Abstract: A particularly compact planetary gear mechanism includes an axially shiftable ring gear to provide either a direct drive mode or a speed reduction ratio mode between an input sun gear thereof and an output planet carrier thereof. In a first embodiment, the ring gear is urged in a first direction by a compressible spring apparatus to a conjoint coupled relationship with the sun gear for direct drive. In a less frequently used mode the ring gear is urged by a hydraulically actuated annular piston closely encircling it into a fixed relationship with a stationary coupling in opposition to the compressible spring apparatus. A second embodiment has no spring apparatus so that the annular piston is hydraulically biased in either axial direction for positively shifting the ring gear.

Abstract: A countershaft transmission provides at least three forward and three reverse speeds and includes a first countershaft having a second gear secured thereto, a third gear rotatable thereon, and a first clutch for connecting the third gear thereto. A second countershaft has a fourth gear secured thereto which is intermeshed with the second gear, a fifth gear rotatable thereon, a sixth gear rotatable thereon, a seventh gear secured thereto, a second clutch for connecting the fifth gear thereto, and a third clutch for connecting the sixth gear thereto. A first gear is adapted to drive one of the side-by-side third and fifth gears, and a third countershaft is disposed elevationally below them. The third countershaft has an eighth gear secured thereto which is intermeshed with the sixth gear. Ninth and tenth gears are rotatable on the third countershaft and are selectively connected thereto by a fourth clutch and a fifth clutch respectively.

Abstract: A compact countershaft transmission includes three shafts, a plurality of gears, and low, high and reverse clutch assemblies to provide either one or two forward speeds and one reverse speed. The low and high clutch assemblies are arranged along the second shaft and the reverse clutch assembly is located along the third shaft. The countershaft transmission provides a moderate drop height between the first and third shafts, and is coupled to a trailing planetary transmission that provides a plurality of speeds for each range of the countershaft transmission. The countershaft transmission is compatible with a PTO section and provides positive drive to a plurality of pumps.

Abstract: A countershaft transmission auxiliary drive mechanism is provided for a countershaft transmission having an input shaft and a first gear connected thereto, and a second shaft having a second gear connected thereto and engaged with the first gear. A pump drive shaft is laterally offset from the first and second shafts, first and second pumps are connected to the opposite ends of the pump drive shaft, and a drive train is provided for rotating the pump drive shaft as a function of input shaft rotation. A PTO shaft and associated rotating clutch can be in coaxial alignment with the input shaft.

Abstract: A compact planetary transmission includes a plurality of interconnected planetary gear sets arranged along a common axis, and a plurality of brake assemblies and a clutch assembly used therewith to provide up to five speeds. It is preferably coupled to a leading reversible countershaft transmission to provide the desired speeds for an agricultural tractor, earthmoving vehicle or the like.

Abstract: A compact transmission is provided which includes a leading two speed forward and one speed reverse countershaft transmission, and a trailing five speed planetary transmission to give ten forward and two reverse speeds particularly adaptable to an agricultural vehicle. Very desirable speed steps are achieved between gears in the greatest working range, and the transmission provides an elevated PTO function and auxiliary pump drives within the envelope.

Abstract: A vehicle transfer gear and drive line brake mechanism (16) includes a depending gear transfer train (22) having a rotatable shaft (36) and an output gear (28) connected to the shaft (36). A drive line brake assembly (40) is operatively associated with the shaft (36) on a lower axis (30) and a housing (58,118,120) is provided for defining an enclosed compartment (116) for containing them and a common lubricating fluid. A baffle element (186) divides the enclosed compartment (116) into a brake chamber (126) containing the brake assembly (40) and a separate sump chamber (126) and directs fluid away from the brake chamber (126) to the sump chamber (126) in response to rotation of the shaft (36) in order to reduce fluid drag losses.

Abstract: An annular multi-piston brake apparatus (8) for selective holding engagement against a rotatable element (34). The annular multi-piston brake apparatus (8) advantageously includes first and second brake pistons (40,46) radially overlapping to allow the pistons to individually contact the rotatable element and stop rotation. Compact packaging of the brake apparatus is featured.

Abstract: A transfer gear mechanism (24) for a four-wheel drive tractor (10) or the like includes a depending gear transfer train (28) that has an input gear (34) on an upper axis (36) and an output gear (38) on a lower axis (40). Housing means (26) are provided for supporting the gear transfer train (28), a pump (196) along the upper axis (36), and a PTO clutch assembly (52) along a third axis (54) between the upper and lower axes (b 36,40) such that the PTO clutch assembly (52) is disposed underneath the pump (196) at an effective location. A service brake assembly (44) is also disposed on the lower axis (40) and it, the pump (196), and the PTO clutch assembly (52) can be individually serviced.

Abstract: A planetary transmission (10) is disclosed for a vehicle or the like which has input and output members (100,16), and first and second planetary gear sets (26,28). The second planetary gear set (28) has a second sun gear (154) connected to the input member (100), a second ring gear (156) connected to a first sun gear (138) of the first planetary gear set (26), and a second planet carrier (160) connected to the output member (16). A coupling device (162) is used for connecting the first and second planet carriers (144,160) for joint rotation which is at least in part disposed radially outwardly of the second planetary gear set (28). Brake assemblies (38,46) are provided for selectively holding the second and first ring gears (156,142) stationary and providing forward and reverse modes of operation respectively.

