Class / Patent application number | Description | Number of patent applications / Date published |
475072000 | Fluid pump and motor in one of plural paths to or from planetary gearing | 36 |
20090036248 | DRIVE WITH A TORQUE SPLIT TRANSMISSION - The invention concerns a drive with a torque split transmission ( | 02-05-2009 |
20090088280 | VARIABLE DELIVERY GEAR PUMP - A variable displacement gear pump device that provides variable flow while retaining the advantages generally associated with gear pumps, and without diverting pressurized fluid back to the pump inlet. In one embodiment, a gear pump includes a first gear and a second gear forming an external pump, the first gear rotatable about a fixed axis and drivingly engaging the second gear, the second gear rotating about its central axis and selectively movable in an epicyclical relationship with the first gear whereby the discharge of the pump is varied. | 04-02-2009 |
20100197438 | POWER SPLIT TRANSMISSION - A power split transmission for a working machine, such as a wheel loader, for example, has a hydrostatic and a mechanical power branch which are summed with one another via a summation gear ( | 08-05-2010 |
20100210389 | HYDROSTSATIC-MECHANICAL POWER SPLIT TRANSMISSION - A hydrostatic-mechanical power split transmission with at least two continuous operating ranges for use in agricultural and construction machines. The transmission has a summation planetary gear and a clutch for forward drive ( | 08-19-2010 |
20100285913 | Transmission With Dual IVT's And Planetary Gear Set - A work machine includes an engine and a rear end coupled with the engine. The rear end includes a transmission having a first IVT with a first output shaft, and a second IVT with a second output shaft. A planetary gear set includes a sun gear coupled with the first output shaft, a ring gear coupled with the second output shaft, a plurality of planetary gears enmeshed between the sun gear and the ring gear, and a carrier gear coupled with each of the plurality of planetary gears. A final output includes a third output shaft carrying an output gear, with the output gear being enmeshed with the carrier gear. | 11-11-2010 |
20100298081 | POWER SPLIT TRANSMISSION WITH ENERGY RECOVERY - Power split drive (PSD) transmissions capable of energy recovery and suitable for use in automotive applications. Each PSD transmission includes a mechanical transmission system for mechanically transmitting mechanical power between a rotatable input shaft and a rotatable output shaft, and a hydraulic transmission system containing a fluid for hydraulically transmitting hydraulic power between the input shaft and the output shaft, and at least a third shaft operatively interconnected to one of the mechanical and hydraulic transmission systems. The hydraulic transmission system is operatively coupled by at least a first planetary gear train to the mechanical transmission system. According to the invention, the PSD further comprises means operatively associated with at least one of the mechanical and hydraulic transmission systems for storing and releasing energy within the PSD transmission, the energy storing and releasing means comprising a flywheel or an accumulator or a combination thereof. | 11-25-2010 |
20110237379 | TRANSMISSION SYSTEM - A sun gear of a first planetary gear train is connected to an input shaft. A carrier | 09-29-2011 |
20110237380 | TRANSMISSION SYSTEM - A sun gear of a first planetary gear train is connected to an input shaft. A carrier | 09-29-2011 |
20120046138 | Power Train for Work Vehicle - A power train for a tractor includes an engine power transmission shaft extending along the longitudinal direction of the vehicle body rearwardly of an engine, and a hydrostatic stepless speed changer unit (HST) configured to input power from the engine. A pump and a motor of the HST are juxtaposed along the transverse direction of the vehicle body. A planetary gear unit is disposed rearwardly of the HST in the longitudinal direction of the vehicle body. The planetary gear unit is configured to input power from the engine via the engine power transmission shaft and power from the HST and to output a traveling power. A branch transmission mechanism is disposed forwardly of the HST in the longitudinal direction of the vehicle body and configured to transmit the power from the engine to an input shaft of the pump and to the engine power transmission shaft in distribution. | 02-23-2012 |
20120225746 | Transmission Apparatus for a Tractor - Disclosed is a transmission apparatus for a tractor which is operable to transmit a forward drive force in a wide speed changing range to the traveling device and which is operable also to transmit a reverse drive force to the traveling device in an inexpensive manner and with good transmission efficiency. A planetary transmission section ( | 09-06-2012 |
20130281244 | COLD START CLUTCH FOR CVT TRANSMISSION - A continuously variable transmission (CVT) for a vehicle engine which provides enhanced cold starting and reduced wear under all conditions. The transmission includes mechanical transmission components, hydrostatic transmission components, and a clutch to decouple only the mechanical transmission components from driving engagement with the engine or other power source. Decoupling allows cold starting with significantly reduced parasitic losses. The transmission may use a hydraulic circuit to re-engage the mechanical transmission components with the input power source and full driving re-engagement of the transmission with the power source, such as an engine, after the transmission reaches a desired speed. | 10-24-2013 |
