Abstract: Disclosed is a compound harmonic drive including: an inner ring gear including a first set of gear teeth; a flex spline including a flex spline inner ring and a flex spline outer ring, the flex spline inner ring forms a second set of gear teeth that engage the first set of gear teeth and the flex spline outer ring forms a third set of gear teeth; an outer ring gear including a fourth set of gear teeth that are engaged by the third set of gear teeth; and a wave generator disposed between the flex spline inner ring and the flex spline outer ring, wherein the gear system rotates about an axis and each set of gear teeth is axially aligned with each other and radially offset from each other about the axis.

Abstract: A rolling-element bearing transmission includes a rotor configured to rotate a shaft relative to a stator and a rotatable output ring that includes a first rolled-on surface element. The shaft includes at least one second rolled-on surface element, and the stator includes a third rolled-on surface element. First and second pluralities of rolling elements are located between the shaft and the stator and between the shaft and the output ring. Also, a transmission mechanism transmits a rotary motion of the shaft to the output ring with a speed reduction such that the output ring rotates at a lower speed than the shaft.

Abstract: An epicyclic gearbox assembly for a gas turbine engine includes a sun gear assembly; a planet gear assembly engaged with the sun gear assembly; and a ring gear assembly including one or more ring gears engaged with the planet gear assembly. The epicyclic gearbox assembly further includes a lubrication fluid collection assembly having a rotating oil scoop extending in a circumferential direction around the ring gear assembly, the rotating oil scoop coupled to the ring gear assembly at a location forward of one or more ring gears of the ring gear assembly.

Abstract: A drive transmitter includes an internally toothed gear, a first support shaft to rotatably support the internally toothed gear without using a bearing, a drive source to apply a driving force to the internally toothed gear, a rotary body to which the driving force is transmitted via the internally toothed gear, and a grease retainer disposed on the first support shaft and to retain grease on at least one of a portion of the first support shaft facing the internally toothed gear and a portion of the internally toothed gear facing the first support shaft. An image forming apparatus includes the drive transmitter.

Abstract: A speed reduction mechanism includes a bearing mechanism arranged on an axis of an output mechanism and including ball bearings that are arranged in parallel with each other in an axial direction of a differential case. The differential case is rotatably supported by the ball bearings of the bearing mechanism such that the entirety of an outer periphery of one of the ball bearings faces an inner periphery of a first housing element that accommodates the differential case and that is made of a material having a stiffness lower than a stiffness of a material of a rotation force applying member, and the entirety of an outer periphery of the other one of the ball bearings faces an inner periphery of the rotation force applying member.

Abstract: When an outer ring is fitted to an inner periphery of an input member, which defines a center hole, and an inner ring is fitted to an eccentric portion with clearances in a reduction-transmission mechanism, in a state where tooth tips of the input member contact bottomlands of a rotation force applying member on a line perpendicular to a second axis and a fourth axis, a size between the second axis and a third axis is set to a size that is smaller than or equal to half of a size obtained by adding a diameter difference between an outside diameter of a ball bearing and an inside diameter of the input member, which defines the center hole, a diameter difference between an inside diameter of the ball bearing and an outside diameter of the eccentric portion and an operating clearance of the ball bearing.

Abstract: An apparatus (10) for producing an orbital movement in a plane (20) is disclosed. The apparatus (10) comprises a lower shaft (40) and an upper shaft (30), being parallelly and eccentrically attached to one another, and a platform (50) mounted on the upper shaft (30). A ring gear (60) is attached to the platform (50) and coaxially rotatable about the upper shaft (30). A gear wheel (80) is coaxially rotatably mounted on the lower shaft (40) and engages with the ring gear (60).

Abstract: A wheel drive unit includes: a planetary gear mechanism including a planetary gear and an internally-toothed gear; a casing integrated with the internally-toothed gear, a wheel being attached to the casing, and the casing transmitting rotation of the internally-toothed gear to the wheel; a bearing nut configured to prevent axial movement of the casing; and an oil seal provided more toward an interior of a vehicle than the planetary gear mechanism and axially fixed with respect the casing. An inner diameter of the detachment prevention member is smaller than an outer diameter of the externally-toothed gear.

