Plural inlet pumping cassette with integral manifold

An integral disposable manifold and pump cassette through which fluid is pumped from a plurality of inlet tubes through a single outlet, the integral disposable manifold and pump cassette consisting of a first sheet of flexible plastic material and a second sheet of flexible plastic material sealed together to form therebetween:

• a plurality of inlet channels sealingly connected to and in fluid communication with the inlet tubes, wherein the inlet channels can be individually pinched closed to prevent the flow of fluid therethrough;
• a main flow channel which extends between the inlet channels and the outlet, the main flow channel including a first flexible diaphragm pumping chamber and a second flexible diaphragm pumping chamber, with the second flexible diaphragm pumping chamber positioned between the first flexible diaphragm pumping chamber and the outlet, the inlet channels together having a single junction with the main flow channel bringing the inlet channels into fluid communication with the main flow channel;
• and
• a flange generally surrounding the inlet channels and the main flow channel, the first sheet of flexible plastic material defining a first flexible diaphragm surrounded by the flange to form a portion of the first flexible diaphragm pumping chamber, and a second flexible diaphragm surrounded by the flange to form a portion of the second flexible diaphragm pumping chamber.

An integral disposable manifold and pump cassette through which fluid is pumped from inlet tubes, the integral disposable manifold and pump cassette consisting essentially of a first sheet of flexible plastic material and a second sheet of flexible plastic material sealed together to form therebetween:

• a plurality of inlet channels;
• a main flow channel which extends between the inlet channels and an outlet, the inlet channels together having a single junction with the main flow channel bringing the inlet channels into fluid communication with the main flow channel;
• and
• a flange generally surrounding the inlet channels and the main flow channel, wherein the sealed inlet channels extend between the inlet tubes and the main flow channel, wherein the inlet channels can be individually pinched closed to prevent the flow of fluid therethrough, wherein the main flow channel includes a first flexible diaphragm pumping chamber and a second flexible diaphragm pumping chamber, wherein the second flexible diaphragm pumping chamber is positioned between the first flexible diaphragm pumping chamber and the outlet, wherein the first sheet of flexible plastic material has a first flexible diaphragm surrounded by the flange to form a portion of the first flexible diaphragm pumping chamber, and wherein the first sheet of flexible plastic material has a second flexible diaphragm surrounded by the flange to form a portion of the second flexible diaphragm pumping chamber.

An integral disposable manifold and pump cassette through which fluid is pumped from inlet tubes, the integral disposable manifold and pump cassette forming a single disposable cassette which may be inserted into a single pump housing, the cassette consisting of:

• a first sheet of flexible plastic material;
• and
• a second sheet of flexible plastic material, the first and second sheets of flexible plastic material being sealed together to form therebetween:
• a plurality of inlet channels formed between the first and second sheets of flexible plastic material, the inlet channels being connectable to the inlet tubes for fluid passage therethrough and can be individually pinched closed to prevent fluid passage therethrough;
• a main flow channel formed between the first and second sheets of flexible plastic material, the main channel connecting the inlet channels to an outlet tube, the inlet channels together having a single junction with the main flow channel bringing the inlet channels into fluid communication with the main flow channel;
• and
• a flange formed by the first and second sheets of flexible plastic material, the flange generally surrounding the inlet channels and the main channel, the flange facilitating the insertion and removal of the single disposable cassette to and from the pump housing.