Extrusion-type liquid delivery apparatus

Abstract

An extrusion-type liquid delivery apparatus according to the present invention comprises: a plunger mover to move a plunger; a plunger mover driver to move the plunger mover; a pair of hooks rotatably mounted on the plunger mover with the bent ends projecting from the plunger mover, and having slopes at the bent ends; a spring to close the bent ends of the pair of hooks by spring force; and a clamp to block a liquid delivery channel connected to a container.

1 . An extrusion-type liquid delivery apparatus, wherein a liquid in a container having a liquid delivery portion at one end of the container is extruded by a plunger that is inserted from the other end of the container, comprising: 
 a) a plunger mover to move said plunger;    b) a plunger mover driver to move said plunger mover;    c) a pair of hooks rotatably mounted on said plunger mover with bent ends projecting from said plunger mover, and having slopes at said bent ends;    d) a spring to close said bent ends of said pair of hooks by spring force; and    e) a clamp to block a liquid delivery channel connected to said container.    
   
   
       2 . The extrusion-type liquid delivery apparatus of  claim 1 , further comprising a manual release means to rotate said hooks against the spring force of said spring.  
   
   
       3 . The extrusion-type liquid delivery apparatus of  claim 1 , further comprising a plunger grip detecting means to detect whether or not said plunger is gripped.  
   
   
       4 . The extrusion-type liquid delivery apparatus of  claim 1 , further comprising a means to lower the inner pressure of said container after said hooks have gripped said plunger.  
   
   
       5 . The extrusion-type liquid delivery apparatus of  claim 4 , further comprising a control device to move said plunger mover by a predetermined distance in the direction opposite to the direction of pushing said plunger, after said hooks have gripped said plunger.