Agitating element for discharging poorly pourable bulk...

Conveyors: power-driven – Conveyor system having a gravity conveyor section – Bin having a power-driven conveyor section for discharging...

Reexamination Certificate

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Details

C198S548000, C198S550100, C198S671000

Reexamination Certificate

active

07392895

ABSTRACT:
In a method and a device for discharging poorly pourable bulk materials from a receptacle, the material is first rendered free-flowing via a helically shaped agitating element (worm conveyer) and secondly discharged from the receptacle via a spiral shaped agitation element (spiral conveyer). Both elements are mechanically coupled at their respective lose ends. The respective other ends of the agitating elements are attached to a common shaft. The shaft connects to a gear drive at its upper end which provides for the rotational movement of the two agitating agents. The rotation of the worm conveyor transports the material situated between the turns of the worm conveyer upward to the bulk material surface. This breaks up the bulk material. Material that has been brought up by the worm conveyer flows downward again due to the gravitational force. Some of the material flows back along the outer space around the worm conveyer while the other portion moves down through the center of the worm conveyer. Thus two circulating flows of bulk material are generated. The spiral conveyor rotating at the bottom of the receptacle sweeps the free flowing bulk material to the outlet opening for discharge from the receptacle.

REFERENCES:
patent: 2751203 (1956-06-01), Compton
patent: 3685638 (1972-08-01), Siwersson et al.
patent: 3949863 (1976-04-01), Lippi
patent: 4275808 (1981-06-01), Bullivant et al.
patent: 4324495 (1982-04-01), Martinez
patent: 4351627 (1982-09-01), Forsberg
patent: 4441603 (1984-04-01), Baumard
patent: 5685382 (1997-11-01), Deeter
patent: 6679559 (2004-01-01), Kelm
patent: 7192094 (2007-03-01), Kelm
patent: 43 39 974 (1995-06-01), None
patent: 197 06 407 (1998-06-01), None

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