Boring or penetrating the earth – With means to feed drive
Patent
1983-11-09
1985-11-19
Leppink, James A.
Boring or penetrating the earth
With means to feed drive
175171, 175202, 175203, 175220, 173152, E21B 720
Patent
active
045536120
ABSTRACT:
An earth boring machine for boring straight and level elongated holes through rock-laden earth. The machine includes a stationary elongated frame upon which a first slide is carried. A second slide is carried on the first slide. An elongated auger guiding sleeve is carried adjacent one end of the first slide and has a cutting edge on a remote end thereof. A power-driven auger assembly is carried on the second slide and includes an auger which extends within the guiding sleeve. A cutting tool is carried on the end of the auger adjacent a remote end of the guiding sleeve. An hydraulic cylinder is provided for advancing the first sleeve for driving the cutting edge of the guiding sleeve into the earth while the power driven auger removes the earth as the guiding sleeve is advanced. Another set of hydraulic cylinders are provided for advancing the second slide on the first slide causing the cutting tool to extend out beyond the remote end of the guiding sleeve for cutting through obstructions in the earth when the cutting edge of the guiding sleeve is prevented from moving forward.
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patent: 3174562 (1965-03-01), Stow
patent: 3390730 (1968-07-01), Techy et al.
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patent: 3730285 (1973-05-01), Anderson et al.
patent: 4105081 (1978-08-01), Perrand
patent: 4158520 (1979-06-01), Prebensen
patent: 4251046 (1981-02-01), Walmsley et al.
Dang Hoang C.
Dority Julian W.
Leppink James A.
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