Dual chamber pumping apparatus
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United States of America Patent
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-
Feb 26, 1991
Grant Date -
N/A
app pub date -
Aug 15, 1989
filing date -
Aug 15, 1989
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A dual chamber pumping apparatus and method for infusing fluids to a patient includes a disk having a fluid inlet and a fluid outlet. Resilient membranes are attached to opposite sides of the disk to establish dual pumping chambers, and a network of one-way valves connects the fluid inlet in alternating fluid communidation with the pumping chambers. A one-way outlet valve connects the pumping chambers alternately in fluid communication with the fluid outlet. The one-way valves utilize a hollow, elastomeric tube fixedly disposed in passageways within the disk for covering and uncovering respective ports in response to fluid pressure differentials on the inner and outer surfaces of the walls of the hollow, elastomeric tube.
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