Screw pump

Details Screw pump Screw pump

1976-03-29

1977-04-19

Croyle, Carlton R.

Rotary expansible chamber devices

Interengaging rotating members

Three or more

418201, F04C 1712

Patent

active

040185494

ABSTRACT:
A screw pump includes a screw unit having a drive screw and two impeller screws arranged symmetrically around the drive screw. The screws are enclosed in a housing having mutually intersecting passages for accommodating the screws, and the unit is constructed so that the screws seal against each other and against the housing to form chambers in which liquid is carried from the suction side to the pressure side during rotation of the screws. On the pressure side in the passage accommodating one of the impeller screws there is formed a recess which extends from the pressure side and the length of which is such that each chamber is opened at separate time intervals with respect to the two impeller screws instead of simultaneously.

REFERENCES:
patent: 3086474 (1963-04-01), Sennet
patent: 3181472 (1965-05-01), Sennet

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