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| Number | Title | Issue Date |
| 8136353 | Method and apparatus for automatic pump shutoff A method of detecting a fluid leak in a hydraulic fluid circuit includes preventing fluid from entering the circuit when an actual outlet flow rate from a pump is positive while a requested outlet flow rate to a hydraulic machine is zero. An outlet port of a variabl... | 03/20/2012 |
| 7814749 | Method and apparatus for controlling a hydraulic system of a work machine A method for controlling a hydraulic system includes receiving an operator command signal via an operator command input device; receiving a throttle position signal from a throttle; retrieving from a memory a first predetermined correlation between the operator comm... | 10/19/2010 |
| 7631494 | Hydrostatic transmission of a hydrostatic-mechanical power distribution transmission A hydrostatic transmission of a hydrostatic-mechanical power distribution transmission in which the high-pressure limiting valves in the hydrostatic transmission are eliminated or adjusted to enable a working pressure higher than the working pressure on which the ma... | 12/15/2009 |
| 7614223 | Method for operating a multiple speed hydraulic motor A method of operating a hydraulic motor. In one embodiment, the method includes measuring a temperature of hydraulic fluid associated with the hydraulic motor and comparing the measured temperature of the hydraulic fluid to a first temperature threshold. The method ... | 11/10/2009 |
| 7380398 | Hydraulic metering mode transitioning technique for a velocity based control system The flow of fluid to a hydraulic actuator is controlled by a valve assembly which operates in different metering modes at various points in time for energy conservation. The metering mode to use is selected in response to the hydraulic load acting on the hydraulic a... | 06/03/2008 |
| 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 |
| 7325570 | Method and apparatus for noise suppression in a fluid line An energy attenuation method and apparatus for a system conveying liquid under pressure. The apparatus is disposed in a liquid conveying structure of the system and includes first and second outer hose conduits, each of which respectively defines an associated first... | 02/05/2008 |
| 7318292 | Method and device for attenuating the motion of hydraulic cylinders of mobile work machinery The present invention relates to a method for attenuating the motion of hydraulic cylinders of mobile work machinery, in particular of hydraulic excavators, in which prior to the hydraulic cylinder reaching one of the limits of travel, its motion speed is reduced, a... | 01/15/2008 |
| 7316110 | Hydraulic system for an air cart A hydraulic system is provided for an air cart towed by a tow vehicle across a field. The hydraulic system includes a first selector valve configured to selectively communicate a first flow rate regulated by a first control valve to drive a hydraulic-driven auger me... | 01/08/2008 |
| 7302966 | Flow control valve and method A flow control valve includes a body having a fluid passageway therethrough and first and second openings each adapted for receiving or discharging fluid from the passageway. A piston is slidably disposed in the passageway between the first and second openings of th... | 12/04/2007 |
| 7296404 | Apparatus for controlling deceleration of hydraulically powered equipment A machine member driven by a hydraulic actuator may oscillate, or wag, when the hydraulic actuator decelerates or stops. The degree of oscillation is a function of the machine member's ability to track a deceleration command, which ability varies with changes in the... | 11/20/2007 |
| 7291093 | Power output apparatus, control system for power output apparatus, and control method of power output apparatus In a motor vehicle having a planetary gear mechanism linked to an engine, a first motor, and a drive shaft and having a second motor attached to the drive shaft via a transmission, in a Lo gear position of the transmission, the control procedure of the invention dri... | 11/06/2007 |
| 7281376 | Hydraulic hybrid powertrain system A hydraulic hybrid powertrain system includes a power plant generating a high pressure fluid at an output, at least one drive motor responsive to the high pressure fluid for generating rotary motion at an output, and a mode selection device connected to the power pl... | 10/16/2007 |
| 7273125 | Variable resolution control system The present disclosure is directed to a control system for a power machine that provides selected resolution of the adjusted speed control and other controls, such as attachment controls, to provide more options to the operator for fine positioning. The present disc... | 09/25/2007 |
| 7270174 | Method, system and program product for automatically checking coolant loops of a cooling system for a computing environment Method, system and program product are provided for facilitating operation of a cooling system designed to provide system coolant to one or more electronics subsystems of a computing environment. The technique includes automatically checking at least one coolant loo... | 09/18/2007 |
| 7269943 | Apparatus and method for controlling work tool vibration An apparatus and method for controlling a work tool on a work machine are provided. The work machine may have first and second actuators, each actuator being operable in a vibratory mode and a non-vibratory mode, and each actuator being coupled to the work tool for ... | 09/18/2007 |
| 7249613 | Energy attenuation device An energy attenuation device for a conduit that is adapted to convey a pressurized fluid therethrough, comprising a hose section disposed about a portion of the conduit, wherein such conduit portion is provided with at least one aperture, for example in a surface th... | 07/31/2007 |
| 7243592 | Draining of oil leak in a hydraulic cylinder A device for a single-acting hydraulic cylinder (1) designed to lift or pull a load upon the existence of an oil pressure on the rod-side of a cylinder piston (7), where the cylinder bottom (15) of the hydraulic cylinder (1) is provided w... | 07/17/2007 |
| 7239035 | System and method for integrating wind and hydroelectric generation and pumped hydro energy storage systems An integrated, wind-pumped hydro power generation system includes at least one wind turbine generator device configured to generate output power for a common bus, and at least one hydro generator device configured to generate output power for the common bus. The hyd... | 07/03/2007 |
| 7234922 | Pump pressure limiting engine speed control and related engine and sprinkler system A sprinkler system for building includes an internal combustion engine which operates a water pump. The water pump in turn forces water through pipes to sprinkler heads. The engine is at least in part controlled by a throttle control mechanism which is responsive to... | 06/26/2007 |
