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US 4,351,627 AGranted
Device with screw conveyor for discharging bulk material
OwnerGeorg L. K. Forsberginventor
Life of this patent
Estimating the term…
Abstract
A device for discharging bulk material so as to effect uniform descent of the bulk material. A rotary screw conveyor is surrounded by an elongated drum, the drum and the screw conveyor being rotated independently of each other and mounted for movement together in a straight line path perpendicular to the axis of rotation of the screw conveyor and drum. The drum is prevented from detrimental deflection during long periods of non-use, and is easy to start up after such long periods of non-use.
Claims28
A device for discharging bulk material from a store thereof, comprising:
- a rotary screw conveyor rotatable about a longitudinal axis, and surrounded by an elongated drum which is rotatable independently of the screw conveyor;
- means providing inlet apertures distributed over the periphery and along the length of the cylindrical face of said drum;
- means for mounting said rotary screw conveyor and drum for movement over a floor in a straight path perpendicular to said longitudinal axis with said drum spaced a predetermined distance from the floor;
- means for powering said conveyor and said drum in said straight path;
- means for effecting rotation of said rotary screw conveyor and said drum;
- and means for preventing detrimental deflection of said drum during long periods of non-use due to settling and compaction of the bulk material, while not interferring with the rotation of and movement of said drum in said straight line path during use, and facilitating rotation of said drum during start-up after a long period of non-use, said means comprising a strip of material disposed on the floor and extending generally in said straight line path, and having an upper surface, said upper surface upstanding from the foor a distance less than the spacing of the drum from the floor during rotation of the drum.
3 more elements
A device for discharging bulk material from a store thereof, comprising:
- a rotary screw conveyor rotatable about a longitudinal axis, and surrounded by an elongated drum which is rotatable independently of the screw conveyor;
- means providing inlet apertures distributed over the periphery and along the length of the cylindrical face of said drum;
- means for mounting said rotary screw conveyor and drum for movement over a floor in a straight path perpendicular to said longitudinal axis with said drum spaced a predetermined distance from the floor;
- means for powering said conveyor and said drum in said straight path;
- means for effecting rotation of said rotary screw conveyor and said drum;
- and means for preventing detrimental deflection of said drum during long periods of non-use due to settling and compaction of the bulk material, while not interferring with movement of said drum in said straight line path during use, and facilitating rotation of said drum during start-up after a long period of non-use, means comprising a rail mounted in the floor generally extending in said straight line path and having a top surface substantially flush with the floor, and a block of low-friction material operatively connected to said rail and upstanding therefrom a distance less than the spacing of said drum from the floor during rotation of said drum.
3 more elements
A device for discharging bulk material from a store thereof comprising:
- a rotary screw conveyor surrounded by an elongated drum which is rotatable independently of the screw conveyor and which is provided with inlet apertures distributed over the periphery and along the length of the cylindrical face of the drum;
- means for mounting said rotary screw conveyor and drum for movement in a straight line path perpendicular to said longitudinal axis with said drum spaced a predetermined distance from the floor and further comprising:
- means for powering the conveyor and drum in said path;
- and means for effecting rotation of said rotary screw conveyor and drum so that said drum apertures, during the combined rotation and linear displacement of the drum, dig into a layer of the bulk material and transfer the material into the drum to be displaced by the screw conveyor to effect uniform descent of the bulk material from the store;
- and
- means for preventing detrimental deflection of said drum during long periods of non-use due to settling and compaction of the bulk material, while not interfereing with movement of said drum in said straight line path during use, and facilitating rotation of said drum during start-up after a long period of non-use, said means comprising a rail mounted in the floor generally extending in said straight line path and having a top surface substantially flush with the floor, and a block of low-friction material operatively connected to said rail and upstanding therefrom a distance less than the spacing of said drum from the floor during rotation of said drum.
3 more elements
A device for discharging bulk material from a store thereof comprising:
- a rotary screw conveyor surrounded by an elongated drum which is rotatable independently of the screw conveyor and which is provided with inlet apertures distributed over the periphery and along the length of the cylindrical face of the drum;
- means for mounting said rotary screw conveyor and drum for movement in the straight line path perpendicular to said longitudinal axis with said drum spaced a predetermined distance from the floor;
- means for powering the conveyor and drum in said path;
- and means for effecting rotation of said rotary screw conveyor and drum so that said drum apertures, during the combined rotation and linear displacement of the drum, dig into a layer of the bulk material and transfer the material into the drum to be displaced by the screw conveyor to effect uniform descent of the bulk material from the store;
- and
- means for preventing detrimental deflection of said drum during long periods of non-use due to settling and compaction of the bulk material, while not interfereing with movement of said drum in said straight line path during use, and facilitating rotation of said drum during start-up after a long period of non-use, said means comprising a strip of material disposed on the floor and extending generally in said straight line path, and having an upper surface, the upper surface of the strip upstanding from the floor a distance less than the spacing of the drum from the floor during rotation of the drum.
3 more elements
Dependencies are inferred from the claim text.