| 摘要 |
<P>PROBLEM TO BE SOLVED: To improve feeding performance of working liquid without generating an air reservoir, even if a limit switch is stored inside. Ž<P>SOLUTION: A liquid amount detecting part 19 of a reservoir tank 5 has a float 23 provided with a magnet 22 to turn ON/OFF the limit switch 24 and vertically moving according to a liquid level of the working liquid. The limit switch 24 is provided on an upper side of the magnet 22. A limit switch mounting part 26 for mounting the limit switch 22 is provided in an upper end internal surface of an upper half body 9 of the reservoir tank 5. A liquid flow passage 27 is provided between the upper end internal surface of the upper half body 9 and an upper end face of the limit switch mounting part 26. When the working liquid is supplied, air in the reservoir tank 5 is made to flow to a working liquid injection port 10 through the liquid flow passage 27. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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