B - Operations – Transporting – 01 – D
Patent
B - Operations, Transporting
01
D
182/139
B01D 21/18 (2006.01) B01D 21/22 (2006.01)
Patent
CA 1230562
CABLE,LIFTING MECHANISM FOR SEDIMENTATION DEVICE Ralph B. Haymore Heinz W. Winter ABSTRACT A lifting mechanism for a rake arm and rake structure employed to move sediments settling out from a solids-liquid slurry in a sedimentation tank, includes a fixed center column (27) in the tank and a concentric movable column (28) in telescoping relation to the fixed column. A first series of sheave assemblies (40) are attached to or fixed with respect to the fixed column and a second series of sheave assemblies (51-55) attached to the movable column at a vertically displaced distance from the first series. The respective sheave assemblies may extend in part in an annulus (34) between the fixed and movable columns and are positioned around the peripheries of the respective columns. A continuous cable (45) extends alternately between indivi- dual sheaves in each series and the ends of the cable are attached to a. vertical take-up drum (38). Rotation of the drum winds up both ends of the cable, shortening the cable spans between the respective series of sheave assemblies thus raising the movable column with respect to the fixed column. The rakes, rake arms (17) and various torque members (14) and drive members (16) are attached to the movable column and are raised in unison by the take-up action of the cable ends by the drum . Spaced vertically extending multiple keys (60) and keyways (51) are affixed to facing surfaces of the fixed and movable column and the multiple sheave assemblies are positioned between the spaced keys and keyways.
453327
Haymore Ralph B.
Winter Heinz W.
Envirotech Corporation
Groupe Laperriere & Verreault Inc.
Macrae & Co.
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