Gas supply system
First Claim
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1. A gas control apparatus which comprises (i) a variable volume gas reservoir having an inlet connectable to a gas circulation loop, (ii) an overpressure release means fluidically connected to the reservoir and (iii) a negative pressure safety means fluidically connected to the reservoir.
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Abstract
A method and system for supplying gas to an external machine such as an anaesthetic machine in which gas is supplied to and exits from the machine (3) such that it forms part of a closed gas conduit loop (10) in which there is a variable volume reservoir (7) which adjusts and maintains pressure in the gas supply in the conduit (10) The variable volume reservoir (10) incorporates an excess pressure safety and an under pressure safety valve.
18 Citations
17 Claims
- 1. A gas control apparatus which comprises (i) a variable volume gas reservoir having an inlet connectable to a gas circulation loop, (ii) an overpressure release means fluidically connected to the reservoir and (iii) a negative pressure safety means fluidically connected to the reservoir.
- 12. A method for supplying and controlling a gas supply to a machine in which the gas is fed from a gas conduit loop under pressure into the machine through a machine gas inlet and out of the machine through a machine gas outlet back into the loop in which the machine forms a functional part of the loop, and in which the gas is pumped around the gas conduit loop and in which loop there is sequentially a pump, a pressure accumulator, the machine gas inlet, the machine gas outlet and a variable volume reservoir and in which there is an overpressure release means and a negative pressure safety means fluidically connected to the reservoir.
Specification