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COUNTERBALANCE ASSEMBLIES FOR UPWARDLY OPENING AIRCRAFT DOORS AND AIRCRAFT INCLUDING SAME
Counterbalance assemblies include a torsion bar spring for counter-balancing the weight of upwardly opening aircraft doors for ease of opening and closing. The torsion bar spring may be linked to the aircraft door through an integrated gear reduction system comprised of two pairs of spur gears and respective shafts as well as a linkage assembly. A cable reel is connected to the output shaft and the input shaft is connected to a four bar linkage system attached to the end of the torsion bar. The cable reel stores the lift cable and provides the output torque to lift the aircraft door. When the aircraft door opens or closes, the center of mass loses or gains height respectively, causing a variation of gravitational potential energy. In such a manner, the gravitational potential energy is exchanged with strain elastic energy from the counter-balance spring therefore reducing the required external source of energy whether it is from a power assisted means or manual operation.
COUNTERBALANCE ASSEMBLIES FOR UPWARDLY OPENING AIRCRAFT DOORS AND AIRCRAFT INCLUDING SAME
Counterbalance assemblies include a torsion bar spring for counter-balancing the weight of upwardly opening aircraft doors for ease of opening and closing. The torsion bar spring may be linked to the aircraft door through an integrated gear reduction system comprised of two pairs of spur gears and respective shafts as well as a linkage assembly. A cable reel is connected to the output shaft and the input shaft is connected to a four bar linkage system attached to the end of the torsion bar. The cable reel stores the lift cable and provides the output torque to lift the aircraft door. When the aircraft door opens or closes, the center of mass loses or gains height respectively, causing a variation of gravitational potential energy. In such a manner, the gravitational potential energy is exchanged with strain elastic energy from the counter-balance spring therefore reducing the required external source of energy whether it is from a power assisted means or manual operation.
COUNTERBALANCE ASSEMBLIES FOR UPWARDLY OPENING AIRCRAFT DOORS AND AIRCRAFT INCLUDING SAME
SILVA OBERDAN MARTINS (author) / TRISOTTO SAINT CLAIR (author) / LINHARES BRIAN ADMAS (author) / HASHIMOTO JORGE TOSHIO (author) / MOREIRA PAULO JUNIO SACRAMENTO HORTA (author) / LANG RICARDO PAMPLONA (author)
2018-07-12
Patent
Electronic Resource
English
IPC:
E05D
Scharniere oder andere Aufhängevorrichtungen für Türen, Fenster oder Flügel
,
HINGES OR OTHER SUSPENSION DEVICES FOR DOORS, WINDOWS, OR WINGS
/
B64C
AEROPLANES
,
Flugzeuge
/
E05F
DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION
,
Vorrichtungen zum Bewegen der Flügel in die Offen- oder Schließstellung
EMERGENCY DEVICE ACTUATION ASSEMBLIES AND AIRCRAFT INCLUDING SAME
| European Patent Office | 2023