Patent ID: 6378520
Filing Date: 2002-04-30
Classification: A61M

Abstract:
A pneumatically-operated gas demand apparatus coupled in interruptible fluid communication between a recipient and at least one source of a pressurized gas and adapted for controlling delivery of the pressurized gas to the recipient as the recipient inhales and exhales, comprising:a supply valve and a sensing valve cooperable to intermittently deliver pressurized gas to the recipient responsive to the recipient's inhalation and exhalation; a regulator mechanism including at least one regulator disposed between and in interruptible fluid communication with the at least one source of a pressurized gas and said supply valve; and a control device, said control device including flow control means for controlling flow of pressurized gas from the at least one source of a pressurized gas to said supply valve and flow of pressurized gas from the at least one source of a pressurized gas to said regulator mechanism, said control device further comprising pressure control means for controlling the pressure of pressurized gas discharged by said regulator mechanism.