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| Number | Title | Issue Date |
| 8156738 | Hydrostatic transmission having two axial piston units The invention relates to a hydrostatic transmission having two bent axis- or swashplate-type axial piston units which are operated alternately as a pump and as a motor, with the two axial piston units being adjustable together with a pivotable dual yoke or by means ... | 04/17/2012 |
| 7926267 | Hystat transmission having pressure override control A transmission for use with a machine is disclosed. The transmission may have a pump, a motor fluidly connected to receive pressurized fluid from the pump and propel the machine, and an operator input device configured to generate a signal indicative of an operator ... | 04/19/2011 |
| 7895834 | Hydraulic stepless transmission It is an object, in a hydraulic stepless transmission, to change capacity of a hydraulic pump to thereby make output characteristic different between forward and reverse travel and obtain efficient output characteristics. In the hydraulic stepless transmission forme... | 03/01/2011 |
| 7877993 | Shift operating device for traveling vehicle The purpose of the invention is to simplify the linkage mechanism of a shift operating device and to unitize the shift operating device so as to improve the reliability of assemble accuracy. A forward traveling pedal and a rearward traveling pedal are rotatably supp... | 02/01/2011 |
| 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 |
| 7082759 | 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... | 08/01/2006 |
| 7055507 | Continuously variable drive for superchargers A drive assembly for a supercharger for an internal combustion engine provides a continuously variable drive ratio between the engine and supercharger to provide a substantially, constant drive speed to the supercharger, thereby optimizing performance. The continuou... | 06/06/2006 |
| 7036311 | Hydrostatic transmission An improved compact design for a hydrostatic transmission having a hydraulic pump and hydraulic motor mounted on a center section in a housing, wherein the pump and motor are mounted at generally right angles to one another, and the longitudinal axis of the input sh... | 05/02/2006 |
| 6942596 | Hydromechanical transmission electronic control system for high speed vehicles An electronic transmission control system that can achieve a transmission ratio based on the operator inputs and the current vehicle operating conditions. The transmission constantly connects the engine to the load, and the transmission ratio is only varied by a cha... | 09/13/2005 |
| 6852064 | Hydromechanical transmission electronic control system for high speed vehicles An electronic transmission control system that can achieve a transmission ratio based on the operator inputs and the current vehicle operating conditions. The transmission constantly connects the engine to the load, and the transmission ratio is only varied by a cha... | 02/08/2005 |
| 6752236 | Axle driving unit for a lawn tractor An axle driving unit having a housing with an axle and a hydrostatic transmission disposed therein. The hydrostatic transmission includes a center section separably attached to the housing and disposed within the housing, a hydraulic pump mounted on a pump mounting ... | 06/22/2004 |
| 6648095 | Axle driving unit for a lawn tractor An axle driving unit having a housing (21,22) for supporting a first axle (17) for mounting thereon a first driving wheel (3L), and a longer second axle (18) for mounting thereon a second driving wheel (3R). The axle driving unit is eccentrically mounted ... | 11/18/2003 |
| 6431231 | Hydraulically controlled stump grinder The stump grinder has a rotating cutting wheel that is mounted onto an arm for raising and lowering movement and is driven by a hydraulic motor. The arm is capable of being moved about a generally upright axis to control the rate of laterally feed of the ... | 08/13/2002 |
| 6390227 | Axle driving unit for a lawn tractor An axle driving unit having a housing for supporting a first axle for mounting thereon a first driving wheel, and a longer second axle for mounting thereon a second driving wheel. The axle driving unit is eccentrically mounted on a body frame in proximity... | 05/21/2002 |
| 6381529 | Control system for hydrostatic transmission A control system controls a hydrostatic transmission having an engine driven variable displacement pump coupled to a fixed displacement motor. The pump has a swashplate which is controlled by a control signal generated by the control system. The control s... | 04/30/2002 |
| 6109034 | Continuously variable hydrostatic transmission ratio controller capable of generating amplified stroking forces To control transmission ratio of a continuously variable hydrostatic transmission including an input shaft, an output shaft, a hydraulic pump unit driven by the input shaft, a grounded hydraulic motor unit, and a wedge-shaped swashplate drivingly, pivotal... | 08/29/2000 |
| 6085521 | Concentric axial piston transmission A continuously variable transmission includes a housing enclosing an axial piston pump and an axial piston motor arranged concentrically with respect to the pump. The pump and motor have cylinder blocks with axial cylinders, each receiving a piston. Pump ... | 07/11/2000 |
| 5678405 | Continuously variable hydrostatic transmission A continuously variable hydrostatic transmission includes an input shaft connected to drive a hydraulic pump unit, a grounded hydraulic motor unit, and an output shaft. A wedge-shaped swashplate is pivotally mounted to the output shaft in driving connecti... | 10/21/1997 |
| 5659485 | Discharge flow control system and method in hydraulic pump A discharge flow control system and method of a hydraulic pump driven by an engine for the minimization of the difference between a discharge mount of flow in the pump and total mount of operating oil necessary to operate each actuator in hydraulic equipm... | 08/19/1997 |
| 5655369 | Continuously variable vane-type transmission with regenerative braking A continuously variable transmission, which allows recovering braking energy from a vehicle for later use in accelerating the vehicle and/or engine starting, includes a vane type pump and stator in a case, each with flexible cam rings. The pump cam ring a... | 08/12/1997 |
