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US 5,614,094 AGranted
Vibrating screen unit
AssigneeDeister Machine Co., Inc.
InventorsE. Mark Deister, Dale A. Loshe
Life of this patent
Estimating the term…
Abstract
A vibrating screen unit for dewatering dredged material. The vibrating screen unit includes a frame and a top screen deck, a middle screen deck and a bottom screen deck. The middle screen deck includes a splitter which extends across the width of the frame and comprises alternating closed channels and screen rows which alternate across the width of the frame.
Claims43
A screen unit for dewatering material under clean and unclean conditions, comprising:
- a frame having a width;
- a top screen deck coupled to the frame and having a first mesh size, a feed end to receive material, and a discharge end that discharges substantially dewatered material of a size above the first mesh size;
- a middle screen deck coupled to the frame below the top screen deck and having a second mesh size and a discharge end that discharges substantially dewatered material of a size above the second mesh size;
- a bottom screen deck coupled to the frame below the middle screen deck and having a third mesh size and a discharge end that discharges substantially dewatered material of a size above the third mesh size;
- a splitter positioned to lie below the top screen deck for dividing flow of material below the first mesh size between the middle and bottom screen decks, said splitter extending continuously across the width of said frame and comprising alternating closed channels and screen rows which alternate across the width of the frame;
- and
- a water treatment unit coupled to the frame and at least one of the three decks that cleans the material during unclean material conditions.
4 more elements
A screen unit for dewatering material under clean and unclean conditions, comprising:
- a frame having a width;
- top screen means coupled to the frame for separating material below a first size from material above the first size so that material above the first size is discharged from the top screen means at a discharge end of the top screen means, the top screen means having a feed end that receives material;
- middle screen means coupled to the frame below the top screen means for separating material below a second size which is smaller than the first size from material above the second size so that material above the second size is discharged from the middle screen means at a discharge end of the middle screen means;
- bottom screen means coupled to the frame below the middle screen means for separating below a third size which is smaller than the first size from material above the third size so that material above the third size is discharged from the bottom screen means at a discharge end of the middle screen means;
- splitter means positioned to lie below the top screen means for dividing the quantity of material that is processed by the middle and bottom screen means, said splitter means extending continuously across the width of said frame and comprising alternating closed channels and screen rows which alternate across the width of the frame;
- and
- water treatment means coupled to at least one of the screen means for immersing the material in churning water to clean the material during unclean material conditions.
4 more elements
A screen unit for dewatering material under clean and unclean material conditions, comprising:
- a frame having a width;
- a first screen deck coupled to the frame and having a first mesh size, a feed end to receive material and a discharge end that discharges substantially dewatered material of a size above the first mesh size;
- a second screen deck coupled to the frame below the first screen deck and having a second mesh size and a discharge end that discharges substantially dewatered material of a size above the second mesh size;
- a splitter positioned to lie adjacent the feed end of the first screen deck for dividing flow of material between the first and second screen decks, said splitter extending continuously across the width of said frame and comprising alternating closed channels and screen rows which alternate across line width of the frame;
- and
- a water treatment unit coupled to the frame and at least one of the two decks that cleans the material during unclean material conditions.
3 more elements
A screen unit for dewatering material under clean and unclean conditions, comprising:
- a frame having a width;
- fruit screen means coupled to the frame for separating water and material below a first size from material above the first size so that material above the first size is discharged from the top screen means at a discharge end of the top screen means, the top screen means having a feed end that receives dredged material;
- a second screen means coupled to the frame below the first screen means for separating water and material below a second size from material above the second size so that material above the second size is discharged from the second screen means at a discharge end of the second screen means;
- splitter means adjacent the feed end of the first screen means for dividing the quantity of material that is processed by the first and second screen means, said splitter extending continuously across the width of said frame and comprising alternating closed channels and screen rows which alternate across the width of the frame;
- and
- water treatment means coupled to at least one of the screen means for immersing the material in churning water to clean the material during unclean material conditions.
3 more elements
A screen unit for dewatering material under clean and unclean conditions, comprising:
- a frame;
- a top screen deck coupled to the frame and having a first mesh size, a feed end to receive material, and a discharge end that discharges substantially dewatered material of a size above the first mesh size;
- a middle screen deck coupled to the frame below the top screen deck and having a second mesh size and a discharge end that discharges substantially dewatered material of a size above the second mesh size;
- a bottom screen deck coupled to the frame below the middle screen deck and having a third mesh size and a discharge end that discharges substantially dewatered material of a size above the third mesh size;
- a splitter positioned to lie below the top screen for dividing flow of material below the first mesh size between the middle and bottom screen decks;
- a water treatment unit coupled to the frame and at least one of the three decks that cleans the material during unclean material conditions and;
- a trough in one of the three screen decks and a spray bar positioned relative to the trough for directing water from the spray bar into the trough to immerse the material in churning water to help clean the material.
4 more elements
A screen unit for dewatering material under clean and unclean conditions, comprising:
- a frame;
- top screen means coupled to the frame for separating material below a first size from material above the first size so that material above the first size is discharged from the top screen means at a discharge end of the top screen means, the top screen means having a feed end that receives material;
- middle screen means coupled to the frame below the top screen means for separating material below a second size which is smaller than the first size from material above the second size so that material above the second size is discharged from the middle screen means at a discharge end of the middle screen means;
- bottom screen means coupled to the frame below the middle screen means for separating below a third size which is smaller than the first size from material above the third size so that material above the third size is discharged from the bottom screen means at a discharge end of the middle screen means;
- splitter means positioned to lie below the top screen means for dividing the quantity of material that is processed by the middle and bottom screen means;
- water treatment means coupled to at least one of the screen means for immersing the material in churning water to clean the material during unclean material conditions;
- and
- a trough in one of the three screen means and a spray bar positioned relative to the trough for directing water from the spray bar into the trough.
5 more elements
Dependencies are inferred from the claim text.