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| Number | Title | Issue Date |
| 7354368 | Method and means for shifting a hydromechanical transmission A method for achieving high quality shifts with one hydraulic unit near zero displacement when using dog clutches. This method includes selecting the proper displacement and vocation (whether the hydrostatic unit works as a pump or motor) of a low displacement hydra... | 04/08/2008 |
| 7303498 | Transmission apparatus for a working vehicle A working vehicle comprises: a power source having an output shaft; axles; a cargo deck; and a transmission apparatus for driving axles disposed below the cargo deck. The transmission apparatus includes an input shaft drivingly connected to the output shaft of the p... | 12/04/2007 |
| 7240487 | Throttle potentiometer adapter A throttle potentiometer adapter provides a direct connection between a pivot nut on a hand throttle linkage and the internal sleeve of a potentiometer. The potentiometer provides a voltage output to an electronic controller, the voltage output corresponding to the ... | 07/10/2007 |
| 7241242 | Two-mode compound-split hydraulic continuously variable transmission A two-mode compound-split hydro-mechanical powertrain employs a hydro-mechanical continuously variable transmission having two hydraulic units, at least two torque-transmitting mechanisms, and a planetary gear arrangement for combining the output of an engine and th... | 07/10/2007 |
| 7207916 | Transmission for power take-off A PTO transmission transmits power from an engine-driven shaft to a PTO shaft. The transmission includes a variable displacement hydraulic pump driven by the engine-driven shaft. A planetary transmission unit includes a ring gear driven by the engine-driven shaft, a... | 04/24/2007 |
| 7186203 | Planetary gear type multistage transmission for vehicle The transmission 10 is constructed so that, in the first transmission portion 36, the rotation of the input shaft 16 is outputted to the second transmission portion 38 via the first intermediate output path M1 and the second interm... | 03/06/2007 |
| 7163093 | Synchronizer for transmission A synchronizer for a transmission including: a synchronizer hub; a synchronizer sleeve slidable thereon to engage with a clutch gear, which is provided with sleeve spline teeth having sleeve chamfers; and a synchro ring having a plurality of pairs of synchro ring sp... | 01/16/2007 |
| 7097584 | Synchronization device for a dual clutch gearbox based on at least one planetary gear set, and corresponding dual clutch gearbox A dual clutch gearbox for a motor vehicle comprising a first gearbox input shaft (20) with which at least one first gear is associated, and a second gearbox input shaft (22) with which at least one second gear is associated. An outer gearbox input shaf... | 08/29/2006 |
| 7089824 | Traveling transmission apparatus for work vehicle A traveling transmission apparatus for a work vehicle is disclosed. The apparatus includes a stepless change-speed unit receiving power from an engine, a gear transmission mechanism receiving power from the stepless change-speed unit and disposed rearwardly of the e... | 08/15/2006 |
| 6997838 | Parallel hydromechanical underdrive transmission An axial piston pump and an axial piston motor, mounted in a housing each have a rotating element and a non-rotating element. Each non-rotating element is mounted for tilting movement about axes transverse to the axes of rotation of the rotating element, on trunnion... | 02/14/2006 |
| 6964310 | Multi-wheel-driving vehicle A multi-wheel-driving vehicle including at least three parallel axles each of which is provided on both ends thereof with respective drive wheels and including power dividing means for permitting the rotary speed among the axles, is improved in its effect of braking... | 11/15/2005 |
| 6909955 | Method of controlling a dual clutch transmission A method of controlling the timing of the shift events of a dual clutch transmission that includes the steps of sensing the current output speed of the transmission, determining the time required to complete each possible shift event within the transmission, and det... | 06/21/2005 |
| 6904997 | Compact vehicle transmission A compact vehicle has a frame and an operating position thereon for at least one rider. An engine having a drive shaft is on the frame, as are a plurality of operational wheels. A transmission operatively couples the engine and the wheels. The transmission is a hydr... | 06/14/2005 |
