Pumping cassette
First Claim
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1. A liquid handling pump cassette comprising:
- a housing having a first plate spaced apart from a second plate, the first plate forming a first face of the housing and the second plate forming an opposing second face of the housing, and each plate having a corresponding perimeter defining one or more ends of the housing, the housing comprising;
a liquid inlet line positioned at an end of the housing and a liquid outlet line positioned at an end of the housing;
a first reciprocating membrane pump within said housing, said first pump being arranged to pump a first liquid from said liquid inlet line to said liquid outlet line via a first flow path within said housing;
a secondary fluid port on said housing, said secondary fluid port communicating through the first face of the housing with a second flow path in the housing; and
a second pump, said second pump being arranged to pump fluid through said secondary fluid port via the second flow path within the housing, whereinsaid second flow path is in fluid communication with said liquid outlet line.
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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
32 Claims
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1. A liquid handling pump cassette comprising:
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a housing having a first plate spaced apart from a second plate, the first plate forming a first face of the housing and the second plate forming an opposing second face of the housing, and each plate having a corresponding perimeter defining one or more ends of the housing, the housing comprising; a liquid inlet line positioned at an end of the housing and a liquid outlet line positioned at an end of the housing; a first reciprocating membrane pump within said housing, said first pump being arranged to pump a first liquid from said liquid inlet line to said liquid outlet line via a first flow path within said housing; a secondary fluid port on said housing, said secondary fluid port communicating through the first face of the housing with a second flow path in the housing; and a second pump, said second pump being arranged to pump fluid through said secondary fluid port via the second flow path within the housing, wherein said second flow path is in fluid communication with said liquid outlet line. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 27)
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24. A liquid handling pump cassette comprising:
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a housing having a first plate spaced apart from a second plate, the first plate forming a first face of the housing and the second plate forming an opposing second face of the housing, and each plate having a corresponding perimeter defining one or more ends of the housing, the housing comprising; a first liquid inlet line positioned at an end of the housing and a liquid outlet line positioned at an end of the housing; a first reciprocating membrane pump within said housing, first pump being arranged to pump a first liquid from said first liquid inlet line to said liquid outlet line via a first flow path within said housing; a second flow path within said housing, said second flow path being in fluid communication with the first flow path and comprising; a metering membrane pump; a second liquid inlet line for pumping a volume of a second liquid into said liquid outlet line, said second liquid inlet line entering the housing through the first face of said housing; a hollow spike in fluid communication with said second liquid inlet line; and an air vent in fluid communication with said second liquid inlet line, wherein said metering membrane pump is configured to infuse a quantity of a second liquid via the hollow spike into the first flow path. - View Dependent Claims (25, 26, 28)
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29. A liquid handling pump cassette comprising:
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a housing having a first plate spaced apart from a second plate, the first plate forming a first face of the housing and the second plate forming an opposing second face of the housing, and each plate having a corresponding perimeter defining one or more ends of the housing, the housing comprising; a first liquid inlet line positioned at an end of the housing and a liquid outlet line positioned at an end of the housing; a first reciprocating membrane pump within said housing, said first pump being arranged to pump a first liquid from said first liquid inlet line to said liquid outlet line via a first flow path within said housing; a second flow path within said housing, said second flow path being in fluid communication via a first valve with the first flow path and comprising; a metering membrane pump; a second liquid inlet line for pumping a volume of a second liquid into the liquid outlet line, the second liquid inlet line entering the housing through the first face of the housing and in fluid communication with the second flow path via a second valve; a hollow spike in fluid communication with the second liquid inlet line; and an air vent in fluid communication with the second flow path via a third valve, wherein the metering membrane pump is configured to infuse a quantity of a second liquid via the hollow spike into the first flow path. - View Dependent Claims (30, 31, 32)
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Specification