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US 7,578,394 B2Granted
Method and apparatuses for screening
AssigneeDerrick Corporation
InventorsKeith Wojciechowski, Christian Newman
Life of this patent
Estimating the term…
Abstract
A screening machine includes wall members, a screen assembly, and a compression assembly. The screen assembly includes a frame with a plurality of side members and a screen supported by the frame. The compression assembly is attached to at least one wall member and forms the screen assembly into a concave shape.
Claims38
A vibratory screen machine, comprising:
- a wall member;
- a concave support surface;
- a central member;
- a screen assembly including a frame having a plurality of side members and a screen supported by the frame, the screen including a semi-rigid support plate and a woven mesh material on a surface of the support plate;
- a compression assembly attached to an exterior surface of the wall member, the compression assembly including a retractable member that advances and contracts;
- and
- an acceleration arrangement configured to impart an acceleration to the screen assembly,
- wherein as the retractable member advances it pushes the frame against the central member forming the screen assembly into a concave shape against the concave mating surface, the top surface of the screen assembly forming a concave screening surface.
5 more elements
A vibratory screen machine, comprising:
- a screen assembly;
- and
- a compression assembly,
- wherein the compression assembly deforms a top surface of the screen assembly into a concave shape.
1 more element
A screen assembly for a vibratory screening machine, comprising:
- a frame including a plurality of side members;
- and
- a screen supported by the frame,
- wherein the screen assembly is configured to form a predetermined concave shape when subjected to a compression force by a compression assembly of the vibratory screening machine against at least one side member of the screen assembly when placed in the vibratory screening machine.
1 more element
A method for screening materials, comprising:
- attaching a screen assembly to a vibratory screen machine;
- and
- forming a top screening surface of the screen assembly into a concave shape.
Dependencies are inferred from the claim text.