Depth-indicating planting machine

Details Depth-indicating planting machine Depth-indicating planting machine

1974-11-22

1976-12-21

Pellegrino, Stephen C.

Planting

Drilling and broadcasting

Main and auxiliary frame machines

111 89, A01C 1100

Patent

active

039981711

ABSTRACT:
A planting machine is provided having a pneumatic depth indicator on the digging tool and comprising at least one gas conduit for conveying a gas under superatmospheric pressure from one end to the other end thereof, the one end being connected to a gas supply source, and the other end being open to atmosphere and spaced a distance from the digging tool end equal to the depth of the hole dug by the tool for a plant, the other end being so arranged that the opening to atmosphere is plunged into blocking contact to the earth when the predetermined hole depth is reached, thereby halting flow of gas from the conduit.

REFERENCES:
patent: 2776633 (1957-01-01), Bible
patent: 3029756 (1962-04-01), Kriuda
patent: 3450073 (1969-01-01), Baker

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