Drywall screw

Details Drywall screw Drywall screw

1998-05-13

1999-04-06

Saether, Flemming

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

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

Head driving structure

411399, 411403, F16B 2300

Patent

active

058908609

ABSTRACT:
The drywall screw includes an elongated shaft about an axis, a screw head at one end and threads about the shaft. The screw head has a recess having upper and lower portions. The upper portion is comprised of an upwardly flared thin-walled section having convex and concave interior and exterior surfaces, respectively. The lower portion includes a Phillips head slot for receiving a Phillips head driver. The recess in the head of the drywall screw and the outwardly flared head enables the screw to be driven into the drywall without tearing or loosening the paper overlying the drywall, while simultaneously providing a sufficient recess for receiving the drywall mud finishing compound.

REFERENCES:
patent: 135388 (1873-01-01), Tucker
patent: 350231 (1886-10-01), Brown
patent: 366158 (1887-07-01), Dow
patent: 2058197 (1936-10-01), West
patent: 2165425 (1939-07-01), Tomalis
patent: 3177755 (1965-04-01), Kahn
patent: 4228723 (1980-10-01), Cunningham
patent: 4355552 (1982-10-01), Gutshall
patent: 5199839 (1993-04-01), DeHaitre
patent: 5203657 (1993-04-01), Nagoshi et al.
patent: 5205694 (1993-04-01), Nagoshi et al.
patent: 5249882 (1993-10-01), Nagoshi et al.
patent: 5302058 (1994-04-01), Janusz et al.
patent: 5425407 (1995-06-01), Archuleta et al.
patent: 5641258 (1997-06-01), Sala

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