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US 6,786,366 B2Granted
Metering device for dry bulk material
AssigneeMotan Holding GmbH
InventorsWalter Kramer, Holger Kühnau, Manfred Nowak, Paul Hodruss
Life of this patent
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AssigneeMotan Holding GmbH
InventorsWalter Kramer, Holger Kühnau, Manfred Nowak, Paul Hodruss
Estimating the term…
A metering device for metering dry bulk material contained in a storage container has at least one metering element and a rotary drive connected to the at least one metering element. At least one outlet is provided, and the metering element feeds the dry bulk material to the outlet. The metering element transports the dry bulk material in a direction different from a horizontal direction and comprises at least one helical stay. The outlet has an outlet pipe that extends into the lower area of the storage container. The helical stay interacts with the outlet pipe for effecting transport of the dry bulk material.
A metering device for metering dry bulk material contained in a storage container, the metering device comprising:
Dependencies are inferred from the claim text.
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From the US filing history. Foreign family members aren’t listed.
Using screw conveyors: arranged vertically or substantially vertically within the container
For fluent solid material: comprising a screw conveyor
Transport or storage devices
Measuring volume, volume flow, mass flow or liquid level
Term ended 3 Apr 2023 (estimated)
1. Field of the Invention
The invention relates to a metering device for dry bulk material comprising at least one metering element driven by a rotary drive for feeding the bulk material from a storage container to at least one outlet.
2. Description of the Related Art
FIG. 1 is an axial section of a first embodiment of the metering device according to the invention.
FIG. 2 shows a second embodiment of the metering device according to the invention in a representation corresponding to FIG. 1.
FIG. 3 is an illustration corresponding to FIG. 1 of a third embodiment of the metering device according to the invention.
The metering device serves for metering dry bulk material with high precision. The metering device according to FIG. 1 has a storage container 1 for bulk material 2 to be metered. The storage container 1 tapers at the lower end in a cone shape and has a bottom 3 through which an outlet pipe 4 projects into the storage container 1. The outlet pipe 4 has a lower end that is provided with a radially outwardly extending flange 5 which rests against the underside of the bottom 3 of the storage container 1 and is fixedly connected to the bottom 3.
The outlet pipe 4 projects into the lower end of an inner pipe 6 which advantageously has a circular inner cross-section and is arranged centrally within the storage container 1. The inner pipe 6 ends at a spacing from the bottom 3 of the storage container 1. A drive 7 is provided In the inner pipe 6 and drives a metering element 8 in rotation.
The metering element 8 is formed as a coil or helix which extends approximately from the bottom 3 of the storage container 1 upwardly into the inner pipe 6. Here, the metering element 8 is connected fixedly to the drive shaft 9 of the drive 7. The metering element 8 surrounds with a portion of its height the outlet pipe 4.