Lubricated pilot tubes for use with auger boring machine...

Details Lubricated pilot tubes for use with auger boring machine... Lubricated pilot tubes for use with auger boring machine...

2007-03-07

2009-11-10

Bagnell, David J (Department: 3672)

Boring or penetrating the earth

Processes

Boring horizontal bores

C175S320000, C299S001300

Reexamination Certificate

active

07614461

ABSTRACT:
A pilot tube for an auger boring machine has a lubrication through passage formed therein through which water or another lubricant may be pumped during the driving of the pilot tube to facilitate formation of a pilot hole in the earth which is subsequently followed by an auger in forming a trenchless hole for laying underground pipe. Preferably, the lubrication passage extends to exit openings adjacent or on a steering head. A lubrication feed swivel is connected the trailing end of the pilot tube for feeding the water into the pilot tube while allowing rotation of the pilot tube for the steering thereof during the process of driving the pilot tube.

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