PUMPING CASSETTE
1 Assignment
0 Petitions
Accused Products
Abstract
A pump cassette is disclosed. The pump cassette includes a housing having at least, one fluid inlet line and at least one fluid outlet line. The cassette also includes at least one reciprocating pressure displacement membrane pump within the housing. The pressure pump pumps a fluid from the fluid inlet line to the fluid outlet line. A hollow spike is also included on the housing as well as at least one metering pump The metering pump is fluidly connected to the hollow spike on the housing and to a metering pump fluid line. The metering pump fluid line is fluidly connected to the fluid outlet line.
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Citations
41 Claims
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1-22. -22. (canceled)
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23. A fluid pumping cassette comprising:
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a metering pump, the metering pump comprising; a fluid pumping chamber separated from an actuation chamber by a flexible membrane; the actuation chamber having an actuation port for connection to a pneumatic air source to provide positive or negative pneumatic pressure to the flexible membrane; the fluid pumping chamber having a first fluid port, second fluid port, and third fluid port for directing the movement of a fluid; a first fluid valve being interposed between the first fluid port and a first fluid path in the fluid pumping cassette; a second fluid valve being interposed between the second fluid port and a second fluid path in the fluid pumping cassette; and a third fluid valve being interposed between the third fluid port and a third fluid path in the fluid pumping cassette, wherein the metering pump is configured to pump a first fluid from the first fluid path to the second fluid path by operation of the first, second and third fluid valves; and the metering pump is configured to pump a second fluid from the second fluid path to the third fluid path by operation of the first, second and third fluid valves. - View Dependent Claims (24, 25, 26, 27, 28, 29, 30, 31, 32, 41)
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33. A fluid pumping cassette comprising:
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a metering pump, the metering pump comprising; a fluid pumping chamber separated from an actuation chamber by a flexible membrane; the actuation chamber having an actuation port for connection to a pneumatic air source to provide positive or negative pneumatic pressure to the flexible membrane; the fluid pumping chamber having a first fluid port, second fluid port, and third fluid port for directing the movement of a fluid; a first fluid valve being interposed between the first fluid port and a first fluid path in the fluid pumping cassette; a second fluid valve being interposed between the second fluid port and a second fluid path in the fluid pumping cassette; and a third fluid valve being interposed between the third fluid port and a third fluid path in the fluid pumping cassette, wherein the metering pump is configured to pump air from the first fluid path to the second fluid path by operation of the first, second and third fluid valves; and the metering pump is configured to pump a first fluid from the second fluid path to the third fluid path by operation of the first, second and third fluid valves. - View Dependent Claims (34, 35, 36, 37, 38, 39, 40)
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Specification