Adaptor for releasably mounting a vaporizer on an anesthesia machine

An adaptor for use with an anesthesia machine arranged to have a first, second and third gas flow units removably mounted thereon by an interlock/exclusion system, each of the gas flow units being arranged to be opened to enable the machine to provide a gas to a patient, the interlock/exclusion system comprising vertically oriented pins associated with respective ones of the gas flow units, the vertically oriented pins being coupled together, whereupon when one of the gas flow units is opened the vertically oriented pin associated with it is moved downward and the vertically oriented pins of the other gas flow units are moved upward to preclude the opening of those gas flow units, said adaptor being arranged to be mounted on the interlock/exclusion system and coupled to one of the vertically oriented pins for releasably mounting one of said gas flow units on the machine, that gas flow unit having a horizontally oriented pin arranged to move horizontally outward therefrom when the gas flow unit is opened, said adaptor being constructed to couple the outward motion of the horizontally oriented pin to the said one vertically oriented pin of the interlock/exclusion system to move the said one pin downward, whereupon the interlock/exclusion system operates to cause the other vertically oriented pins to extend upward and thereby prevent the opening of the other two vaporizers.