Method and apparatuses for pre-screening

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United States of America Patent

PATENT NO 11628474
APP PUB NO 20190321856A1
SERIAL NO

16503331

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Importance

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Abstract

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A vibratory screening machine includes a primary screening area and a pre-screening assembly including a frame and screen assemblies. The screen assemblies are secured to the frame and form a pre-screening surface. The frame is attached to the vibratory screening machine such that the concave pre-screening surface is above the primary screening area.

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First Claim

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Patent Owner(s)

Patent OwnerAddress
DERRICK CORPORATION590 DUKE ROAD BUFFALO NY 14225

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Newman, Christian Lakeview, US 29 215
Wojciechowski, Keith Lakeview, US 44 243

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