B - Operations – Transporting – 01 – D
Patent
B - Operations, Transporting
01
D
182/138
B01D 21/20 (2006.01) B01D 21/06 (2006.01)
Patent
CA 1036507
Abstract of the Disclosure A large sedimentation tank having a traction-driven composite sludge raking mechanism provided with lift capability, and comprising a rotary traction-driven drive arm of girder-like construction exposed above the liquid level, and draft-connected to an inner load yielding self-liftable rake arm operating in the central sludge accumulation zone in the tank, and also connected to an outer complementary rake structure operating in an outer annular zone to move sludge therefrom into the central accumulation zone.
214182
Hill Donald R.
Seifert Jay A.
Smith Michael J.
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