Abstract: A tractor transmission wherein an engine output is transmitted through a clutch mechanism to a primary change speed mechanism, and a clutch housing and a first transmission case are removably connected to each other. The first transmission case includes a space in a forward portion thereof to accommodate a high speed and low speed switching mechanism and a forward and backward switching mechanism, interchangeable with each other, to be attached to a rear wall of the clutch housing.

Abstract: A vehicle drive plant comprises at least two prime movers mounted with their shafts aligned at an interposed base block enclosing a gear train communicating the prime mover shafts with a common output shaft. The gear train may include bevel gears at the individual prime mover inputs, being coordinated by at least one intermediate bevel pinion. A spur gear communicating with a mating gear at the output shaft is then mounted at one of the bevel gears. With a four prime mover plant there may be spur gears at the prime mover inputs, the output shaft having an aligned stub shaft extension. The output shaft, as well as the stub shaft, carries a gear wheel having a cylindrical gear rim for cooperation with prime movers located to the same side of the plane of the division as the output shaft, or stub shaft, respectively. Each of last mentioned gear wheels is further united with a bevel gear and the two bevel gears are coordinated by means of at least one interposed bevel pinion.

Abstract: A harmonic drive apparatus includes a circular spline having a number of internal teeth, a radially flexible cylindrical flexspline having outer spline teeth engageable with the internal teeth of the circular spline, and a wave generator disposed within the flexspline in engagement therewith. The circular spline, the flexspline, and the wave generator are rotatable around a rotational axis. The number of the external spline teeth of the flexspline is less than the number of the internal spline teeth of the circular spline. The wave generator has a cam section which generates a circumferential wave of radial deflection of the flexspline for causing the external spline teeth thereof to locally engage with the internal spline teeth of the circular spline. The cam section has elasticity in its radial direction sufficient for biasing the flexspline against the circular spline to absorb any play between the flexspline and the circular spline.

Abstract: A speed change device for use in driving auxiliary machinery, comprising an auxiliary machinery driving pulley as an output member, an input member fixed to a driving shaft of an engine, a planetary gear transmission connecting changeably in speed between the auxiliary machinery driving pulley and the input member, and a hydraulic control unit for controlling the planetary gear transmission. The planetary gear transmission comprises a planetary gear set, a one-way clutch and a clutch equipped with a hydraulic servo. The hydraulic control unit has a centrifugal type governor valve which switches between feed and release a feed oil pressure to the hydraulic servo according to an increase or decrease in the number of revolutions of the driving shaft.

Abstract: According to the method, a new ratio change allowable range is obtained by learning and stored in a RAM and a ratio change is carried out within this ratio change allowable range.

Abstract: A harmonic gear apparatus includes a tubular circular spline having a multiplicity of teeth on an inner periphery thereof, and a flexible spline disposed in the circular spline and having a multiplicity of teeth on an outer periphery thereof, the number of which is smaller than that of the circular spline. A flexion generating member rotatably mounted on a rotary shaft is rotatably disposed in the flexible spline. A generally annular flexible supporting member supports one end of the flexible spline in such a manner that the flexible spline is able to flex in a radial direction but has a significant rigidity in the circumferential direction. When the spline is flexed while the flexion generation member rotates in the flexible spline, some of its teeth engage with some of the teeth of the circular spline thereby rotating the circular spline.

Abstract: A transmission system which provides a tracked vehicle with a maximum rate of turn that decreases as higher forward gear-ratios are selected and, consequently, high low-speed manoeuvrability combined with relatively low, and therefore safe, maximum rates of turn at high vehicle speeds. This is achieved by means of a modifying differential arranged to rotate a steering input member of a steering differential at a rate equal to a multiple of the rotational speed of a power input member less a multiple of the rotational speed of the output member of a gear unit.

Abstract: The present invention provides a high efficiency automatic transmission for a vehicle in which the input speed to output speed gearing ratio is infinitely variable. The transmission of the present invention comprises a torque converter assembly having a first impeller drivingly connected to an input shaft. A second stage impeller is operatively coupled to a sun gear and receives the fluid from the first stage impeller. A turbine receives the fluid from the second stage impeller and this turbine, in turn, is drivingly connected to a ring gear. A reaction member operatively coupled with a one-way brake is disposed between the outlet end of the turbine vanes and the inlet end of the first stage vanes. At least one pair, and preferably three pair, of intermeshed pinions are disposed between the sun and ring gears so that one pinion also meshes with the sun gear while the other pinion meshes with the ring gear.

Abstract: A hydraulic control system is provided wherein a predetermined delay is provided by controlling the flow of fluid from or to frictional element which contributes to shifting into a neutral state within the transmission. With this delay, the engine can sustain rotational speed necessary for restarting upon resumption of fuel supply even after the manual valve is shifted to the neutral state during running condition of an automotive vehicle where the fuel supply to the engine is interrupted.

Abstract: A monoaxial coarse-fine adjusting apparatus for optical instruments has a pair of friction wheels whose peripheries are in engagement with the fine adjusting shaft. The axles to which the friction wheels are mounted are received in slots formed in the coarse shaft. The coarse adjusting knob has a surface which the friction wheel axles bear against. A pair of springs are provided which accommodate for torsion and backlash. Rotation of the coarse knob directly rotates the coarse shaft. Rotation of the fine knob rotates the friction wheels in a planetary fashion. The friction wheel axles which are received in the slots in the coarse shaft, drive the coarse shaft an amount which is proportional to the rotation of the fine knob.

