Drilling tool

Details Drilling tool Drilling tool

1989-09-25

1990-11-06

Kisliuk, Bruce M.

Boring or penetrating the earth

Bit or bit element

With helical-conveying portion

175323, 144221, 408230, E21B 1044, B27G 1500

Patent

active

049678558

ABSTRACT:
A drilling tool, in particular for use in axially striking drive machines for drilling in rock, concrete or the like, which drilling tool is designed from both a vibration point of view by varying the abrupt changes in cross-section and from a drilling point of view by optimising the transport of the drilling dust. In order to arrange, from a vibration point of view, the abrupt changes in cross section, caused by the flute webs, in asymmetrically arranged axial positions, the inclination of the conveying flute constantly changes its size within a lead. Furthermore, the radial, tangential and axial force vector which acts on the drilling dust constantly changes its size, the radial force vector also changing its direction. In this way, the drilling dust is subjected to a constantly changing acceleration.

REFERENCES:
patent: 455824 (1891-07-01), Wyman
patent: 2084737 (1937-06-01), Magnus
patent: 2876995 (1959-03-01), Neighly
patent: 2981403 (1961-04-01), Goodrich
patent: 3749189 (1973-07-01), Boehm
patent: 3773122 (1973-11-01), Chromy
patent: 4210215 (1980-07-01), Peetz et al.
patent: 4579180 (1986-04-01), Peetz et al.
patent: 4712948 (1987-12-01), Kidani

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