Ventilation system having true valve control for controlling ventilation pressures
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United States of America Patent
Stats
-
Jan 20, 1987
Grant Date -
N/A
app pub date -
Jun 7, 1985
filing date -
Jun 14, 1984
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A ventilation system with positive and negative ventilation pressures controllable through a control unit is to be improved with respect to its adaptability, in particular in the generation of high pulse repetition frequencies above the natural breathing frequency. A gas transport element is provided in connection with a ring line which contains an inhalation valve in an inspiration branch and an exhalation valve in an expiration branch. The desired improvement is obtained by the fact that the gas transport element is arranged in the ring line with constant direction of delivery. By alternate control of the inhalation valve and exhalation valve in a closed system inspiration and expiration pulses are produced. In addition, a controllable valve unit is indicated in which the inhalation valve and the exhalation valve are actuated as diaphragm valves by combined injector and ejector units of low inertia.
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