20130281245 | DUAL DRIVE ARRANGEMENT FOR THE DRIVE OF A VEHICLE HYDRAULIC PUMP AND METHOD OF CONTROLLING THE SAME - A dual drive arrangement has three way power split device such as an epicyclic gearing system converting input rotation from a gearbox or from an electric motor into an output rotation driving a hydraulic pump. A method for controlling the dual drive arrangement driving a hydraulic pump includes setting a minimal flow value to the hydraulic pump, sensing the vehicle speed, processing the sensed vehicle speed, where the processing includes comparing the sensed vehicle speed with a reference speed value to thereby determine whether the vehicle operates in a first operational mode I where the speed vehicle is too low to drive the hydraulic pump up to the minimal flow or in a second operational mode II where speed vehicle where the speed vehicle is sufficient to meet at least the minimal flow value, and controlling the operation of the epicyclic gear so that the electric source drives the hydraulic pump when the vehicle runs under the first operational mode I and at least the gearbox drives the hydraulic pump when the vehicle runs under the second operational mode II. | 10-24-2013 |
20150045167 | HYDRAULIC POWER TRAIN FOR HYBRID VEHICLE - A hydraulic power train for a hybrid vehicle is provided, which can selectively transmit power of a hydraulic driving unit or an engine to driving wheels using a double pinion planetary gear and a synchro sleeve in addition to the hydraulic driving unit. More specifically, a hydraulic power train for a hybrid vehicle is provided, which can achieve various driving modes and maximize the fuel efficiency, by combining a hydraulic driving unit, a double pinion planetary gear, and a synchro-type transmission to implement a continuously variable transmission for a hybrid vehicle that can selectively transmit power of an engine or a hydraulic driving unit. | 02-12-2015 |
20150051037 | Hydromechanical Transmission and Assemblies - A motor vehicle | 02-19-2015 |
20150057120 | Hydromechanical Transmission with Double Sump Gear Unit Housing - A hydromechanical transmission | 02-26-2015 |
20150072823 | POWER SPLIT TRANSMISSION - A power-split transmission for a vehicle comprises a forward-reverse transmission module, an epicyclic module and a secondary power branch. The forward-reverse power shuttle module ( | 03-12-2015 |
20150133251 | Transmission Device For Work Vehicles - Disclosed is a transmission device for work vehicles, said transmission device being capable of being used with high-horsepower engines, without an accompanying loss of power transmission efficiency or fuel economy. The transmission device is provided with: an input shaft that transmits power from an engine; a continuously-variable transmission that is disposed on the input shaft and outputs power transmitted from the input shaft, steplessly converting the speed thereof; and a reversing clutch device that outputs, either in a forward rotational direction or a reverse rotational direction, power outputted from the continuously-variable transmission. The reversing clutch device can be selectively switched, and the gear ratio can be steplessly changed by the continuously-variable transmission. | 05-14-2015 |
20150292610 | CONTINUOUSLY VARIABLE POWER-SPLIT VEHICLE TRANSMISSION - A continuously variable power-split transmission is provided and comprises an epicyclic module ( | 10-15-2015 |
475073000 | Plural fluid power paths to planetary gearing | 2 |
20100062889 | Method For Controlling Two Variable Displacement Hydrostatic Units In An Infinitely Variable Hydro-Mechanical Transmission - A method is provided for adjusting the displacement angles of two hydrostatic units in an infinitely variable hydro-mechanical transmission. | 03-11-2010 |
20100120570 | Torque Transfer Device With Hydrostatic Torque Control System - A power transmission device includes a rotatable input shaft, a rotatable output shaft and a ring gear fixed for rotation with the input shaft. A carrier is fixed for rotation with the output shaft. A pump assembly includes an inner rotor supported for rotation on the carrier and an outer rotor encompassing the inner rotor. The outer rotor is in driving meshed engagement with the ring gear. The pump provides pressurized fluid to one of first and second fluid ports. A flow restrictor is moveable to selectively restrict fluid flow relative to one of the first and second ports. | 05-13-2010 |
475074000 | Plural outputs | 2 |
20090270212 | Speed Change Transmission Apparatus - The apparatus includes a hydrostatic stepless speed change section | 10-29-2009 |
20140213404 | POWER SPLIT TRANSMISSION - A power split transmission, in particular for a traction drive, having at least one drive shaft and at least one output shaft between which a mechanical first branch and a hydraulic or electrical second branch are provided that can be connected to one another at least in part by a planetary gear arrangement, wherein the second branch comprises a plurality of energy converters. The at least one drive shaft can be connected to a first energy converter and to a first connection element of the planetary gear arrangement, while the at least one output shaft can be connected to a second connection element of the planetary gear arrangement and the second and third energy converters can be connected to at least one or more further connection elements of the planetary gear arrangement and/or of the at least one output shaft. | 07-31-2014 |