Abstract: A transmission includes a first gear set with a first sun gear member rotatable about a first axis of rotation, a first carrier member, and a first ring gear member radially outward of and concentric with the first sun gear member. The first ring gear member has a radially inward-facing surface with inner teeth and a radially outward-facing surface with outer teeth. A second gear set has a second carrier member, and a second ring gear member radially outward of and concentric with the first ring gear member. The second ring gear member has a radially inward-facing surface with inner teeth. A first annular gear has a radially inward-facing surface with inner teeth and a radially outward-facing surface with outer teeth. The first annular gear is rotatable about a second axis of rotation and meshes with the first ring gear member.

Abstract: A backlash-free planetary transmission device includes an outer ring of an eccentric sleeve rotatably fitted with a dual outer gear. One outer gear of the dual outer gear is meshed with a fixed pin gear with small teeth number difference, and the other outer gear is meshed with a power output pin gear with small teeth number difference. Each of the fixed pin gear and power output pin gear includes a roller. Profiles of teeth of the outer gears are respectively enveloped by profiles of the fixed pin gear and power output pin gear meshed therewith. The outer gears and rollers are in rolling mesh, to avoid sliding friction between meshed gear teeth. The dual outer gear contacts with the fixed pin gear and power output pin gear, with zero transmission error and zero backlash. The transmission device has high accuracy, low noise, high transmission efficiency, and long service life.

Abstract: A wheel driving device includes: a reduction mechanism of which at least a part is disposed on an inside of a wheel; a casing; a relative rotation member rotating relative to the casing; a bearing disposed between the casing and the relative rotation member; and an oil seal sealing a space where the reduction mechanism is present, wherein an outer race of the bearing includes a main body portion of which an outer periphery is disposed on an inside of the casing, and an extending portion which extends from the main body portion in an axial direction and of which an outer periphery is exposed from the casing, and the oil seal abuts on the extending portion and the relative rotation member.

Abstract: A transmission includes a first gear set with a first sun gear member rotatable about a first axis of rotation, a second sun gear member rotatable about the first axis of rotation, a carrier member, and a ring gear member radially outward of and concentric with the first sun gear member. A first annular gear meshes with the first sun gear member, and a second annular gear meshes with the first annular gear, the second sun gear member, and with the ring gear member. The first annular gear is rotatable about a second axis of rotation and the second annular gear is rotatable about a third axis or rotation.

Abstract: A motor vehicle seat fitting includes a fitting top part with a ring gear (21) having internal toothing, a fitting bottom part with a gear wheel (4), having external toothing and which is in engagement with the ring gear, an eccentric arranged rotatably in a bore (7) of the bottom part running axially to the gear wheel, for rolling adjustment of the gear wheel relative to the hollow gear, and a drive shaft, which drives the eccentric and extends axially to the ring gear. A cam receptacle (17) is arranged on one of the gear wheel or the ring gear (21) and a stop cam (16), that engages in the cam receptacle, is arranged on the other of the gear wheel or ring gear, in a ring portion between the external toothing and the bore and on the ring gear in a zone which may overlap the ring portion.

Abstract: When a bearing includes outer and inner rings and the outer ring is fitted to the inner periphery of an input member, which defines a center hole, with a clearance and the inner ring is fitted to an eccentric portion with a clearance, a size between a second axis and a third axis is set to a size that is smaller than or equal to half of a size obtained by adding a diameter difference between an outside diameter of the bearing and an inside diameter of the input member, which defines the center hole, a diameter difference between an inside diameter of the bearing and an outside diameter of the eccentric portion and an operating clearance of the bearing in a state where the input member has been moved to contact the housing on a line perpendicular to the second axis and a fourth axis.

Abstract: A transmission includes a first gear set with a sun gear member rotatable about a first axis of rotation, a carrier member, and a ring gear member radially outward of and concentric with the first sun gear member. A first annular gear meshes with the sun gear member, and a second annular gear meshes with the first annular gear and with the ring gear member. The first annular gear is rotatable about a second axis of rotation and the second annular gear is rotatable about a third axis or rotation.

