Abstract: A progressing cavity pump comprises a stator having an inlet end for coupling to a fluid-receiving casing, the pump including an anchor element suitable for fastening the inlet end of the stator on a stationary support, and said inlet end and said anchor element including locking means for locking them together in rotation.

Abstract: A pumping device is provided which comprises a Moineau pump with a helical rotor inside a helical cavity of a stator, driver means, and a drive connecting rod coupled by a respective coupling to a driving shaft of the driver and to one end of the rotor. Each coupling comprises a spherical head secured to the connecting rod and housed in a cavity that is cylindrical of revolution with the same diameter as and secured coaxially to the end of the rotor of the driving shaft; and a ball housed partly in a cup of the spherical head with its axis perpendicular to the axis of the connecting rod and partly in a lateral recess of the cavity.

Abstract: Pumping device comprising: a Moineau pump (1) with a helical rotor (2) inside a helical cavity of a stator; drive means; and a drive connecting rod (5) coupled by respective coupling means (6, 7) to a driving shaft (3) of the drive means and to one end of the rotor (2). Each coupling means comprises: a spherical head (12) secured to the connecting rod (5) and housed in a cavity (14) that is cylindrical of revolution with the same diameter as and secured coaxially to the end of the rotor (2)/of the driving shaft (3); and a ball (15) housed partly in a cup (16) of the spherical head (15) with its axis perpendicular to the axis of the connecting rod (5) and partly in a lateral recess (19) of the cavity (14).