Patent ID: 8556134

Claim:
A cartridge-type single-screw pump adapted to volumetrically batch and deliver a certain amount of a fluid contained inside storage means and to deliver such fluid towards distributing means, the single-screw pump comprising: an external fixed pump body; and a removable pumping cartridge, the removable pumping cartridge being adapted to be inserted into at least one insertion seat of the external fixed pump body in order to operatively cooperate with the external fixed pump body, wherein the removable pumping cartridge comprises: an external housing containing a stator inside, an internal rotor being able to rotate the stator under the action of at least one driving motor; a first inlet opening in the external housing, the first inlet opening being adapted to correspond with a first inlet fluid tube and to communicate the first inlet fluid tube with an interior of the stator when the removable pumping cartridge is inserted into the insertion seat of the external fixed pump body; and the external housing including a second outlet opening, the second outlet opening being adapted to correspond with a second outlet fluid tube and to communicate the interior of the stator with the second outlet fluid tube when the removable pumping cartridge is inserted into the insertion seat of the external fixed pump body, wherein the second outlet opening is a connection nipple equipped with sealing means adapted to be inserted in the second outlet fluid tube.