Solution pumping system with compressible pump cassette
First Claim
1. A pump cassette for use with an associated pump driver having a reciprocable pump plunger and a plurality of valve actuators, said pump cassette comprising:
- a cassette body comprising a front body member, and a juxtaposed rear body member; and
elastomeric diaphragm means positioned in said cassette body between said front and rear body members,said cassette body and said diaphragm means together providing said pump cassette with at least one liquid inlet, at least one liquid outlet, a liquid flow path for joining said liquid inlet and outlet in fluid communication, and pump means operably driven by the pump plunger of said associated pump driver for pumping liquid from said inlet to said outlet via said flow path,said front and rear body members of said cassette body being joined to each other for limited, relative movement toward each other for effecting compression of said elastomeric diaphragm means when said pump cassette is operably associated with said pump driver.
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Accused Products
Abstract
A solution pumping system includes a compressible pump cassette having front and rear body members, and an elastomeric diaphragm positioned therebetween. The front and rear body members are joined to each other for limited, relative movement, which movement effects compression of the diaphragm. The pump cassette is removably positionable in a pump driver of the system, which can be configured to effect compression of the cassette for use. In this way, the desired compression of the diaphragm during use can be achieved, while avoiding problems associated with compression set or load decay during storage of the cassette prior to use.
340 Citations
15 Claims
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1. A pump cassette for use with an associated pump driver having a reciprocable pump plunger and a plurality of valve actuators, said pump cassette comprising:
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a cassette body comprising a front body member, and a juxtaposed rear body member; and elastomeric diaphragm means positioned in said cassette body between said front and rear body members, said cassette body and said diaphragm means together providing said pump cassette with at least one liquid inlet, at least one liquid outlet, a liquid flow path for joining said liquid inlet and outlet in fluid communication, and pump means operably driven by the pump plunger of said associated pump driver for pumping liquid from said inlet to said outlet via said flow path, said front and rear body members of said cassette body being joined to each other for limited, relative movement toward each other for effecting compression of said elastomeric diaphragm means when said pump cassette is operably associated with said pump driver. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A solution pumping system, comprising:
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a pump driver, including reciprocable pump plunger, and a plurality of valve actuators; and a pump cassette removably positionable in operative association with said pump driver, said pump cassette including a cassette body comprising a front body member and a juxtaposed rear body member, and an elastomeric diaphragm positioned between said front and rear body member, said front body member defining together with said diaphragm at least one liquid inlet, at least one liquid outlet, a liquid flow path for joining said inlet and outlet in fluid communication, and pump means operably driven by the pump plunger of said associated pump driver for pumping liquid from said inlet to said outlet via second flow path when said cassette is positioned in said pump driver, said front and rear portions of said cassette body being joined to each other for limited relative movement toward each other for effecting compression of said elastomeric diaphragm. - View Dependent Claims (10, 11, 12, 13, 14, 15)
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Specification