Trench excavating and shoring apparatus

Details Trench excavating and shoring apparatus Trench excavating and shoring apparatus

1979-03-09

1981-02-03

Crowder, Clifford D.

Excavating

Peat excavators

405283, E02F 504, E02D 1708

Patent

active

042479975

ABSTRACT:
A ditch-digging or trenching machine has a plurality of wall-engaging spreadable and retractable members which can be received in the trench to be advanced and provided with respective fluid-powered cylinders connectible to a cutting head for advancing the latter and drawing the retracted wall-engaging members thereafter to cut the trench. The cutter head includes a milling-type cutter in the form of a worm conveyor adapted to convey the detritus from the trench.

REFERENCES:
patent: 96824 (1869-11-01), McGehee
patent: 606987 (1898-07-01), Clark
patent: 685667 (1901-10-01), Bradshaw
patent: 799753 (1905-09-01), O'Connor
patent: 2545016 (1951-03-01), Berry
patent: 2994974 (1961-08-01), Domenighetti
patent: 3750409 (1973-08-01), Orfei
patent: 3820345 (1974-06-01), Brecht
patent: 4173836 (1979-11-01), Paurat

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