Abstract: Various improvements to axle assemblies are disclosed herein that are especially adapted for highly robust and compact configurations for use in front (i.e., steering) axle configurations.

Abstract: The present disclosure relates generally to an aircraft with counter-rotating pusher props powered by a gas turbine engine having a power turbine disposed substantially perpendicular to the compressor, combustor and turbine gas generator power core axis, as well as to the aircraft longitudinal axis.

Abstract: A retrofittable control system for controlling an engine and a clutch of a frost fan may include a data processing system, a thermostat, a human machine interface, a throttle control module, and/or a clutch control module. The control system may be configured to automatically start the fan when the thermostat detects a temperature below a user defined turn-on temperature, and to automatically shut down and park the fan when the thermostat detects a temperature above a user defined turn-off temperature. In some examples, starting up the fan may include running a clutch engagement sequence that engages the clutch at different speeds for different durations.

Abstract: The described reduction gearbox of a gas turbine engine includes a first gear reduction stage having an input gear adapted to be driven by a turbine output shaft. The input gear transfers power received from the turbine output shaft laterally away from the input gear to an input speed gear. Each input speed gear engages an output speed gear to define a main speed reduction gear set, and the main speed reduction gear sets are laterally spaced apart from one another to define a gap. The gearbox has a second gear reduction stage driven by the output speed gears, the second stage adapted to drive an engine output shaft.

Abstract: The invention concerns a gear motor (1), in particular for driving vehicle equipment, comprising a rotor provided with a rotor shaft (6), a reduction gearbox housing (14) containing a cog wheel engaged in an endless screw of the shaft and capable of driving an output member (12). The invention is characterised in that it comprises means (12) for eliminating, under predetermined axial compression (F), all axial play between one end (6a) of the rotor shaft and the housing wall (13). Said means can comprise a plug (15) housed in the housing (14) end (13) and a piston (18), inserted between the plug (15) and the shaft (6) end (6a); the plug (15) exerts on the piston (18) and the shaft (6) the axial thrust (7) which is adjusted when being mounted, and is axially locked in the corresponding position by melting the housing (14) plastic material in the grooves or recesses (19) of the piston (18) surface, then in solidifying said plastic material.

Abstract: A reducing motor including a rotor with an armature shaft, a reducer housing (2) containing a gear wheel (3) engaging a worm on the shaft, and a shock absorber (5) housed in the gear wheel and rotationally integral therewith. The unitary shock absorber has circumferential notches (8) engageable both by radial flanges 87) on the gear wheel and by elements (10) for driving an output member (11), and chamfers (90) are provided on the edges of the notches to ensure gradual torque-dependent angular deflection of the shock absorber and make it easier to mount the same automatically on the hub of the gear wheel.

Abstract: An apparatus (10) for use in turning steerable wheels of a vehicle having an engine includes a first gear (16) which is rotatable about a first axis (24) and a second gear (14) having teeth (20) in meshing engagement with teeth (18) on the first gear (16). The first gear (16) is movable along the first axis (24) to reduce clearance between the teeth (18) and (20) of the first and second gears (16) and (14). Adjustment of the first gear (16) along the first axis (24) is prevented during operation of the engine of the vehicle. Adjustment of the first gear (16) along the first axis (24) is enabled when the engine of the vehicle is in a non-operational condition.

Abstract: An apparatus for use in turning steerable wheels of a vehicle includes a first gear (16) and a second gear (14). The first gear (16) is movable along an axis (24) to reduce clearance between meshing teeth (18 and 20) on the gears (14 and 16). A lash adjustment assembly (46) is operable to adjust the clearance between the teeth (18 and 20) of the gears (14 and 16). The lash adjustment assembly (46) includes a threaded member (60). An external thread convolution (66) on a shank portion (64) of the threaded member (60) engages an internal thread convolution (68) on the first gear (16). A spring (72) has a plurality of turns (78) which are coiled around the shank portion (64) of the threaded member (60). One end portion of the spring (72) is connected to the shank portion (64) of the externally threaded force member (60).

