| Patent application number | Description | Published |
|---|
| 20100173575 | MULTIPLE OUTFLOW VALVE CABIN PRESSURE CONTROL SYSTEM - A multiple outflow valve control system for an aircraft is provided having a plurality of outflow valves that may be controlled independently via an all electrical control system. The outflow valves may be located in various locations in an aircraft. The control system may have a control loop controlling the outflow valve motors via open-loop PWM commands and may not have a motor speed feedback in the control loop. The cabin pressure control system may have manual and auto controls controlling separate motors on each outflow valve. Auto motor control may be performed via software biasing command logic included in the control laws in the control system. Air flow may be biased through selected outflow valves and the degree of biasing may be automatically or manually set. | 07-08-2010 |
| 20100190428 | THRUST RECOVERY, OR OTHER VALVE, CONTAINING TWO INDEPENDENTLY ACTUATED DOORS AND CONTROL SYSTEM - A thrust recovery valve has two flaps, with each flap controlled independently via its own rotary actuator. Embodiments of the present invention also provide a cabin pressure control system that includes one or two thrust recovery valves and the controls architecture to efficiently operate the valves. On each thrust recovery valve, only one door can be operated during flight, making less effective area change per unit time (relative to the operating both doors at the same time), allowing higher resolution of valve control. Further, the valve doors can be made such that the primary door that is operated in flight is smaller than the other door (mostly only operated on the ground). Because the doors of the thrust recovery valve can be operated independently, the forward door of each valve can be rotated such that the door creates a ram air “scoop” to ingress air to prevent negative pressure from building up beyond a specified limit. | 07-29-2010 |
| 20100240291 | OUTFLOW VALVE POSITION INDICATION - An aircraft cabin pressure control system outflow valve includes a frame, a valve element, and a position sensor. The frame is configured to be mounted on an aircraft exterior skin. The valve element is rotationally coupled to the frame, and is coupled to receive an actuation drive force. The valve element is responsive to the actuation drive force to rotate to a position between a closed position and a plurality of open positions. The position sensor is coupled to the frame and is configured to directly sense rotation of the valve element and supply a position signal representative of valve element position. | 09-23-2010 |
| 20110057141 | POPPET VALVE FOR CABIN PRESSURE CONTROL SYSTEMS - A valve for use in a cabin pressure control system includes a valve body and a poppet. The valve body includes an inlet, an outlet, and a fluid flow passage therebetween. The poppet is disposed in the valve body. The poppet is moveable between at least a closed position, in which the poppet at least substantially restricts fluid from flowing through the fluid flow passage, and an open position, in which fluid is allowed to flow through the fluid flow passage. The valve body, the poppet, or both, have a fluorocarbon coating. | 03-10-2011 |
| 20110165828 | LIGHTWEIGHT CABIN PRESSURE THRUST RECOVERY OUTFLOW VALVE - An aircraft cabin pressure control system outflow thrust recovery valve includes a frame, a valve element, and actuation hardware. The frame, valve element, and at least a portion of the actuation hardware are made of composite material. The actuation hardware is disposed external to the frame. | 07-07-2011 |
| 20120064813 | CABIN PRESSURE THRUST RECOVERY OUTFLOW VALVE WITH SINGLE DOOR - A single valve door thrust recovery outflow valve is provided that does not rely on a relatively large and expensive actuator to move it, and does not create unwanted drag during aircraft cruise operations. The valve includes a valve frame, a valve door, and an aerodynamic flap. The valve door is rotationally coupled to the valve frame, is adapted to receive a drive torque, and is configured, upon receipt of the drive torque, to rotate between a closed position, a full-open position, and a plurality of partial-open positions between the closed position and the full-open position. The aerodynamic flap is coupled to the valve door. When the valve door is in the closed position and in numerous partial-open positions, the aerodynamic flap makes the thrust recovery outflow valve aerodynamically clean. | 03-15-2012 |
| 20130059516 | CABIN PRESSURE CONTROL SYSTEM THRUST RECOVERY OUTFLOW VALVE AND METHOD THAT ENABLE RAM AIR RECOVERY - A thrust recovery outflow valve and method for controlling the transfer of air between a cabin in an aircraft and atmosphere outside of the aircraft are provided. An outflow valve is mounted on the aircraft that includes a valve frame, a first valve door, and a second valve door. The first valve door is rotated to a first predetermined open position while the second valve door is in the second door closed position to thereby open first and second flow passages that place the aircraft cabin in fluid communication with the atmosphere. When the first valve door is at a first predetermined open position, a flap is rotated, relative to the first valve door, to at least partially cover the second flow passage and thereby at least inhibit flow through the second flow passage. | 03-07-2013 |
| 20130059517 | THRUST RECOVERY OUTFLOW VALVE WITH A SINGLE BI-FOLD DOOR AND METHOD OF CONTROLLING AIRCRAFT CABIN PRESSURE - A bi-fold valve door and method for controlling aircraft cabin pressure are provided. The bi-fold valve door includes an aft door section and a forward door section, and only the forward door section is selectively rotated about one rotational axis to a position between a closed position and a full-open position, while the aft door section is maintained in its closed position. The forward door section is selectively rotated about the rotational axis to a full-open position to engage the aft door section, while the aft door section is maintained in its closed position. When the forward door section is in the full-open position, the aft door section and the forward door section are simultaneously rotated about another rotational axis. | 03-07-2013 |
| 20130233408 | CABIN PRESSURE CONTROL SYSTEM WITH MULTIPLE OUTFLOW VALVES AND METHOD OF CALIBRATING THE OUTFLOW VALVE POSITION FEEDBACK DURING FLIGHT - A method of calibrating an outflow valve on an aircraft may include determining if the aircraft has reached a predetermined cruise condition. The outflow valve may be moved until a closed position is reached, if the aircraft has reached the predetermined cruise condition. An actual position feedback value of the outflow valve may be determined while the aircraft is in the predetermined cruise condition. An offset calibration factor may be determined from the actual position feedback value of the outflow valve relative to a theoretical value. | 09-12-2013 |
| 20140134936 | LIGHTWEIGHT CABIN PRESSURE THRUST RECOVERY OUTFLOW VALVE - An aircraft cabin pressure control system outflow thrust recovery valve includes a frame, a valve element, and actuation hardware. The frame, valve element, and at least a portion of the actuation hardware are made of composite material. The actuation hardware is disposed external to the frame. | 05-15-2014 |
