Fluid management system with auxiliary dispensing chamber

Details Fluid management system with auxiliary dispensing chamber Fluid management system with auxiliary dispensing chamber

1991-03-22

1993-03-16

Bertsch, Richard A.

Pumps

Expansible chamber type

Elongated flexible chamber wall progressively deformed

417479, F04B 4308, F04B 4312

Patent

active

051939908

ABSTRACT:
A system that permits highly accurate flow control, even at very low flow rates, by providing a measurement chamber and an auxiliary dispensing chamber having a volume that is variable between fixed maximum and minimum limits. The maximum volume of the dispensing chamber is substantially smaller than the maximum volume of the measurement chamber used in this type of system. The dispensing chamber can then be filled to its maximum volume from the measurement chamber and thereafter caused to be reduced over time to its minimum volume. Because the maximum and minimum volumes of the dispensing chamber are known, the volume change of the dispensing chamber per unit time is determinable and is the flow rate out of the system.

REFERENCES:
patent: 4303376 (1981-12-01), Siekmann
patent: 4657490 (1987-04-01), Abbott

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