Abstract: A planetary gear unit including a first planetary gear unit having an arm member supporting a pinion shaft, the pinion shaft supporting a planet pinion. The arm member includes an extending portion which extended to a point adjacent a sun gear engaged with the planet pinion. A second planetary gear unit is positioned adjacent the planet pinion of said first planetary gear unit and a thrust washer is disposed between the arm member and the second planetary gear unit. A radiating conduit is formed on the contacting surface of the thrust washer or the arm member for supplying lubricating oil to an inner surface of the planet pinion from a point adjacent the sun gear.

Abstract: A pneumatic throttle valve actuator for an automatic power transmission mechanism for use with a supercharged or turbocharged internal combustion engine wherein the relationship between manifold pressure and actuator force is changed when the engine manifold pressure changes from a positive pressure to a negative pressure or vice-versa. A correct shift point signal and a correct pressure regulator output thus are maintained regardless of whether the turbocharger or supercharger is active or inactive.

Abstract: Apparatus enabling a vehicle operator to remotely control the positioning of an object, such as a rear view mirror, pivotally mounted on the exterior of the vehicle. The apparatus includes a support member for the object to be positioned, a base member attached to the vehicle exterior and a ball and socket joint connecting the support member to the base member. There are a pair of linkages, each including a helical spring extending between the base member and the support member. Each linkage is actuable to pivot the support member about a respective one of two mutually transverse pivotal axes. Each linkage is driven by a reversible motor operated by a four position switch inside the vehicle.

Abstract: A speed changer for a vehicle such as a track shovel is proposed with which the vehicle speed can be easily changed from one speed to another while operating a shovelling control lever. A changeover switch is mounted on the grip of the shovelling control lever.

Abstract: A creep-inhibiting device for use in an automotive vehicle equipped with an engine and a transmission mechanism coupled in series to a fluid coupling and having a frictionally engaging element. The device includes engine load sensor means for producing a signal fluid having a pressure representative of engine load, control means interposed between the frictionally engaging element and an operating fluid source, and a fluid line for delivering the signal fluid from the engine load sensor means to the control means. The control means is adapted to control the power transmission capacity of the frictionally engaging element within a range from substantially zero to a predetermined value in dependence on the signal fluid pressure supplied thereto, to inhibit creeping of the vehicle when the engine is in a no-load state.

Abstract: A reduction gear equipped with a wave generator nearly elliptical in shape, two circular splines with differing numbers of internal teeth, a flex spline which partially meshes with the internal teeth of each of the circular splines and which is deformable in the radial direction and a bearing deformable in the radial direction, which, placed between the wave generator and the flex spline, renders both members relatively slidable, with notches which permit partial deformation of the bearing (6) or the flex spline provided in the wave generator or circular splines at positions corresponding to the balls of the aforementioned bearing, whereby backlash is eliminated and its positive operation is assured.

Abstract: A clutch piston slidably mounted for motion in the axial direction on the turbine shaft or the turbine runner of a torque converter comprising a pump, an impeller, a turbine runner and a stator. A direct coupling clutch is positioned between the clutch piston and the housing of a torque converter. Pressurized oil is supplied for releasing the clutch within an oil chamber between one side of the clutch piston and the housing. A converter pressure is continuously applied to the oil chamber and to the other side of the clutch piston, which is the operating chamber of the torque converter. Thereby, the direct coupling clutch is continuously released. When the automatic transmission is in a selected high speed position, a line pressure higher than the converter pressure, is applied to the operating chamber causing the direct coupling clutch to engage. Converter pressure is applied continuously to the operating chamber of the torque converter through one port of a check valve.

Abstract: In a vehicle drive with a drive engine, power control means coupled to the engine, and a multiple gear ratio transmission without a clutch or synchronizing elements, a regulating means is coupled to the power control means for unloading the engine at the beginning of the gear change and for adjusting the speed of the engine after the old gear is disengaged to a speed corresponding to a vehicle speed with the new gear engaged.

Abstract: A change-speed gear in group-type construction with a main gear-shifting mechanism and a group gearing connected thereto. A primary shaft drives a main shaft selectively via gears of an intermediate shaft or by direct coupling of the primary shaft and the main shaft and at different speeds. The gears of the main shaft furthermore mesh with gears of the group stages of the group gearing; these latter gears are freely rotatably mounted on an output shaft and can be coupled therewith. To eliminate components and to provide a compact change-speed gear, one gear of the intermediate shaft, in addition to its function as shifting gear of the main gear-shifting mechanism, at the same times performs the function of a reversing gear for the reverse group of the group gearing.

Abstract: A change-speed transmission with a shift mechanism which selectively couples a plurality of change gears one at a time to a shaft on which the gears are journalled. The shift mechanism is disposed entirely within the transmission housing and includes a shift key arranged for axial sliding movement in a groove in the shaft. A pair of axially spaced projections at one end of the key project outwardly of the groove to embrace a collar which is journalled on the shaft. The collar is axially shifted on the shaft by a rotary shift fork which engages a circular groove in the collar to selectively position the key axially of the shaft in its several gear-engaging positions. A third radial projection at the other end of the key engages a different gear in each of the several positions thereby drivingly coupling the selected gear to the shaft to provide various forward drive speeds.