Drill rig

Details Drill rig Drill rig

1996-11-06

1998-08-18

Schoeppel, Roger J.

Boring or penetrating the earth

With tool drive prime mover or above-ground mechanical...

175203, 408 16, 408 76, E21B 702

Patent

active

057947244

ABSTRACT:
In a preferred embodiment the core drilling rig of the present invention includes a base, a vertically extending mast, a movable carriage mounted on the mast, an electric powered motor for rotatably driving a core drill bit, and a control system for controlling the supply of electric power to the drive motor. The control system includes a motion sensitive device for detecting the unwanted movement of the base and suspending the supply of electric power to the motor.

REFERENCES:
patent: 3584534 (1971-06-01), Hougen
patent: 3594907 (1971-07-01), Schlegel
patent: 3708020 (1973-01-01), Adamson
patent: 3862418 (1975-01-01), Preiss
patent: 3899033 (1975-08-01), Van Huisen
patent: 4260305 (1981-04-01), Clopton
patent: 4622751 (1986-11-01), Berg
patent: 4723868 (1988-02-01), Ferguson
patent: 5038084 (1991-08-01), Wing
patent: 5058688 (1991-10-01), Scott et al.
patent: 5076392 (1991-12-01), Koenig
Diamond Products, Inc. promotional brochure entitled "Core Bore Drilling Machines," 1990 (4 pages).

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