Patent ID: 8474451

Claim:
An apparatus for controlling the flow of anesthetic from an anesthetic reservoir comprising: a first component having a base and a nozzle, the base being configured to be sealed and to be affixed to an opening of a reservoir, the nozzle being externally threaded, and wherein a through-hole extends through the base and the nozzle; a second component having an aperture defined by an inner surface of the second component, and wherein the aperture has internal threads for engaging with the external threads of the nozzle; a support member extending into the aperture from the inner surface; a protrusion extending from the support member toward the internal threads, wherein the protrusion is configured to seal the through-hole in the nozzle; a biasing member attached to the first component and the second component and the biasing member biasing the second component relative to the first component to cause the protrusion to seal the through-hole; wherein a fluid in the reservoir may exit the reservoir by way of the through-hole and the aperture; and wherein twisting the first component and second component relative to each other causes the protrusion to seal or unseal the through-hole thereby allowing or preventing the flow of fluid.