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| Number | Title | Issue Date |
| 8161741 | System and methods for optimizing efficiency of a hydraulically actuated system Systems and methods for efficiently operating a hydraulically actuated device/system are described herein. For example, systems and methods for efficiently operating a gas compression and expansion energy storage system are disclosed herein. Systems and methods are ... | 04/24/2012 |
| 7971434 | Device and method for continuously variable transmission of traveling vehicle A variable capacity pump and two variable capacity motors are connected in a closed circuit. First to fourth drive gears are fitted to motor shafts of the variable capacity motors via clutches. A first driven gear, which meshes with the first and third drive gears, ... | 07/05/2011 |
| 7644580 | Control coupling for changing the feeding speed of feeding members in a delimbing and cutting apparatus A control coupling of pressurized medium in a delimbing and cutting apparatus, provided for feeding members and for changing their feeding speed, said control coupling comprising at least: a first motor and a second motor that are coupled in parallel and drive a fee... | 01/12/2010 |
| 7637101 | Hydraulic power transmission device and work vehicle A hydraulic power transmission device in a work vehicle transmits motive power from two hydraulic motors disposed in parallel to each other. The hydraulic power transmission device includes: a case; a first motor shaft and a second motor shaft respectively disposed ... | 12/29/2009 |
| 7356992 | Hydrostatic multi-motor drive With a hydrostatic multi-motor drive unit with a least two hydraulic motors acting upon a common load, a solution should be created, with which a further operating range is covered by the use of several motors and at the same time a simple as possible and problem fr... | 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 |
| 7204186 | Fluid circuit for feeding primary and auxiliary users with preset priorities Fluid-dynamic circuit for supplying primary and auxiliary uses with preset priorities comprises a pressurised fluid source, at least one first use with primary priority, at least one second use with secondary priority, at least one third use with low priority; said ... | 04/17/2007 |
| 7090475 | Hydraulic control circuit for a hydraulic engine with at least two speeds A hydraulic control circuit for a radial piston engine with two speeds. The changeover between the speeds takes place through the alteration of the absorption volume, the delivery side being connected to the discharge side with a bypass connection by a valve arrange... | 08/15/2006 |
| 7083391 | Method and device for detecting the speed of a pump A method and a system for detecting the speed of a pump motor of a hydraulic pump system are provided, in which pump system a pump is driven by a pump motor to deliver hydraulic fluid into a pump reservoir. In accordance with the present invention, a pressure signal... | 08/01/2006 |
| 7044257 | Drive system of a utility vehicle A drive system for use in utility vehicles, such as agricultural forage harvesters and combines, includes a hydrostatic transmission having a pump driven by a main engine of the vehicle and having first and second motors respectively coupled to front and rear axles ... | 05/16/2006 |
| 6860104 | Automatic transmission Automatic transmission, comprising at least one primary hydraulic pump (1) arranged to be powered by a motor, said primary pump (1) being arranged to power a number of at least two secondary hydraulic pumps (21-2n) w... | 03/01/2005 |
| 6675575 | Hydrostatic drive The invention relates to a hydrostatic drive (1) with a hydraulic pump (2) and a first hydraulic engine (10) that is linked with the hydraulic pump (2) via a first working line section (4), the hydraulic engine driving a first drive train (11). The hydros... | 01/13/2004 |
| 6662557 | Hydrostatic traveling mechanism The invention relates to a hydrostatic traveling mechanism (1) which comprises a hydraulic pump (4), a first hydraulic engine (8) that is linked with the hydraulic pump (4) via a hydraulic work circuit (2) and that drives a first drive train (17). The tra... | 12/16/2003 |
| 6629411 | Dual displacement motor control A hydraulically operated fan for a cooling system in an automotive vehicle. Two hydraulic motors drive a common fan shaft. A control system provides means to bypass flow in parallel with both motors or direct flow to both or one of the motors dependent on... | 10/07/2003 |
| 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 |
| 6276134 | Apparatus for controlling a plurality of hydraulic motors and a clutch An apparatus, for controlling a plurality of hydraulic motors and a clutch for driving a drive shaft, can prevent a speed change shock and a load slip of a hydraulic motor as well as making a structure simple. The apparatus includes: a first volume variab... | 08/21/2001 |
| 6158216 | Hydraulically powered fan system for vehicles A hydraulically powered fan system for the cooling system of a vehicle. Two hydraulic motors, powered by a hydraulic pump, drive a common fan which cools a radiator. When hydraulic flow in excess of that required to power a single motor is present, a seco... | 12/12/2000 |
| 6099273 | Hydraulic motor with function selector Pressurized fluid motor comprising a casing, a cylinder block, a cam, an internal fluid distributor and a selector. The bore of the selector has four grooves. Two of them are communication grooves each connected to a main (feed or exhaust) power duct and ... | 08/08/2000 |
| 6021641 | Hydraulically powered fan system for vehicles A hydraulically powered fan system for the cooling system of a vehicle. Two hydraulic motors, powered by a hydraulic pump, drive a common fan which cools a radiator. When hydraulic flow in excess of that required to power a single motor is present, a seco... | 02/08/2000 |
| 5992145 | Method and device for preventing an interruption of tension during connection and disconnection of hydraulic motors The method for preventing the interruption of tension during connection and disconnection of a first hydraulic motor to and from the power train of vehicles, in particular loaders, consists in that during the disconnection of the first hydraulic motor the... | 11/30/1999 |