Abstract: An auto correction device for wearing end play in worm gear set has a correction worm gear, two linking gears and auxiliary linking gears to help power transmission in a smooth manner. The correction worm gear further includes a threaded thrust block, an auxiliary linking gear, a thrust plate, an expansion spring and a base plate. The thrust of the expansion spring against the thrust plate enables the displacement of the auxiliary linking gear and threaded thrust block to thrust against the correction worm gear to impose a force upon transmission gear to enable the transmission gear to lean tightly against the worm gear. Thus, wearing end play between the worm gear and the correction worm gear is eliminated.

Abstract: A position-feedback-control servomechanism for shifting the transmission of a vehicle has a control algorithm that adjusts the loop gains in a proportional-integral-differential controller to compensate for manufacturing variations in the apparatus as well as for temperature changes and wear. The resulting control system moves the shifting servomechanism into the selected positions accurately and as quickly as possible without permitting excessive overshooting or resonance.

Abstract: An improvement to an electrically driven power steering apparatus which utilizes an electric motor is disclosed. A bevel gear of a greater diameter is mounted on a steering shaft so as to be axially displaceable thereon, and an urging mechanism is connected between the bevel gear and the steering shaft. The urging mechanism renders the bevel gear to be incapable of rotation relative to the steering shaft, and also urges the teeth thereof toward the teeth of a bevel gear of a reduced diameter which is coupled to the electric motor. This prevents a backlash from occurring between the both bevel gears, thus preventing the occurrence of sounds of percussion as the both gears abut against each other.

Abstract: A gear system includes a housing and an intermediate ring gear movably carried on a support hub coupled to an output shaft. The ring gear is driven by an input pinion gear through a running tooth system and drives the support hub through a coupling tooth system. Misalignment of the gearings due to housing, shaft or support deflections under load are compensated by providing an arcuate axial tooth profile and radial clearance in the coupling tooth system. The coupling tooth system includes lubricant confined between a pair of sealing discs. In an alternate embodiment, the ring gear is carried on spherically configured rings of the support and the ring gear includes mating spherically configured rings with suitable clearance between the spherical surfaces. Engagement between the mating spherical surfaces generates the radial force required for adjustment of the ring gear while maintaining radial tooth clearance within the coupling tooth system.

Abstract: A spiral bevel pinion and its meshing bevel gear are carried in a typical housing. The problem solved is accommodation of the axial thrust imparted to the pinion shaft during functioning of the drive train, the solution being in the form of biasing means backing up the thrust bearing ahead of the pinion and enabling the use of lighter-weight, less expensive bearings. A further feature is the use of a further bearing in the form of a needle bearing having radial needles between the inner race ring of the main thrust bearing and the biasing means.

Abstract: The invention provides a simple, yet highly accurate device for synchronizing the speeds of two power-driven machines having separate, variable speed power-drives. A pair of shafts are respectively connected to the two machines and mounted in opposed concentric relationship for rotation in opposite directions at rates respectively proportional to the speed of rotation of the two machines. A differential unit is connected between the two shafts, such unit having equal size input and output sun gears respectively connected to the shafts. The planetary output of the differential unit is connected to a speed control element for at least one of the motors respectively driving the machines to vary the speed of such machine to bring it into rotational synchronization with the other machine.

Abstract: A drive system for a multiple gas turbine engine system includes power output shafts from first and second gas turbine engines, each power shaft connected to drive a load and each engine including a load sharing cross-over shaft for power transfer from one of the engines to the other engine;a right angle gear box assembly connects each of the power output shafts to the cross-over shaft and each of the right angle gear box assemblies includes first and second load sharing gear paths including tooth geometry in an input bevel gear configured to produce a thrust reversal so that for normal direction torque transfer the input bevel gear thrust is in a direction to load mesh points in both gear paths and for a reversal of torque direction from input to output gears the input gear thrust is reversed so that the input gear will be directed into a tighter mesh to take out normal backlash in the system so that reverse meshed torque paths will be maintained in each of the first and second gear paths to maintain a shari