Patent ID: 8007259

Claim:
An eccentric screw pump, said pump comprising: a stator comprising; a stator sleeve extending along a longitudinal axis of said pump; a stator lining disposed in said stator sleeve, said stator lining extending along said longitudinal axis, said stator lining being axially displaceable along said longitudinal axis relative to said stator sleeve, wherein a length of said stator lining along said longitudinal pump axis is varied to uniformly distribute force along said stator, and wherein the stator comprises an elastic material; a flange arranged at a first end of said stator; a pump housing arranged at a second end of said stator; and an adjusting ring, said adjusting ring being axially displaceable relative to said flange and said pump housing along said longitudinal axis; wherein an actuation of said adjusting ring relative to said flange and said pump housing along said longitudinal axis causes said stator lining to deform along said longitudinal axis.