Pressure modifying system

Details Pressure modifying system Pressure modifying system

G - Physics

05

D

137/39.1

G05D 16/00 (2006.01) A61M 16/00 (2006.01)

Patent

CA 1237628

ABSTRACT A pressure modifying valve for anaesthetic gas scavenging systems for connection between a high vacuum source such as a hospital building service and the outlet from a patient or anaesthetic machine. The valve (100) comprises a housing (102, 104, 106) divided by a partition (108) into two chambers (110,112) having inlet (114) and outlet (116) ports respectively. The partition (108) has a flow restricting orifice (118) controlled by a valve member (136) which is supported on a diaphragm (138) to be self adjusting in response to pressure in the chamber (112). On the patient side, the pressure in chamber (110) is controlled by pressure relief valves (120) which are similar and interchangeable. The valve is made inexpensively of plastics and is disposable before the plastics deteriorates or undesirable matter accumulates and affects the functioning of the valve.

474126

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