Piezoelectric displacement unit for a medical hose pump and medical hose pump
AssigneeB. Braun Melsungen AG
InventorStefan Bartsch
Life of this patent
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Abstract
A displacement unit for a medical hose pump and a medical hose pump having such a displacement unit. The displacement unit has linearly movable displacers that can be actuated by a drive device of the displacement unit transversely to a conveying direction against a hose.
Claims14
A displacement unit for a medical hose pump with linearly movable actuatable plungers, which are actuatable with a predetermined sequence by a drive device of the displacement unit for generating a peristaltic movement of a hose or hose portion transversely to the hose or hose portion and against the hose or hose portion in order to squeeze the hose or hose portion, wherein the drive device has linear motors, each of which is coupled to one of the plungers, and at least one of the linear motors being a piezoelectric linear motor,
- each plunger comprising an operating edge configured to face the hose or hose portion, a rear edge opposite the operating edge, and a side edge extending between the operating edge and the rear edge,
- each linear motor configured to apply a pre-stroke force to the side edge of the respective plunger to displace the operating edge toward the hose or hose portion, and
- each linear motor configured to apply a return stroke force to the side edge of the respective plunger to displace the operating edge away from the hose or hose portion.
Dependencies are inferred from the claim text.