| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To enable the transfer of fluid with a simple structure where pumping is carried out for a plurality of passages with a single chamber, and to converge or diverge at a predetermined ratio. <P>SOLUTION: A micro hydraulic system 1 is comprised of a chamber 11, a piezoelectric element 34 for increasing and reducing the volume of the chamber, a plurality of passages 22, 23, and 24 connected to the chamber and openings 12, 13 and 14 set to throttle the passage at a plurality of the passages respectively, and formed to feed fluid by changing the ratio of a passage resistance between openings owing to the difference in a degree of a rate of change when increasing and decreasing the volume of the chamber. At least three passages are connected to the chamber as a plurality of the passages. At least one opening set in the passage is set so that the rate of change in passage resistance of the opening differs from another opening when the pressure in the chamber is increased or reduced. <P>COPYRIGHT: (C)2004,JPO&NCIPI</p> |
