Animal anesthesia machine

Claim 1

Animal anesthetizing apparatus comprising: canister means including an inlet port and an outlet port, means within said canister for receiving carbon dioxide absorbing material positioned intermediate said ports such that the exhaled waste gases from the animal will pass through said material to purge said gases of carbon dioxide and a mixing chamber where said waste gases are mixed with oxygen; bi-directional valve means associated with said ports such that the gases being inhaled and exhaled by the animal can pass through said canister in only one direction, thus defining a closed system having an inhalation portion and an exhalation portion within said canister; oxygen supply means communicating with said mixing chamber for introducing oxygen into said canister; vaporizer means for providing anesthetic to said system, said vaporizer means including first and second vaPorizer units, said first unit being operably connected with said oxygen supply means intermediate said supply means and said mixing chamber, said second unit being operably associated with the inhalation portion of said system and comprising a jar member adapted to contain therein a quantity of liquid anesthetic, a wick positioned in said jar dividing it into two sections, a plate to which said wick is attached, said plate having a pair of apertures therein, each of said apertures communicating with a respective section of said jar and with a compartment separated from said jar by said plate and having inlet and outlet means provided in operable connection with said system and control means for said apparatus including valve means associated with said oxygen supply means and providing an alternate path of communication with said canister whereby the oxygen being supplied will bypass said first unit and enter directly into said mixing chamber where it will be mixed with the waste gases, and additional control means for selectively connecting and disconnecting said second unit to the system, said additional control means including a vane movably mounted within said compartment between said inlet and outlet means, said vane being positionable from a first position in blocking relation to said apertures so that gases may flow directly from said inlet means to said outlet means through said compartment, into a second position where said vane blocks the direct communication between said inlet and outlet means, whereby gases entering said compartment through said inlet means will be channeled into said jar prior to their passage out of said compartment by way of said outlet means whereby when operably connected thereto purged waste gases and anesthetic free oxygen combined in said mixing chamber can then be introduced into said second unit prior to inhalation by the animal; and reservoir means attached to said canister in connection with said chamber.