Abstract: A fitting (10) for a vehicle seat, in particular for a motor vehicle seat, includes a first fitting part (11), on which a ring gear (17) is formed, a second fitting part (12), on which a gear (16) is formed, which gear meshes with the ring gear (17), whereby the two fitting parts (11, 12) are in a transmission connection with each other, and a rotating eccentric (27, 35) for driving a relative rolling motion of the gear (16) and the ring gear (17). The eccentric is driven by a carrier (21), wherein the eccentric (27, 35) is rotatably supported in a collar (38), which is associated with one of the two fitting parts (11, 12), or in a bushing (28) sitting in said collar (38) in a rotationally fixed manner. A blocking element (50) for the eccentric (27, 35) is operative at least at times between the eccentric (27, 35) and the bushing (28).

Abstract: A speed change gear includes: an internal gear member; an eccentric member; an oscillating member; a pair of first and second rotating members; and a pin that is supported at both ends by insertion holes of the first and second rotating members. The insertion hole and the insertion hole have the same diameter. The outside diameter of the other side end portion of the pin is smaller than the outside diameter of one side end portion of the pin such that the one side end portion is press-fitted in the corresponding insertion hole and the other side end portion is supported by the corresponding insertion hole.

Abstract: A transmission includes a coplanar gear set with a first sun gear member rotatable about a first axis of rotation, a second sun gear member rotatable about the first axis of rotation, a carrier member, and an outer gear radially outward of and concentric with the first sun gear member. A first annular gear meshes with the first sun gear member, and the outer gear meshes with the first annular gear and with the second sun gear member. The first annular gear is rotatable about a second axis of rotation and the outer gear is rotatable about a third axis or rotation.

Abstract: A transmission includes a first gear set with a first sun gear member rotatable about a first axis of rotation, a second sun gear member rotatable about the first axis of rotation, a carrier member, and a ring gear member radially outward of and concentric with the first sun gear member. A first annular gear meshes with the first sun gear member, and a second annular gear meshes with the first annular gear, the second sun gear member, and with the ring gear member. The first annular gear is rotatable about a second axis of rotation and the second annular gear is rotatable about a third axis or rotation.

Abstract: A transmission includes a first gear set with a first sun gear member rotatable about a first axis of rotation, a first carrier member, and a first ring gear member radially outward of and concentric with the first sun gear member. The first ring gear member has a radially inward-facing surface with inner teeth and a radially outward-facing surface with outer teeth. A second gear set has a second carrier member, and a second ring gear member radially outward of and concentric with the first ring gear member. The second ring gear member has a radially inward-facing surface with inner teeth. A first annular gear has a radially inward-facing surface with inner teeth and a radially outward-facing surface with outer teeth. The first annular gear is rotatable about a second axis of rotation and meshes with the first ring gear member.

Abstract: A transmission includes a coplanar gear set with a first sun gear member rotatable about a first axis of rotation, a second sun gear member rotatable about the first axis of rotation, a carrier member, and an outer gear radially outward of and concentric with the first sun gear member. A first annular gear meshes with the first sun gear member, and the outer gear meshes with the first annular gear and with the second sun gear member. The first annular gear is rotatable about a second axis of rotation and the outer gear is rotatable about a third axis or rotation.

Abstract: A transmission includes a first gear set with a sun gear member rotatable about a first axis of rotation, a carrier member, and a ring gear member radially outward of and concentric with the first sun gear member. A first annular gear meshes with the sun gear member, and a second annular gear meshes with the first annular gear and with the ring gear member. The first annular gear is rotatable about a second axis of rotation and the second annular gear is rotatable about a third axis or rotation.

Abstract: Disclosed is an adjustment fitting for a motor vehicle component, especially a vehicle seat. Said adjustment fitting comprises a first part and a second part which is rotatable relative to the first part about a rotational shaft by means of a gear unit. The gear unit encompasses a first gear on the first part of the fitting and a second gear on the second part of the fitting, the second gear being disposed eccentric to the first gear. Two wedge segments are provided for securing the eccentric arrangement of the first gear relative to the second gear. The inventive adjustment fitting is characterized in that the wedge segments have an inner radius and an outer radius while the adjustment fitting further comprises a decelerating element which is fitted with an extension that starts at the rotational shaft, runs in an axial direction, and corresponds approximately to the outer radius of the wedge segments.

