Boring or penetrating the earth – Ice boring
Patent
1997-01-13
1999-06-29
Dang, Hoang C.
Boring or penetrating the earth
Ice boring
175323, 175394, E21B 1044
Patent
active
059154853
ABSTRACT:
An auger bit for boring ski post holes having an elongated shank with a drill head fixed at a first end of the shank. The preferred drill head has diametrically opposed first and second open chip mouths, each defined by an advancing face and a trailing face of the drill head. The advancing face of the drill head may be oriented at a vertical rake angle and at a radial advance angle for propelling debris proximally from the drill head into and through the first and second chip mouths into first and second chip throats. The bit may include first and second excavating helices wound around the shank for a given number of rotations each at a given helix angle whereby first and second chip throats are formed. The second excavating helix may wind around the shank for a lesser number of rotations than does the first whereby a unitary chip throat succeeds the first and second chip throats. Preferably, the bit has an overall length greater than about fifteen inches and a shank which is hollow. The shank and helices may be made from titanium, and a cutting tip of the drill head may be made from tungsten carbide. The bit may be coated with Teflon.
REFERENCES:
patent: 2339104 (1944-01-01), Phipps
patent: 2614814 (1952-10-01), Jones et al.
patent: 3854727 (1974-12-01), Alexander
patent: 4488605 (1984-12-01), Ruppel et al.
patent: 4529341 (1985-07-01), Greene
patent: 4579180 (1986-04-01), Peetz et al.
patent: 4950108 (1990-08-01), Roos
patent: 4967855 (1990-11-01), Moser
patent: 4968193 (1990-11-01), Chaconas et al.
patent: 5038870 (1991-08-01), Kuronen
patent: 5096344 (1992-03-01), Fischer
patent: 5244319 (1993-09-01), Cochran
patent: 5265688 (1993-11-01), Rumpp et al.
patent: 5399051 (1995-03-01), Aken et al.
patent: 5403130 (1995-04-01), Moser et al.
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