Patent ID: 9540933
Date: 2017-01-10
CPC Classifications: B23P,F01C,F04B,F04C,Y10T

Claim:
1. A stator for a progressive cavity pump or motor, comprising: a stator housing having a longitudinal axis; and a stator insert of a material moulded within the housing; wherein the stator housing includes, plurality of axially-spaced annular grooves in the inner surface of the outer tube, wherein the plurality of parallel rods cross over the plurality of annular grooves; wherein a conjunction of the plurality of parallel rods and the plurality of annular grooves defines a plurality of chambers, wherein each chamber is disposed in one of the plurality of annular grooves under one of the plurality of parallel rods, wherein the material of the stator insert extends into the plurality of chambers whereby the material of the stator insert is mechanically fixed axially, radially and torsionally within the outer tube.