Method and apparatus for controlling a ramming device

Details Method and apparatus for controlling a ramming device Method and apparatus for controlling a ramming device

1992-11-09

1994-05-03

Britts, Ramon S.

Boring or penetrating the earth

Boring without earth removal

175 71, 175 92, 173 91, E21B 1102

Patent

active

053078837

ABSTRACT:
A method is specified for reversing a compressed air-driven ramming device for its control positions of forward running and rearward running in the earth, wherein, for reversal, a turning is performed against a relatively small detaining force and the force of the operational compressed air is used for locking the control device in the individual control positions and for damping the vibration propagation from a ram housing to the control device. As a result, a reversing of the ramming device during the admission of operational compressed air is reliably prevented.

REFERENCES:
patent: 3727701 (1973-04-01), Sudnishnikov et al.
patent: 3891036 (1975-06-01), Schmidt
patent: 4221157 (1980-09-01), Schmidt
patent: 4537265 (1985-08-01), Cox et al.
patent: 4618007 (1986-10-01), Kayes
patent: 4953626 (1990-09-01), Puttmann et al.
patent: 5050686 (1991-09-01), Jenne
patent: 5086848 (1992-02-01), Hudak

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