초록 ▼

The present invention provides a system that provides a gas delivery system which is capable of cyclically delivering a selectable volume of gas at a predetermined rate for a predetermined interval. This system is useful as a miniature respirator or as a wearable driver for a pneumatic total artific

The present invention provides a system that provides a gas delivery system which is capable of cyclically delivering a selectable volume of gas at a predetermined rate for a predetermined interval. This system is useful as a miniature respirator or as a wearable driver for a pneumatic total artificial heart. The system comprises compressor means; valve means to direct gas from the compressor to the line; control means to drive the compressor motor and actuate the valve means; means to measure flow rate and determine delivery volume; and means to adjust the compressor speed.

대표청구항 ▼

A system to cyclically deliver a controlled volume of gas through a line including: (a) A variable speed rotary compressor driven by a rotary electric motor to supply pressurized gas; (b) valve means to direct gas from the compressor to the line during the delivery interval of the cycle, and to dive

A system to cyclically deliver a controlled volume of gas through a line including: (a) A variable speed rotary compressor driven by a rotary electric motor to supply pressurized gas; (b) valve means to direct gas from the compressor to the line during the delivery interval of the cycle, and to divert the gas between such intervals; (c) control means to drive the compressor motor and to actuate the valve means said control means including; Means to select and maintain the cycle frequency; Means to select and control the time of the delivery interval; Means to select a reference value of the delivered gas volume; Means to measure the instantaneous flow rate of the gas supplied by the compressor during a delivery interval of the cycle; Means to compute the average flow rate measurement during the delivery interval to provide a computed value of the delivered gas volume; and Means to adjust the compressor speed in the next succeeding delivery interval by an increment related to the difference between the computed value of the delivered gas volume and the reference value of delivered gas volume in a direction to reduce the difference between said delivered gas volume and said reference gas volume.