Excavating – Peat excavators
Patent
1987-05-08
1989-02-28
Crowder, Clifford D.
Excavating
Peat excavators
37 58, 210170, 210237, 210241, 2104161, E02F 388
Patent
active
048073733
ABSTRACT:
A loop circuit method and apparatus for dredging a first area water and in which the water being used to transport the solid material (the dredging water) is continuously routed around in a loop and used repeatedly to convey the solid material from the first area to a second, solids collecting area. The loop circuit may be either quasi-closed or completely closed depending on where the returning dredge water is discharged at the first area. An improved dredge head which may be operated by a diver and in which the returning dredge water is discharged adjacent the nozzle and acts to stir up the material in that location. Alternatively, the returning dredge water can be discharged directly in the nozzle of the dredge head and acts to help convey the material picked up by the nozzle, and this constitutes a completely closed circuit. The second area of solid collecting area may include a dump body into which the mixture is dumped and from which the returning dredge water is extracted via a filter, and then returned to the first area.
REFERENCES:
patent: 1611478 (1926-12-01), Massey
patent: 3631997 (1972-01-01), De Koning
patent: 3975842 (1976-08-01), Andreae
patent: 3999566 (1976-12-01), Iwata et al.
patent: 4053181 (1977-10-01), Saito
patent: 4352251 (1982-10-01), Sloan
patent: 4479741 (1984-10-01), Berti et al.
Sloan Albert H.
Sloan Owen K.
Crowder Clifford D.
Nilles James E.
Sloan Pump Company, Inc.
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