Mole with rotary vibrator

Details Mole with rotary vibrator Mole with rotary vibrator

1985-11-12

1987-11-10

Novosad, Stephen J.

Boring or penetrating the earth

Boring without earth removal

175 56, 405146, 37DIG18, E21B 726

Patent

active

047051167

ABSTRACT:
A ground boring tool known as a mole is fitted within its conical head (1) with a pneumatic-powered rotatory vibrator (8) which generates severe radial vibrations. As a result the progress of the mole through resistant ground is speeded or made possible. The mole also may be used for upgrading existing ducts with or without the destruction of an existing lining to such ducts. For destruction of existing linings elongate ridges (16) may be positioned on the surface of the cone.

REFERENCES:
patent: 2229912 (1941-01-01), Baily
patent: 2951681 (1960-09-01), Degen
patent: 3309877 (1967-03-01), Degen
patent: 3550698 (1970-12-01), Pauley
patent: 3800889 (1974-04-01), Bauer
patent: 4507019 (1985-03-01), Thompson

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