Air operated dredging apparatus

Details Air operated dredging apparatus Air operated dredging apparatus

1974-12-05

1976-11-30

Crowder, Clifford D.

Excavating

Peat excavators

417122, 417137, E02F 388

Patent

active

039940829

ABSTRACT:
Air operated dredging apparatus comprising a submerged pumping unit adapted to be dragged along an underwater bed which unit includes at least two pumping chambers periodically filled with loose material in admixture with water entering the chamber through a duct connecting a dredging shovel to the chamber, and emptied by feeding compressed air into the said chamber. A check valve is provided on the duct upstream of the entrance to the chamber whereby escape of air through the duct and the shovel is avoided.

REFERENCES:
patent: 672247 (1901-04-01), Wheeler et al.
patent: 1600505 (1926-09-01), Hunter
patent: 2003779 (1935-06-01), Yedd
patent: 3540194 (1970-11-01), Chaplin
patent: 3552884 (1971-01-01), Faldi
patent: 3624933 (1971-12-01), Faldi
patent: 3667865 (1972-06-01), Faldi
patent: 3693272 (1972-09-01), Gariel
patent: 3748760 (1973-07-01), Schnell
patent: 3842522 (1974-10-01), Holzenberger et al.

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