Pilot head for laying pipes in the ground

Details Pilot head for laying pipes in the ground Pilot head for laying pipes in the ground

1975-12-22

1977-05-31

Purser, Ernest R.

Boring or penetrating the earth

With signaling, indicating, testing or measuring

Tool position direction or inclination measuring or...

175 19, 175 62, 175 61, 175 73, E21B 4702

Patent

active

040263711

ABSTRACT:
There is disclosed a pilot head used for laying small-diameter pipes such as gas, water conduits or the like precisely in position in the ground. The pilot head comprises an expandable and contractable pilot jack disposed within a pilot casing, a pivoting cylinder adapted for pivoting said pilot jack in any selected direction in a plane normal to the central axis of the pilot head, and an electromagnetic valve for operating said cylinder. The pilot head further includes a target and a clinometer both for detecting the position and posture thereof.

REFERENCES:
patent: 2874936 (1959-02-01), Gonzales
patent: 3326008 (1967-06-01), Baran et al.
patent: 3465834 (1969-09-01), Southworth, Jr.
patent: 3468133 (1969-09-01), Matsushita
patent: 3506310 (1970-04-01), Gruere
patent: 3526285 (1970-09-01), Adkins et al.
patent: 3767836 (1973-10-01), Geis et al.
patent: 3857449 (1974-12-01), Kimura

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