×

Electronically compensated pressure dilution demand regulator

  • US 4,648,397 A
  • Filed: 10/28/1985
  • Issued: 03/10/1987
  • Est. Priority Date: 10/28/1985
  • Status: Expired due to Fees
First Claim
Patent Images

1. A pressure demand dilution regulator for regulating a fluid mixing apparatus which supplies a breathable fluid in response to changes in the physiological breathing needs of a recipient, said regulator comprising:

  • an oxygen inlet adapted to be connected to an oxygen source and an air inlet adapted to be connected to an air source;

    an oxygen flow control means connected to said oxygen inlet for adjusting oxygen flow from said oxygen source;

    an air flow control means connected to said air inlet for adjusting air flow from said air source;

    inhalation means connected to said oxygen inlet and said air inlet;

    sensor means for generating a signal representative of suction pressure in said inhalation means caused by the recipient'"'"'s breathing gas supplied through said oxygen and air flow control means;

    means for sensing altitude;

    means coupled to said altitude sensing means for generating signals corresponding to a prescribed pressure and oxygen concentration percentage based on altitude;

    means for comparing said sensed signal representative of suction pressure with said prescribed pressure signal to develop an error signal; and

    means coupled to said oxygen concentration generating means for proportionally biasing said error signal between said oxygen flow control means and said air flow control means according to said prescribed oxygen concentration percentage.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×