Self-propelled ram boring machine

Details Self-propelled ram boring machine Self-propelled ram boring machine

1990-04-04

1991-04-30

Novosad, Stephen J.

Boring or penetrating the earth

Boring without earth removal

175 45, 175 61, 175306, 175 62, E21B 406, E21B 708, E21B 47024

Patent

active

050109650

ABSTRACT:
In a self-propelled ram boring machine, in particular for making earth bores, having a striking tool at the leading end of a cylindrical housing, a striking piston movable to subject said striking tool to ramming blows, said striking piston being driven with pulsating, translatory working strokes, the striking tool is mounted in the housing to rotate about the axis of rotation and comprises kinematic means cooperating with the housing to change a translatory movement following each blow of said striking piston into a gradual rotary movement, and pneumatically operable means for initiating or interrupting the rotary movement.

REFERENCES:
patent: 3525405 (1970-08-01), Coyne et al.
patent: 3712387 (1973-01-01), Vincent et al.
patent: 4621698 (1986-11-01), Pittard et al.
patent: 4694913 (1987-09-01), McDonald et al.
patent: 4867255 (1989-09-01), Baker et al.
patent: 4907658 (1990-03-01), Stangl et al.

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