Hydraulic and earth engineering – Drainage or irrigation – Having regulation of flow through channel
Patent
1980-06-19
1982-08-17
Callaghan, Thomas F.
Hydraulic and earth engineering
Drainage or irrigation
Having regulation of flow through channel
285419, 285425, 285DIG14, E02B 1100
Patent
active
043447201
ABSTRACT:
The decant 2 of a tailings dam comprises a pipe which is formed as a coil with turns 4 which are axially spaced apart one above the other. The end of the bottom turn is connected to a laterally extending water outlet pipe 6 which leads out of the tailings dam and the end of the top turn 7 is open and forms an inlet for the flow of water through the decant out of the dam. The coil is preferably in the form of a conical spiral and the turns are of such a size in relation to the cross-sectional area and wall thickness of the pipe from which they are formed that the coil is compressed axially without overstressing the pipe as, in continued use of the dam, tailings are consolidated around the decant and the decant is gradually extended upwards turn after turn.
REFERENCES:
patent: 1087163 (1914-02-01), Giesenhaus
patent: 1854855 (1932-04-01), Nakashima
patent: 2068876 (1937-01-01), Snyder, Jr.
patent: 2195492 (1940-04-01), McDonald
patent: 3021871 (1962-02-01), Rodgers
patent: 3037356 (1962-06-01), Alcoriza
patent: 3288169 (1966-11-01), Moss
patent: 3402743 (1968-09-01), Brueder
patent: 3623753 (1971-11-01), Henry
patent: 3632140 (1972-01-01), Paine
patent: 3765707 (1973-10-01), Wesberg
patent: 3822075 (1974-07-01), Duncan
patent: 4009734 (1977-03-01), Sullivan
patent: 4218812 (1980-08-01), Jonsson
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