Abstract: The invention relates to an actuator (10) for units comprising a planetary gear (14), especially a planetary differential gear, whose radially inward region is embodied as a hollow shaft and which is equipped with a drive unit and a driven shaft that cooperates with the unit to be operated. A drive shaft of the planetary gear (14) is connected to the drive unit and can be driven by the same. Said drive shaft is configured as a first hollow shaft (16) while the driven shaft is embodied as a second hollow shaft (40). A planet carrier (28) is provided that is connected to the first hollow shaft (16) or is embodied with the radially inward region thereof as a first hollow shaft (16) in such a way that a rotary movement is also performed by the planet carrier (28) when the first hollow shaft (16) rotates while the drive unit as well as the first (16) and the second hollow shaft (40) encompass a common axis of rotation.

Abstract: The problem to be solved is to provide a seat lifting assembly where lesser angular movement of the lifting means provide larger increase or decrease in the height of the seat and the problem is solved by providing a seat lifting assembly having a lifting means, an assembly of gears, arrangement of shafts and link which provides higher movement to seat with respect to smaller angular movement of lifting means.

Abstract: A parallel eccentric electro-mechanical actuator provides motive power and includes an electric prime mover that drives the reducer's pinion gear. This pinion drives minimum three star gears with stationary shaft bearings. Each shaft contains an eccentric which are completely in parallel with each other. These eccentrics can be thought of as parallel/in-phase driven crankshafts. Each eccentric drives the parallel eccentric (PE) gear through a bearing. The PE gear exhibits a circular motion (without rotation) which in itself is unbalanced. The crankshafts have another eccentric which create an opposite inertia force to balance that of the PE gear. The PE gear contains an external toothed gear on its periphery. It meshes with the internal teeth of the output ring gear. The relative motion between the PE gear and the ring gear is that the PE gear rolls inside the ring gear. This relative motion is called hypo-cycloidal motion.

Abstract: To facilitate an integrating operation and to make fabricating cost inexpensive. An idle gear for transmitting rotation of an input gear of a drive motor to a cylindrical gear is rotatably supported by an input side end portion of a specific one crank pin, and therefore, the idle gear may simply be supported by the crank pin, further, a length in an axial direction of the cylindrical gear brought in mesh with both of the idle gear the input gear is sufficiently to a degree of being more or less longer than a distance between remote side ends of the two gears.

Abstract: The invention relates to a hydrostatic, slow-speed rotary cylinder engine comprising a power part (1) which acts as an output, said power part comprising a central, stationary stator (4), a rotary cylinder (6) which is used as a rotor and a shaft (2) which is mounted in a central manner on both sides of the roller bearings (10, 11) which are arranged directly adjacent to the power part (1). Supply and discharge of tooth chambers comprising the working fluid is controlled by means of a disk-shaped rotational valve (3) which is mounted in a continuously centered manner in relation to the shaft (2) and the stator (4). A toothed wheel drive is arranged between a shaft external toothing (14) and an internal toothing (17) of a stationary internal toothed ring (28; 92) as a synchronous drive for the rotational valve (3). The toothed wheel drive is subsequently arranged in the leakage oil region of the engine and is formed by a planetary gear (80) or, preferably, by an eccentric gear (30).

Abstract: An oscillating inner gearing planetary gear system is provided which does not need to occupy a large space even in a state where a driving source is joined. In particular, the axial length thereof can be shortened, and a large diameter hollow shaft therethrough can be formed. The oscillating inner gearing planetary gear system (100) is configured in such a manner that rotation of an input shaft (104) is reduced by internal oscillating bodies (116A, 116B) oscillatingly rotating relative to an external gear (118), and the reduced output is delivered by the external gear (118) also serving as an output shaft. A middle shaft (108) is located parallel to the external gear (118) at a position more radially outward than the internal oscillating bodies (116A, 116B). An orthogonal gearset (106) connects the middle shaft (108) and the input shaft (104) at a right angle.

