Rotary diaphragm pump

Details Rotary diaphragm pump Rotary diaphragm pump

1974-09-23

1976-04-20

Vrablik, John J.

Rotary expansible chamber devices

Multistage

418 15, 418 45, 418153, 418220, 259 95, F01C 508, F01C 2108, F04C 500, B01F 512

Patent

active

039515761

ABSTRACT:
The rotation of a helix within a deformable tube which is located within and attached by the ends to a pump casing of circular cross section causes fluid to flow between the tube and pump casing when the tube contains at least one longitudinal rib continuously connected to the pump casing. Changes in the cross sectional area of the pump casing and changes in the configuration of the helix permits additional fluid to be drawn into the fluid stream or a portion of such fluid to be discharged from the space between the deformable tube and the pump casing at the transitions in cross sectional areas of the pump casing or changes in configuration of the helix.

REFERENCES:
patent: 1701103 (1929-02-01), Egy
patent: 2523588 (1950-09-01), Ormsby
patent: 3229643 (1966-01-01), Roudaut
patent: 3693842 (1972-09-01), Cozzarin et al.

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