Patent ID: 7389801

Claim:
A filling system for an anesthetic evaporator, the filling system comprising: a bottle adapter for being connected to a reservoir for liquid anesthetic, the bottle adapter having an adapter neck and a threaded sleeve for being connected to the reservoir, said adapter neck having an inner adapter neck surface and an outer adapter neck surface, said sleeve being in contact with said inner adapter neck surface; an outer polygonal element defining an outer anesthetic-specific code portion on the adapter neck, said outer polygonal element engaging said outer adapter neck surface; a filling device for anesthetic at the anesthetic evaporator, the filling device including a filler neck in an evaporator housing for receiving the adapter neck, said filler neck having an inner filler neck surface; an inner polygonal element defining an inner anesthetic-specific code portion on the filler neck, said inner polygonal element being located on an inner surface of said filler neck, said inner anesthetic-specific code portion having a design corresponding to that of the outer polygonal element on the adapter neck such that said outer polygonal element is arranged within said inner polygonal element when said adapter neck is inserted into said filling neck; and a hinge connection disposed one of between said adapter neck and said threaded sleeve and between said inner anesthetic-specific code portion on said filler neck and said evaporator housing.