Ram boring machine with impact blade piston

Details Ram boring machine with impact blade piston Ram boring machine with impact blade piston

1986-09-23

1988-03-22

Novosad, Stephen J.

Boring or penetrating the earth

Boring without earth removal

Drive point detached from shaft to form cased bore or with...

175295, 405156, 405184, 30 925, E21B 1102, F16L 5518

Patent

active

047322225

ABSTRACT:
In a ram boring machine for laying pipelines without trenching, a double blade that is axially moveable against a compression spring is housed in an impact tip and projects through slots in the impact tip. The double blade is struck by a striker piston and moves, during the breaking-up of an old pipe laid in the ground, substantially independently of the ram boring machine or of its housing. In this way substantially all the impact energy of the piston is used for the benefit of the breaking-up operation.

REFERENCES:
patent: 4505302 (1985-03-01), Streatfield et al.
patent: 4507019 (1985-03-01), Thompson

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