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| Number | Title | Issue Date |
| 8122714 | Variable hydraulic motor driving device A hydraulic motor 11 is switched to a high-speed mode when pressure oil is supplied to a pressure chamber 23 of a tilt piston 17 based on the transmission of a speed signal to a high-low speed switching valve 18, and the hydraulic motor | 02/28/2012 |
| 7913492 | Hydrostatic continuously variable transmission A hydrostatic continuously variable transmission is configured by connecting a swash plate type plunger hydraulic pump P and a swash plate type plunger hydraulic motor via a hydraulic closed circuit. A continuous shift control is executed by variably controlling an ... | 03/29/2011 |
| 7730722 | Low power HMT with by-pass valve A method of operating a vehicle with a hydrostatic circuit. The method includes providing a hydrostatic circuit having first and second hydraulic kits that are fluidly connected to one another by first and second fluid lines. A by-pass valve is placed between the fi... | 06/08/2010 |
| 7472547 | Hydraulic differential for integrated drive generator A hydraulic differential with a variable displacement hydraulic unit of the axial piston type, a fixed displacement hydraulic unit of the axial piston type, a stationary housing for mounting the hydraulic units, an input shaft for coupling to a variable speed power ... | 01/06/2009 |
| 7467516 | Axle driving apparatus An axle driving apparatus in which a hydraulic pump and a hydraulic motor which constitute a hydrostatic transmission are disposed on a center section. In a horizontal portion of the center section are provided a pair of linear oil passages in parallel to each other... | 12/23/2008 |
| 7409890 | Hydraulic motor apparatus A hydraulic motor assembly having a motor and gear reduction set mounted in a housing. The housing may be formed of separate components, including the external surface of the ring gear and the hydraulic motor port block. The motor assembly may also include pressure ... | 08/12/2008 |
| 7380399 | Static hydraulic continuously variable transmission To provide a short connection hydraulic path structure with a sufficiently large diameter to adequately lower the pressure in a high-pressure hydraulic path while the clutch is off, in a static hydraulic continuously variable transmission for sliding a clutch valve ... | 06/03/2008 |
| 7354119 | Brake system A brake system for a vehicle has a brake pedal and at least one rotational part. The brake system further includes a shaft connectable to the rotational part, and a first fluid control unit configured for being filled with fluid and actuating in response to manipula... | 04/08/2008 |
| 7331177 | Hydrostatic transmission A hydrostatic transaxle comprises: a housing, an interior space of the housing serving as a fluid sump; an axle supported by the housing; a hydrostatic transmission disposed in the housing so as to drive the axle, the hydrostatic transmission including a hydraulic p... | 02/19/2008 |
| 7316114 | Valve for a hydraulic drive apparatus An improved valve for use in a hydrostatic drive apparatus for a vehicle such as a zero turn vehicle. For each hydraulic drive system in the vehicle, a valve is located between the high and low pressure sides of the closed hydraulic circuit connecting the hydraulic ... | 01/08/2008 |
| 7305822 | Hydraulic equipment The present invention relates to hydraulic equipment comprising input shaft (2) and output shaft; first and second plungers (8, 10) and first and second spool valves (9, 11) which are moved reciprocally axially; a cylinder block (7) which... | 12/11/2007 |
| 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 |
| 7216482 | Clutch device for a hydrostatic continuously variable transmission In a hydrostatic continuously variable transmission, a hydraulic pump is linked to a hydraulic motor by a hydraulic closed circuit to change the capacity of the hydraulic motor so as to change the speed of a motorcycle continuously. A clutch device comprising a clut... | 05/15/2007 |
| 7178449 | Hydraulic device driving a rotating receiver Hydraulic device driving a rotating receiver such as a shaft (1) includes at least one hydraulic motor having axial pistons (7) bearing against a fixed swash-plate (9) via shoes (10), the pistons (7) being arranged in a rotating ba... | 02/20/2007 |
| 7174712 | Hydrostatic transmission bypass linkage Disclosed is a vehicle comprising a transaxle and a bypass mechanism. The transaxle has a plurality of mounting holes for use in attaching the transaxle to the vehicle. Further, the transaxle has at least one mounting hole more than is used to attach the transaxle t... | 02/13/2007 |
| 7171808 | Hydraulic power supply system Multiple hydraulic machines are located in a common housing. The swashplates are located in longitudinal bores and the barrels in transverse bores. Valve housings are located on either side to accommodate control valves and circuitry. The barrels are mechanically co... | 02/06/2007 |
| 7171889 | Swash plate tilting angle detector for a swash plate plunger type hydraulic unit A swash plate plunger type hydraulic motor is constituted such that plungers are slidably disposed in respective plunger holes of a motor cylinder, and a motor rolling member having a motor swash plate member is supported in a motor casing in such a manner that it c... | 02/06/2007 |
| 7155907 | Electro-hydraulic fan drive cooling and steering system for vehicle An electro-hydraulic system for operating a cooling fan and providing hydraulic fluid to a power steering system of the vehicle includes a hydraulic pump unit including first and second fixed displacement pumps and a common drive shaft for these pumps. A hydraulic f... | 01/02/2007 |
| 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 |
| 7146811 | Hydrostatic continuously variable transmission In a hydrostatic continuously variable transmission, a hydraulic pump and a hydraulic motor are connected through a hydraulic closed circuit and the capacity of the hydraulic motor is varied to vary the speed continuously. The transmission has a valve spool in a spo... | 12/12/2006 |
