Device for advancing drillings in the ground

Details Device for advancing drillings in the ground Device for advancing drillings in the ground

2003-07-18

2010-02-09

Gay, Jennifer H (Department: 3672)

Boring or penetrating the earth

Bit or bit element

Rolling cutter bit or rolling cutter bit element

C175S371000, C175S092000, C175S102000

Reexamination Certificate

active

07658244

ABSTRACT:
A device for driving boreholes in the ground, having a rotationally driven main shaft with a shaft journal whose axis (B) forms an acute angle with respect to the axis (A) of the main shaft. A drill head is mounted such that it can rotate about the axis (B) of the shaft journal and has a circumferential region which runs on a complementary circumferential region, wherein the complementary circumferential region can be set rotating.

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English Translation of DE4332113.
Patent Abstracts of Japan,Bd. 1996, No. 04, April 30, 1996 & JP 07 324591 A (Fujita Corp), Dec. 12, 1995.

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