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    • 3. 发明专利
    • WATER PUMP
    • JPS55125395A
    • 1980-09-27
    • JP3286779
    • 1979-03-20
    • AISIN SEIKI
    • OOSUGI TAKESHISUZUKI TOSHIOKONDOU TOSHIYUKINAKANE TAKESHI
    • F04D29/02F04D29/24
    • PURPOSE:To eliminate a loss of the drive power required for the pump, by using a shape storage metal for the impeller substance and changing a shape of the impeller substance and changing a shape of the impeller due to the water temperature. CONSTITUTION:An impeller 1 is constructed by piling together a first shape storage metal 8 changing into a maternal phase construction at the high temperature side and a martensite construction at the low temperature side and a second shape storage metal 9 changing into the martensite construction at the high temperature side and the maternal phase construction at the low temperature side, and fixed by screws 10. At a high temperature, a deformed shape is presented to give a resistance to the water performing a pumping action, while at a low temperature, the shape storage metal 8, being of the martensite construction, is deformed by an encounter with the water resistance due to the rotation of the impeller causing its shape to be of no pumping action, thus to eliminate a loss of the drive power.