| 摘要 |
PROBLEM TO BE SOLVED: To reduce force of operating a lever when a feed nozzle with the lever is used to feed a liquid in a liquid feeder including the feed nozzle. SOLUTION: The liquid feeder is designed such that a pressure sensor 4 on a downstream of a pump 2 detects a pressure in a pipe line 8 and the number of revolutions of a motor 3 for driving the pump 2 is reduced in advance when the lever of the feed nozzle 7 is to be opened so that a pressure applied to a valve element of the nozzle 7 is decreased.
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