×

Pneumatically-operated gas demand apparatus

  • US 6,237,594 B1
  • Filed: 09/22/1999
  • Issued: 05/29/2001
  • Est. Priority Date: 09/22/1999
  • Status: Expired due to Term
First Claim
Patent Images

1. 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;

    said supply valve being in communication with the at least one pressurized gas source, said sensing valve and the recipient, said supply valve being operable to move between a flow-supplying position and a flow-blocking position responsive to movement of said sensing valve;

    said sensing valve being in communication with the at least one pressurized gas source, said supply valve and the recipient, said sensing valve being operable to move between a flow-stopping position whereby said supply valve assumes said flow-blocking position when the recipient exhales thereby preventing delivery of the gas to the recipient and a flow-causing position whereby said supply valve assumes said flow-supplying position when the recipient inhales thereby delivering the gas from the pressurized gas source to the recipient;

    a regulator mechanism including at least one regulator disposed between and in interruptible fluid communication the pressurized gas source and said supply valve; and

    a plurality of bolus chambers disposed between and in fluid communication with said at least one regulator and said supply valve, said plurality of bolus chambers comprising a bolus chamber adapted to accommodate a portion of pressurized gas flow delivered from said at least one regulator, and at least one additional bolus chamber adapted to accommodate at least one additional portion of pressurized gas flow delivered from said at least one regulator.

View all claims
  • 12 Assignments
Timeline View
Assignment View
    ×
    ×