CPC A61B 5/0235 (2013.01) [A61B 5/0225 (2013.01); A61B 5/02233 (2013.01); F04B 45/047 (2013.01); F16K 7/00 (2013.01); F16K 7/17 (2013.01)] | 20 Claims |
1. A valve comprising:
a first plate having a first vent hole;
a second plate having a second vent hole;
a diaphragm between the first plate and the second plate;
a channel forming plate having an exhaust hole and comprising an intermediate plate and an exhaust channel forming plate, the intermediate plate, the exhaust channel forming plate, and the second plate being laminated such that the exhaust channel forming plate is between the intermediate plate and the second plate;
a first channel connecting the first vent hole and the second vent hole;
a second channel connecting the second vent hole and the exhaust hole; and
a valve member forming a first valve chamber within the first channel between the first plate and the channel forming plate, and forming a second valve chamber within the second channel between the second plate and the channel forming plate, the valve member connecting the first channel and interrupting the second channel, or interrupting the first channel and connecting the second channel, based on a pressure of the first valve chamber and a pressure of the second valve chamber,
wherein the second channel comprises a laterally extending exhaust channel portion connecting the second valve chamber to the exhaust hole,
wherein a perimeter of the diaphragm is smaller than a perimeter of the first plate and is smaller than a perimeter of the second plate, and
wherein a whole of the diaphragm is within the first valve chamber and the second valve chamber.
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