| 5642617 | Continuously variable hydrostatic transmission with neutral-setting hydraulic circuit A continuously variable hydrostatic transmission includes axially aligned input and output shafts journaled by a transmission housing and respectively coupled to a prime mover and a load. The input shaft drives a hydraulic pump unit, while a hydraulic mot... | 07/01/1997 |
| 5630318 | Method of pumping with a vane-type pump having a flexible cam ring A method of pumping at a variable delivery flow rate and pressure includes rotating a pump rotor having a plurality of radially extending vanes inside a flexible cam ring with an input shaft and sweeping a swept volume within the flexible cam ring with th... | 05/20/1997 |
| 5575152 | Hydraulic machine with wedge-shaped swashplate A continuously variable transmission includes a pump driven by an input shaft against a wedge-shaped swashplate. Hydraulic fluid pressurized in the pump flows through ports in a pump cylinder block into kidney-shaped slots in the swashplate, and from ther... | 11/19/1996 |
| 5542251 | Control and regulation device for a vehicle travel drive A control and regulation device for a vehicle travel drive, which comprises two hydrostatic transmissions (3, 4) of adjustable transmission ratios, each comprising a hydraulic pump (12, 13) and a hydraulic motor (14, 15), which are in driving connection w... | 08/06/1996 |
| 5540048 | Continuously variable hydrostatic transmission including a pulse width modulation ratio controller A controller for changing the ratio of a continuously variable hydrostatic transmission, as determined by the angular position of a swashplate, including an actuator having a cylinder slidingly receiving a piston to define a pair of chambers. A pair of so... | 07/30/1996 |
| 5535589 | Ratio controller for continuously variable hydrostatic transmission A continuously variable hydrostatic transmission includes an input shaft connected to drive a hydraulic pump unit, a grounded hydraulic motor unit, and an output shaft. A wedge-shaped swashplate is pivotally mounted to the output shaft in driving connecti... | 07/16/1996 |
| 5531072 | Continuously variable hydrostatic transmission having swashplate-mounted cylinder blocks A hydrostatic transmission includes wedge-shaped swashplate operatively positioned between a hydraulic pump unit driven by an input shaft and a grounded hydraulic motor unit to accommodate pumped exchanges of hydraulic fluid between the units. The swashpl... | 07/02/1996 |
| 5524437 | Continuously variable hydrostatic transmission having ratio controller actuating components incorporated in output shaft To control the transmission ratio of a continuously variable hydrostatic transmission including an input shaft, an output shaft, an pump unit driven by the input shaft, a grounded motor unit, and an a wedge-shaped swashplate drivingly and pivotally connec... | 06/11/1996 |
| 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 |
| 5493862 | Continuously variable hydrostatic transmission A continuously variable hydrostatic transmission includes an input shaft connected to drive a hydraulic pump unit, a grounded hydraulic motor unit, and an output shaft. A wedge-shaped swashplate is pivotally mounted to the output shaft in driving connecti... | 02/27/1996 |
| 5486142 | Hydrostatic transmission including a simplified ratio controller A continuously variable hydrostatic transmission includes an input shaft connected to drive a hydraulic pump unit, a grounded hydraulic motor unit, and an output shaft. A wedge-shaped swashplate is pivotally mounted to the output shaft in driving connecti... | 01/23/1996 |
| 5447029 | Hydrostatic transmission control system Hydrostatic transmissions are useful for propelling a machine to do work and travel relative to the ground. In performing work functions and during travel it is desirable to adjust machine speed to aid in handling the machine. The subject hydrostatic tran... | 09/05/1995 |
| 5423183 | Hydraulic machine with wedge-shaped swashplate A continuously variable transmission includes a pump (258) driven by an input shaft (256) against a wedge-shaped swashplate (260). Hydraulic fluid pressurized in the pump flows through ports (402) in a pump cylinder block (422) into kidney-shaped slots (4... | 06/13/1995 |
| 5048296 | Anti-vibration apparatus in a hydraulic system for boom cylinder of working apparatus A working machine such as a hydraulic excavator is provided with a working apparatus including a boom pivotally mounted on the body of the working apparatus and a boom-cylinder hydraulic system for the working apparatus. The hydraulic system includes an a... | 09/17/1991 |
| 5018351 | Hydromechanical drive A hydromechanical drive wherein a prime mover drives an input shaft which, in turn, can drive a coaxial output shaft by way of a clutch or transmission having one or more axial piston pumps. The pressure and/or rate of fluid flow in the pump or pumps is a... | 05/28/1991 |
| 4779417 | Hydraulic pressure system A hydraulic pressure system comprising a hydraulic pump, a hydraulic motor, a pair of main hydraulic pressure lines connecting the pump and the motor so as to form a closed loop or circuit, a booster line for supplying a hydraulic pressure from a booster ... | 10/25/1988 |
| 4739618 | Hydrostatic transmission A hydraulic transmission has a pump and a hydraulic motor which are in communication with each other through a fluid passage and each of which has an eccentric or inclined movable member that is moved to vary the volume of liquid discharged by the pump or... | 04/26/1988 |
| 4546847 | Hydrostatic-transmission control system, especially for lift and other industrial vehicles A hydrostatic-transmission control system for fork-lift trucks and like industrial vehicles has at least one of variable-displacement hydrostatic motor driving wheels on opposite sides of the vehicle and supplied by a pump having a control element for var... | 10/15/1985 |
| 4493189 | Differential flow hydraulic transmission An axial piston-type transmission in which a group of axially displaced pump pistons, that move in a cylinder block rotated by an input shaft, slidably engage one surface of a swash plate that rotates an output shaft. A group of axially displaced motor pi... | 01/15/1985 |
| 4366671 | Hydrostatic transmission A hydrostatic transmission in which a hydraulic pump and motor are in a generally U-shaped arrangement with a fluid transfer manifold extending between the pump and the motor. The pump is driven on one side of the manifold by the drive motor of the vehicl... | 01/04/1983 |
