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CA1109766A Expired / Lapsed CA ⏱️ 0.0 years remaining

Gas ventilating device

Assignee: Individual
•
Filing: 1980-11-07
•
Granted: 1981-09-29
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Expires: 2000-11-07
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Abstract

Abstract TITLE GAS VENTILATING DEVICE INVENTOR John Phillip STRUPAT ABSTRACT The invention discloses a gas ventilating device where the tidal volume during the inhalation phase of any cycle of patient consumption is constant and fixed; hence, the deliverable volume is independent of the head pressure of the supply source of the gas. Further, the tidal volume can be controlled by altering the differential pressure of the gas in a fixed volume tank which acts as an intermediate storage tank for gas. Control means, using fluidic devices including monostable and bistable devices control the charging and discharging of the fixed volume tank with gas so that the fixed volume of gas can be supplied to the patient.

Inventors

  • 👤 John P. Strupat

Bibliographic Details

Application Number —
Jurisdiction CA
Data Source google_patents
Last Synchronized 2026-10-23 14:38
CPC Classifications
A; A61; A61M; A61M16/00

Claims Analysis

Total Claims: 6
Claim 1
Independent Claim 138 words
An apparatus for ventilating a patient with a given volume of fluid comprising: (a) a source of fluid under pressure; (b) a tank of fixed volume; (c) delivery means for delivering a fixed volume of fluid at a predetermined pressure to the patient; (d) first passage means extending from the source to said tank in a normally open state; (e) second passage means extending from said tank to said delivery means in a normally closed state; (f) sense and switch means for sensing a high point and a low point in the pressure in the tank and at each point reversing the states of the first and second passage means whereby, in the first state fluid flows from the source into the tank and in the second state from the tank through the delivery means to the patient.
Claim 2
Independent Claim 138 words
An apparatus for ventilating a patient with a given volume of fluid comprising: (a) a source of fluid under pressure; (b) a tank of fixed volume; (c) delivery means for delivering a fixed volume of fluid at a predetermined pressure to the patient; (d) first passage means extending from the source to said tank in a normally open state; (e) second passage means extending from said tank to said delivery means in a normally closed state; (f) sense and switch means for sensing a high point and a low point in the pressure in the tank and at each point reversing the states of the first and second passage means whereby, in the first state fluid flows from the source into the tank and in the second state from the tank through the delivery means to the patient.
Claim 3
Dependent Claim 21 words
The apparatus as claimed in claim 1 wherein the parts of the first and second passage means are a common passage.
Claim 4
Dependent Claim 114 words
The apparatus as claimed in claim 2 additionally comprising a pressure sensing conduit communicating with the tank and to 1st and 2nd pressure responses switch means, said first pressure response switch means generating the signal when the pressure in the tank is above a high pressure reference point, said second pressure response switch means generating a signal when the pressure in the tank is below the low pressure reference point, each signal communicating to a bi-stable switch responsive to generate and to reverse its output on receipt of one of said signals whereupon the state of the output of the bistable switch determines the normally open state or closed state of both passage means.
Claim 5
Dependent Claim 19 words
The apparatus as claimed in claim 3 wherein the first and second pressure responses switch means are fluidic devices.
Claim 6
Dependent Claim 17 words
The apparatus as claimed in claim 3 or 4 wherein the bi-stable switch is a fluidic device.

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