Safety mask |
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| 申请号 | US34029173 | 申请日 | 1973-03-12 | 公开(公告)号 | US3820538A | 公开(公告)日 | 1974-06-28 |
| 申请人 | NAKANISHI M; | 发明人 | NAKANISHI M; | ||||
| 摘要 | An improved safety mask for an emergency refugee, which broadly comprises a mask body member having upper and lower inside portions mutually segregated by a transverse protrusion extending substantially from the human nose septum to cheekbones, and an oxygen container secured at a lower portion of the body member. The oxygen container is intermittently connected with the inside lower portion of the body member through an oxygen suction valve provided at the central bottom of the body member, which valve is operative to open and shut automatically in response to an inhalation and exhalation of the mask wearer. For the exhaust of the wearer''s exhalation, slits are provided about such portions of the body member as corresponding to the human cheek portions, and for the wearer''s sight, transparent windows and a lighting means are provided. | ||||||
| 权利要求 | 1. A safety mask comprising a main body member, a protrusion on the inside of said main member to segregate upper and lower sections thereof, a pair of transparent window members in the upper body portion spaced from each other at distances like the eye separation of a human being, an oxygen container connected to the lower section of the body member, means to connect the container to the interior of the mask including a jet opening member and an automatic suction valve of elastic character serially connected between the container and the mask interior in a region to provide an oxygen supply into the breathing region of the wearer, a pair of slits located in the body member in the region of the cheeks of the wearer which open outwardly for removal of exhaust in the mask when the interior mask pressure exceeds the outer pressure and opens inwardly for the inhalation of air when the interior mask pressure is substantially less than that of the outer pressure. 2. The mask claimed in claim 1 comprising, in addition, a lighting means supported interiorly of the mask generally centrally and in the upper section generally above the window areas for the wearer''s eyes, and switch means inside the forehead upper section to control the connection and disconnection of the light with operation. |
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| 说明书全文 | |||||||
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