Liquid infusion apparatus

摘要

In a liquid infusion apparatus having a feed screw driven by a prime mover and a slider movable linearly, which is engaged with said feed screw so as to push a plunger of a syringe for exhausting liquid in the syringe, the improvement characterized by comprising a holding means for holding a flange of a plunger of the slider, which is fixed to a supporting shaft movable in a moving direction of the slider and supported rotatably freely, wherein said supporting shaft is rotated so as to separate said holding means from said flange when said holding means is moved so as to go away from the slider, and said supporting shaft is rotated so as to bring the holding means into engagement with said flange when said holding means is approached to the slider. <IMAGE>