Drill rig having alternate spindle drive

Details Drill rig having alternate spindle drive Drill rig having alternate spindle drive

1994-08-01

1996-06-11

Smith, Scott A.

Tool driving or impacting

Automatic control of power operated means

173213, 173216, 173222, F21B 302

Patent

active

055247130

ABSTRACT:
A drill rig includes a main engine which drives a drilling spindle through a clutched transmission. A protective cage surrounds the spindle when the transmission is in gear to prevent workmen from being injured by drilling tools. An auxiliary drive motor operates the spindle for a limited number of revolutions when the transmission is in neutral and the protective cage is open to permit workmen to rotate the spindle to add and remove augers, couple and uncouple drilling rods, and perform other necessary tasks.

REFERENCES:
patent: 2612347 (1952-09-01), Siracusa
patent: 3390728 (1968-07-01), Bartos
patent: 3437158 (1969-04-01), Proffer
patent: 3472557 (1969-10-01), Hlinsky
patent: 3766995 (1973-10-01), Young et al.
patent: 5029655 (1991-07-01), Ebeling
patent: 5437338 (1995-08-01), Martin et al.

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