Wood screw and method for making same

Details Wood screw and method for making same Wood screw and method for making same

1986-11-19

1989-03-28

Wilson, Neill

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

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

Resiliently flexible

411421, 411425, F16B 3500

Patent

active

048159093

ABSTRACT:
A wood screw has a resilient shaft carrying a spiral thread of nominal pitch from the tip. The thread is interrupted at a plurality of intervals and the shaft is torsionally resilient. When the screw fastener is driven, the shaft twists and contracts so that the thread in the mating material has a pitch which is less than the nominal pitch. The interrupted thread may consist of a plurality of resilient lobes.

REFERENCES:
patent: 1708793 (1929-04-01), Jones

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