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...

2006-11-07

2006-11-07

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

07131827

ABSTRACT:
The invention relates to a stator for an eccentric screw pump or an eccentric worm motor, including an outer tube that is provided with a lining of rubber or a rubber-like material and has a hollow space or cavity, 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 stator has one spiral more than does the motor. So that the stator also remains functional under conditions where the fixed connection between the lining and the outer tube could be destroyed, e.g. due to chemical influences or high temperatures, the invention proposes disposing two inner tubes that have apertures in the lining.

REFERENCES:
patent: 2700936 (1955-02-01), Sackett
patent: 2862454 (1958-12-01), Alcock
patent: 3139035 (1964-06-01), O'Connor
patent: 3300811 (1967-01-01), Berger
patent: 3435772 (1969-04-01), Schlecht
patent: 5171139 (1992-12-01), Underwood et al.
patent: 2541779 (1977-03-01), None
patent: 4403598 (1995-08-01), None
patent: 61180512 (1986-08-01), None

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