Portable earth boring machine

Details Portable earth boring machine Portable earth boring machine

1975-07-02

1977-08-16

Purser, Ernest R.

Tool driving or impacting

Advance causing or controlling means

Motor causes or controls advance

60489, 175122, 175171, E21D 902, E02D 728

Patent

active

040420434

ABSTRACT:
A portable earth boring machine for the horizontal boring of shafts and the insertion of pipeline casing sections in installations where excavation from the surface is undesirable. The machine is characterized by frame means adapted for movement along a track means, which frame means supports an engine which drives an earth boring auger as well as casing pusher apparatus for pushing casing sections into the earth fill as the boring operation progresses. The machine is further characterized by a fluid actuated pusher cylinder means for advancing the auger into the earth fill and associated automatic auger feed control means for automatically maintaining a constant fluid flow rate to said pushing cylinder means under variations in resistance to auger penetration of said earth fill during a boring operation.

REFERENCES:
patent: 3220494 (1965-11-01), Cannon
patent: 3464502 (1969-09-01), Ageton
patent: 3587755 (1971-06-01), Slusher
patent: 3869003 (1975-03-01), Yamada et al.
patent: 3910358 (1975-10-01), Martinek

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