The Boeing Company

Mark William Lesyna

Kamiar J Karimi

Mark Steven Good

Andrew Johnson

George Michael Roe

Mark Eugene Liffring

Matthew August Lassen

Michael E Renzelmann

Mark John Gardner

Thomas R Hasenoehrl

Thomas F Currier

David S Krug

Christopher Mark Severns

Andrew John Bayliss

Nicholas Seth Tyler

Brian Curtis Hill

Thomas Michael Wilson

Edmond C Chin

Patrick Joseph McCormick

Patrick M Fahey

Paul R Smith

Jim Gardiner

Barry D Hance

Matthew D Uhlman

Christopher P Beamis

Ali Abdelmagid

Ellen A Pifer

Robert J Hawk

Herbert Guttler

Christopher M Sevems

Thomas Raymond Hasenoehrl

Thomas M Wilson

Thomas R Hasenoehhrl

Mark J Gardner

A hydraulic system (e.g., of an aircraft or other vehicle) includes a pump, a pressure line coupled to the pump and configured to distribute pressurized hydraulic fluid, and a return line configured to return hydraulic fluid to a reservoir. The hydraulic system also includes an auxiliary leakage valve coupled to the pressure line, to the return line, and to an actuator. The auxiliary leakage valve is configured to receive a control signal and, based on the control signal, selectively open a restricted fluid path. The restricted fluid path couples the pressure line to the return line to allow a restricted amount of the hydraulic fluid to flow from the pressure line to the return line.

Hydraulic fluid warming system and method

An aircraft may include at least one secondary power system requiring secondary power, at least two main engines, and at least three non-propulsive utility power (NPUP) generation systems. The NPUP generation systems may each be configured to provide full-time secondary power during operation of the aircraft. The NPUP generation systems may be configured to provide at least a portion of the secondary power required by the secondary power system.

Non-propulsive utility power (NPUP) generation system for providing secondary power in an aircraft

A system and method for a number of backup systems in an aircraft. The apparatus comprises a movement system; a latch system; a lock system; and at least one of a backup valve, a backup actuator, or a backup power source connected to at least one of the movement system, the latch system, or the lock system. The movement system has a first number of actuators and is connected to a hydraulic power source. The latch system has a second number of actuators and is connected to the hydraulic power source. The lock system has a third number of actuators and is connected to the hydraulic power source.

Backup system

A method includes receiving pump cycle location data associated with a fluid power system. The fluid power system includes a plurality of pumps (including at least a first pump, a second pump, and a third pump). Based on the pump cycle location data having a first value, the method includes activating the first pump as a primary pump. Based on the pump cycle having a second value, the method includes activating the second pump as the primary pump. The method also includes activating the third pump as a secondary pump when the fluid power system is in a multiple-pump operating mode.

Dynamic activation of pumps of a fluid power system

A hydraulic line is secured to a stiff conduit extending between aircraft frame members.

Securing hydraulic lines in an aircraft

An automatic engine driven pump (EDP) depressurization system for an aircraft is disclosed. The aircraft includes at least two EDPs driven by a main engine for converting mechanical power provided by the main engine into hydraulic power for distribution by a hydraulic system. The EDP depressurization system includes a depressurization device corresponding to each of the at least two EDPs and a control module. The depressurization devices are each energized to depressurize a respective EDP. The control module is in signal communication with each of the depressurization devices. The control module includes control logic for automatically generating a depressurization signal that energizes one of the depressurization devices based on a plurality of operational conditions of the aircraft.

Engine driven pump (EDP) automatic depressurization system

Non-propulsive utility power (NPUP) generation system for providing full-time secondary power during operation of an aircraft

Growing community of inventors

Everett, WA, United States of America

Mark William Lesyna