Patent ID: 9033683
Filing Date: 2015-05-19
Classification: A61B,F04B,F16K,G05D,Y10T

Abstract:
1. A valve comprising: a valve housing; and a diaphragm that divides an inside of the valve housing and defines a first region and a second region in the valve housing; wherein the valve housing includes: the diaphragm includes a first face that communicates with the first region and a second face that communicates with the third ventilation hole; and the diaphragm is fixed to the valve housing so that, in a case in which a pressure of the first region is higher than a pressure of the second region, the diaphragm makes the first ventilation hole and the second ventilation hole communicate with each other and blocks communication between the third ventilation hole and the fourth ventilation hole; and, in a case in which the pressure of the first region is lower than the pressure of the second region, the diaphragm makes the third ventilation hole and the fourth ventilation hole communicate with each other and blocks the communication between the first ventilation hole and the second ventilation hole.