Screw with improved head design

Details Screw with improved head design Screw with improved head design

1993-09-09

1994-10-25

Lindsey, Rodney M.

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

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

Head driving structure

411403, F16B 3506

Patent

active

053583680

ABSTRACT:
A screw having a driving socket capable of receiving a square socket (Robertson) type driver, a cross-recess (Phillips) type screw driver, and a flat blade driver.

REFERENCES:
patent: 1910182 (1933-05-01), Robertson
patent: 2082748 (1937-06-01), Brown
patent: 2173707 (1939-09-01), Brown
patent: 2289561 (1942-07-01), West
patent: 2359898 (1944-10-01), Clark
patent: 2395476 (1946-02-01), Givnan
patent: 2556155 (1951-06-01), Stellin
patent: 3177506 (1965-04-01), Vellier
patent: 3269250 (1966-08-01), Curtiss
patent: 3304561 (1967-02-01), Ellsworth
patent: 3481243 (1969-12-01), Gatz
patent: 5020954 (1991-06-01), Dreger

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