Patent ID: 8070732

Claim:
Holding device for locking the piston head of a syringe on the pusher of a syringe pump, comprising: arms integral each with a pinion pivotable about its axis and movable in translation so as to drive the corresponding arm in a same movement between a rest position in which the arms are â€œclosedâ€ and â€œpressedâ€ against the pusher and an open position in which the arms are â€œopenedâ€ and â€œremovedâ€ from the pusher, the translation being performed before the rotation during the movement toward the open position or in reverse order toward the rest position, a control member, and (i) first means for converting a portion of the movement of the control member by transmitting it to at least one of the pinions in the form of a translation movement and (ii) second means for converting a portion of the movement of the control member by transmitting it to the at least one pinion in the form of a rotation movement, wherein the means for converting and transmitting a portion of the movement of the control member into a translation movement of the at least one pinion are locked in translation, wherein the first and second means are constituted by means for conveying both a translation movement and a rotation movement to the at least one pinion in the movement toward the open position and in the movement toward the closed position, wherein the translation movement is promoted over the rotation movement in the movement toward the open position and the rotation movement is promoted over the translation movement in the movement toward the rest position.