Drilling tool

Details Drilling tool Drilling tool

1994-03-30

1995-10-31

Dang, Hoang C.

Boring or penetrating the earth

With tool shaft detail

Helix or helically arranged structure

175394, E21B 17042, E21B 1722

Patent

active

054621305

ABSTRACT:
A drilling tool and, in particular, a rock drill, which is of multi-part design, is proposed. In this, the drill head and/or the clamping shank is connected via a helical shank designed as a threaded rod.

REFERENCES:
patent: 436558 (1890-09-01), Buckingham
patent: 1156336 (1915-10-01), Wegland
patent: 1964030 (1934-06-01), Brush
patent: 2733943 (1956-02-01), Nater
patent: 3424479 (1969-01-01), Ditson et al.
patent: 3554308 (1971-01-01), Ditson
patent: 4202420 (1980-05-01), Peetz et al.
patent: 4262762 (1981-04-01), Potratz
patent: 4363366 (1982-12-01), Hilty
"Heller Ratio-Werkzeugsystem" (Heller ratio tool system), 1 page.

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