475078000 | Interrelated fluid unit and gear control | 7 |
20090105028 | Transmission system - A hydro-mechanical transmission system or electromechanical transmission system is described which uses pumps/motors or generators/motors having smaller capacity than those employed in the conventional techniques, irrespective of setting of a mode switching point that is a basis for shifting between an input split mode and a compound split mode. A sun gear | 04-23-2009 |
20100069193 | METHOD OF CONTROLLING A DRIVE AND DRIVE SYSTEM - The invention relates to a method for controlling a drive system ( | 03-18-2010 |
20120108378 | TRANSMISSION SYSTEM - A sun gear of a first planetary gear train is connected to an input shaft. A carrier of the first planetary gear train is connected to a sun gear of a second planetary gear train and to a first pump/motor. A ring gear of the first planetary gear train is connected to a second pump/motor, and a ring gear of the second planetary gear train is connected to an output shaft. A first clutch is provided for engaging and disengaging a carrier of the second planetary gear train and the ring gear of the first planetary gear train with and from each other, and a second clutch is provided for engaging and disengaging the carrier of the second planetary gear train and a fixed end with and from each other. | 05-03-2012 |
20120231914 | Continuously Variable Hydrostatic Transmission Having Torque Division - A continuously variable hydrostatic transmission ( | 09-13-2012 |
20130137542 | POWER SPLIT TRANSMISSION - A power split transmission, in particular an input-coupled power split transmission, includes a mechanical branch and a hydrostatic branch connected in parallel therewith. The hydrostatic branch has a closed hydraulic circuit with a first working line and a second working line with one of the working lines carrying high pressure and the other carrying low pressure. The circuit has a pressure accumulator for pressure regulation connected to the respective working line carrying high pressure. This configuration provides a power split transmission that has a hydraulic circuit in which the respective working line carrying high pressure is hydraulically smoother or more flexible by virtue of the preferably continuous connection of the pressure accumulator. | 05-30-2013 |
20130165287 | HYDROSTATIC MECHANICAL TRANSMISSION EQUIPPED WITH AUTOMATIC MANUAL SUB-GEARSHIFT - A hydrostatic mechanical transmission according to the disclosure includes: a hydrostatic transmission which transmits power generated in an engine using a pump and a motor; a main transmission unit which transmits the engine power to a final driving unit through a driving shaft; a complex planetary gear which synthesizes and transmits the engine power transmitted from the hydrostatic transmission and the main transmission unit; and an automatic manual sub-gearshift which receives the synthesized engine power from the complex planetary gear so as to perform a transmission function and transmits the engine power to the final driving unit. | 06-27-2013 |
20130274048 | TRANSMISSION UNIT - A transmission unit comprises a planetary wheel set, which comprises a plurality of gearwheel elements and is designed as a pump which effects delivery of hydraulic fluid from a suction zone to a pressure zone of a pump casing containing the planetary wheel set by means of the gearwheel elements. A controllable throttling device is provided in order to selectively throttle a fluid flow pumped between the suction zone and the pressure zone and thereby to brake the gearwheel elements of the planetary wheel set relative to one another. A fluid reservoir, which can be connected simultaneously to the suction zone and to the pressure zone via the throttling device, is arranged in a pump casing interspace formed between a plurality of gearwheel elements of the planetary wheel set. | 10-17-2013 |
475080000 | Plural speed ranges | 7 |
20080214348 | Working Vehicle Transmission System - A working vehicle transmission system comprises a PTO device for driving an external working device by power of a prime mover, and a multistage transmission for transmitting power from the prime mover to an axle. The multistage transmission includes a main speed-change mechanism and a sub speed-change mechanism. The main speed-change mechanism has plural drive trains for setting respective different speed stages. The sub speed-change mechanism is disposed downstream of the main speed-change mechanism and has plural drive trains for setting respective different speed stages. The main speed-change mechanism includes a first clutch and a second clutch. The main speed-change mechanism drive trains used for setting odd-numbered speed stages are activated by engaging the first clutch. On the other hand, the main speed-change mechanism drive trains used for setting even-numbered speed stages are activated by engaging the second clutch. During a speed-change operation of the main speed-change mechanism, an engagement action of one of the first and second clutches and a disengagement action of the other of the first and second clutches overlap each other. A reverser is disposed upstream of the first and second clutches of the main speed-change mechanism so as to enable switching the direction of output rotation transmitted to the first and second clutches from one direction to the opposite direction. | 09-04-2008 |