| 7146809 | Valve for a hydraulic drive apparatus An improved valve for use in a hydrostatic drive apparatus for a vehicle such as a zero turn vehicle. For each hydraulic drive system in the vehicle, a valve is located between the high and low pressure sides of the closed hydraulic circuit connecting the hydraulic ... | 12/12/2006 |
| 7134277 | Driving force distribution apparatus for right and left wheels A hydraulic pump of a driving force distribution apparatus for right and left axles includes a pump shaft, a swash plate supported tiltably, swash plate tilting and holding mechanism unit for tilting and holding the swash plate to one side or to the other side depen... | 11/14/2006 |
| 7121970 | Control system for a hydro-mechanical transmission A variable relief valve is inserted in a hydraulic piping for connecting a first pump/motor to a second pump/motor. The variable relief valve is controlled such that when shifting the transmission from forward to reverse or vice versa, a relief set pressure of the v... | 10/17/2006 |
| 7121092 | Bypass mechanism for a hydraulic drive device A pair of zero-turn, hydrostatic transaxles (HZTs) that may be joined to form an integrated, zero-turn, hydrostatic transaxle. Each of the hydrostatic transaxles are further comprised of a casing carrying a hydraulic pump driven by an input shaft, a hydraulic motor ... | 10/17/2006 |
| 7117672 | Hydraulic non-stage transmission A pump and motor distribution valve formed by a hydraulic closed circuit for connection between a pump and a motor. In a hydraulic non-stage transmission CVT including a swash plate plunger type hydraulic pump P and a swash plate plunger type hydraulic motor M conne... | 10/10/2006 |
| 7117671 | Hydraulic stepless transmission and power transmission A hydraulic stepless transmission comprises a first hydraulic system. Formed in a cylinder block are first and second plunger holes that contain first and second plungers, respectively, a hydraulic closed circuit that connects the first and second plunger holes, and... | 10/10/2006 |
| 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 |
| 7114333 | Axle driving apparatus An axle driving apparatus in which a hydraulic pump and a hydraulic motor which constitute a hydrostatic transmission are disposed on a center section. In a horizontal portion of the center section are provided a pair of linear oil passages in parallel to each other... | 10/03/2006 |
| 7111459 | Zero turn hydrostatic transmission bypass linkage Disclosed is a vehicle. The vehicle comprises a first hydraulic pump, a first hydraulic motor, a first axle shaft, a second hydraulic pump, a second hydraulic motor, a second axle shaft, a first bypass, a first linkage, a second bypass and a second linkage. The firs... | 09/26/2006 |
| 7093434 | Hydraulic continuously variable transmission and power transmission apparatus A hydraulic continuously variable transmission has a variable displacement type first hydraulic system having a first plunger and a plunger abutting section which actuates the first plunger, and a second hydraulic system having a second plunger and provided with an ... | 08/22/2006 |
| 7082761 | Hydraulic continuously variable transmission A hydraulic continuously variable transmission includes a swash plate plunger pump, a swash plate plunger motor, and a closed hydraulic circuit for connecting them to each other, wherein a motor pivoting member is supported by a motor casing so as to be pivotally mo... | 08/01/2006 |
| 7076948 | Hydraulic continuously variable transmission To reduce the projection of a swash plate servo mechanism in the radial direction, and to make a hydraulic continuously variable transmission compact, a swash plate plunger pump includes a pump casing provided with an input driven gear. A pump cylinder and a motor c... | 07/18/2006 |
| 7062909 | Hydraulic continuously variable transmission A hydraulic continuously variable transmission with a fixed displacement type swash plate plunger pump and a variable displacement type swash plate plunger motor are connected to each other through a closed hydraulic circuit. A motor pivot member is supported to be ... | 06/20/2006 |
| 7040092 | Center section for hydraulic transmission A two piece center section assembly for mounting inside the housing of a hydrostatic drive apparatus is disclosed. The assembly includes separate pump and motor support portions where the check valve is formed between the two pieces. Fasteners extend through the two... | 05/09/2006 |
| 7017446 | Axle driving apparatus An axle driving apparatus wherein a hydraulic motor and a hydraulic pump for a hydro-static-transmission are housed in a transmission casing of the axle driving apparatus and a center section for connecting the hydraulic motor and hydraulic pump is disposed in the t... | 03/28/2006 |
| 7017343 | Hydrostatic transmission with pressure regulation means A hydrostatic transmission comprising a housing formed with a fluid sump, a center section disposed within the fluid sump, a hydraulic pump mounted on the center section, and a hydraulic motor mounted on the center section. A fluid passage is formed in the center se... | 03/28/2006 |
| 7000387 | Hydraulic spool valve for use in a hydraulic vehicle drive A hydraulic spool valve is provided in which two inlet bores and an outlet bore lead into a housing. A spool-valve piston which is under the influence of compression springs on both sides can be displaced longitudinally in the housing. When a difference in pressure ... | 02/21/2006 |
| 7000388 | Hydraulic continuously variable transmission A hydraulic continuously variable transmission includes an axial plunger pump including a pump cylinder provided with pump plunger holes, and pump plungers fitted in the pump plunger holes. The transmission also includes an axial plunger motor including a motor cyli... | 02/21/2006 |
| 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 |
| 6996981 | Rotationally balanced hydraulic swash plate plunger unit, and hydraulic continuously variable transmission incorporating same In order to provide a rotationally balanced hydraulic swash plate plunger unit, a swash plate plunger pump casing is provided with an unbalanced flange to balance a casing which has a swash plate member therein, without requiring a separate counter weight. A hydraul... | 02/14/2006 |
