Orbital trench forming apparatus

Details Orbital trench forming apparatus Orbital trench forming apparatus

1975-10-10

1977-08-02

Burr, Edgar S.

Excavating

Peat excavators

37141R, 37142R, 37DIG18, 83751, 83778, 172 40, 299 38, E02F 502, E02F 928

Patent

active

040387631

ABSTRACT:
A trenching apparatus of a type for use particularly in hard or discontinuous soils. First and second triangular members, having digging teeth connected to the leading edges thereof, are connected to the housing by three crank assemblies. One of the crank assemblies is coupled to the motor for turning the crank and thereby oscillating the first and second members. One of the crank assemblies is a timing crank for establishing the proper relative movement between the first and second members so that the orbital motion of the first and second members are 180.degree. out of phase.

REFERENCES:
patent: 774102 (1904-11-01), Payne
patent: 1726863 (1929-09-01), Singer
patent: 3326010 (1967-06-01), Gagne
patent: 3647003 (1972-03-01), Gagne
patent: 3685591 (1972-08-01), Ulrich et al.
patent: 3914948 (1975-10-01), Kaercher, Jr.

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