Stator for an eccentric screw pump or an eccentric worm...

Details Stator for an eccentric screw pump or an eccentric worm... Stator for an eccentric screw pump or an eccentric worm...

2008-01-08

2008-01-08

Trieu, Theresa (Department: 3748)

Rotary expansible chamber devices

Unlike helical surfaces on relatively wobbling rotating...

C418S153000, C418S178000, C415S072000, C415S073000, C366S051000, C138S138000, C138S139000, C166S236000

Reexamination Certificate

active

10725967

ABSTRACT:
The invention relates to a stator for an eccentric screw pump or an eccentric worm motor having a stator, including an outer tube that is provided with a lining of rubber or a rubber-like material and has a hollow space, in the shape of a double or multiple spiral, for accommodating a rigid rotor that is also in the form of a spiral, whereby the spiral of the stator has one spiral more than does the motor. To provide a stator that also remains functional under conditions where the fixed connection between the lining and the outer tube would be destroyed, e.g. due to chemical influences or high temperatures, the invention proposes that an inner tube provided with apertures is disposed in the lining, and that spacing strips are disposed between outer tube and inner tube.

REFERENCES:
patent: 4313717 (1982-02-01), Kopecky
patent: 5171138 (1992-12-01), Forrest
patent: 5171139 (1992-12-01), Underwood et al.
patent: 5318416 (1994-06-01), Hantschk et al.
patent: 3119568 (1982-12-01), None
patent: 3322095 (1984-12-01), None
patent: 4403598 (1995-08-01), None
patent: 61180512 (1986-08-01), None

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