| 摘要 |
PURPOSE:To provide a light hydraulic pump with simple construction by connecting an elastic body made of a shape memory alloy to a pump driving body for inducing a change in volume while providing returning means opposed to the elastic body. CONSTITUTION:When a switch 20 is closed and a switch 18 is opened to supply current to an intake elastic body 10 made of a shape memory alloy, the intake elastic body 10 is heated to extend when the temperature thereof exceeds a predetermined one. Thus, an idle plate 4 is depressed to reduce the volume of a bellows 3 while the remaining volume of a pump casing 1 is increased to suck liquid 21 from an intake line 14. When, next, the switch 20 is opened and the switch 18 is closed, a discharge elastic 8 is heated to extend when the temperature thereof exceeds a predetermined one. Thus, the idle plate 4 is pushed up to increase the volume of bellows 3, while the remaining volume of the pump casing 1 is reduced and liquid corresponding to the decrement of volume is discharged from a discharge line 16.
|
