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| Number | Title | Issue Date |
| 8117837 | Hydrostatic transmission having integrated pressure compensated load sensing auxiliary pump A hydrostatic transmission using a hydrostatic pump, a hydrostatic motor, and a pressure compensating load sensing auxiliary pump. The hydrostatic pump is fluidly connected to the hydrostatic motor using fluid lines and a center section. The hydrostatic pump additio... | 02/21/2012 |
| 8006490 | Hydraulic control device A hydraulic control device according to the invention is of load-sensing design and serves to actuate a first hydraulic load and a second hydraulic load. Also provided are a first control valve for actuating the first hydraulic load and a second control valve for ac... | 08/30/2011 |
| 7997073 | Hydraulic control system A hydraulic control system for controlling preferably at least two consumers, has a pump supplying the consumers with a pressure medium and having an adjustable pump capacity, an adjustable metering orifice assigned to each of the consumers, a power-beyond connectio... | 08/16/2011 |
| 7984611 | Hydraulic control system A hydraulic control system for controlling preferably at least two consumers, has a pump with an adjustable delivery quantity supplying pressure fluid, an adjustable metering orifice with which the consumers are each associatable, a power beyond connection to which ... | 07/26/2011 |
| 7913490 | Hydraulic circuit for construction machine A hydraulic circuit for a construction machine is disclosed, which can prevent an energy loss of a hydraulic system by automatically reducing revolution of an engine when a working device such as a boom is not driven. The hydraulic circuit includes first to third hy... | 03/29/2011 |
| 7908853 | Hydraulic balancing for steering management A method of allocating hydraulic fluid between two or more actuators in a machine processes a first command intended to provide a first requested fluid flow to a steering actuator for steering the machine, and a second command intended to provide a second requested ... | 03/22/2011 |
| 7905089 | Actuator control system implementing adaptive flow control An actuator control system is disclosed. The actuator control system may have a pump and at least one actuator. The actuator control system may further have an actuator valve configured to control the at least one actuator. The actuator control system may also have ... | 03/15/2011 |
| 7900445 | Hydraulic supply systems Disclosed is a hydraulic system for supplying primary and auxiliary pressure medium consumers with different system pressures, which exceed the load pressure by a pre-determined control pressure differential. Primary load pressure is used to produce a first control ... | 03/08/2011 |
| 7874151 | Dual mode hydraulic circuit control and method A dual mode control system for a hydraulic circuit (200) having a variable displacement pump (216) includes at least two actuators, each controlled by a respective valve. The valves are connected in series with a pressure sensor (250) measuring ... | 01/25/2011 |
| 7870729 | Hydraulic control device The invention relates to a hydraulic control device for a priority, first hydraulic consumer and a subordinate, second hydraulic consumer, pressure medium being deliverable to the first or the second consumer via a first or a second metering diaphragm. A pressure sc... | 01/18/2011 |
| 7870728 | Hydraulic control arrangement The invention discloses a hydraulic control arrangement for controlling a number of consumers, particularly of a mobile working machine. In addition to the consumers of the control arrangement, an additional consumer should be able to be connected to a power beyond ... | 01/18/2011 |
| 7866151 | Anti-saturation valve assembly for load sensing hydraulic system An anti-saturation valve assembly (51) for use in a hydraulic system having priority (17) and auxiliary (25) load circuits, the priority circuit providing a priority load signal (19). The anti-saturation valve assembly includes a pressure... | 01/11/2011 |
| 7854115 | Post-pressure compensated hydraulic control valve with load sense pressure limiting An array of valve sections in a hydraulic system are connected to a supply line, a tank return line, and a load sense line. One valve sections includes a control valve with a metering orifice through which fluid flows from the supply line to a valve outlet. A load s... | 12/21/2010 |
| 7818966 | Hydraulic control valve system with isolated pressure compensation A hydraulic valve assembly includes a pressure compensating valve in which a compensator spool is slideably received in a bore. A pre-compensator gallery connected to a metering orifice, a preload gallery leading to a hydraulic actuator, an auxiliary pump supply pas... | 10/26/2010 |
| 7721538 | Hydraulic circuit for construction machine A hydraulic circuit for a construction machine is disclosed, which can prevent an energy loss of a hydraulic system by automatically reducing revolution of an engine when a working device such as a boom is not driven. The hydraulic circuit includes first to third hy... | 05/25/2010 |
| 7600377 | Hydrostatic drive system A hydrostatic drive system has a pump (1) and at least one consumer (5) controlled by a control valve (4) that can be actuated by control signals. A precharge device (10) that generates a precharge pressure is located in a reservoir line ... | 10/13/2009 |
| 7578127 | Flow continuity for multiple hydraulic circuits and associated method A hydraulic system comprises a plurality of primary hydraulic circuits and a secondary hydraulic circuit for satisfying flow continuity of the primary hydraulic circuits. ... | 08/25/2009 |
