Sludge removal

Details Sludge removal Sludge removal

2008-05-13

2008-05-13

Hartmann, Gary S (Department: 3671)

Excavating

Beneath a body of water

Suction

C037S317000, C210S107000, C210S108000, C210S357000, C210S360200, C405S128250

Reexamination Certificate

active

07370445

ABSTRACT:
A sludge removal apparatus includes a sludge removal head (10) with a sludge suction duct and an water supply duct with open end portions alongside each other, and a filter (32) adjacent to the open ends of the suction duct (36) and the water supply duct (38) so that the sludge is extracted through the filter (32). A drive mechanism moves the filter so that regions of the filter pass successively over the open ends of the suction duct, where it may become partially blinded with sludge, and then over the water supply duct where it is backwashed.

REFERENCES:
patent: 2954873 (1960-10-01), Davis
patent: 3356215 (1967-12-01), Miles, Jr.
patent: 3425557 (1969-02-01), Rosaen
patent: 4377485 (1983-03-01), Krofta
patent: 4639315 (1987-01-01), Fuchs
patent: 4781825 (1988-11-01), Grimes et al.
patent: 5128029 (1992-07-01), Herrmann
patent: 5855799 (1999-01-01), Herrmann

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