Abstract: Elastic deformation of bridge portions in an externally toothed gear and external teeth is suppressed, and this extends the life of tooth surfaces of external teeth 19, improves vibration characteristics, and markedly increases output torque while preventing a planetary gear device 11 from becoming large in size.

Abstract: Self-contained rotary actuator provides motive power in automated mechanical systems and includes cross-roller bearing as a structural joint. Outer attachment shell rigidly interfaces the mechanical system and contains motor stator and internal bull gear. Internal bull gear, with internal gear teeth, interfaces cross-roller bearing, and provides stiffness. Output attachment plate mechanism includes internal ring gear and supports drive shaft bearings. Internal ring gear, with internal gear teeth, rigidly interfaces output attachment plate. Drive shaft holds prime mover rotor and eccentric and associates output attachment plate via the drive shaft bearings. Gear train includes circular arc, external teeth meshing gear for meshing with internal teeth of internal bull and internal ring gears and walks minimal external gear teeth per prime mover rotor rotation.

Abstract: A motor-incorporated hypocycloid-type speed reducer includes: a motor housed in a case; a first larger internal gear; a second smaller internal gear coaxial with a motor shaft; an output shaft coaxial with the motor shaft, the output shaft being provided with the second internal gear; and an external gear. A motor core of the motor is provided with an eccentric portion eccentric to the motor shaft at a predetermined degree. The external gear, which has a first external gear engaged with the first internal gear and a second external gear engaged with the second internal gear, is further provided with a rotor-receiving portion rotatable integrally with the eccentric portion of the motor core. The rotor-receiving portion is coaxial with the first external gear and the second external gear.

Abstract: A series of gear systems is disclosed, each of which comprises least one double-shaft, reversible planetary stage including a combination of an open positive gear system having lantern-gear teeth and an output system. “z1” represents the lantern-gear arrangement, and a number of teeth z2 is assigned to at least one planetary gear. The series of gear systems comprises several variants of size categories. Each of the several variants comprises internal gears in which external rollers are seated in grooves such that the intervals are different in the different variants and are produced by the regular elimination of individual external rollers.

Abstract: A self regulating continuously variable torque transmission in which two planetary gears of lesser diameter drive two internal gears of greater diameter by orbiting and rotating around an output shaft which forms the rotational axis of the ring gears. Planetary gear orbit is constant while rotation is variable. Loads greater than available torque cause the ring gears to rotate at a lesser velocity than torque input, causing the planetary gears to rotate at a lesser velocity than torque input. To compensate for this, a carrier mounted on the output shaft rotates at a reduced velocity, reducing planetary gear rotation. This carrier provides two diametrically opposed axes, one each for two crankshafts which rotate on these axes during reduced planetary gear rotation, carrying each planetary gear in orbit around a separate axis. These two movements are created by an input crankshaft with one throw and a second crankshaft mounted by bearings on the input throw.

Abstract: A micro gear system, operating according to the principle of a strain wave gear system, a Wolfrom gear system, or a similar planetary gear system comprises at least one sun wheel (14) and at least two planet wheels (16) meshing with the sun wheel (14). The sun wheel (14) is rotatably fixed to drive shaft (20) placed along a longitudinal axis (18) of the gear system. The planet wheels (16) indirectly or directly mesh with a toothing which is rotatably fixed to a drive shaft (28) placed centrally along the longitudinal axis of the gear system. The drive shafts (20,28) are embodied as hollow shafts (30,32) having continuous bore holes (34,36) such that information or fluid media can be directed through the gear system. A sealing system (42) comprising a labyrinth seal (44) which includes a plurality of annular grooves (46) is disposed between the hollow shafts (30,32).

Abstract: A gear train is provided including an output shaft rotatable about an output axis, a housing rotatable relative to the shaft, a toothed washer having a circumferential first toothed surface, an eccentric that is rotatably disposed on the shaft and has an eccentric driving surface offset relative to the axis by an eccentricity, the eccentric comprising a driving region, an annular gear comprising a circumferential second toothed surface, a circumferential third toothed surface and an eccentric driven surface cooperating with the driving surface, a gearwheel comprising a circumferential fourth toothed surface, the first toothed surface of the washer and the second toothed surface of the annular gear meshing together in a first angular position and forming a first nutating gear having the eccentricity and the third toothed surface of the annular gear and the fourth toothed surface of the gearwheel meshing together in a second angular position.

