GAS FLOW CONTROL DEVICE Russian patent published in 2014 - IPC A61B5/97 

FIELD: medicine.

SUBSTANCE: group of inventions refers to medical equipment. A gas flow control device comprises a body assembly, an inlet pipe assembly, a displacement device, a middle chamber and a constant pressure chamber formed in the body assembly between a flange of the inlet pipe assembly and a distal plate. A lower membrane is hermetically integrated between the inlet pipe assembly adjoining a proximal inlet end and an inner surface of the body. A width of the lower membrane allows it to be overlapped circumferentially. The apparatus is configured to be found in an open position, wherein the incoming air flow in the inlet hole is directed to the constant pressure chamber through a cavity, and in a closed position, wherein the cavity is fluid-compacted between the inlet hole and the constant pressure chamber to provide the constant air flow rate from an outlet hole regardless of the varying rate of the incoming air flow on the inlet hole. There are disclosed a method for the air flow control and versions of a valve assembly used in the gas flow control device.

EFFECT: providing the constant air flow rate from the outlet hole regardless of the varying rate of the incoming air flow.

21 cl, 6 dwg