Riffle bars

Details Riffle bars Riffle bars

1987-05-26

1989-09-05

Reeves, Robert B.

Classifying, separating, and assorting solids

Plural, diverse separating operations

Sifting and stratifying

209458, 209507, B03B 700

Patent

active

048635880

ABSTRACT:
A hydraulically operated set of riffles includes a network of spaced-apart tubular riffle bars arranged to lie above a collecting surface in a riffle box. A plurality of generally downwardly directed apertures is formed in each riffle bar, and a flange extends generally upwardly along the length of the riffle bar. An inlet of each riffle bar is connected to a source of water or other fluid. In operation, water or other fluid that is supplied to the riffle bars passes forcibly outwardly through the apertures and is subsequently constrained to flow outwardly through the spaces between adjacent riffle bars to prevent undesired accumulation of particles between adjacent riffle bars.

REFERENCES:
patent: 225237 (1880-03-01), Reber
patent: 252793 (1882-01-01), Oliver
patent: 433882 (1890-08-01), Belding
patent: 847519 (1907-03-01), Sloane
patent: 1030499 (1912-06-01), Wishart
patent: 1108499 (1914-08-01), Hiltscher
patent: 1364991 (1921-01-01), Hayes, Jr.
patent: 1620142 (1927-03-01), Thompson
patent: 2192115 (1940-02-01), Ware
patent: 4294693 (1981-10-01), Brennan
patent: 4592833 (1986-06-01), Perdue

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