Undercutter with rotary trencher

Details Undercutter with rotary trencher Undercutter with rotary trencher

1974-09-23

1976-07-06

Burr, Edgar S.

Excavating

Railway graders

37 80A, 37 94, 37 97, 37190, 104 2, 171 16, E01B 2704, E02F 508, E02F 518

Patent

active

039673960

ABSTRACT:
An undercutting apparatus and a method for removing material from beneath railroad track. The apparatus comprises a rotary trench digging means and horizontal chain means to transport the material from beneath the railroad track to the trench digging means at an underground location. In operation the trench digging means digs a trench alongside of the track while at the same time transporting the material delivered by the horizontal chain means to a suitable location above the ground. Preferably the rotary trench digging means comprises a large hollow wheel and one end of the chain means is disposed inside of and near the bottom of the wheel during normal operation of the chain means. Means are provided to pivot the chain means about a vertical axis whereby the chain means can be pivoted from a first position wherein the chain means extends parallel to the track to a second position wherein the chain means extends perpendicular to the track. The chain means is disposed outside of the wheel in the first position and one end of the chain means is disposed inside of the wheel in the second position.

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patent: 3356157 (1967-12-01), Plasser et al.
patent: 3436848 (1969-04-01), Peppin et al.

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