AUTOMATIC VALVE FOR VENTILATION OF STOMYBAGS

摘要

Valve for automatic ventilation of stomybags and for control of gasflow through a deodorizing filter. In the main figure, which is number 2, the pressure control valve is built in a flat capsule with a top (1), a bottom (3) and a tightening film (2). Between the tightening film and the top of the valve is an elastic pressure plate (4) with a pressure surface (5), which holds the tightening film against the bottom of the valve, when the valve is closed. The valve is mainly made of polymeric materials. The valve is flexible and flat and can be placed both on plane and curved surfaces of bags or containers. The valve opens and closes defined interval for the existing pressure in the stomybag (11). Flatus will passes through the opening (8) in the bottom and opening (10) in the top of the valve, as well as it passes the small opening (9) in the tightening film. If the pressure plate or any part of the valve is made of soft, viscous elastic material of porosity, then valve can be opened manually as well. The valve will in this case remain open for a short period of time and close continuously. For reasons of protection the valve has a membrane of porosity mainly produced of polytetrafluorethylen based on a material also of porosity and heatsealable. The pressure plate (4) can be impregnated with activated carbon. The valve can be coupled to gas filter of combined with a gas filter.