Eccentric screw-type pump with spare stator

Details Eccentric screw-type pump with spare stator Eccentric screw-type pump with spare stator

2006-09-12

2006-09-12

Trieu, Theresa (Department: 3748)

Rotary expansible chamber devices

Unlike helical surfaces on relatively wobbling rotating...

C418S039000

Reexamination Certificate

active

07104770

ABSTRACT:
The present invention relates to the arrangement of a stator and a spare stator. In order to avoid a permanent correction in the length of the driving shaft, the spare stator is connected to the instantaneously operated stator or is configured in a single piece. Upon occurrence of a defined amount of wear, this stator combination is merely reversed through 180° relative to the longitudinal axis or an intermediate tube is inserted so that the spare stator arrives in the rotor region.

REFERENCES:
patent: 2957427 (1960-10-01), O'Connor
patent: 3286642 (1966-11-01), Lindberg
patent: 4580955 (1986-04-01), Karge
patent: 5472319 (1995-12-01), Rohlfing et al.
patent: 5807087 (1998-09-01), Brandt et al.
patent: 1985861 (1968-05-01), None
patent: 3345233 (1985-06-01), None
patent: 1 189 319 (1959-10-01), None

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