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| Number | Title | Issue Date |
| 7975475 | Universal control scheme for mobile hydraulic equipment and method for achieving the same A universal control scheme for mobile hydraulic equipment has switches to activate and/or control any number of different tools or accessories that may be used to configure the equipment. Additionally, a single controller command may be reassigned from one set to an... | 07/12/2011 |
| 7788916 | Hydraulic system for utility vehicles, in particular agricultural tractors A hydraulic system for utility vehicles is disclosed for prioritized pressure medium supply to internal and external pressure medium consumers (6, 11, 12), which are fed via load sensing spool valves (20, 26), the external pressure medium consumers ( | 09/07/2010 |
| 7503172 | 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... | 03/17/2009 |
| 7310943 | Hydrostatic transmission controls with alternative operating modes A hydrostatic transmission on a tractor is operated by a microcontroller providing current commands to the hydrostatic transmission pump, and manual controls that provide signals to the microcontroller so the current commands cause the hydrostatic transmission to op... | 12/25/2007 |
| 7293494 | Expandable hydraulic valve stack A hydraulic valve stack for a work machine is disclosed. The hydraulic valve stack has a base with a first mounting surface and a second mounting surface. The base is connectable to the work machine and has at least one fluid passageway extending through the base fr... | 11/13/2007 |
| 7290390 | Travel control device for excavators A travel control device enables a crawler type hydraulic excavator to start slowly regardless of the preset speed ratio whenever the manipulation amount of a manual travel control device is small. The travel control device includes left and right travel motors respe... | 11/06/2007 |
| 7163078 | Hydrostatic drive The invention relates to a hydrostatic drive comprising at least one hydraulic pump (1) and a first and a second hydraulic motor (6, 25), which are respectively connected to said hydraulic pump (1) by means of two service lines (4, 41, 5, 5 | 01/16/2007 |
| 7093433 | Laying apparatus for cables, lines, conductors or suchlike, and relative laying method Laying apparatus and method for cables, lines, conductors or suchlike. The apparatus comprises at least a hydraulic circuit provided with a variable delivery feed pump and with a motor connected to the feed pump in order to drive laying members for the cables and su... | 08/22/2006 |
| 7069722 | Hydraulic system for a vehicle, a vehicle including such a hydraulic system and a suplementary unit for such a vehicle A hydraulic system for a vehicle has a hydraulic, load carrying assembly which has a movable structural element and a hydraulic device for actuating the structural element. The hydraulic system has a primary circuit having a servo device, a stationary hydraulic pump... | 07/04/2006 |
| 7059563 | Systems, apparatuses, and methods for moving aircraft control surfaces Aircraft control surface operating systems and apparatuses, and associated methods of use. In one embodiment, an aircraft system includes an actuator operably coupled to a control surface in one-to-one correspondence. The actuator can include at least a first fluid ... | 06/13/2006 |
| 7044259 | Hydraulic transmission for driving and steering wheels In a hydraulic transmission for driving and steering wheels of a vehicle, which has at least a first pair of laterally disposed wheels, a first hydraulic pump is operatively connected to a driving source with inlet/outlet ports respectively and fluidly connected to ... | 05/16/2006 |
| 7040445 | Hydraulic driving apparatus for a wheeled vehicle A hydraulic driving apparatus for a wheeled vehicle including a prime mover and a pair of wheels comprises a stepless transmission mechanism for traveling which transmits driving force from the prime mover to the drive wheels so as rotate the drive wheels in a commo... | 05/09/2006 |
| 6978612 | Utility device having hydraulic circuit for multi-function valve A utility vehicle or other utility device includes a hydraulic circuit that enhances operative capabilities of utility mechanisms with multiple hydraulic functionality. In some embodiments, multiple functionality can include powering of one or more hydraulic motor(s... | 12/27/2005 |
| 6904993 | Hydrostatic drive and method for operating such a hydrostatic drive A hydrostatic drive (1) with a hydraulic pump (3) and a plurality of hydraulic motors (6-9) that are hydraulically linked with the hydraulic pump (3). One speed sensor (20; 21; 22; 23) each allocated to a respective hydraulic motor... | 06/14/2005 |
| 6666023 | Fluid pressure transmitting apparatus A fluid-pressure transmitting apparatus that is capable of securing the operationality of a working machine and braking and preventing against engine stall. The apparatus can switch between a working-machine operating device and a traveling operating devi... | 12/23/2003 |
| 6644335 | Precision orificing for pilot operated control valves A fluid control system incorporates an orificing device between each of a plurality of pilot operated control valves in connection with a control device and a resolver. The pilot operated control valves are actuated by the control device to control differ... | 11/11/2003 |
| 6609368 | Automatic downshift and override control for a transmission The present invention includes a hydrostatic transmission system that has a control device that is selectable to send a speed signal to a motor for driving an output at a predetermined speed. A controller is used to automatically permit the selected speed... | 08/26/2003 |
| 6598394 | Control circuit for construction machine A control circuit for a construction machine using a control lever for revolving a boom swing in common with a traveling motor and switching pilot pressure via a switching valve has a switch for supplying a switching signal to the switching valve. A press... | 07/29/2003 |
| 6408876 | Control valve It is an object of the present invention to provide a control valve which can reduce the number of external lines connected to a hydraulic remote control valve. A control valve 1 for controlling hydraulic cylinders 2,2' is provided, in one 26 of spool cov... | 06/25/2002 |
| 6402260 | Vehicle anti-lock brake control system A rotational speed of an electric motor 12 is memorized at a memory unit 21 as a set rotational speed for allowing a minimum required volume of brake fluid to be discharged from the pumps in a state where the output hydraulic pressure of the master cylind... | 06/11/2002 |
