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| Number | Title | Issue Date |
| 8186473 | Hydrostatic ground drive control system for a work machine with smooth transition between speed ranges The control system allows selecting from multiple speed ranges for the ground drive of a work machine without a mechanical transmission. The system does this by controlling a variable displacement fluid pump supplying fluid to variable displacement fluid motors driv... | 05/29/2012 |
| 8146691 | Travel drive system for work vehicle, work vehicle, and travel drive method A travel drive system for a work vehicle includes: an HST drive device comprising a hydraulic pump driven by a prime mover and a hydraulic motor connected to the hydraulic pump by a closed circuit; an electric motor driven by using electric power generated by drive ... | 04/03/2012 |
| 8056670 | Pump unit and working vehicle A pump unit applied to a working vehicle includes an input shaft operatively connected to an output shaft of a driving source, first and second hydraulic pump bodies, a pump housing that accommodates the first and second hydraulic pump bodies having respective rotat... | 11/15/2011 |
| 8016069 | Control system and method for operating a hydrostatically driven vehicle A hydrostatically powered vehicle includes an engine operatively associated with a pump that supplies fluid to a propel motor. Based on various sensed and engine operating conditions, a controller determines a desired operating condition for the engine while maintai... | 09/13/2011 |
| 8002073 | Hydraulic drive working vehicle A hydraulic drive vehicle includes a bypass valve for fluidly connecting or disconnecting a pump/second-motor line and a second-motor/first-motor line, and set a capacity of a first hydraulic motor to a standard capacity which makes a peripheral speed of a first whe... | 08/23/2011 |
| 7987941 | Construction vehicle with controller for suppressing reduction of traction force under low speed traveling condition A construction vehicle includes an engine, a hydraulic pump driven by the engine, a travel hydraulic motor driven by pressure oil discharged from the hydraulic pump, travel wheels driven by the drive force of the travel hydraulic motor, and a controller. The control... | 08/02/2011 |
| 7984783 | Hydraulic hybrid vehicle with integrated hydraulic drive module and four-wheel-drive, and method of operation thereof A vehicle includes an integrated drive module coupled to an axle thereof. The module includes a hydraulic motor configured to provide motive power at an output shaft, and a differential for distributing the motive power to right and left portions of the axle. The hy... | 07/26/2011 |
| 7934578 | Hydraulic pump unit, hydraulic pump set, and working vehicle There is provided a working vehicle having first and second hydraulic pump units operatively driven by a driving source and arranged away to each other in a width direction of the vehicle. In the working vehicle, each of the first and second hydraulic pump units inc... | 05/03/2011 |
| 7849953 | Control system and method for operating a hydrostatically driven vehicle A hydrostatically powered vehicle includes an engine operatively associated with a pump that supplies fluid to a propel motor. Based on various sensed and engine operating conditions, a controller determines a desired operating condition for the engine while maintai... | 12/14/2010 |
| 7798277 | Machine retarder A system is provided for controllably absorbing energy associated with a machine. The system may include a power source configured to provide power to a hydraulic pump, wherein the hydraulic pump is configured to provide a flow of fluid to a hydraulic dissipation ci... | 09/21/2010 |
| 7559401 | Hydrostatic drive system A hydrostatic drive system has a travel drive (4) and working hydraulics (6). The working hydraulics (6) have a variable delivery pump (5) connected to the driving engine (1). The pump (5) is connected to a container (10 | 07/14/2009 |
| 7506717 | Hydraulically driven vehicle The present invention includes a hydraulic pump (11), a variable displacement hydraulic motor (5) for traveling driven by pressure oil from the hydraulic pump (11), a motor displacement control means (17, 18) for adjusting a displacement ... | 03/24/2009 |
| 7490692 | Axle driving unit for a lawn tractor An axle driving unit includes an axle, a hydraulic pump, a hydraulic motor having a motor shaft on which an output gear is provided to be drivingly connected to said axle, a center section having a pump mounting surface and a motor mounting surface onto which the hy... | 02/17/2009 |
