Drilling device with an impact-rotation tool

Details Drilling device with an impact-rotation tool Drilling device with an impact-rotation tool

1990-10-26

1991-12-31

Neuder, William P.

Boring or penetrating the earth

With above-ground means to impact an earth-penetrating means

299 23, E21C 3704

Patent

active

050763741

ABSTRACT:
The drilling device for memory, particularly aerated concrete, includes an impact drilling machine and an impact rotation tool to be clamped in the drilling machine. To prevent the impact-drilling shank jamming in the drill hole as it is withdrawn, and nevertheless to achieve maximum holding power in the masonry, the impact-rotation tool consists of an impact-drilling shank tapered conically toward a tip from a cylindrical middle portion of increased diameter, a carrier bush connected with a circumferential shoulder of the impact-drilling shank and a ram engaging with some play in an internal bore of the carrier bush. A drill bit-like locating means is provided on the ram for engagement in the drilling machine.

REFERENCES:
patent: 2534809 (1950-12-01), Brown
patent: 2691512 (1954-10-01), Arizio
patent: 4474410 (1984-10-01), Ogaki et al.

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