Respiratory humidifier
Patent 3982095 Issued on September 21, 1976. Estimated Expiration Date: 
September 21, 1993. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
September 21, 1993. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 1116931 1373072 1664333 2082363 2164881 3659604 3757082 3804280 3806102 3864440 InventorAssigneeApplicationNo. 05/403507 filed on 10/04/1973US Classes:392/403, Container with self-contained evaporant supply128/200.11, MEANS FOR PASSING RESPIRATORY GAS THROUGH BODY OF LIQUID BEFORE INHALATION128/204.13, Treating agent evaporated from extended surface absorbent (e.g., sponge, fibrous wick, screen, etc.)219/433, With heating unit unitary with or attached to the stand261/122.1, Submerged screen261/142, Electric heater392/390, With disposable evaporant cartridge or container392/395, With wickD24/110Respirator, vaporizer, or inhalation tube (4)ExaminersPrimary: Bartis, A.Attorney, Agent or FirmInternational ClassesA61M 16/10 (20060101)A61M 16/16 (20060101) AbstractA respiratory humidifier has a base with a thermally controlled heater therein effective to heat a first transfer surface on the top of the base. Removably pressed against the first transfer surface is a second transfer surface forming the bottom of a container into which liquid is admitted, close to the bottom, by a float valve to establish a liquid level. Gas is admitted to the container below the liquid level through an inlet tube and is released from the container above the liquid level through an outlet tube. A porous pad in the container is in the gas flow path between the inlet tube and the outlet tube to provide extended, wettable surface. A float blocks the entrance to the outlet tube when the liquid level rises unduly and a normally closed shunt passage between the inlet tube and the outlet tube opens by differential pressure when the entrance to the outlet tube is blocked. | |
