Expandable, inner liner pump

A pump system, comprising:

• a primary pump that pumps a primary fluid, the primary pump comprising a first pump unit comprising:
• an inner liner that is expandable, an interior of which defines a primary fluid chamber, the primary fluid chamber comprising an inlet and an outlet;
• an intermediate liner disposed around the inner liner, an interior of the intermediate liner and an exterior of the inner liner defining an intermediate chamber;
• an outer liner disposed around the intermediate liner, an interior of the outer liner and an exterior of the intermediate liner defining at a secondary fluid chamber;
• and
• a non-return valve coupled to the intermediate chamber and configured to allow air within the intermediate chamber to escape;
• and
• a secondary pump that operably pumps a secondary fluid into and out of the secondary fluid chamber, resulting in the compression and expansion of the inner liner such that the primary fluid travels into the primary fluid chamber via the inlet as the inner liner expands and out of the primary fluid chamber via the outlet as the inner liner compresses.

A pump system, comprising:

• a primary pump that pumps a primary fluid and comprises a first pump unit, the first pump unit comprising:
• an inner liner that is expandable, an interior of which defines a primary fluid chamber, the primary fluid chamber comprising an inlet and an outlet;
• and
• an outer liner disposed around the inner liner, an interior of the outer liner defining at least a portion of a secondary fluid chamber, the secondary fluid chamber comprising a first fluid port and a second fluid port;
• a secondary pump that pumps a secondary fluid in a cyclical flow path, the secondary pump in fluid communication with the secondary fluid chamber of the first pump unit to operably pump the secondary fluid into the secondary fluid chamber via the first fluid port and out of the secondary fluid chamber via the second fluid port, resulting in the compression and expansion of the inner liner of the first pump unit;
• and
• a secondary fluid sump in fluid communication with the secondary pump and in fluid communication with the secondary fluid chamber to receive the secondary fluid from the secondary fluid chamber, and the secondary fluid sump operably providing the secondary fluid to the secondary pump.