| 7225616 | Stopping apparatus and method for oil pump In stopping apparatus and method for an oil pump, which are applied to a hydraulic actuator that works based on a hydraulic pressure derived from the oil pump driven by a motor, a backward rotation of the oil pump is prevented by resisting a remaining pressure that ... | 06/05/2007 |
| 7213672 | Vehicle hydrostatic transmission circuit A hydrostatic transmission circuit for a vehicle having at least two displacement members (12) driven by at least one hydraulic motor (10) having a feed main duct and a discharge main duct (16, 18). Skid control means for controlling skidding of... | 05/08/2007 |
| 7185939 | Hydraulic drive system for vehicle roofs The invention relates to a hydraulic drive system used for the covers of vehicle openings, in particular for vehicle roofs with a construction that can be opened. In said system, the actuator that is designed to displace the cover is supplied with a bulk current, wh... | 03/06/2007 |
| 7147078 | Charging a fluid accumulator while operating a hybrid vehicle powertrain including an engine and a pump/motor A system for replenishing a source of pressurized fluid for use in driving the wheels of a motor vehicle includes an accumulator containing fluid at relatively high pressure; a reservoir containing fluid at lower pressure; an engine driveably connected to the wheels... | 12/12/2006 |
| 7142967 | Features of main control computer for a power machine The present invention is directed to a computer based control system for controlling hydraulic and electromechanical actuators on a power machine, such as a skid steer loader. The computer based control system is configured to implement a number of features to enhan... | 11/28/2006 |
| 7134378 | Continuously variable transmission In a continuously variable transmission with a toroidal variable speed drive, in which a roller is supported pivotably between two toroidal disks for transmitting motion between the two toroidal disks at transmission ratios which depend on the pivot position of the ... | 11/14/2006 |
| 7130721 | Electrohydraulic control system Consistent with an aspect of the disclosure, a method for controlling a hydraulic cylinder is provided. The hydraulic cylinder is provided with a chamber and configured to receive fluid from a valve. The method includes receiving a user input and determining a desir... | 10/31/2006 |
| 7117952 | Automated attachment vibration system One embodiment of the present invention pertains to a system, including a mechanical arm, an attachment member, an actuator, a power system, an electronic control, and an operator interface. The attachment member is tiltably mounted on the mechanical arm about a piv... | 10/10/2006 |
| 7111625 | Demand valves for breathing apparatus There is described a demand valve for a breathing apparatus with a “first breath” mechanism, wherein a demand valve is held closed by resiliently latching an operating diaphragm of the valve in a position wherein the valve is closed. The diaphragm is resiliently... | 09/26/2006 |
| 7111704 | Hydrostatic drive apparatus for a road vehicle A road vehicle utilizes hydraulic machines for primary and accessory vehicle drive functions. An internal combustion engine directly drives a first variable capacity hydraulic machine selectively operable as pump or motor, an electric machine electrically coupled to... | 09/26/2006 |
| 7096093 | Intelligent valve flow linearization A feed-forward flow controller is designed to calculate a target valve position from a target flow. Correction is made for liquid or gas pressure drop across the valve and for the valve flow modulating member geometry. This feed-forward action may also be used to li... | 08/22/2006 |
| 7075189 | Offshore wind turbine with multiple wind rotors and floating system A wind energy conversion system optimized for offshore application. Each wind turbine includes a semi-submersible hull with ballast weight that is moveable to increase the system's stability. Each wind turbine has an array of rotors distributed on a tower to distrib... | 07/11/2006 |
| 7067935 | Method for regulating the level of a dam installation and dam installation implementing the method Method of regulating a water level of a dam installation having a plurality of turbine generator units arranged to generate electrical power, wherein at least some of the plurality of turbine generator units are arranged at least one of one above another and one bes... | 06/27/2006 |
| 7043975 | Hydraulic system health indicator A method and apparatus for determining the operating health of a hydraulic system are provided. The method may include the steps of determining a plurality of operating parameters of the hydraulic system during operation of the hydraulic system, determining an estim... | 05/16/2006 |
| 7039516 | Belt type continuously variable transmission A belt type continuously variable transmission includes a primary pulley (11), a secondary pulley (12), a belt (13) wound around the primary pulley and secondary pulley; a sensor (27, 21) for detecting a vehicle running state; and a contr... | 05/02/2006 |
| 7036530 | Energy attenuation device for a fluid-conveying line and method of attenuating energy in such a line An energy attenuation device for a fluid-conveying line, and a method for attenuating energy in such a line, are provided. The device includes one or more hose sections disposed in the fluid-conveying line, and at least one spring disposed in at least a portion of e... | 05/02/2006 |
| 7037430 | System and method for desalination of brackish water from an underground water supply A system and method of desalinating brackish water from an inland, underground water supply is disclosed. The system includes a source of underground water, at least one distillation and/or non-distillation desalination stage, and a source of waste heat from a power... | 05/02/2006 |
| 7017610 | Damper for hydraulic systems Disclosed is a damping device to be incorporated into fluid systems, particularly hydraulic systems, said damping device comprising an expansion hose. An essentially rigid damper which is oriented counter to the direction of flow, is disposed inside the internal spa... | 03/28/2006 |
| 7017460 | Method and arrangement for adjusting feed rate of a crosscut saw A method and arrangement for adjusting a feed rate of a crosscut saw (1), in particular, in a harvesting head of a forest machine during the crosscutting of wood (9) in the apparatus. A feed force (F) of the crosscut saw and/or a rotating rate (vc... | 03/28/2006 |
| 6975930 | Rate limiting control system A method of controlling an operation of a mechanism is provided. A first rate limit is assigned to a first input device that is operable to generate a first signal to control the operation of the mechanism. A second rate limit is assigned to a second input device th... | 12/13/2005 |
