Liquid purification or separation – Structural installation – Flume stream type
Patent
1980-08-11
1981-09-15
Granger, Theodore A.
Liquid purification or separation
Structural installation
Flume stream type
B01D 3516
Patent
active
042896193
ABSTRACT:
With a screen disposed in a flowing waterstream of sewage and other waste materials to intercept objects such as rags, plastic, wood, metal, fragments of masonry and the like, such objects are removed from the screen by a reciprocating mechanical rake to a point of disposal or further treatment. Elongated rods secured at one end to the rake are pivotally connected at the other end to a power driven endless chain for travel therewith towards and away from the screen with such chain and power supply being remotely located at a point free of contact with the waterstream. The screen shown with this invention is one formed of parallel spaced longitudinal bar grates and teeth on the rake extend between the grates as the rake travels on a lower track during its debris removal stroke effected by the rod connection to the chain and the moving chain draws the rods into engagement with a fulcrum at the end of the cleaning stroke for tilting the rod and rake upwardly for registration of the rake with an upper track so that the continuing travel of the chain in reversing its direction moves the rake through the rod connection on the upper track in a return stroke out of engagement with the screen to a point where the rake drops by gravity onto the lower track in engagement with the screen for another debris removal stroke. Debris adhering to the rake at the end of the cleaning stroke will fall therefrom by gravity as the rake is tilted in transfer from the lower track to the upper track.
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Adler Morton S.
Granger Theodore A.
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