Tool for introducing self-tapping dowels

Details Tool for introducing self-tapping dowels Tool for introducing self-tapping dowels

1978-01-23

1979-09-25

Purser, Ernest R.

Boring or penetrating the earth

With above-ground means for preparing or separating drilling...

175213, 175218, 173 58, 279 20, 408 58, E21C 702

Patent

active

041687531

ABSTRACT:
A tool for introducing self-tapping dowels in a structure by a drilling process which is accompanied by the generation of large-size drillings, has a shaft connectable with a drive, a dowel holder connectable with the shaft and having a receiving bore which includes a first section adapted to receive a dowel shank and a second section adapted to receive the large-size drillings, and a suction arrangement movable relative to the dowel holder to and from an operative position in which it communicates with the second portion of the dowel holder and draws air therethrough to thereby suck the large-size drillings into the second section of the dowel holder bore wherein they are retained during the drilling process.

REFERENCES:
patent: 1112498 (1914-10-01), Vanes
patent: 2339324 (1944-01-01), Fischer
patent: 2879035 (1959-03-01), Tilden
patent: 2918260 (1959-12-01), Tilden
patent: 3131947 (1964-05-01), McCarty et al.
patent: 3638737 (1972-02-01), Moates
patent: 4097176 (1978-06-01), Wanner et al.

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