FLUID SWITCHING VALVE, FLUID DELIVERY CARTRIDGE, AND FLUID DELIVERY DRIVING UNIT
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United States of America Patent
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app pub date -
Aug 8, 2017
filing date -
Dec 15, 2015
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Abstract
A fluid switching valve including a first elastic tube that delivers a first fluid; a second elastic tube that delivers a second fluid; a third elastic tube having one end connected to the first and second elastic tubes; and a switching member that, by displacing a protruding portion, switches between a first state in which the first elastic tube is constricted and the second fluid is delivered to the third elastic tube, a second state in which the second elastic tube is constricted and the first fluid is delivered to the third elastic tube, a third state in which the first and second elastic tubes are both constricted and introduction of fluid to the third elastic tube is cut off, and a fourth state in which neither the first nor second elastic tube is constricted and both the first and second fluids are delivered to the third elastic tube.
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