Patent ID: 8328763

Claim:
Pump for perfusion comprising: a flexible tube equipped with a clamp that can be opened and closed, wherein the clamp is located inside the pump wherein said clamp comprises: a substantially U-shaped band of plastic material, with a free end of a first branch of the U-shaped band bent toward a free end of a second branch of the U-shaped band, called the back, to form the head of the clamp, so that in the closed position, the free end of the back, called the back end, is supported under the free end of the head, called the head end, wherein a surface of the head end overlaps a surface of the back end, whereas in the open position, the back end is above the head end at a distance, a pair of openings spaced so as to accommodate a flexible tube going through the clamp and supported by the clamp, and two opposite protrusions to seal off the flexible tube by compressing the flexible tube when the clamp is in the closed position, means for moving the head end away from the back end in an opening direction parallel to the surfaces where the head end and the back end overlap, by exerting pressure on the head end in the opening direction parallel to the surfaces where the head end and the back end overlap in order to open the clamp when the clamp is in the closed position, and means for locking the head end on the back end in the closed position so as to prevent the head end from moving away from the back end in the opening direction parallel to the surfaces where the head end and the back end overlap, when pressure is exerted only on the head end, and to permit the head end to move in the opening direction parallel to the surfaces where the head end and the back end overlap only after the back end has been moved down from the closed position, a door that can be opened and closed in order to place or take out a flexible tube equipped with a clamp, and means for opening or closing the clamp comprising a pivoting lever equipped with at least one head cam to move the head end away from the back end of the clamp, wherein the lever is equipped with means for unlocking the locking means of the clamp, wherein the lever is additionally equipped with a hook able to cooperate with a roller located on the pump housing in order to keep the door closed, and wherein the door is equipped with a return element that serves to move the hook into the closed position as soon as the clamp opening and closing means have placed the clamp in the open position.