| 7562525 | Hydraulic system for utility vehicles, in particular agricultural tractors Disclosed is a hydraulic system for utility vehicles, in particular agricultural tractors, for supplying primary and/or auxiliary pressure medium consumers with pressure medium, comprising a pump, sucking from a pressure medium tank, the pump being controlled as a f... | 07/21/2009 |
| 7497081 | Hydraulic fluid supply structure There is provided a hydraulic fluid supply structure including: a discharge line fluidly connected to a discharge port of a hydraulic pump body and regulated to have a first pressure value; an external hydraulic fluid extraction line for supplying the hydraulic flui... | 03/03/2009 |
| 7481051 | Tree feller power management A tree felling machine has a main pump for operating functions of the machine such as the drive wheels or tracks, the steering, the brakes, and the lifting and extension of the boom, and a separate saw pump for driving the cutting element, for example, a circular di... | 01/27/2009 |
| 7481052 | Fluid circuit with multiple flows from a series valve A circuit or system having application for operating an implement or attachment for a power machine is disclosed. The circuit includes a first or primary valve, a second or auxiliary valve connected in series with the first valve and a supplemental line connected in... | 01/27/2009 |
| 7467515 | Hydrostatic drive system A hydrostatic drive system has a consumer (7), in particular a hydraulic motor, located in the open circuit. Associated with the consumer (7) is at least one pressure limiting device (11a; 11b) that can be actuated in the br... | 12/23/2008 |
| 7441404 | Configurable hydraulic control system A control system for a work machine having a plurality of removably attachable work tools is disclosed. The control system has a tool recognition device configured to generate a recognition signal corresponding to each of the removably attachable work tools, and at ... | 10/28/2008 |
| 7434393 | Control system and method for supplying pressure means to at least two hydraulic consumers Disclosed are a control arrangement and a method for the pressure medium supply of at least two hydraulic consumers that are supplied with pressure medium through the intermediary of a variable displacement pump. In the pressure medium flow path between the consumer... | 10/14/2008 |
| 7395664 | Hydraulic system for utility vehicles, in particular agricultural tractors Disclosed is a hydraulic system for utility vehicles, in particular agricultural tractors, for supplying primary and/or auxiliary pressure medium consumers (6, 11, 12) with pressure medium, comprising a pump (1), whose pressure and flow are controlled ... | 07/08/2008 |
| 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 |
| 7356991 | Hydraulic control device of an excavator with improved loading performance on a slope A hydraulic control device of an excavator is provided for controlling combined operation of boom-raising and swing on a slope. A swing priority valve (20) is provided on a pressured fluid supply line (8) that connects a first hydraulic pump (1)... | 04/15/2008 |
| 7353649 | Hydraulic pressure supply control in industrial vehicle A priority flow rate control valve (30) distributes pressurized working oil discharged from a hydraulic pump (10) driven by an electric motor (11) to a power steering device (20) first, and distributes the residual pressurized working oil... | 04/08/2008 |
| 7322800 | System and method of providing hydraulic pressure for mechanical work from an engine lubricating system The method provides hydraulic pressure for mechanical work from an engine lubricating system in an internal combustion engine by supplying oil to an engine lubrication gallery for lubricating the engine and to at least one variable oil demand accessory. Each of the ... | 01/29/2008 |
| 7320216 | Hydraulic system having pressure compensated bypass The present disclosure is directed to a hydraulic system. The system includes a first source of pressurized fluid and at least one fluid actuator. The system also includes a first valve disposed between the first source and the at least one fluid actuator being conf... | 01/22/2008 |
| 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 |
| 7316111 | Multi-purpose hydraulic system A hydraulic system including a first pump, a second pump, an auxiliary passage, and a supplemental apparatus. The first pump is in fluid communication with a first valve, and the second pump is in fluid communication with a second valve. The auxiliary passage is in ... | 01/08/2008 |
| 7305821 | Hydraulic control apparatus A hydraulic control apparatus is provided to prevent failure that can occur due to hunting, to elevate performance of a hydraulic control valve, and to improve operation efficiency by effectively conducting bleed off. The hydraulic control apparatus can include a fi... | 12/11/2007 |
| 7302797 | Hydraulic system having a post-pressure compensator A hydraulic system for a work machine is disclosed. The hydraulic system has a reservoir configured to hold a supply of fluid and a source configured to pressurize the fluid. The hydraulic system also has a fluid actuator, a first valve, and a second valve. The firs... | 12/04/2007 |
| 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 |
| 7290975 | Two-speed passenger lift and pump assembly therefor A passenger lift includes a lift platform that operates between a generally vertical stowed position in a motor vehicle, a substantially horizontal position at the height of the vehicle floor, and a position resting on the ground. The passenger lift is actuated by h... | 11/06/2007 |
| 7281903 | