# US 5,706,799 A · Oxygen respirator having CO.sub.2 absorption means > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 5,706,799 A - Document ID: US5706799A - Status: Granted - Kind: A - Application number: 08/517,626 - Filed: 1995-08-22 - Granted: 1998-01-13 - Earliest claimed: 1995-04-20 - Assignees: Kikuchi Seisakusho Co., Ltd. - Inventors: Masayuki Imai; Akira Kato - Web page: https://patentgrep.com/patent/US5706799A ## CPC - A62B 7/08: containing chemicals producing oxygen - A62B: DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING (valves specially adapted for medical use A61M39/00; life-saving devices, apparatus or methods specially adapted for use in water B63C9/00; divers' equipment B63C11/00; specially adopted for use with aircraft, e.g. parachutes, ejector seats, {B64D17/00, B64D25/10}; rescue devices peculiar to mining E21F11/00) ## Abstract An oxygen respirator with safety and simple handling, comprising a body, a small portable-type oxygen cylinder or oxygen generator mounted on the body, a mask, a first hose transferring oxygen from the body to the mask, a tank member mounted on the body for receiving exhalation, a second hose transferring exhalation from the mask to the body, and a carbon dioxide absorbing material charged in the body for removing carbon dioxide from exhalation sent back from the mask to the body. During emergency and evacuation for example in fire, thus, oxygen is transferred to the mask by removing a trigger or the like. The respirator also enables the reuse of exhalation for respiration. Despite of the small size, therefore, the respirator can protect a user from risks such as suffocation for a relatively long period of time. ## Claims ### Claim 1 An oxygen respirator comprising: a body having an oxygen reservoir; oxygen means for supplying oxygen; connection means for connecting the oxygen means for supplying oxygen to the body; a mask to which oxygen incorporated from the oxygen means is transferred; a first hose transferring oxygen from the body to the mask; a tank member mounted on the body for receiving exhalation sent back from the mask to the body; a second hose transferring exhalation from the mask to the body; and carbon dioxide absorbing material charged in the body for removing carbon dioxide from the exhalation transferred back from the mask to the body; wherein the oxygen reservoir is formed on an inner side of a connection means portion of the body, a side of an air outlet of the carbon dioxide absorbing material communicates with the oxygen reservoir in which oxygen is mixed with the exhalation from which carbon dioxide is removed, the carbon dioxide absorbing material is contained in a containment area having an exhalation inlet and an exhalation outlet, and an air circulation chamber having a partition wall is disposed between the exhalation inlet and the exhalation outlet, the air circulation chamber comprising a containing area formed inside the body, whereby the partition wall spaces the exhalation inlet and exhalation outlet at a long interval along the direction of air so that exhalation transferred inside the containment reaches the exhalation outlet via the maximum pathway. ### Claim 2 (depends on 1) The oxygen respirator according to claim 1, wherein the oxygen means for supplying oxygen comprises an oxygen cylinder and the connection means comprises a cylinder mounting part for mounting the oxygen cylinder; the oxygen cylinder being mounted on the cylinder mounting part to release oxygen into the body. ### Claim 3 (depends on 2) The oxygen respirator according to claim 2, wherein an exhalation reservoir is formed in front of the exhalation inlet of the containment area while a pressure adjusting valve for releasing exhalation when the pressure of the exhalation reservoir reaches a predetermined value is mounted on the wall part of the exhalation reservoir. ### Claim 4 (depends on 2) The oxygen respirator according to claim 2, wherein stopper members are engaged with the exhalation inlet and the exhalation outlet in the containing area and by releasing the stopper members, the procedure of respiration can be established. ### Claim 5 (depends on 4) The oxygen respirator according to claim 4, wherein the stopper members engaged with the exhalation inlet and the exhalation outlet are connected in an operable manner to stopper releasing members for release from the outward of the body. ### Claim 6 (depends on 5) The oxygen respirator according to claim 5, wherein an exhalation reservoir is formed in front of the exhalation inlet of the containment area while a pressure adjusting valve for releasing exhalation when the pressure of the exhalation reservoir reaches a predetermined value is mounted on the wall part of the exhalation reservoir. ### Claim 7 (depends on 1) The oxygen respirator according to claim 1, wherein the oxygen means for supplying oxygen comprises an oxygen generating member for generating oxygen, and the connection means comprises a connection part with the oxygen generating member of the body. ### Claim 8 (depends on 7) The oxygen respirator according to claim 7, wherein an exhalation reservoir is formed in front of the exhalation inlet of the containment area while a pressure adjusting valve for releasing exhalation when the pressure of the exhalation reservoir reaches a predetermined value is mounted on the wall part of the exhalation reservoir. ### Claim 9 (depends on 7) The oxygen respirator according to claim 7, wherein stopper members are engaged with the exhalation inlet and the exhalation outlet in the containing area and by releasing the stopper members, the procedure of respiration can be established. ### Claim 10 (depends on 9) The oxygen respirator according to claim 9, wherein the stopper members engaged with the exhalation inlet and the exhalation outlet are connected in an operable manner to stopper releasing members for release from the outward of the body. ### Claim 11 (depends on 10) The oxygen respirator according to claim 10, wherein an exhalation reservoir is formed in front of the exhalation inlet of the containment area while a pressure adjusting valve for releasing exhalation when the pressure of the exhalation reservoir reaches a predetermined value is mounted on the wall part of the exhalation reservoir.