| 7434651 | Axle driving unit for a lawn tractor An axle driving apparatus includes a housing for supporting an axle, a hydrostatic transmission including a hydraulic pump, a hydraulic motor, and a center section. The center section has a pump mounting surface and a motor mounting surface substantially perpendicul... | 10/14/2008 |
| 7431123 | Vehicle improved in steering A vehicle including an integral transaxle apparatus with axles, a driving hydrostatic transmission (HST), a steering HST, and a differential unit. Driving operating means for slanting operation of a first movable swash plate of the variable displacement driving hydr... | 10/07/2008 |
| 7431124 | Hydraulic transmission assembly The present disclosure relates to a hydraulic transmission assembly for a ground vehicle comprises a pump unit and a hydraulic motor assembly connected to the pump unit. The pump unit includes a driven shaft configured to operably connect to a motor of the ground ve... | 10/07/2008 |
| 7419025 | Hydraulic transaxle and vehicle comprising it A hydraulic transaxle comprises a transaxle casing for supporting left and right axles, a pair of hydraulic motors disposed in the transaxle casing so as to drive the respective left and right axles, hydraulic ports provided in the transaxle casing so as to fluidly ... | 09/02/2008 |
| 7416045 | Dual hydraulic machine transmission The modular transmission uses only a pair of small and light hydraulic machines of remarkably improved volumetric efficiency with pistons having body portions substantially as long as the axial length of the respective cylinders in which they reciprocate. The two hy... | 08/26/2008 |
| 7415823 | Hydraulically driven working vehicle and hydraulic transaxle In a hydraulic four-wheel drive vehicle, a rear transaxle incorporates a hydraulic motor for driving rear wheels, a front transaxle incorporates a hydraulic motor for driving front wheels, and hydraulic pressure fluid pipes interposed between the front and rear tran... | 08/26/2008 |
| 7409829 | Pump unit The present invention provides a pump unit including at least one hydraulic pump with inlet and outlet ports, a pump case for accommodating the hydraulic pump having an opening through which the hydraulic pump is insertable, and a lid, called a center section, closi... | 08/12/2008 |
| 7391129 | System and method for powering accessories in a hybrid vehicle A heavy-duty hybrid vehicle power system includes a main power unit located in an engine compartment; an electric propulsion motor; a DC bus that receives DC power from the main power unit; a vehicle accessory traditionally powered directly from an internal combusti... | 06/24/2008 |
| 7383913 | Hydraulic transaxle and vehicle comprising it A hydraulic transaxle including: a variable displacement hydraulic motor with a movable swash plate whose tilt angle defines a displacement of the hydraulic motor; a casing incorporating the hydraulic motor; and a mechanism for determining a range of the tilt angle ... | 06/10/2008 |
| 7377354 | Four wheel traction control valve system A hydrostatic propulsion system includes a hydrostatic circuit fluidly connecting left front and right front motors in parallel with an outlet of a pump, left rear and right rear motors in parallel with an inlet of the pump, left front motor and right rear motor in ... | 05/27/2008 |
| 7374010 | Transmission for a working vehicle and vehicle A transmission for a working vehicle for transmitting drive power from an engine to a driving axle that includes: a flywheel including a flywheel body operatively connected with the engine and a flywheel housing for accommodating the flywheel body; a main-speed-chan... | 05/20/2008 |
| 7367185 | Zero turn drive apparatus with power take off An embodiment of the present invention involves a zero turn drive apparatus. The zero turn drive apparatus has a housing, which has a first and a second end. The housing has a first end cap mounted on the first end of the housing, and a second end cap mounted on the... | 05/06/2008 |
| 7367371 | Inflation circuit, in particular for a tire mounted on a wheel, and corresponding wheel An automatic inflation and deflation circuit for a tube (3) is produced with a single compressed fluid supply conduit (5). The inflation results from subjecting a non-return valve (VA) in series on the conduit to excess pressure. Deflation is provided ... | 05/06/2008 |
| 7360613 | Transmission for speed changing and steering of a vehicle A transmission for speed changing and steering of a vehicle comprises a first HST and a first differential for speed changing and a second HST and a second differential for steering. The first HST is a combination of a hydraulic pump and motor. The pump is driven by... | 04/22/2008 |
