Abstract: The object of the present invention is to provide a drive unit including a movable gear section having a first pinion gear and a second pinion gear, which are coaxially integrated. A driving mechanism is provided for spinably moving the movable gear section in a circular orbit. A fixed ring gear is coaxial arranged relative to the circular orbit, the fixed ring gear having a first gear section, formed on a circumferential face, wherein the first pinion gear is engaged with the first gear section, and wherein the movable gear section is spun when the movable gear section is moved in the circular orbit. An output ring gear is coaxial positioned relative to the fixed ring gear and is capable of rotating with respect thereto. The output ring gear includes a second gear section, formed on a circumferential face, wherein the second pinion gear is engaged with the second gear section, and wherein the output ring gear is rotated when the movable gear section is spun.

Abstract: A drive train for transmitting torque produced by a load comprises a planetary gear arrangement mounted concentrically with respect to a tubular shaft. The planetary gear arrangement cooperates with a pair of driven gears which are also coaxial with the tubular shaft, the planetary gear arrangement and the pair of gears being located within an outer housing. The tubular shaft provides an unobstructed, large diameter passage through the drive train, the passage being available for the routing to a load connected to one of the driven gears of movable shafts, conduits or electrical conductors.

Abstract: An epicyclic roller gear (100) has two rings (1 and 4) provided with an inner profile. One ring (1) is fixed and the other ring (4) is parallel or coaxial to the first ring (1) and is rotatably mounted with respect thereto. The number of teeth on the two rings is different. Both rings (1 and 4) have at least two parallel internal profiles (1.1, 1.2, 4.1 and 4.2) which are offset in the circumferential direction by a fraction of the pitch of the profile or teeth. When each ring has two mutually offset internal profiles, they are mutually offset by half the pitch of the teeth, so that in this case the gaps of the one tooth system are occupied by the teeth of the second, adjacent tooth system. This results in a high contact ratio with the corresponding complementary profiles of a rolling element, preferably a roller carrier (5) with rotatable rollers which roll in the gaps between the teeth of the internal profiles.

Abstract: The present invention teaches a wobble-hinged metal fitting suitable for adjustable motor vehicle seats, and more particularly, for back seat gears. The fitting includes two hinged brackets connected together by an eccentric, a carrier and shaft running therethrough. Each bracket contains an internal gear and an external gear associated with the internal gear. The eccentric is positioned next to one of the gears and is turnably connected to the shaft. The eccentric includes means for compensating play in the seat which consist of an eccentric part having a receiving inlet, at least one rolling body, at least two jamming planes and at least one spring. The spring is positioned such that it pressures the rolling body to come in contact with the jamming plane on one side and the gear on the other side. The carrier is positioned such that when the rolling body is in a locked position, an initial turning movement of the shaft results in the release of the locked rolling body before the eccentric starts to move.

Abstract: The invention concerns a setting device for adjustment of the angular relative position of two components that are pivotable with respect to one another by means of planet wheels distributed along fear tracks formed is said pivotable components and arranged to roll on said gear tracks, the engagement of the teeth of said planet wheels being so adapted that upon the rolling of said planet wheels on said tracks the two pivotable components will be imparted a relative turning movement. In accordance with the invention the planet wheels are supported so as to be allowed radial movement and means are provided to urge the planet wheels radially into contact with the gear tracks.

Abstract: A jam-tolerant rotary actuator 70 through the incorporation of shear lugs 84,92 formed on an inner input sun gear member 82 and on an inner movable output ring gear member 90 which correspond to recesses 88,96 formed in an outer input sun gear member 86 and in an outer movable output ring gear member 94, respectively, where, upon application of a maximum torque to either the inner input sun gear member 82 or the outer movable output ring gear member 94, the shear lugs 84,92 will shear thereby allowing the inner input sun gear member 82 to be movable independent of the outer input sun gear member 86 or the outer movable output ring gear member 94 to be movable independent of the inner movable output ring gear member 90, respectively.

