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
1989-05-30
1990-07-17
Gall, Lloyd A.
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...
411180, 411453, F16B 3700
Patent
active
049417886
ABSTRACT:
A screw threaded insert to be installed in for example thermoplastic material by ultrasonic vibrations applied to the insert is double-ended and comprises a main helically ribbed portion separated from a minor portion formed with teeth or projections aligned with helical ribs, and a pilot portion. The pilot portion is to locate the insert in a performed bore in the required orientation of insertion, the toothed portion displaces material in complementary grooves, so as to facilitate travel of the insert into the material and ensure good filling of the inter-rib spaces.
REFERENCES:
patent: 475407 (1892-05-01), Marsh
patent: 1022106 (1912-04-01), Murphy
patent: 3129444 (1964-04-01), Kahn
patent: 3130503 (1964-04-01), Rosan
patent: 3727254 (1973-04-01), Tildesley
patent: 4046181 (1977-09-01), Barnsdale
patent: 4818165 (1989-04-01), Shirai
Donovan Stephen
Gall Lloyd A.
P.S.M. International PLC
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