Expanded – threaded – driven – headed – tool-deformed – or locked-thr – Externally threaded fastener element – e.g. – bolt – screw – etc. – Thread or shank structure
Patent
1996-08-12
1999-01-26
Saether, Flemming
Expanded, threaded, driven, headed, tool-deformed, or locked-thr
Externally threaded fastener element, e.g., bolt, screw, etc.
Thread or shank structure
411412, 411386, F16B 3504, F16B 3300
Patent
active
058631674
ABSTRACT:
The present invention supplies a drilling screw which can fix a gypsum board to a thin steel plate by utilizing an impact-type air driven screw fastener and execution method for fixing efficiently the gypsum board to the thin steel plate. The drilling screw 11 comprising the parallel thread part 13 and the smaller diameter parallel thread part 15 which are connected through the taper thread part 14. The height of thread crest of the smaller diameter parallel thread part 15 is as small as about 0.1 mm. The taper bit 16 is formed at the fore end of the smaller diameter parallel thread part 15. When the drilling screw 11 is hammered into the gypsum board and the C-type steel plate structural material with the impact-type air driven screw fastener, the smaller diameter parallel thread part 15 is inserted through the steel plate. Since the smaller diameter parallel thread part 15 has so small diameter, the steel plate is seldom deformed. The small-sized thread crest provided at the smaller parallel thread part 15 generates driving force in the inserting direction of the screw upon its rotation so that the parallel thread part 13 is screwed into the steel plate, resulting in fixation of the gypsum board and the C-type steel plate structural material.
REFERENCES:
patent: 288798 (1883-11-01), Harvey
patent: 413968 (1889-10-01), Rogers
patent: 1827615 (1931-10-01), Rosenberg
patent: 1980093 (1934-11-01), Rosenberg
patent: 3208328 (1965-09-01), Myers
patent: 3942405 (1976-03-01), Wagner
patent: 4653244 (1987-03-01), Ferrell
Fattibene Arthur T.
Fattibene Paul A.
Max Co.,Ltd
Saether Flemming
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