Screw with two cut removing curved grooves

Details Screw with two cut removing curved grooves Screw with two cut removing curved grooves

1998-09-23

2000-08-22

Wilson, Neill

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

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

Thread or shank structure

4113872, 411386, F16B 2500, F16B 3504

Patent

active

061062081

ABSTRACT:
A screw with two cut removing curved grooves has a head and a shank with a helical threads. The shank has two lengthwise grooves partially overlapping with each other, when viewed projectively from the horizontal surface or from the vertical surface of the center line or axis of the screw.

REFERENCES:
patent: 453563 (1891-06-01), Nicholson
patent: 2428783 (1947-10-01), Cole
patent: 3125923 (1964-03-01), Hanneman
patent: 3451080 (1969-06-01), McIntyre et al.
patent: 3789725 (1974-02-01), Lindstrom
patent: 4673323 (1987-06-01), Russo

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