초록 ▼

The present invention relates to a respiration valve (401) for performing respiration tests on e.g. humans, consisting of at least three ports, a first mouth port (402) and two breathing ports (403, 404). The breathing ports (403, 404) comprise pneumatic pinch valves consisting of a channel (101) wi

The present invention relates to a respiration valve (401) for performing respiration tests on e.g. humans, consisting of at least three ports, a first mouth port (402) and two breathing ports (403, 404). The breathing ports (403, 404) comprise pneumatic pinch valves consisting of a channel (101) with a flexible wall (201) to be used for the flow of material and molded as an integrated part of a surrounding chamber (102). The flexible wall (201) comprises two opposing angularly interconnected wall segments (202) which are angularly connected at interconnection points (203) and which flexible wall (201) is pinched by a pressure from fluid, such as air, introduced into the chamber (102). The cross sectional shape corresponds in one embodiment approximately to a elongated hexagon. The construction of the respiration valve (401) comprising these pneumatic pinch is valves enables a very small, light, hygienic, and safe yet inexpensive construction with a long life expectancy. The respiration valve (401) is preferably completely or partially made of silicone rubber.

대표청구항 ▼

1. A respiration valve 401 to be used for performing respiration tests on humans, wherein said respiration valve comprises at least three ports, a first mouth port 402 and two or more breathing ports 403 and 404,wherein said breathing ports comprise valves to control flow through said breathing port

1. A respiration valve 401 to be used for performing respiration tests on humans, wherein said respiration valve comprises at least three ports, a first mouth port 402 and two or more breathing ports 403 and 404,wherein said breathing ports comprise valves to control flow through said breathing ports and wherein at least one of said valves is a pneumatic pinch valve comprising a channel 101 with a flexible wall 201 to be used for said flow,said channel 101 being molded as an integrated part of a surrounding chamber 102, andwhere said flexible wall 201 of the channel 101 comprises two opposing angularly interconnected wall segments 202 being angularly connected at interconnection points 203 and wherein said two wall segments are pinched towards each other and close the channel completely based on pressure 103 from fluid introduced into said chamber, said pressure acting approximately equally on said two opposing angularly interconnected wall segments 202. 2. A respiration valve 401 according to claim 1, wherein each of said breathing ports comprises one valve. 3. A respiration valve 401 according to claim 1, wherein one of said breathing ports is connected to the atmospheric air and another of said breathing ports is connected to a rebreathing bag. 4. A respiration valve 401 according to claim 1, wherein said segments 202 in said pneumatic pinch valve are angularly connected with an acute angle 205 between said wall segments. 5. A respiration valve 401 according to claim 1, wherein said channel in said pneumatic pinch valve has a cross sectional elongated shape, whereby the distance between said interconnection points 203 are larger than the distance between said two opposing wall segments 202. 6. A respiration valve 401 according to claim 5, wherein said cross sectional elongated shape in said pneumatic pinch valve approximately corresponds to a hexagon 301, a rhomb, or to a convex multisided polygon. 7. A respiration valve 401 according to claim 1, wherein at least said flexible wall in said pneumatic pinch valve is made from silicone rubber. 8. A respiration valve 401 according to claim 1, wherein said pneumatic pinch valve is made as a hybrid comprising a flexible wall made of silicone rubber and a chamber made of a plastic. 9. A respiration valve 401 according to claim 1, wherein said respiration valve is made from silicone rubber.