20090280943 | Dual Path Hydromechanical Powertrain - A hydromechanical powertrain for a ground vehicle. The powertrain, more specifically a transmission, includes an input shaft that is coupled to a rotational power source and an output shaft that is coupled to a load. A first hydrostatic unit coupled to a first gear, while a second hydrostatic unit is selectively coupled to one of a pair of clutches. The first of the clutches has a first clutch gear that is selectably coupled to a first mode gear, which is in turn rotationally fixed to the output shaft. The second of clutches has a second clutch gear that is selectively coupled to a second mode gear, which is in turn rotationally fixed to the input shaft. Also coupled to the input shaft is a planetary gear set. | 11-12-2009 |
20100093476 | INFINITELY VARIABLE TRANSMISSIONS, CONTINUOUSLY VARIABLE TRANSMISSIONS, METHODS, ASSEMBLIES, SUBASSEMBLIES, AND COMPONENTS THEREFOR - Inventive embodiments are directed to components, subassemblies, systems, and/or methods for infinitely variable transmissions (IVT) having a variator provided with a plurality of tilting spherical planets. In one embodiment, a variator is provided with multiple planet arrays. In another embodiment, a hydraulic system is configured to control the transmission ratio of the IVT. Various inventive idler assemblies and planet-pivot arm assemblies can be used to facilitate adjusting the transmission speed ratio of an IVT. Embodiments of a transmission housing and bell housing are adapted to house components of an IVT and, in some embodiments, to cooperate with other components of the IVT to support operation and/or functionality of the IVT. Various related devices include embodiments of, for example, a control feedback mechanism, axial force generation and management mechanisms, a control valve integral with an input shaft, and a rotatable carrier configured to support planet-pivot arm assemblies. | 04-15-2010 |
20100184551 | Speed Change Transmission System - In order to provide a speed change transmission system which can be obtained compactly, while obtaining output at steplessly varied speeds over a large speed change range only by carrying out a simple shifting operation, the speed change transmission system has a hydrostatic stepless transmission to which engine drive is inputted. A planetary transmission device (P) has a plurality of planetary transmission mechanisms, for combining output of the stepless transmission and engine drive not undergoing speed change action by the hydrostatic stepless transmission. A plurality of transmission shafts are provided with a plurality of speed range setting clutches, switchable for converting the combined driving force from the planetary transmission device (P) to a driving force in a plurality speed ranges, and transmitting it to an output rotary member. The plurality of transmission shafts are juxtaposed and arranged in parallel. | 07-22-2010 |
20160131229 | METHOD FOR OPERATING A DRIVE TRAIN, AND DRIVE TRAIN - Disclosed is a method for operating a drive train having a drive shaft ( | 05-12-2016 |
475081000 | With constant speed ratio between input and one fluid unit | 2 |
20080214349 | Power-Branched Transmission and Method For the Operation of Such a Transmission - Disclosed is a power-branched transmission, particularly for agricultural vehicles such as tractors or similar, having a stepped planetary gear which is disposed between an input shaft and an output shaft and is used for dividing the power supplied at the input shaft onto a mechanical power branch and a hydraulic power branch. The hydraulic power branch is formed by two hydraulically interconnected, identical hydrostatic axial piston engines which can be selectively operated as a pump or an engine, can be swiveled within a predefined pivoting angle, and can be connected to the input shaft or the stepped planetary gear in a different manner via two respective clutches so as to cover different operating ranges or running steps. In order to obtain better efficiency in such a power-branched transmission, the two hydrostatic axial piston engines are configured as wide-angle hydrostats that are provided with a minimum pivoting angle range of 45°. | 09-04-2008 |
475082000 | Having single planet carrier | 1 |
20080227578 | INTERNAL COMBUSTION ENGINE AND VEHICLE HAVING THE INTERNAL COMBUSTION ENGINE - An engine (internal combustion engine), in accordance with an embodiment, includes: a crankcase; a crankshaft accommodated in the crankcase; a first crank gear and a second crank gear disposed inside the crankcase to rotate about the crankshaft; a balancer gear meshed with the first crank gear to rotate as the first crank gear rotates; and a water pump part having a water pump gear. The water pump gear is meshed with the second crank gear to rotate as the second crank gear rotates. The balancer gear and the water pump gear are disposed to overlap each other as viewed from an end of the crankshaft. | 09-18-2008 |