Driving screw

Details Driving screw Driving screw

1997-11-28

1999-03-16

Saether, Flemming

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

Externally threaded fastener element, e.g., bolt, screw, etc.

Thread or shank structure

411426, 411386, F16B 3504

Patent

active

058821627

ABSTRACT:
A drive screw comprises: a head portion; a shank; and a helical thread portion extending along almost all the length of the shank, wherein an outside diameter of the drive screw including the thread portion being formed so as to be reduced from a portion close to the head portion in at least three stages.

REFERENCES:
patent: 1980093 (1934-11-01), Rosenberg
patent: 2382019 (1945-08-01), Miller
patent: 3177755 (1965-04-01), Kahn
patent: 3682507 (1972-08-01), Waud
patent: 3752030 (1973-08-01), Steurer
patent: 3942405 (1976-03-01), Wagner
patent: 4179976 (1979-12-01), Sygnator
patent: 5252016 (1993-10-01), Schmid
patent: 5536127 (1996-07-01), Pennig

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