Excavating – Peat excavators
Patent
1976-04-28
1977-10-11
Crowder, Clifford D.
Excavating
Peat excavators
37195, 241278R, E02F 392
Patent
active
040528014
ABSTRACT:
A dredging system for excavating difficult-to-dig material wherein a cutterhead is supported on a boom mounted on a floatable vessel and a suction conduit communicating with a suction developing mechanism leads to the cutterhead housing. The cutterhead housing is mounted for pivotal movement about a generally longitudinal axis on the longitudinally extending boom and has a vertically disposed rotary disc supported in the cutterhead housing forwardly of a material collecting compartment for rotation about a transverse axis. At least one opening is provided through the disc and a knife is mounted on the outer face of the disc in a position to cut material and to propel it through the opening to the material receiving compartment from which it is moved into the suction conduit and removed to a remote location. Because the cutterhead housing and its rotary disc are supported for powered pivotal movement on the boom about a generally longitudinal axis, the cutterhead can, at the ends of its sidewise paths of travel in each direction be turned stepwise end-for-end, cutting a path for itself as it moves to a position in which it can take a return cut at a lower level.
REFERENCES:
patent: 222380 (1879-12-01), Chaquette
patent: 341539 (1886-05-01), Angell
patent: 388253 (1888-08-01), Bowers
patent: 709861 (1902-09-01), Bates
patent: 887506 (1908-05-01), Newcomb
patent: 3474549 (1969-10-01), Schnell
patent: 3807066 (1974-04-01), Proehl
patent: 3867772 (1975-02-01), Smith
patent: 3877159 (1975-04-01), Boomstra
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