Nifco Inc.
Wilson Neill R.
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