| 摘要 |
PROBLEM TO BE SOLVED: To provide a pump with a plurality of suction ports and one drain port, capable of carrying out the selection of a fluid supply source by changing over a flow path in the pump depending on the operating direction of the pump. SOLUTION: The pump comprises an impeller 23 rotatably arranged in a pump chamber 31 at its central portion, a motor 10 for rotating the impeller 23, the flow path formed in the pump chamber 31 in communication through two suction ports 32, 33 which suck the fluid with the drain port 34, and a selector valve 41 arranged in a flow path change-over room 40 of the pump chamber 31 so as to be operated with the rotation of the impeller 23 for opening the flow path communicated through the suction port 32 with the drain port 34 or closing the flow path communicated through the suction port 33 with the exhaust port 34 depending on the rotating direction of the impeller 23. COPYRIGHT: (C)2007,JPO&INPIT
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