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| Number | Title | Issue Date |
| 7849689 | Hydrostatic transaxle A hydrostatic transaxle is provided for a vehicle having a first axle and a second axle. The hydrostatic transaxle comprises: a hydraulic pump; a first hydraulic motor drivingly connected to the first axle; a closed circuit fluidly connecting the hydraulic pump to t... | 12/14/2010 |
| 7690198 | Integrated hystat having single input and independent output A drivetrain for use in a mobile vehicle is disclosed. The drivetrain may have a housing, a first hydraulic pump connected to the housing, and a second hydraulic pump connected to the housing. The second hydraulic pump may be in axial alignment with the first hydrau... | 04/06/2010 |
| 7594397 | Clutch mechanism of hydrostatic continuously variable transmission A clutch mechanism for a hydrostatic continuously variable transmission in which a high pressure oil path and a low pressure oil path are shortened to change-over a transmittance of power. A spring sheet is provided of which manufacturing and assembling are simple a... | 09/29/2009 |
| 7437873 | Connection block for a hydrostatic piston machine The invention relates to a connection block for a hydrostatic piston machine which is provided for simultaneous operation in a first hydraulic circuit and a second hydraulic circuit. A first working pressure duct (60) and a second working pressure duct (61... | 10/21/2008 |
| 7430863 | Pump unit and hydrostatic transmission There is provided a pump unit configured to be capable of transmitting a rotational power from a driving power source which is operatively connected thereto to an actuator through a pair of hydraulic fluid lines. The pump unit includes: an input shaft; a hydraulic p... | 10/07/2008 |
| 7430860 | Hydrostatic transmission circuit Improvement in a hydrostatic valve assembly for use in a hydrostatic transmission, for controlling fluid transfer between a first, second and third line, wherein two of the lines define first and second pressure lines within a closed loop circuit. The valve assembly... | 10/07/2008 |
| 7383683 | Zero-turn hydrostatic transaxle A hydraulic drive device including a center section for rotatably mounting a hydraulic pump and hydraulic motor on respective running surfaces. The center section further includes a pair of ports connecting the running surfaces, where the ports are not located in th... | 06/10/2008 |
| 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 |
| 7353650 | Axle driving apparatus An axle driving apparatus comprising a common housing in which a hydraulic pump and a hydraulic motor fluidly connected with each other and an axle driven by the hydraulic motor are disposed, At least one of the hydraulic pump and the hydraulic motor is variable in ... | 04/08/2008 |
| 7350355 | Hydraulic system having at least one hydraulic valve for controlling a transmission A hydraulic system having at least one hydraulic valve for controlling a transmission, in particular a continuously variable transmission. The hydraulic valve is controlled by a pilot circuit including at least one control element having a variable flow resistance a... | 04/01/2008 |
| 7340892 | Charge pump A charge pump for hydraulic drive device such as a hydrostatic transmission or integrated hydrostatic transaxle using hydraulic porting having first and second pressure sides mounted in a sump to connect a hydraulic pump and motor. The charge pump comprises a body c... | 03/11/2008 |
| 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 |
| 7299629 | Charge/auxiliary circuit for reducing power losses in hydrostatic systems A charge pump is provided with two independent outlets that can satisfy the pressure requirements of both a charge circuit and an auxiliary circuit. Preferably, the charge pump is a multiple roller vane pump that has at least one inlet and two outlets independent of... | 11/27/2007 |
| 7281375 | System and method for electronic actuation of axle driving apparatus A system and method for electronically controlling the displacement of hydraulic pumps, transmissions or transaxles. A moveable swash plate is cooperable with a rotatable hydraulic pump for controlling the output thereof, and a rotatable trunnion arm is coupled to t... | 10/16/2007 |
| 7278263 | Charge pump for a hydraulic pump A charge pump design for a hydraulic drive apparatus such as a hydrostatic transmission, integrated hydrostatic transaxle or pump having a rotatable pump cylinder block mounted in a sump and connected to a hydraulic circuit by means of a center section or the like. ... | 10/09/2007 |
| 7275372 | Hydrostatic transmission and power train for vehicle A hydrostatic transmission for vehicle interposed in a drive-power transmission path between a driving power source and a driving axle for non-stepwisely changing the speed of the vehicle includes an HST housing; a hydraulic pump unit having a pump shaft with first ... | 10/02/2007 |
| 7275371 | Bypass for a hydraulic device A bypass mechanism is provided for use in a hydrostatic transmission, to enable the user to open or close a valve between the two pressure sides of the hydraulic circuit of the transmission. An electrical mechanism is positioned to open or close the valve based on a... | 10/02/2007 |
| 7269948 | Working vehicle comprising a hydrostatic transmission A flywheel housing is partitioned by a partition wall disposed at an intermediate position in the lengthwise direction thereof to form a pair of housing portions in which a flywheel is accommodated in one housing portion, and an HST unit that receives power from the... | 09/18/2007 |
| 7269946 | HST drive circuit The present invention makes it possible, in an HST drive circuit wherein an HST pump and an HST motor have been separately stored in a pump case and a motor case, to efficiently cool the HST drive circuit. A cooling line for, while discharging a relief oil from a ch... | 09/18/2007 |
| 7264593 | Method for determining, monitoring and updating correction data for liquid-filled transmission systems Method for determining, monitoring and updating correction data for correcting measured value distortions and for calibrating liquid-filled transmission systems, via which signals from the patient detected in the body of a patient are transmitted to an external meas... | 09/04/2007 |
