Continuous Multi-Fluid Pump Device, Drive and Actuating System and Method

A selector valve for a medical fluid delivery device comprising:

• a valve bore in fluid communication with an outlet channel;
• a first outlet port;
• a second outlet port;
• and
• a selector valve body comprising a valve stem located within the valve bore and having a flow passage, wherein the selector valve body is adapted to place the flow passage in fluid communication with one of the first outlet port, the second outlet port, and a shut-off position,
• wherein the flow passage comprises a sealing arrangement selected from the group consisting of a lip seal arrangement, an elastomeric core disposed within a thin-walled valve stem, a plurality of O-ring seals, a segmented valve stem having a plurality of finger elements disposed between radial ridges of a cooperating sleeve, a valve stem having a lower portion of a compliant material and a an upper portion of a stiff material, an inner liner of a compliant sealing material seated within the valve bore between an outer valve cylinder wall and the valve stem, and combinations thereof.

A fluid delivery system comprising:

• a fluid delivery device;
• and
• an outlet selector valve comprising:
• a valve bore in fluid communication with the fluid delivery device;
• a first outlet port;
• a second outlet port;
• and
• a selector valve body comprising a valve stem located within the valve bore and having a flow passage, wherein the selector valve body is adapted to place the flow passage in fluid communication with one of the first outlet port, the second outlet port, and a shut-off position,
• wherein the flow passage comprises a sealing arrangement selected from the group consisting of a lip seal arrangement, an elastomeric core disposed within a thin-walled valve stem, a plurality of O-ring seals, a segmented valve stem having a plurality of finger elements disposed between radial ridges of a cooperating sleeve, a valve stem having a lower portion of a compliant material and a an upper portion of a stiff material, an inner liner of a compliant sealing material seated within the valve bore between an outer valve cylinder wall and the valve stem, and combinations thereof.