Abstract: A planetary transmission (10) is disclosed including a front section (42/160) having a rotating housing (46/176) and a planetary gear set (20/162) with a ring gear (66/168), a sun gear (68/170) and a planet carrier (70/172). Advantageously, the rotating housing (46/176) serves as the input and one of the planet carrier (70) and the ring gear (168) serves as the output. The sun gear (68/170) is continually held stationary, a first clutch assembly (30/164) selectively connects the rotating housing (46/176) to the ring gear (66/168), and a second clutch assembly (32/166) selectively connects the rotating housing (46/176) to the planet carrier (70/172). The front section (42/160) of the transmission (10) is operatively connected to a rear section (44) for multi-speed use particularly adaptable to a truck or earthmoving vehicle.

Abstract: A planetary transmission (10) is disclosed including a front section (48) having a rotating housing (52) and a planetary gear set (18) with a ring gear (62), a sun gear (64) and a planet carrier (66). Advantageously, the ring gear (62) is the input and the rotating housing (52) is the output, and the sun gear (64) is continually held stationary. A first clutch assembly (32) connects the planet carrier (66) to the rotating housing (52) and provides underdrive and a second clutch assembly (34) connects the ring gear to the rotating housing (52) and provides direct drive. The front section (48) is operatively connected to a rear section (50) for multi-speed use especially adaptable to an agricultural vehicle.

Abstract: A reversible friction plate including a generally circular, disk-like member having generally parallel, opposed friction surfaces, an opening in the center of the member, at least three, equally angularly spaced tangs extending radially outwardly from the periphery of the member, reaction member receiving apertures in each tang displaced from the center thereof in the circumferential direction, the reaction member receiving apertures in each tang being equally angularly spaced, and a spring mounting formation on each tang displaced from the center thereof in the circumferential direction oppositely from the reaction member receiving apertures. Also disclosed is a friction pack utilizing a plurality of the friction plates and a planetary gear transmission employing such a friction pack which eliminates precision machining in the fabrication thereof.

Abstract: A torsional vibration damping assembly including plates (14,16,18) between which is interposed friction material (30). The plates are held in an assembly and limited against motion by unthreaded reaction pins (38) supported at both ends. The friction material (30) is located radially outwardly of the usual spring assemblies (28) to increase the moment arm over which frictional forces may act. The central plate (16) has a smaller central aperture (22) than the central apertures (20,24) in the adjacent plates and is provided with spline teeth (25) having an axial length substantially no greater than the thickness of the plates (16) so as to allow a coupling (50) to be canted with respect to the rotational axis of the assembly during assembly of a transmission input shaft thereto.

Abstract: A transmission arrangement for a vehicle having a normal longitudinal direction of movement includes a housing assembly, a transmission having an output shaft, the transmission being mounted within the housing assembly, a transfer gear train driven by the output shaft and mounted within the housing assembly, and a bevel gear and cross shaft assembly mounted within the housing assembly and driven by the transfer gear train, the bevel gear and cross shaft assembly being located longitudinally between the transmission and the transfer gear train.

Abstract: In a dual transmission system, the front transmission has a three-speed gearbox with a low, intermediate and a 1:1 input-to-output speed ratio coupled to a three-speed range unit to provide seven usable forward speeds. A converter lock-up clutch is used to provide direct mechanical drive in the upper six gears. The rear transmission has an identical three-speed range unit. An additional gear train is added to the rear transmission to provide four speeds. The additional very low speed is used in conjunction with the lowest speed of the front seven-speed transmission. Both transmissions are operated in torque converter drive in first gear only. When any of the speed ranges of the front range unit is used in conjunction with the low or intermediate input-to-output speed ratio of the front gearbox the same speed range of the rear transmission is coupled by a torque converter to the rear engine.

Abstract: A vehicle transmission couples a plurality of input driven planetary arrangements with a plurality of selectable direct drive gear reduction means. The plurality of input driven planetary arrangements include a reverse planetary gear arrangement and in the preferred embodiment two forward planetary gear arrangements. The two forward planetary gear arrangements, each of which includes a ring gear which may be stopped, share a common planet carrier which drives the selectable direct drive gear reduction means. The reverse planetary gear arrangement includes a planet carrier which may be stopped, thus an associated reverse ring gear rotates in an opposite direction relative the input shaft. The reverse ring gear is coupled to the common planet carrier of the forward planet section. The direct drive section includes three drive gears in the preferred embodiment rotatably mounted on a quill shaft driven by the common planet carrier and coaxially mounted about the input shaft.

Abstract: A transmission having geared steer with six forward and six reverse speeds is provided. Alternate power turn radii steering options are also provided for high and low speed operation. Hydraulic disengagement of the transmission brake is accomplished by injecting lubricant fluid from an external source, so as to permit assembly or towing. An improved arrangement of power train components facilitates their assembly and disassembly.

Abstract: A compact combination of planetary gear sets together with a torque converter and drive conditioning clutches and brakes provides for a broad range of output speeds in either mechanical or converter drive with a nearly constant small step ratio between speeds and with a relatively small variation of transmitted power throughout a very broad range of output speeds.

Abstract: A compact low inertia planetary gearing system for use in tandem with a multispeed range transmission provides for transmitting drive to the range transmission in either a forward or a reverse direction with a one-to-one drive ratio in either direction. The drive direction determining gearing system includes input and output gears having an equal number of teeth but which are of differing diameter and thus have teeth of differing pitch. Planet gears which are compound pinion gears each have a first set of teeth engaging the larger diameter one of the input and output gears and each have a second set of teeth of reduced diameter which engage the other of the input and output gears through an idler gear, the teeth of the second set being equal in number to the teeth of the first set but being of finer pitch.