Locating devices for soil displacement hammers

Details Locating devices for soil displacement hammers Locating devices for soil displacement hammers

1988-04-04

1989-08-08

Novosad, Stephen J.

Boring or penetrating the earth

With signaling, indicating, testing or measuring

Tool position direction or inclination measuring or...

175 19, 340855, E21B 47024

Patent

active

048543985

ABSTRACT:
A locating device for a soil displacement hammer is disclosed and comprises a cylindrical, radio wave-transparent housing which is releasably connected between an air line for the soil displacement hammer (mole) and the hammer itself so as to permit air communication through the housing. Mounted along the axis of the housing is a cylindrical radio wave transmitter, such that, when the hammer is driven through the ground by repeated pneumatic impact, its location under the ground can be detected at the surface.

REFERENCES:
patent: 3746106 (1973-07-01), McCullogh et al.
patent: 4674579 (1987-06-01), Geller et al.
patent: 4684946 (1987-08-01), Issenmann
patent: 4694913 (1987-09-01), McDonald et al.

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