Leak detector
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United States of America Patent
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-
Sep 3, 1991
Grant Date -
N/A
app pub date -
Mar 14, 1989
filing date -
Mar 14, 1989
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A system for detecting leakage in a device having a fluid-driven membrane inserted in the body, for example, a balloon pump, includes a fluid drive circuit with a moisture remover having a capacity just sufficient to remove water vapor entering the circuit due to intrinsic permeability of the membrane. An in-line humidity sensor responds quickly to an increase in vapor pressure, indicating a leak, and activates a shut-down circuit to prevent leakage of the drive fluid into the body. The system is employed in a balloon pump driven by a pulsating air source.
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