Abstract: A reduction gear for a starter-generator of an internal combustion engine, wherein the starter-generator is functionally linked with the crankshaft (2) via a drive belt (6). A planetary gear is mounted in the force-transmitting path between the crankshaft (2) and a first belt pulley (6) that is coaxial to the crankshaft. The aim is to create a reduction gear which provides the gear ratio required for the starting mode and which can be switched in such a manner that it can be operated in any mode of operation. To this end, the reduction gear (8) is a planetary stage that includes a housing (10), an internal gear (11), a sun gear (14), a cage (15) and a planetary ring (16) with internal (18) and external (17). The internal gear intermeshes with the external teeth (17) of the planetary ring (16) and is functionally linked with the crankshaft (2) of the internal combustion engine.

Abstract: Axial positions of two driven external gears 66 making up each of a plurality of paired-gear groups 67 with respect to an input shaft 62 are made identical, and a different paired-gear group 67 is arranged by being offset in the axial direction of the input shaft 62. Therefore, only two driven external gears 66 making up the paired-gear group 67 are present at an identical axial position of the input shaft 62. Consequently, even if the diameters of these driven external gears 66 are made large up to the very limit, these driven external gears 66 do not interfere with each other. Accordingly, it is possible to readily enlarge the reduction ratio based on the driving and driven external gears 65 and 66.

Abstract: A low-vibration and precise electrically driven actuator is provided. A disk is fixed to an input shaft, and a planetary gear is fixed to an output shaft. A circular recess is formed in the disk so as to be eccentric with respect to the input shaft. A ring gear engaged with the planetary gear is rotatably supported by the circular recess. A weight portion W is provided in an unrecessed portion of the disk in order to recover an axial dynamic balance of the disk, which is lost by arranging the circular recess and the ring gear. Since the planetary gear is coaxially fixed to the output shaft, it does not make an eccentric motion and thus its dynamic balance is secured. Accordingly, the axial dynamic balance can be secured in every individual rotating element composing a gear device. The gear device is employed in the electrically driven actuator for the purpose of providing an electrically driven actuator with a low vibration and a property of high precision.

Abstract: A power transfer assembly is provided with a coplanar gear assembly. The coplanar gear assembly can be utilized in a differential, a multi-speed transmission, a four-wheel drive transfer case, and a fluid pump.

Abstract: A seat reclining device has an external gear member and an internal gear member positioned in opposing relation, and a stopper member between the opposing gear members for regulating the reclining movement of the backrest relative to the seat cushion. The stopper member includes a first convex portion on the external gear (or internal gear) member and a stopper provided on the outer peripheral surface of the internal gear (or external gear) member. A second convex portion is also provided on the external gear (or internal gear) member. By engaging the second convex portion with a bore on a ring member that surrounds the periphery of the internal and external gear members, a part of the contact force between the stopper and the first convex portion is transmitted to the ring member.

Abstract: Axial positions of two driven external gears 66 making up each of a plurality of paired-gear groups 67 with respect to an input shaft 62 are made identical, and a different paired-gear group 67 is arranged by being offset in the axial direction of the input shaft 62. Therefore, only two driven external gears 66 making up the paired-gear group 67 are present at an identical axial position of the input shaft 62. Consequently, even if the diameters of these driven external gears 66 are made large up to the very limit, these driven external gears 66 do not interfere with each other. Accordingly, it is possible to readily enlarge the reduction ratio based on the driving and driven external gears 65 and 66.

Abstract: A power transfer assembly is provided with a coplanar gear assembly. The coplanar gear assembly can be utilized in a differential, a multi-speed transmission, a four-wheel drive transfer case, and a fluid pump.

Abstract: An eccentric gear comprises two differently large gear rings (6, 7), of which an outer ring (6) has a certain number of inwardly directed teeth and an inner ring (7) has a smaller number of outwardly directed teeth, of which only a few engage with the outer gear ring, in that the inner gear ring is eccentrically mounted in bearings. The inner gear ring (7) is integrated with a casing part (8) whose geometrical axis of rotation (A) is oblique relative to an axis of symmetry (B) through the center of the outer gear ring (6). During the generation of the inner gear ring, the casing part is submitted to a nutating motion, during which the axis of rotation (A) of the casing part moves as a generatrice along an imaginary cone, around a cone apex (C) that is axially distanced from the gear rings (6, 7).

