Two-stage pumping apparatus with low shear first stage

Details Two-stage pumping apparatus with low shear first stage Two-stage pumping apparatus with low shear first stage

1989-03-01

1990-07-31

Smith, Leonard E.

Pumps

Diverse pumps

Including rotary nonexpansible chamber type

417900, 4182011, 17 40, F04B 2514, F01C 116, A22C 1102

Patent

active

049446576

ABSTRACT:
A two-stage pumping apparatus is provided with a pump housing through which gross movement of material occurs generally from an infeed opening to a discharge opening. A first stage non-positive displacement helical flight auger is provided in a first stage region above, and coaxial with, one of a pair of second stage augers each having a positive displacement helical flight for engaging the material and for being respectively intermeshed to provide positive displacement pumping.

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Doering Pump Feeders, Jun. 1981 (4 sheets).
CFP-Continuous Filter Press (2 sheets).
Luwa Polymer Technology HS-19 (12 sheets).

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