| 7257948 | Dual pump apparatus A dual pump apparatus having first and second pump housings is disclosed. A first end cap is mounted to the first housing to form a first sump and a first pump cylinder block is located therein. A second end cap is mounted to the second housing to form a second sump... | 08/21/2007 |
| 7252020 | Vehicle drive-train including a clutchless transmission, and method of operation A vehicle drive-train includes a drive-motor having an output shaft and a transmission having an input shaft, an output shaft, a plurality of discrete forward gear ratios and a corresponding plurality of synchronizers. Each of the synchronizers is configured to mech... | 08/07/2007 |
| 7231765 | Pump unit and hydrostatic transmission There is provided a pump unit configured to be capable of transmitting a rotational power from a driving power source which is operatively connected thereto to an actuator through a pair of hydraulic fluid lines. The pump unit includes: an input shaft; a hydraulic p... | 06/19/2007 |
| 7225617 | Bypass mechanism for a hydraulic drive apparatus A hydraulic drive apparatus having a center section located in a housing includes a hydraulic pump and motor disposed thereon and in fluid communication with a hydraulic porting system in the center section. The pump is driven by an input shaft extending out of the ... | 06/05/2007 |
| 7225704 | Transmission for a working vehicle In a transmission for a working vehicle, a working unit includes a hydraulic power unit and a valve unit enclosed in a first bulging portion of a transmission case closer to an upper side or on a top surface thereof and connected with each other along a vehicle leng... | 06/05/2007 |
| 7178336 | Pump A hydraulic pump apparatus having an internal sump formed by a housing having an internal portion and an end cap secured to the housing. A rotatable cylinder block is located in the sump and driven by an input shaft extending into the housing. The pump apparatus als... | 02/20/2007 |
| 7171809 | Working vehicle comprising a hydrostatic transmission A flywheel housing 13 is partitioned by a partition wall 14 disposed at an intermediate position in the lengthwise direction thereof to form a pair of housing portions in which a flywheel 13 is accommodated in one housing portion 13X, and... | 02/06/2007 |
| 7168245 | Work machine with supplemental power steering A steering system for a work machine having a hydrostatic transmission is disclosed. The steering system has a primary source of pressurized fluid and a steering control valve. The steering system also has a first fluid passageway fluidly connecting the primary sour... | 01/30/2007 |
| 7168247 | Charge pump A charge pump for hydraulic drive device such as a hydrostatic transmission or integrated hydrostatic transaxle using hydraulic porting having high and low pressure sides mounted in a sump to connect a hydraulic pump and motor. The charge pump comprises a body conne... | 01/30/2007 |
| 7165398 | System and method for electronic actuation of axle driving apparatus A system and method for electronically controlling the displacement of hydraulic pumps, transmissions or transaxles. A moveable swash plate is cooperable with a rotatable hydraulic pump for controlling the output thereof, and a rotatable trunnion arm is coupled to t... | 01/23/2007 |
| 7152403 | Power unit A power unit includes an engine and a static hydraulic continuously variable transmission with a swash plate type hydraulic pump and a hydraulic motor, which are connected via a hydraulic pressure closing circuit. This power unit drives the hydraulic pump to rotate ... | 12/26/2006 |
| 7137250 | 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... | 11/21/2006 |
| 7127889 | Zero turn transaxle A hydraulic drive apparatus having a pair of hydraulic pumps and a pair of hydraulic motors mounted on a common center section in a housing is disclosed. Each hydraulic motor is engaged to an adjustable swash plate located in the transmission housing for adjusting t... | 10/31/2006 |
| 7121090 | Axle driving apparatus An axle driving apparatus comprising a common housing in which a hydraulic pump and a hydraulic motor fluidly connected with each other and an axle driven by the hydraulic motor are disposed, At least one of the hydraulic pump and the hydraulic motor is variable in ... | 10/17/2006 |
| 7114332 | Clutch apparatus for a hydrostatic continuously variable transmission and transmission incorporating same A hydrostatic continuously variable transmission includes a hydraulic pump and a hydraulic motor, supported by a common support shaft, and hydraulically connectable to each other through a hydraulic circuit including an inside passage and an outside passage. A clutc... | 10/03/2006 |
| 7047839 | Power transmission arrangement of a working vehicle and transmission for the working vehicle In a transmission for a working vehicle, a PTO input shaft is located with its rotational axis extending in a vehicle lengthwise direction substantially at a widthwise center of a transmission case along a vehicle width direction. A running power input shaft is loca... | 05/23/2006 |
| 7047736 | Zero turn transaxle A transaxle comprised of a hydrostatic transmission mounted in a transmission housing and having a pair of hydraulic pumps and hydraulic motors operatively connected together through a center section mounted in the housing. First and second axle housings are mounted... | 05/23/2006 |
| 7007468 | Charge pump for a hydrostatic transmission A charge pump design for a hydraulic drive apparatus such as a hydrostatic transmission, integrated hydrostatic transaxle or pump having a rotatable pump cylinder block mounted in a sump and connected to a hydraulic circuit by means of a center section or the like. ... | 03/07/2006 |
| 7003950 | Electronic control system for a hydraulic pump A system and method for electronically controlling the displacement of hydraulic pumps, IHTs or HSTs. The IHT and HST includes a hydraulic transmission mounted within the casing that includes a rotatable hydraulic pump in fluid communication with a rotatable hydraul... | 02/28/2006 |
| 7000386 | Hydraulic intensification circuit with rotary flow devider and bypass valve A hydraulic drive circuit comprises a source of fluid flow, at least one hydraulic actuator and a rotary flow divider which operates in conjunction with valve means to provide intensified flow to the at least one hydraulic actuator. ... | 02/21/2006 |
