Boring or penetrating the earth – Boring without earth removal
Patent
1986-04-29
1987-07-28
Leppink, James A.
Boring or penetrating the earth
Boring without earth removal
173 27, 173 38, E21B 726
Patent
active
046826599
ABSTRACT:
Ground piercing attachment for a tractor comprising a bracket which is adapted to be mounted to the lower end of the bucket of a tractor, an elongated bar and connector means for mounting the bar on the bracket so that the longitudinal axis of the bar assumes a vertical position irrespective of the orientation of the tractor so that raising of the bucket enables the bottom end of the bar to be positioned above the ground and subsequent lowering of the bucket causes the bar to be driven into the ground.
REFERENCES:
patent: 2426532 (1947-08-01), Tierney
patent: 2969966 (1961-01-01), Matheis
patent: 3327789 (1967-06-01), Furuseth
patent: 3864793 (1975-02-01), Guest
patent: 4066134 (1978-01-01), Karns, III
patent: 4087010 (1978-05-01), Stormon
Leppink James A.
Smith Matthew
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