Abstract: Trochoidal tooth form gear assemblies for in-line mechanical power transmission, gear reduction and differential drive employ internally meshed gear sets having differing numbers of trochoidal gear teeth, all of which are in continuous contact as one gear rotates and orbits relative to another. Coupling and output rotors having external trochoidal gear teeth profiles rotate and/or orbit in mesh with conjugate internal trochoidal gear teeth in stators or coupling rotors. A differing number of teeth between the meshed external and internal gear teeth provides gear reduction of rotational speeds through axially aligned input and output shafts. In certain embodiments, couplers are eccentrically mounted upon axially extending pins to translate the orbital motion of a meshed gear to shaft rotation. The gear sets can be combined in series to provide various gear reduction ratios as functions of the differing number of meshed gear teeth.

Abstract: Articulated fitting for seats having an adjustable backrest, in particular motor vehicle seats. The articulated fitting arranged on each longitudinal side of a seat has a stationary articulated part associated with the seat part and a swivelable articulated part associated with the backrest, these articulated parts being connected with one another via a swivel axle. The position of the two articulated parts relative to one another is determined by an adjusting and fixing device constructed as a gear unit. The swivel axle has an eccentric portion for supporting one articulated part and the swivel axle of each articulated fitting has a central receptacle serving to connect with a transmission rod so as to be fixed with respect to rotation relative thereto, which transmission rod couples the two articulated fittings of a seat with one another.

Abstract: An articulation used in automobile seats, comprising: a mobile flange having a mobile flange inner toothing; a double satellite; a fixed flange having a fixed flange inner toothing for cooperating with said double satellite, the toothings of which mesh on one side with the fixed flange inner toothing of the fixed flange, and on another side with the mobile flange inner toothing of the mobile flange; an eccentric acting on the double satellite; a driving axis of the eccentric provided with at least one snug, the eccentric being made of two discs angularly mobile with respect to one another, each disc having an arched window; and a resilient element, said discs being connected to one another by said resilient element housed in said arched windows, while a central portion of each of said discs is formed with at least one circular recess, extended by a hollow housing adapted for receiving one of said snugs, and wherein each disc is noncircular and housed inside a bore of the double satellite; the two discs, when

Abstract: The vehicle seat articulation includes a fixed flange fixed to a first framework of the seat, a mobile flange rigidly connected to a second framework of the seat, a cup member enabling the mobile flange to execute an orbital movement causing an angular movement of the articulation, and a dish member maintaining the mobile flange against the fixed flange. The edge of the dish member is formed with an outer toothing that cooperates with toothings of semi-cut portions of the mobile flange. The toothings of the edge of the dish member and the toothings of the semi-cut portions have each a height equal to twice that of an off-center distance "e" provided between two shoulders of the cup member.

Abstract: A gear reducer for reciprocal rotation wherein the rotation of a motor 1 is transmitted to a worm pinion 4 integrated with an input shaft 2, and is further transmitted to a helical worm wheel 10. The helical worm wheel 10 and an eccentric member 11 are spline coupled to each other, and a pin flange 13 is rotated by a planetary gear structure of a trochoid-tooth-profile inscribing type. Consequently, a pinion shaft (output shaft) 14 integrated with the pin flange 13 rotates, and an outside gear 19 rotates.

Abstract: A speed reduction device employing a housing with rotatably mounted input and output shafts. The input shaft includes an eccentric shaft upon which is rotatably mounted a gear wheel. The gear wheel meshes with a ring gear fixed to the housing. The gear wheel has close but not equal to the same number of teeth as the ring gear. A dynamic coupling is provided between the gear wheel and the output shaft. The dynamic coupling includes circular cavities on opposed surfaces on the gear wheel and output shaft, respectively, with balls located between surfaces in the cavities. One set of cavities is enlarged to accommodate the eccentric motion of the gear wheel.