| 6382595 | Differential hydrostatic transmission system A hydrostatic transmission system for driving a rotatable member includes a differential having an output coupled with the rotatable member, a first hydrostatic drive having an output coupled to a first input of the differential, and a second hydrostatic ... | 05/07/2002 |
| 6354081 | Attachment for skid steer loader or other commercial work vehicle having wireless hydraulic sequencing block A work attachment for a commercial work vehicle such as a skid steer loader has a unique hydraulic circuit that splits hydraulic working flow between two hydraulic functions without the need for electronic solenoids. The commercial work vehicle has hydrau... | 03/12/2002 |
| 6269637 | Hydraulic pressure control circuit for a working machine When a working implement comes close to a cab during operation, for efficiency, the operation should continue insofar as possible yet it is essential the working implement be prevented from striking the cab. To that end, a pilot pump oil line capable of s... | 08/07/2001 |
| 6176084 | Hydraulic system for propelling a vehicle A hydraulic system for propelling a vehicle, and with the system arranged with a pump and vehicle drive motors and valves and pilot lines. The operator can select an all-wheel drive or a lesser number of wheel drives. Also, there is a system automatic res... | 01/23/2001 |
| 6161586 | Tournament oil path constituting apparatus A tournament oil path constituting apparatus in which while a laminated block is constituted by laminating a number of oil path plates, a number of shuttle valve holes and connection grooves made continuous to the shuttle valve holes are formed at overlap... | 12/19/2000 |
| 6158462 | Hydraulic pressure control device The present invention is directed to a hydraulic pressure control device which can overcome problems, such as a shock to an actuator or a pressure boost phenomenon involving a rapid increase in pump delivery pressure, conventionally encountered when a dir... | 12/12/2000 |
| 6122913 | Drive for a mobile operating device A drive system for a mobile operating device. The drive system includes a drive motor driving a first variable-delivery hydraulic pump which is in fluid engagement with a first hydraulic motor, the first hydraulic motor being part of a hydraulic travellin... | 09/26/2000 |
| 6119802 | Hydraulic drive system for a vehicle A hydraulic drive system for a vehicle includes a pressurizing circuit and a working circuit. The pressurizing circuit incorporates a pump driven by a prime mover having a nominal horsepower rating. The prime mover is either shut off or idled when the pre... | 09/19/2000 |
| 6098403 | Hydraulic control valve system with pressure compensator An improved pressure-compensated hydraulic system includes a separate valve section which feeds hydraulic fluid from a variable displacement pump to one of several hydraulic actuators. Each valve section has a main valve spool and a pressure compensating ... | 08/08/2000 |
| 5957159 | Directional control valve with flow distribution valves A pair of directional control valves 8 and a pair of hold check valves 9 are disposed respectively between a pair of metering notches 6, which are formed in a land 4-1 of a spool 2 and have functions of both flow rate control and direction control, and a ... | 09/28/1999 |
| 5953977 | Simulation modeling of non-linear hydraulic actuator response In order to accomplish many tasks of a machine efficiently, a motion planning system predetermines the response of the machine to a given set of motion commands. With two or more actuators being driven by a single hydraulic pump, there may not be adequate... | 09/21/1999 |
| 5946910 | Hydraulic circuit for hydraulically driven working vehicle The present invention relates to a hydraulic circuit for a hydraulically driven working vehicle which allows the vehicle to travel at an almost constant speed during high-speed traveling, provides a great digging force during working, does not need a char... | 09/07/1999 |
| 5890362 | Hydraulic control valve system with non-shuttle pressure compensator An improved pressure-compensated hydraulic system for feeding hydraulic fluid from a variable displacement pump to multiple hydraulic actuators. A separate valve section controls the fluid flow between the pump and a different actuator. Each valve section... | 04/06/1999 |
| 5878569 | Energy conversion system The energy conversion system of the subject invention converts the energy from a source of pressurized fluid, such as a free-piston engine and a storage accumulator, to a work system at various pressure levels. This is accomplished by providing power modi... | 03/09/1999 |
| 5715865 | Pressure compensating hydraulic control valve system An improved pressure-compensated hydraulic system for feeding hydraulic fluid to one or more hydraulic actuators. A remotely located, variable displacement pump provides an output pressure equal to input pressure plus a constant margin. A pressure compens... | 02/10/1998 |
| 5692377 | Apparatus for controlling lifting operation An apparatus for controlling the lifting operation comprising an operation mode selection switch which is selectively set to an ordinary operation mode or to a lifting operation mode and a hydraulic circuit isolating means. The hydraulic circuit isolating... | 12/02/1997 |
| 5678470 | Tilt priority scheme for a control system A control system is typically used for controlling the implements of a machine. The control system includes a lift circuit and a tilt circuit. The control system includes a module which receives a signal from the lift circuit and the tilt circuit and sele... | 10/21/1997 |
| 5613361 | Hydraulic circuit for supplying a plurality of series-operated of a hydraulically controlled installation A hydraulic circuit for supplying a plurality of series-operated consumers of a hydraulically controlled installation, in particular of an injection molding machine, having a pump with feed-flow pressure control, is described. To be able to slow down grea... | 03/25/1997 |
| 5607027 | Hydraulic drive system for a vehicle A hydraulic drive system for a vehicle includes a pressurizing circuit and a working circuit that are interconnected by suitable valving. The pressurizing circuit incorporates a fixed displacement pump which is driven by a prime mover having a nominal hor... | 03/04/1997 |
| 5564274 | Cold oil protection circuit for a hydraulic system A cold fluid protection circuit is provided for controlling the rate of fluid flow in a hydraulic system in response to the temperature of the oil in a reservoir. The subject invention includes a temperature sensor operative to sense the temperature of th... | 10/15/1996 |
