Expanded – threaded – driven – headed – tool-deformed – or locked-thr – Externally threaded fastener element – e.g. – bolt – screw – etc. – Pilot end having means enhancing fastening or installation
Patent
1991-10-09
1993-04-06
Wilson, Neill R.
Expanded, threaded, driven, headed, tool-deformed, or locked-thr
Externally threaded fastener element, e.g., bolt, screw, etc.
Pilot end having means enhancing fastening or installation
411399, 411919, F16B 2300, F16B 2500
Patent
active
051998394
ABSTRACT:
A fastener screw includes a head portion, an elongated shank and a multiple-lead thread formed on the shank opposite the head portion. The head portion has a generally planar end surface having a polygonal drive recess therein. A generally longitudinal chip relief slot is formed along the thread and defines a longitudinal thread profile cutting edge. The underside of the head portion is defined by a generally concave annular surface having a plurality of outwardly projecting serrations formed about its periphery which burr into the workpiece and effect a self-locking action therewith as the screw is threaded into the workpiece.
REFERENCES:
patent: 378857 (1888-02-01), Woodford
patent: 586232 (1897-07-01), English
patent: 877131 (1908-01-01), Searelle
patent: 975285 (1910-11-01), Robertson
patent: 1084643 (1914-01-01), Lasater
patent: 1151861 (1915-08-01), Brumbeck
patent: 1175665 (1916-03-01), Sweet
patent: 2956470 (1960-10-01), Knohl
patent: 3044341 (1962-07-01), Stern
patent: 3124031 (1964-03-01), Knohl
patent: 3136205 (1964-06-01), Sngingh
patent: 3221588 (1965-12-01), Wieber
patent: 3463209 (1966-05-01), Podolsky
patent: 3903784 (1975-09-01), Dekker
patent: 3982464 (1976-09-01), Sygnator
patent: 4241638 (1980-12-01), Shimizu et al.
patent: 4655661 (1987-04-01), Brandt
patent: 4963654 (1987-09-01), Bettini
patent: 5020954 (1991-06-01), Dreger
Abbott-Interfast Corporation
Wilson Neill R.
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