Impact tool for tunneling

Details Impact tool for tunneling Impact tool for tunneling

1987-02-13

1988-06-07

Novosad, Stephen J.

Boring or penetrating the earth

Boring without earth removal

175 21, 175390, 173125, E21B 1102

Patent

active

047490500

ABSTRACT:
An impact tool having an air-operated hammer for impacting against an anvil in the body of the tool to cause the tool to tunnel through the ground and having passages and conduits opening to the front tip of the tool to pass water to lubricate the tool to ease the passage of the tool through the soil during the propulsion of the tool, the front tip further having a headpiece through which the passages open to the tool exterior surface.

REFERENCES:
patent: 955729 (1910-04-01), Welsh
patent: 1005770 (1911-10-01), Clark
patent: 3885638 (1975-05-01), Skidmore
patent: 4144941 (1979-03-01), Ritter
patent: 4250972 (1981-02-01), Schmidt
patent: 4280573 (1981-07-01), Sudnishnikod et al.

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