| 5584640 | Grain tank unloading auger drive means A conveying system (43) is disclosed including a vertical auger (27) which receives material from a horizontal auger (25). The vertical auger is driven by a hydraulic motor (37) and the horizontal auger is driven by a hydraulic motor (35). A pressure resp... | 12/17/1996 |
| 5435135 | Reversible pressurized fluid mechanism such as a motor or a pump and having at least two operating cylinder capacities The invention concerns a dual-capacity hydraulic motor. In accordance with the invention, the capacity selector device comprises two valves each having a body with two grooves and a sliding slide valve with only one groove. One application is to the imple... | 07/25/1995 |
| 5365829 | Transfer driver for pressing machine An apparatus for operating feed bars to move a workpiece between stages of a pressing machine includes cylinder devices. Each of the cylinder devices serves to move the feed bars linearly and each has a respective absolute encoder. The cylinder devices in... | 11/22/1994 |
| 5255590 | Control device for the load- dependent connection of a hydraulic stand by motor to a base-load motor A hydraulic base-load motor (M1) drives a load with the working pressure generated at the motor rising with the load. When the working pressure reaches an upper limit pressure, a hydraulic stand-by motor (M2) is switched on. Since the pressure drops upon ... | 10/26/1993 |
| 5199525 | Control circuit for hydrostatic all wheel drive vehicle A hydrostatic drive system having valving which disengages power to selected drive wheel motors in response to a sensed lack of traction, while the driven vehicle is in motion. The valving also allows communication of fluid between the inlet port of one d... | 04/06/1993 |
| 5012644 | Automatic speed changing apparatus An automatic speed changing apparatus, employable for a motorcar, which includes a hydraulic pump on the driving side mounted on a driving shaft, a plurality of hydraulic motors on the driven side mounted on a driven shaft, a distributor including a cylin... | 05/07/1991 |
| 4945816 | Radial piston hydraulic motor with rotary cam position encoder and valve control system A radial piston hydraulic motor includes an in-board computer which permits monitoring and control of various operating parameters. A position code disc is associated with the shaft of the motor by means of which the position of the drive cam on the shaft... | 08/07/1990 |
| 4884401 | Three position dual failure shut-off valve system A dual hydraulic motor system where motor wobblers are mechanically linked and the motor outputs are torque summed, is controlled by a three position dual valve assembly. Each valve assembly is controlled by pilot pistons that are mechanically linked to p... | 12/05/1989 |
| 4825659 | Control system for a hydraulically actuated press A hydraulic-control system for a hydraulic press utilizes a main power unit consisting of a pump and a flywheel which delivers the energy necessary for a working stroke to at least one cylinder of the press. An auxiliary power unit consisting of an electr... | 05/02/1989 |
| 4817459 | Engine starting and power generating system Operational efficiency in a combined engine starting and power generating system including an engine 110 connected to a dynamoelectric machine 142 useable as a motor or as a generator via a differential 114 and utilizing variable and fixed displacement hy... | 04/04/1989 |
| 4601169 | Check device for a redundant flight control apparatus Check device for a redundant flight control apparatus comprising at least two servo drive devices. Failure in supplying fluid and wedging of a control valve (20) can be simulated. Failure of the bypass valve (35) can be checked by reading and comparing th... | 07/22/1986 |
| 4598629 | Compact assisted steering mechanism Two pistons (5, 8) are mounted in the same casing (1) so as to slide in a sealed manner, the two pistons (5, 8) being firmly fixed to one another and having corresponding actuating chambers (21, 22; 23, 24) which are separated from one another and are sup... | 07/08/1986 |
| 4579044 | Two-speed shift valve A two-speed, pilot-operated selector valve which directs hydraulic fluid to two motor elements with a common output shaft to obtain a high-torque, low-speed mode, or to one motor element, while recirculating the second element in a loop, to obtain a low-t... | 04/01/1986 |
| 4567911 | Cartridge type directional control valve A cartridge type directional control valve assembly includes an elongated housing having a bore and a plug threaded in the outer end of the housing adjacent the bore. A changeover, spring biased piston forming a load senser or pressure sensor is provided ... | 02/04/1986 |
| 4545202 | Pressure-regulating system A system for limiting the torque of a multiple hydraulic system power drive unit wherein plural hydraulic motors are connected to a common torque-summing output device. The system has at least two separate hydraulic circuits, with there being a pressure-l... | 10/08/1985 |
| 4538505 | Extracting screw apparatus An extracting screw apparatus comprises a hydraulic control which operates during starting of the extracting screw after a period of nonuse. The hydraulic control comprises a double-acting hydraulic actuator having a piston rod connected to an intermitten... | 09/03/1985 |
| 4449364 | Sluing drive for excavator A sluing mechanism driven by one or more electric or hydraulic motors, for excavating or bulk handling machines comprises a pivotable discharger boom mounted on a rotary support or turntable, and a coaxially pivotable superstructure carrying further equip... | 05/22/1984 |
| 4142369 | Multiple speed hoisting system with pressure protection and load control A multiple speed hoisting system has a first fluid circuit, with a maximum effective cross-sectional area for hoisting heavy loads at low speed, and a second fluid circuit, with a smaller effective cross-sectional area for hoisting lighter loads at higher... | 03/06/1979 |
| 3981147 | Master cylinder assembly In a combined reservoir made of a plastic material such as nylon or polythene and master cylinder housing assembly, a bolt is screwed into coaxial openings of the housing and the reservoir to fasten each other. A metallic sleeve is secured to the opening ... | 09/21/1976 |
| 3972186 | Speed override control for hydraulic motors A hydraulic system including a source of pressurized fluid and a multi-speed motor with a directional control valve for selectively directing fluid to the motor for forward and reverse operation thereof and a speed control valve operative to control the f... | 08/03/1976 |