Abstract: A centrifugal planetary friction transmission comprising an input shaft, an output shaft, at least one planetary friction pulley set which is formed by three coaxially linked cylindrical external friction pulleys, and three internal pulleys. The friction forces acting on the planetary friction pulley set are mostly cancelled out by each other. According to the invention, the external friction pulleys only contact with the internal friction pulleys, and the normal pressure for producing the friction force for transmitting the torque is created by the centrifugal force of the external friction pulley set only and the transmission is a positive characteristic planetary transmission.

Abstract: A power transmission unit for an electric vehicle has a planetary-gear type speed reducer disposed between and connected to an electric motor and a driving wheel. The speed reducer has two planetary gear sets in which common pinions are engaged with a fixed first ring gear and a second ring gear acting as an output portion. The common pinions are supported to a common carrier acting as an input portion. The number of teeth of the second ring gear is set to be the same as the sum of a number of teeth of the first ring gear and a number of the common pinions, and the common pinions are located at equal distances. Therefore, the power transmission unit has a proper reduction gear ratio and a high-torque transmission characteristic which are required for an electric vehicle while the speed reducer is formed small in size.

Abstract: In a high ratio planetary transmission which includes in a housing coaxial input and output shafts and wherein a first sun roller structure is part of one of the shafts and disposed within the housing, a first traction ring is disposed within the housing around the first sun roller structure in spaced relationship therefrom, and a number of planetary traction rollers are supported in the space between the sun roller structure and the first traction ring, each traction roller has two sections of different diameters, one in engagement with the first traction ring and with the sun roller structure and the other being in engagement with a second traction ring which is operatively connected for rotation with the other of the input and output shafts.

Abstract: A seat reclining mechanism for adjusting the angular position of a seatback relative to a seat cushion by a planetary gear arrangement includes a rotatable shaft, a base plate, a pivotable arm, a control gear, a plurality of planetary gears, and a supporting member. Each planetary gear has a first boss portion. The supporting member has first and second circular holes for receiving therein the first boss portions of the planetary gears. The first and second circular holes are disposed on the supporting member such that a first distance between a rotational center of the supporting member and a rotational center of the first circular hole is shorter than a second distance between the rotational center of the supporting member and a rotational center of the second circular hole. The supporting member has a circular center hole. The pivotable arm has a second boss portion which is received in the circular center hole of the supporting member for mounting the supporting member on the second boss portion.

Abstract: A small-sized reduction gear includes: a stationary internal gear 10; a movable internal gear 20 having an internal gear; planet gears 12 in mesh with the stationary internal gear 10 and the movable internal gear 20; a holder member 15 and a holder clamp 19 which hold the planet gears 12; and a sun gear 4 in mesh with the planet gears 12 and directly connected with a motor shaft 3. The reduction gear further includes a column beam 18 provided between columns extending upwardly from the holder member 15 and, further guide sections provided in those sections where the movable internal gear 20 and the stationary internal gear 10 are in contact with each other. This construction helps to provide a small-sized reduction gear which makes it possible to obtain a high reduction ratio with a very small number of parts, which has a high level of transmission efficiency, which involves little backlash and noise, and which excels in dustproofness and can be produced at low costs.

Abstract: An actuator module for inducing the relative motion of robot members joined in a robot joint includes a Ferguson epicyclic gear train, integral motor and integrated control means. The gear train comprises a plurality of base gears connected to the robot members and a plurality of planet gear carriers, each planet gear carrier having a plurality of planet gears rotatably mounted therein. A motor integrated with certain gear train components induces the rotation of the planet gear carriers about or within the base gears. Because of the Ferguson paradox, this induces the motion of base gears connected to one robot member relative to those connected to the other robot member, which in turn causes the relative motion of the robot members. The actuator module can be configured as dual substantially symmetric systems and may comprise multiple stages of epicyclic gearing.

