Abstract: A splined coupling assembly includes: a transfer gear having a first end, a second end opposite the first end, and a plurality of splines at the first end. The splined coupling assembly also includes a transfer housing having a first side, a second side opposite the first side, and a tubular portion located at the second side. The tubular portion includes a plurality of splines. The plurality of splines of the transfer housing are configured to mesh with the plurality of splines of the transfer gear. The splined coupling assembly further includes a shear ring located in a shear ring groove in the tubular portion- and a retainer configured to retain the shear ring within the shear ring grove.

Abstract: A splined coupling assembly is provided. The splined coupling assembly comprising: a transfer gear having a first end, a second end opposite the first end, and a plurality of splines at the first end; and a transfer housing having a first side, a second side opposite the first side, and a tubular portion located at the second side, the tubular portion comprising: a plurality of splines, wherein the plurality of splines of the transfer housing are configured to mesh with the plurality of splines of the transfer gear; a shear ring located in a shear ring groove in the tubular portion; and a retainer configured to retain the shear ring within the shear ring grove.

Abstract: The exit area of a nozzle assembly is varied by translating a ring assembly located at a rear of the engine nacelle. The ring may be axially translatable along the axis of the engine. As the ring translates, the trailing edge of the ring defines a variable nozzle exit area. Translation of the ring creates an upstream exit at a leading edge of the ring assembly. The upstream exit can be used to bleed or otherwise spill flow excess from the engine bypass duct. As the engine operates in various flight conditions, the ring can be translated to obtain lower fan pressure ratios and thereby increase the efficiency of the engine. Fairings partially enclose actuator components for reduced drag.

Abstract: An actuator comprises a rotatable nut arranged to be driven for rotation by a motor, an axially translatable shaft cooperable with the nut and arranged such that rotation of the nut drives the shaft for axial movement, and a steering rack coupled to the shaft by a coupling arrangement so as to be driven for axial movement by the shaft, wherein the coupling accommodates limited relative lateral movement between the shaft and the steering rack.

Abstract: An actuator comprises a shaft 12 arranged to be driven for rotation by an electrically powered motor 18, a sleeve 22 encircling at least part of the shaft 12 and carrying a toothed rack formation 26, and a low friction screw coupling 36 between the shaft 12 and the sleeve 22 and arranged such that rotation of the shaft 12 drives the sleeve 22 for axial movement, wherein the low friction screw coupling 36 is adjacent and aligned with the rack formation 26.

Abstract: The exit area of a nozzle assembly is varied by translating a ring assembly located at a rear of the engine nacelle. The ring may be axially translatable along the axis of the engine. As the ring translates, the trailing edge of the ring defines a variable nozzle exit area. Translation of the ring creates an upstream exit at a leading edge of the ring assembly. The upstream exit can be used to bleed or otherwise spill flow excess from the engine bypass duct. As the engine operates in various flight conditions, the ring can be translated to obtain lower fan pressure ratios and thereby increase the efficiency of the engine. Fairings partially enclose actuator components for reduced drag.

Abstract: An actuator having a piston member slideable within a cylinder, the piston member defining with the cylinder a first chamber and a second chamber, the effective cross-sectional of the piston member exposed to the fluid pressure within the first chamber being greater than that exposed to the fluid pressure within the second chamber. The actuator further has first and second ports through which fluid can be supplied to the first and second chambers, respectively, and a third port located intermediate the first and second ports. The piston member and the third port are cooperable to throttle the rate at which fluid is able to escape from the first and second chambers through the third port, in use.

Abstract: An actuator having a body defining an internal cavity and a gland disposed within the cavity, the gland being secured against movement relative to the actuator body in a direction along the internal cavity by a securing element located in an opening of which respective parts are defined by the actuator body and the gland, and which allows insertion of the securing element into the opening along a substantially linear path.

Abstract: A lock has a shaft coupled to a flexible shaft which synchronizes hydraulic actuators of a translating cowl thrust reverser. The shaft is provided with a rotary brake comprising axially movable rotating and fixed discs urged together by a spring. The rotating discs are rotationally fixed to an armature of a solenoid which, when actuated, releases the rotary brake to allow the shaft to rotate and the thrust reverser to be deployed or stowed.

Abstract: A shaft is supported in a housing by single row, deep-groove, radial ball bearings having diametral clearances which will permit axial displacement between their inner and outer races, abutment faces which are located with respect to the shaft and housing respectively engage the inner and outer races respectively of the bearings so as to take up play which results from the diametral clearances, abutment elements which engage the respective inner races can coact with the housing as a result of increase in the aforesaid axial displacements, to provide a braking effect between the shaft and the housing.