| 6821226 | Method for controlling the shifting sequence of a continuous automatic transmission, especially a motor vehicle, comprising gear step changeovers The method serves for the shift sequence control of a continuous automatic transmission, especially of a motor vehicle, having gear-stage switchover. The transmission ratio of the automatic transmission is adjustable within a set gear stage by means of an adjusting ... | 11/23/2004 |
| 6692395 | Transmisson for power take-off A PTO transmission includes a split power transmission unit having an output member connected to a PTO shaft, a first input connected to an engine output shaft and a second input connected the output of a variable speed drive unit. A control unit controls... | 02/17/2004 |
| 6595885 | Transmission control system and method A method and system for controlling a transmission in a work machine is provided. The output of a hydrostatic transmission having a source of pressurized fluid is combined with the output of a mechanical transmission having at least one engaged clutch. An... | 07/22/2003 |
| 6530855 | Parallel hydromechanical underdrive transmission A parallel hydromechanical continuously variable transmission has a housing (107) that holds a make-up pump (52), and has internal cavities for holding operating assemblies of the transmission, including an axial piston pump (50) and an axial piston motor... | 03/11/2003 |
| 6485387 | Apparatus and method for determining the output speed of a hydrostatic unit in a hydro-mechanical transmission The output speed of a hydrostatic unit in a transmission is determined using a pair of variable reluctance sensors, one on a gear driven by the hydrostatic unit output and the other on the carrier of the planetary system. One of the two sensors will alway... | 11/26/2002 |
| 6435999 | Continuously variable transmission and method of controlling the same A continuously variable hydrostatic transmission in which a fixed displacement hydraulic pump and a variable displacement hydraulic motor are disposed on a drive axle, and connected via a closed hydraulic circuit. The continuously variable hydrostatic tra... | 08/20/2002 |
| 6276134 | Apparatus for controlling a plurality of hydraulic motors and a clutch An apparatus, for controlling a plurality of hydraulic motors and a clutch for driving a drive shaft, can prevent a speed change shock and a load slip of a hydraulic motor as well as making a structure simple. The apparatus includes: a first volume variab... | 08/21/2001 |
| 6260440 | Method and apparatus for shifting ranges in a continuously variable transmission A transmission assembly having a hydrostatic transmission with a variable displacement hydraulic device which controls a motor speed ratio. The transmission assembly further includes a mechanical transmission coupled to the hydrostatic transmission and ha... | 07/17/2001 |
| 6106427 | Continuously variable transmission The invention is based on a continuously variable transmission comprising a mechanical power branch and an electronically controlled hydraulic power branch which can be adjusted via a swash plate (7), a summarizing transmission and a multi-stage transmiss... | 08/22/2000 |
| 6080074 | Process for precise adjustment of a hydrostatic and mechanical torque division gearing A hydrostatic/mechanical multiple path power transmission comprises an adjustable hydrostat unit (4), a summing planetary gearbox (10) with two input shafts (6, 8) and at least two output shafts, and a step gearbox (11) connected to the output shafts. In ... | 06/27/2000 |
| 6007444 | Hydromechanical transmission A mechanical transmission (3; MT) is interposed between an input shaft (1) and an output shaft (2), and a hydrostatic transmission (4; HST) is disposed in parallel with the MT (3). Between the input shaft (1) and the input side of the MT, a third planetar... | 12/28/1999 |
| 5980411 | Process for controlling the couplings of a hydrostatic and mechanical torque division gearing A method of changing the range of a hydrostatic/mechanical power split transmission is specified: firstly, the command to engage the clutch for the next range is given, then the transfer of the load to this clutch is carried out and then the command to di... | 11/09/1999 |
| 5684694 | System for controlling a hydrostatic-mechanical transmission when an oil pressure exceeds a relief pressure A control system designed such that if a heavy load is imposed on a vehicle during running and a hydraulic relief state in which an oil pressure in a hydraulic circuit for a hydrostatic transmission unit exceeds a relief pressure is detected, the angle of... | 11/04/1997 |
| 5682315 | Method and system for controlling a split torque transmission The present invention relates to a method and system for controlling a split torque transmission having a hydrostatic transmission and a mechanical transmission. The control system employs a transmission control and includes a transmission input speed sen... | 10/28/1997 |
