Liquid supply device
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United States of America Patent
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Dec 10, 2013
Grant Date -
Oct 20, 2011
app pub date -
Apr 8, 2011
filing date -
Apr 20, 2010
priority date (Note) -
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status (Latency Note)
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Abstract
A drive characteristic and durability of a liquid supply device having a flexible pump member such as a bellows are improved. A drive pump in the liquid supply device has a bellows as the pump member that is elastically deformed axially by a drive rod. A drive pump chamber and a communication chamber are formed by the bellows and the housing, and the communication chamber and the drive pump chamber are partitioned by the orifice member. At a drive operation time of the drive rod, the through hole is blocked by the valve member, and a liquid flows in between the communication chamber and the drive pump chamber via a communication gap formed between the orifice member and an inner circumferential face of the housing.
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