Abstract: A seat reclining mechanism for adjusting the angular position of a seatback relative to a seat cushion by a planetary gear arrangement includes a rotatable shaft, a base plate, a pivotable arm, a control gear, a plurality of planetary gears, and a supporting member. The pivotable arm is rotatably connected to the base plate through the rotatable shaft. Each planetary gear has two opposed cylindrical projections which are outwardly biased by the supporting member against cylindrical smooth surfaces of cylindrical recesses formed on the base plate and the pivotable arm. Therefore, the planetary gears are held in a predetermined revolution orbit around the control gear.

Abstract: A seat reclining device comprises a base plate secured to a seat base of a seat, an arm plate secured to a seatback of the seat, and a planetary gear mechanism interposed between the base and arm plates in such a manner that operation of the mechanism induces a stepless pivoting movement of the arm plate relative to the base plate. The mechanism uses respective given portions of the base and arm plates as essential parts thereof, so that separation of the given portions from each other tends to cause malfunction of the mechanism. A retainer is employed which holds the base plate and the arm plate in such a manner as to suppress the separation of the base and arm plates.

Abstract: A planetary reduction gear comprising pairs of partial planetary gears, two partial internal gears and a sun gear or comprising pairs of partial planetary gears, two partial sun gears and an internal gear in which partial planetary gears mesh with partial internal gears or with partial sun gears independently. One of the partial gears is fixed to the input shaft or to the casing. The other partial gear is loosely connected to the input shaft or to the casing by a spiral coupling which allows the partial gear to move in spiral direction. A pressing means pushes the partial gear in the axial direction. Force of the pressing means moves the partial gear in the spiral direction. The partial gear slightly rotates relatively to the other partial gear. Relative rotation of the partial gears cancels backlashes. In the case of helical gears, the spiral coupling can be replaced by an axial coupling.

Abstract: A seat reclining mechanism for adjusting the angular position of a seatback relative to a seat cushion by a planetary gear arrangement includes a rotatable shaft, a base plate, a pivotable arm, a control gear, a plurality of planetary gears, and two supporting plates. The pivotable arm is rotatably connected to the base plate through the rotatable shaft. Each planetary gear has two opposed cylindrical projections. Each supporting plate is coaxially mounted on the rotatable shaft for supporting the planetary gears in such a manner that the cylindrical projections of each planetary gear is rotatably supported by the supporting plates and that the planetary gears are held in a predetermined revolution orbit around the control gear.

Abstract: A geared rotary actuator (1 or 1') and method of assembling the same, with the geared rotary actuator (1 or 1') including a plurality of one-piece planetary gears (12 or 12'), each including a first set of gear teeth (19) meshing with a sun gear (11), and at least two additional sets of gear teeth (17, 18 or 17') respectively forming an inboard set of gear teeth and an outboard set of gear teeth respectively adapted to mesh with sets of gear teeth (13 or 13', 14 or 14'), of outboard and inboard ring gears. At least one tooth of the sets of gears (17, 18, 19 or 17', 19') are axially aligned along a length of the one-piece planetary gears (12 or 12') so as to enable the inboard ring to be moved axially past the outboard set of gear teeth (17 or 17') to mesh with the inboard set of gear teeth (18 or 17').

Abstract: A device for altering the angular relationship between input and output components of a device includes an outer housing, an inner housing disposed within the outer housing for coaxial rotation therein, a rotational energy input component engaging the inner housing through the outer housing, a rotational energy output engaging the inner housing through the outer housing at an angular position relative to the rotational energy input, the inner housing including first and second planetary gear sets in a gear carrier for transferring energy from the first set of planetary gears to the second set of planetary gears, the first set of gears being connected to the input, the second set of gears being connected to the output, a braking device for controlling the rotation of the inner housing relative to the outer housing to permit the adjustment of the rotational energy input component relative to the rotational energy output component, and a mechanism for adjusting the relative angular position of the input componen