Loading patent…
AssigneeNormalair-Garrett (Holdings) Limited
InventorsBrian H. Rogers, Paul A. Tucker
Estimating the term…
A gas flow controller 10 for use with a molecular sieve type oxygen enrichment of air system 5 delivering oxygen enriched air for breathing by aircrew ensures that a constant preset quantity of product gas in the form of oxygen enriched air flows from the system 5 so that it performs under varying demand conditions and varying air supply conditions to maintain desired levels of oxygen concentration in the oxygen enriched air delivered to the aircrew by means of a demand regulator 6 and a breathing mask 7. A servo-operated valve means 20 bleeds air from downstream of a venturi section 15 provided between in the inlet 13 and outlet 14 of a gas flow duct 12 in the body 11 of the controller 10. The servo-operated valve means 20 is regulated by an actuator means 29 responsive to pressure difference through the venturi section 15. An adjustment means 42 responsive to duct pressure upstream of the venturi section and either to varying cabin absolute pressure or to varying cabin differential pressure, applies a biasing force to the actuator means.
A gas flow controller for use in controlling the mass of air flowing through an aircraft molecular sieve type oxygen enrichment of air system, such flow controller having a gas flow duct connecting an inlet and an outlet by way of a venturi section, the inlet being arranged to receive product gas in the form of oxygen enriched air flowing from molecular sieve beds, and a servo-operated valve means for removing product gas from the gas flow duct downstream of the venturi section comprising a servo-operated valve regulated both by an actuator means responsive to pressure difference through the venturi section, and by adjustment means having at least one pressure responsive wall arranged to respond to the difference between duct pressure upstream of the venturi section and at least one varying external pressure conducted into the gas flow controller for applying a biasing force to the actuator means.
A breathing system for supplying oxygen-enriched air to aircrew of an aircraft, including a molecular sieve system arranged to deliver oxygen-enriched air as product gas by way of a gas flow controller and a demand regulator to a breathing mask, the gas flow controller comprising an inlet connected for receiving product gas delivered by the molecular sieve system, an outlet connected to the inlet by way of a product gas flow duct having a venturi section, servo-operated valve means for removing product gas from the product gas flow duct downstream of the venturi section, actuator means responsive to pressure difference through the venturi section for regulating a servo-operated valve of the servo-operated valve means, and adjustment means having at least one pressure responsive wall arranged to respond to the difference between duct pressure upstream of the venturi section and at least one varying external pressures for applying a biasing force to the actuator means.
Dependencies are inferred from the claim text.