A - Human Necessities – 61 – M
Patent
A - Human Necessities
61
M
137/1.521
A61M 16/18 (2006.01)
Patent
CA 1127498
RMR100979 PP39? TITLE SELECTOR VALVE FOR ANESTHESIA MACHINE ABSTRACT A selector valve for providing a choice of one of two vaporizers for use in administering an anesthetic to a patient is disclosed in connection with a manifold for receiving the vaporizers. The selector valve has three positions, wherein the user can utilize one of two vaporizers or place the valve in an off position when neither vaporizer is in the circuit providing a flow of gas to the patient. One of the features comprises a positive position means where the selector valve cannot inadvertently be placed in any position intermediate any two of the three positions so that only one of the three defined positions may be selected. Also, in the off position, leakage is prevented into the gas stream to the patient of anesthetic vapors from either of the vaporizers mounted to the manifold by closing both the inlet to and the out- let from both such vaporizers. Further, in the event one vapor- izer is selected for use, the remaining vaporizer also has its inlet and outlet closed such that no inadvertent leakage of anes- thetic vapor from the "off" vaporizer can reach the path of gas proceeding through the "on" vaporizer and selector valve to the patient. The means of connection and sealing means within the se lector valve further are designed to insure that any seal leakage due to wear will cause the leaking anesthetic vapors to vent to atmosphere and not leak into one of the other active gas paths to the patient.
362695
Airco Inc.
Gowling Lafleur Henderson Llp
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