Board anchor

Details Board anchor Board anchor

1999-07-29

2000-10-31

Saether, Flemming

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

Having separate expander means

With hole forming means

411 801, 4113871, 411419, 408223, F16B 1304

Patent

active

061392367

ABSTRACT:
An anchor that screws directly into a board without requiring a tap drill hole. A male screw is provided around the shaft part of the anchor with a drill part at one end and a flange part at the other end; at the end where the flange part is provided, a turning tool engagement hole and a female screw formed hole part continuous therewith are provided. The drill part is formed into a tapered-pyramid shape, multiple split shaft parts being formed by providing a slit that extends from the end surface of the pyramid-shaped drill part to midway up the shaft part. The tip of the split shaft part incorporate connected multiple drill bits that are formed by splitting the pyramid-shaped drill part.

REFERENCES:
patent: 1138219 (1915-05-01), Hottenroth
patent: 3482482 (1969-12-01), Sage
patent: 5160225 (1992-11-01), Chern
patent: 5692864 (1997-12-01), Powell

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