| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a liquid jet pump capable of shortening the jet interval during the continuous use, and making light the push-down operating load of a push-down head even during the continuous discharge with the shortened jet interval. <P>SOLUTION: In the push-down head type liquid jet pump with a push-down head 25 having a nozzle being attached to the upper end of a stem 20 inserted in a cylinder 3 in an upwardly urged state, a means for upwardly urging the stem 20 is formed of an elastomer capable of increasing the stem raising speed when using a high-viscosity liquid by increasing the spring elastic deformation resistance in the second half of the push-down stroke from that in the first half. The elastomer is constituted of a spring member 30 consisting of an easily deformable part and a not easily deformable part which is hardly elastically deformed. <P>COPYRIGHT: (C)2009,JPO&INPIT |
