Device for removing material screened or filtered out of a liqui

Details Device for removing material screened or filtered out of a liqui Device for removing material screened or filtered out of a liqui

1987-12-22

1989-08-22

Fisher, Richard V.

Liquid purification or separation

Structural installation

Flume stream type

210415, B01D 3502, E02B 508, E02B 802, E03F 514

Patent

active

048593222

ABSTRACT:
A device for removing material screened or filtered out of a liquid flowing in a channel. It consists of an unpowered cylindrical grating that merges into a screw-type conveyor. The grating slants down, partly immersed in the liquid, to the bottom of the channel. The bars of the grating extend over its total length leaving longitudinal interstices between them. The upward-sloping conveyor comprises a housing, a shaft, and a worm and conveys the screened-out material to a depositing point. The worm picks up the screened-out material as it scrapes the bars of the grating and conveys the material upward, constantly keeping the grating clean. The grating bars (8) are more or less triangular or trapezoidal in cross-section, with rounded-off edges, and positioned in such a way that one side (25) of the triangular or trapezoidal cross-section is oriented tangential to the circumference of the conveyor worm (16). The longitudinal interstice (10) is narrowest at the least possible radius at that point, adjacent to which its open cross-section (28) expands over-proportionally in the direction (32) traveled by the liquid. The grating bars that demarcate the longitudinal interstices are connected by outside bracing bars (9).

REFERENCES:
patent: 689440 (1901-12-01), Tuska
patent: 1096199 (1914-05-01), Schuyler
patent: 2491912 (1949-12-01), Walker
patent: 2929504 (1960-03-01), Lind et al.
patent: 3688687 (1972-09-01), Craig et al.
patent: 3695173 (1972-10-01), Cox
patent: 4424129 (1984-01-01), Bunger

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