Excavating – Peat excavators
Patent
1976-11-08
1979-10-09
Crowder, Clifford D.
Excavating
Peat excavators
37 57, 37 72, 9 8R, E02F 388
Patent
active
041700791
ABSTRACT:
In a vessel-mounted dredging device in which material freed by revolving cutters is pumped through a suction mouth and discharge pipe to a place remote from the cutters, a submersible dredge pump is mounted on a platform which supports cutter discs spaced from one another and positioned to deliver material to the suction side of the pump. Trapezoidal teeth are pivotally mounted to swing to either side of a radius of each cutter disc, making the teeth effective for either direction of rotation of the cutter disc. The cutter discs are selectively rotatable in either direction, preferably counter-rotating with respect to one another. The platform is mounted on a mast which is so constructed and arranged as to be movable vertically. The vessel itself is so constructed as to permit a discharge pipe to extend fore and aft along the center line of the vessel. The discharge pipe is connected at one end to the discharge side of the pump, and supported at its other end on rollers at the after section of the vessel, permitting translation of the pipe in response to upward and downward movement of the platform. The platform is preferably hinged to the end of the mast, to permit the platform to swing to an angle to the horizontal, selectively.
The cutter discs are driven by hydraulic motors, acting through speed reducers which are supplied with lubricant under constant, superatmospheric pressure.
The vessel is preferably provided with outboard pontoons, hinged in such a way as to permit their being swung to a position above the main deck.
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