A coupling can include a barrel that includes a communication pathway, such as an electrical contact or optical pathway. The coupling can include a nut that is configured to engage with a corresponding portion of a mating connector, such as via a threaded connection. When the coupling and the mating connector are engaged, the nut secures the coupling and the mating connector together, and respective termination elements of the coupling and the mating connector are in communication with each other. The coupling can include a torque-limiting mechanism. The torque-limiting mechanism can be configured to enable the transmission of torque up to a limit amount, and to inhibit or prevent the transmission of torque above the limit amount.

A displacement-actuated positive-drive clutch (10; 20) includes an input member (11; 21) having a positive engagement structure (11d; 21d) provided thereon and an output member (13; 23). A clutch plate (16; 25) is connected for rotation with and for axial movement relative to the output member (13; 23). The clutch plate (16; 25) has a positive engagement structure (16b; 25b) provided thereon that positively engages the positive engagement structure (11d; 21d) provided on the input member (11; 21) to engage the displacement-actuated positive-drive clutch automatically in response to the occurrence of a predetermined amount of relative rotational movement between the input member (11; 21) and the output member (13; 23).

A clutch assembly includes an output shaft extending along an axis and output teeth. A movable component is disposed adjacent to the output component. The movable component includes drive teeth and an annular engagement weight track including a groove circumscribing the axis. The movable component is movable between an engaged position, wherein the drive teeth are drivingly engaged with the output teeth, and a disengaged position, wherein the drive teeth are not engaged with the output teeth. An input component is disposed adjacent to the movable component. The input component includes engagement weight pockets. Spherical engagement weights are disposed in each engagement weight pocket. The groove has a generally uniform radial cross section across its circumference.

A method and decoupler for disengaging an output member from an engine in a back drive event with a backdrive decoupler. The backdrive decoupler includes a shaft and a retention mechanism selectively coupling the output member to the shaft. In a backdrive event, the decoupler decouples the member from a drive shaft.

A method and decoupler for disengaging an output member from an engine in a back drive event with a backdrive decoupler. The backdrive decoupler includes a shaft and a retention mechanism selectively coupling the output member to the shaft. In a backdrive event, the decoupler decouples the member from a drive shaft.

A synchronous engagement clutch (SEC) assembly is provided. The SEC assembly includes a starter ball guide and a carrier support. The starter ball guide includes opposed first and second sides and the carrier support includes opposed first and second sides. The first side of the starter ball guide defines an annular groove and the second side of the carrier support defines pockets. The starter ball guide and the carrier support are disposable with the first side of the starter ball guide facing the second side of the carrier support such that engagement balls are retainable in the pockets and the annular groove.

A transmission includes an output shaft, a first gear rotatably mounted on the output shaft, a shuttle movably axially on the output shaft, and an engagement member fixedly mounted on the output shaft. The first gear includes first dog teeth. The shuttle includes second dog teeth which engage the first dog teeth. In a drive condition, the engagement member axially moves the shuttle into engagement with the first gear, first surfaces of the first and second dog teeth engage, and, as a result, the first gear rotates in together with the output shaft. In a freewheeling condition the output shaft is stationary, an overdrive of the first gear results in engagement of second surfaces of the first and second dog teeth, and, as a result, the shuttle moves out of engagement with the first gear allowing for free rotation of the first gear about the output shaft.

A transmission includes an output shaft, a first gear rotatably mounted on the output shaft, a shuttle movably axially on the output shaft, and an engagement member fixedly mounted on the output shaft. The first gear includes first dog teeth. The shuttle includes second dog teeth which engage the first dog teeth. In a drive condition, the engagement member axially moves the shuttle into engagement with the first gear, first surfaces of the first and second dog teeth engage, and, as a result, the first gear rotates in together with the output shaft. In a freewheeling condition the output shaft is stationary, an overdrive of the first gear results in engagement of second surfaces of the first and second dog teeth, and, as a result, the shuttle moves out of engagement with the first gear allowing for free rotation of the first gear about the output shaft.

A drive shaft coupling is provided, such as a coupling used with a formula delivery appliance. The drive shaft coupling generally includes a drive gear and a driven gear, with one of the drive gear and driven gear having a biasing member to allow axial translation. The drive shaft coupling is generally configured to transfer rotation from the drive gear to the driven gear. In one aspect, the drive shaft coupling is capable of alignment and coupling of the drive gear and driven gear upon the radial sliding of the coupling from a non-engagement position to an engagement position.

The embodiments relate to devices for coupling, in particular the recoupling an output shaft with an epicyclic gearbox in a gas turbine engine, wherein an axial coupling action between the output shaft and the epicyclic gearbox is generatable through an oil pump and transmitted through an oil transfer coupling. Embodiments also relate to a method for coupling and a gas turbine engine.