Intermittent regulator
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United States of America Patent
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-
May 8, 2001
Grant Date -
N/A
app pub date -
Jun 16, 1999
filing date -
Jun 16, 1999
priority date (Note) -
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status (Latency Note)
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Abstract
An intermittent regulator is provided in which the regulator alternates between supplying partial vacuum to a patient for withdrawing fluids from the body of a patient, and supplying atmosphere to a patient, at a selected intermittent rate, that is adjustable upon adjusting a timing mechanism. The timing mechanism is isolated from communicating with the vacuum being drawn from a patient, separating the regulator into a 'wet' side and a 'dry' side. The regulator includes a piston and spool, each having magnets therein, whereby intermittent motion of the piston controls the motion of the spool and which thereby controls the opening of ports for delivery/non-delivery of vacuum to a patient. An alternative embodiment has porting for sensing occlusion in the patient line and converting the regulator from a continuous-on operation to an intermittent operation. An alternative embodiment has separate air inlet and outlet conduits to atmosphere from the 'dry' side of the regulator.
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