| 7357214 | Four-wheel drive combine with slip control An agricultural combine has a variable displacement pump connected to four drive motors that drive four wheels. An electronic controller monitors the speed of each wheel and reduces the torque of the motor that drives the wheel when the wheel slips. The controller r... | 04/15/2008 |
| 7337869 | Hydraulic hybrid vehicle with integrated hydraulic drive module and four-wheel-drive, and method of operation thereof A vehicle includes an integrated drive module coupled to an axle thereof. The module includes a hydraulic motor configured to provide motive power at an output shaft, and a differential for distributing the motive power to right and left portions of the axle. The hy... | 03/04/2008 |
| 7337870 | Working vehicle with hydraulic continuously variable transmission A working vehicle provided with a hydraulic continuously variable transmission, has a plurality of wheels; a vehicle body supported by the plurality of wheels; a hydraulic continuously variable transmission that is supported by the vehicle body, and that has a speed... | 03/04/2008 |
| 7337611 | Working vehicle comprising a hydrostatic transmission A flywheel 2 and an HST unit 5 are accommodated in a flywheel housing 13 of a working vehicle, the HST unit 5 comprising an oil hydraulic motor 9, an oil hydraulic pump 10, an oil hydraulic circuit block 17 containing... | 03/04/2008 |
| 7334404 | Pump unit There is provided a pump unit including a housing, a first and a second pump shafts, a first and a second hydraulic pump main bodies, a first and a second trunnion type movable swash pates, and a first and a second transmission gears. The housing has an inlet port f... | 02/26/2008 |
| 7331412 | Vehicle having twin transmissions for driving respective wheels A vehicle comprises a vehicle frame, a prime mover mounted on the vehicle frame, a laterally turnable wheel disposed at one side of the vehicle frame, a pair of drive wheels disposed at the other side of the vehicle frame, a steering operation device, a traveling op... | 02/19/2008 |
| 7325636 | Front-wheel drive steering compensation method and system A method of controlling the speed of a right front wheel and a left front wheel on a work machine includes receiving a speed command based at least partially on an operator input and monitoring at least one wheel steering angle of at least one front wheel. A first f... | 02/05/2008 |
| 7316287 | Hydraulic pump unit, hydraulic pump set, and working vehicle There is provided a working vehicle having first and second hydraulic pump units operatively driven by a driving source and arranged away to each other in a width direction of the vehicle. In the working vehicle, each of the first and second hydraulic pump units inc... | 01/08/2008 |
| 7314110 | Hydraulic drive vehicle A hydraulic driving vehicle comprises front and rear transaxles incorporating respective hydraulic motors, and a pump unit separated from the front and rear transaxles. The pump unit incorporates a hydraulic pump having a pump shaft. A hydraulic circuit is formed by... | 01/01/2008 |
| 7306062 | Tractor with hydraulic speed and steering control for steering at maximum speed A tractor has hydraulically driven wheels at a cab end and castor wheels at an engine end. It can be driven cab forward in a working mode with a header on the forward end. It is rotated to engine forward in the transport position for more stable higher speed travel.... | 12/11/2007 |
| 7299891 | Hydraulic drive mechanism for mobile vehicles To make operating a hydraulic drive mechanism above its admissible maximum rotational speed without separating the mechanical connection to the drive wheel possible, the motor (1) is adjusted in displacement to almost no displacement and the pressure-medium s... | 11/27/2007 |
| 7299888 | Pump unit and working vehicle First pump shaft having an input end is on a side opposite PTO shaft in the vehicle width direction with second pump shaft in between. First and second pump shafts are supported by a pair of bearing members respectively provided at second end wall and lid member so ... | 11/27/2007 |
| 7294082 | Powertrain arrangement for a skid-steer vehicle A powertrain arrangement for selectively operating a vehicle in a skid-steer configuration is provided. The arrangement includes an engine coupled to a differential. A first torque transfer mechanism is coupled to a coupling mechanism and arranged to drive a first s... | 11/13/2007 |