| 5679085 | Vehicle propulsion unit and method for controlling same A propulsion unit, preferably a propulsion unit for a utility vehicle, as well as a method for controlling same are disclosed. The propulsion unit comprises an engine, a transmission and a power take-off unit having a power take-off shaft. A first fractio... | 10/21/1997 |
| 5671137 | Response control system for hydrostatic-mechanical transmissions A response control system for a hydrostatic-mechanical transmission. In this system, it is determined in digging/moving operation whether an actual speed ratio which is the ratio of the revolution speed of the output shaft to the revolution speed of the p... | 09/23/1997 |
| 5643121 | Continuously-variable-ratio transmissions A continuous-variable ratio transmission comprising a ratio-varying unit ("variator"), and an epicyclic unit having three outputs arranged concentrically. Two of those outputs are connected respectively in fixed ratio to opposite ends of the variator, so ... | 07/01/1997 |
| 5624339 | Method for controlling shift points in a continuously variable transmission A method is disclosed for controlling the shift points in a continuously variable transmission having a closed loop control wherein the output of the continuously variable transmission is generated by a hydrostatic transmission or by a combination of the ... | 04/29/1997 |
| 5622050 | System for controlling a hydrostatic-mechanical transmission at the time of vehicle acceleration or deceleration A target engine revolution speed is calculated based on the throttle position of an engine such that the amount of change in the target engine revolution speed with respect to time is limited. According to the target engine revolution speed thus calculate... | 04/22/1997 |
| 5618242 | Apparatus for torque-converter clutch transmission An apparatus for torque-converter clutch transmission includes a final output planetary gear, at lease a braking pump, a compound planetary gear train, an oil path system, and a centrifugal pump. The final output planetary gear includes a sun gear mounted... | 04/08/1997 |
| 5605515 | Control for a positive displacement machine of a hydrostatic/mechanical power shift gear A process and device for controlling a hydrostatic positioning mechanism (HG) of a hydrostatic/mechanical, continuous output-distributing power shift gear in which after an engagement of a clutch (K2, K3) of a new gear in a load-free synchronous condition... | 02/25/1997 |
| 5584772 | Infinitely variable hydrostatic torque-routing transmission An infinitely variable hydrostatic torque-routing transmission with at least two operating ranges shiftable via switching elements includes a first, mechanical part, including a planetary differential gear, and a second, hydrostatic part, including two ad... | 12/17/1996 |
| 5582007 | Method for smooth hydrostatic pump/motor transitions A method is disclosed for providing a smooth power transition between a variable displacement pump and a variable displacement motor when a mechanical feedback is not provided. The method includes sensing and comparing the speeds of the variable displacem... | 12/10/1996 |
| 5540051 | Control mechanism for hydrostatic-mechanical power transmission system A control mechanism for a hydrostatic-mechanical power transmission system having a mechanical transmission unit driven through an input shaft connectable to a power source, and a hydrostatic transmission unit that is connectable to the input shaft and in... | 07/30/1996 |
| 5531304 | Creep preventing control system for hydrostatic-mechanical transmissions Upon detection of execution of operation for stopping a vehicle during its running state and of a drop in an actual speed ratio below a predetermined value, the actual speed ratio being the actual ratio of the revolution speed of an output shaft to the re... | 07/02/1996 |
| 5529546 | Forward/reverse drive and stop control system for hydrostatic -mechanical transmissions A control system in which a judgment is made such that (i) a vehicle is in a forward drive control state, on condition that the forward/reverse drive lever is placed in the forward drive position and the actual speed ratio exceeds a specified small value ... | 06/25/1996 |
| 5524436 | Overrun protecting control system for hydrostatic-mechanical transmissions The maximum value of target motor speed ratio is calculated from the allowable revolution speed of a motor, and based on the maximum value, an allowable value of target speed ratio is set. Target speed ratio is then limited to the allowable value or less.... | 06/11/1996 |
