Patent ID: 9408995
Filing Date: 2016-08-09
CPC Classification: A61M,Y02C

Claim Text:
1. A system for administering nitrous oxide and oxygen, comprising: a fluid control system for controlling a flow of nitrous oxide and oxygen; a nitrous oxide and oxygen supply fluidly connected to the fluid control system; a vacuum source fluidly connected to the fluid control system; a safety scavenge system connected to the fluid control system, the safety scavenge system comprising: a mass airflow sensor for reading scavenging vacuum pressure fluidly connected to the vacuum source; a master controller in electrical communication with the mass airflow sensor for receiving the scavenging vacuum pressure reading from the mass airflow sensor which is compared to one or more predetermined ranges; and a nitrous oxide valve fluidly connected to the nitrous oxide supply and in electrical communication with the master controller which shuts off the nitrous oxide valve when the scavenging vacuum pressure is less than the one or more predetermined ranges; wherein the fluid control system further comprises: a flow controlling valve at a joint between the first intake conduit and a first output conduit, the flow controlling valve allowing the first intake conduit and the first output conduit to be in selective fluid connection; a differential pressure regulator having a first chamber and a second chamber, the first chamber being fluidly connected with the first output conduit, and the second chamber being fluidly connected with the second intake conduit; the second chamber of the differential pressure regulator being selectively fluidly connectable with a second output conduit; the first and second chamber being separated by a wall, the wall being spring biased to a first position in which the second intake conduit is not fluidly connected with the second output conduit, and the wall being displaceable to an open position in which the second intake conduit is fluidly connected with the second output conduit; a ratio controlling valve on the second output conduit; a combined flow conduit having a first end that is fluidly connected with the first output conduit and the second output conduit; and a display unit showing a first flow through the first output conduit, the display unit displaying a second flow through the second output conduit.