Moineau pump with rotating outer member

Details Moineau pump with rotating outer member Moineau pump with rotating outer member

1974-09-09

1976-01-13

Vrablik, John J.

Rotary expansible chamber devices

Unlike helical surfaces on relatively wobbling rotating...

418161, 308 363, 308 63, 308 78, F01C 110, F04C 106, F16C 2500, F16C 314

Patent

active

039320723

ABSTRACT:
A pump composed of a gear pair made up of an inner member having at least one external helical thread, and an outer member having internal helical threads, there being one more internal helical thread in the outer member than the number of threads on the inner member. The inner member is free to gyrate but prevented from rotation, and the outer member rotates on its true axis. The outer member is fixed in a tubular casing having at least one aperture for fluid being pumped, and this member extends beyond the gear pair and constitutes a drive shaft for the pump. The tubular casing is disposed in a housing and is arranged for rotation in the housing on suitable bearings and suitable seals. The housing has a port at each end of said gear pair, so that the direction of pumping may be reversed by reversing the direction of rotation of said drive shaft.

REFERENCES:
patent: 3490818 (1970-01-01), Bonner
patent: 3637273 (1972-01-01), Orndorff, Jr.

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