Apparatus for laying a surface

Details Apparatus for laying a surface Apparatus for laying a surface

1996-12-13

2000-07-11

Pezzuto, Robert E.

Earth working

Tool, standard or connection

Frame-supported blade, scraper, or smoother drawn by vehicle

172197, A01B 2700, A01B 3100

Patent

active

060858486

ABSTRACT:
The invention relates to a dresser for dressing particulate material, such as sand, in a slow sand filter of a water treatment works. The dresser includes a frame having transverse mixing members which are adapted to mix the material at or adjacent the surface of the particulate material.

REFERENCES:
patent: 3448814 (1969-06-01), Bentley et al.
patent: 4436040 (1984-03-01), Chumtey
patent: 4836295 (1989-06-01), Estes
patent: 5213164 (1993-05-01), Monk

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