Screws

Details Screws Screws

1991-05-22

1992-09-08

Lindsey, Rodney M.

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

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

Head driving structure

F16B 2300

Patent

active

051453029

ABSTRACT:
An angle-drive screw is provided which has a screwdriver recess in its head, the side-walls of the recess being undercut by the provision of a number of bores extending transversely through the screw head and connecting with the screwdriver recess. The screw may be formed by a casting or moulding process.

REFERENCES:
patent: 2331608 (1943-10-01), Hathorn
patent: 2556155 (1951-06-01), Stellin
patent: 2800829 (1957-07-01), West
patent: 3204266 (1965-09-01), Carter, Jr. et al.
patent: 3269250 (1966-08-01), Curtiss

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