Interchangeable conveying spiral for rock drills

Details Interchangeable conveying spiral for rock drills Interchangeable conveying spiral for rock drills

1986-05-12

1987-10-13

Novosad, Stephen J.

Boring or penetrating the earth

With tool shaft detail

Helix or helically arranged structure

175394, 198676, E21B 1044

Patent

active

046992260

ABSTRACT:
An interchangeable conveying spiral which can be removably, slidably mounted on a drill shaft for conveying drillings away from a drill head mounted on the end of the spiral. The spiral includes an elongated strip having at least first and second substantially orthogonal webs. The first web has a free, squared-off end. The strip is wound in a spiral with the free, squared-off end of one turn abuting the free, squared-off end of an adjoining turn of the spiral so that the first web forms a closed jacket tube which can be removably, slidably mounted on a drill shaft, and the second web serves exclusively as a transporting shoulder for conveying drillings.

REFERENCES:
patent: 662646 (1900-11-01), Hardsocg
patent: 901819 (1908-10-01), Neitzel
patent: 1684254 (1928-09-01), Bailey
patent: 3372763 (1968-03-01), Fischer
Warmgewalzter Rundkantiger, T-Stahl, (German), DIN 1024, 10/1963.
Warmgewalzter Rundkantiger, S-Stahl, (German), DIN 1023, 10/1963.
Warmgevalzter Gleichshenkliger Rundkantiger Winkelstahl, DIN 1028, 10/1976.
Warmgewalzter Scharfkantiger, T-Stahl, DIN 59051, 10/1963.

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