Moineau pumping device having a ball coupling

Details Moineau pumping device having a ball coupling Moineau pumping device having a ball coupling

2005-11-08

2005-11-08

Trieu, Theresa (Department: 3748)

Rotary expansible chamber devices

Unlike helical surfaces on relatively wobbling rotating...

C418S182000, C464S106000, C464S139000, C464S140000, C464S147000

Reexamination Certificate

active

06962489

ABSTRACT:
A pumping device is provided which comprises a Moineau pump with a helical rotor inside a helical cavity of a stator, driver means, and a drive connecting rod coupled by a respective coupling to a driving shaft of the driver and to one end of the rotor. Each coupling comprises a spherical head secured to the connecting rod and housed in a cavity that is cylindrical of revolution with the same diameter as and secured coaxially to the end of the rotor of the driving shaft; and a ball housed partly in a cup of the spherical head with its axis perpendicular to the axis of the connecting rod and partly in a lateral recess of the cavity.

REFERENCES:
patent: 1551323 (1925-08-01), Offrdahl
patent: 2140295 (1938-12-01), Mallard
patent: 3802803 (1974-04-01), Bogdanov et al.
patent: 4549872 (1985-10-01), Kumpar
patent: 5267905 (1993-12-01), Wenzel et al.
patent: 5688114 (1997-11-01), Millington et al.
patent: 32 05 222 (1983-08-01), None
patent: 195 30 978 (1997-02-01), None

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