| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a pump unit and a container which are capable of increasing a liquid delivery, preventing a liquid flow during transfer or non-used time or the like and checking a decline of performance due to long-lasting compression by a bellows. <P>SOLUTION: The pump unit 10 sucks a liquid out of a container body 12 inserted in the container body 12. The unit is equipped with a suction pipe 23 to be inserted in the container body 12, a bellows 24 that recovers an extended direction serially connected with an upper part thereof, a piston to be connected with the upper part for sucking the liquid out of the container body 12 by expanding and contracting the bellows 24 and a case 16 hermetically housing a lower part of the piston and the bellows 24 and permitting the piston to be slidably incorporated. The bellows 24 is provided with a first communicating hole 29 serially connected with the insides of the bellows 24 and the case 16, and the piston is provided with a second communicating hole 30 serially connected with the insides of the case 16 and the piston, respectively. <P>COPYRIGHT: (C)2004,JPO |
