4. Classifying, separating, and assorting solids
  5. Sifting
  6. Concave and convex sifters

H. William Derrick, Jr.

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Flow divider

Fluid handling – Systems
Patent

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Multiple screen apparatus

Classifying – separating – and assorting solids – Sifting – Plane sifters
Patent

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Non-clogging screen apparatus

Classifying – separating – and assorting solids – Sifting – Concave and convex sifters
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Vibratory screening machine and non-clogging wear-reducing scree

Classifying – separating – and assorting solids – Sifting – With liquid treatment
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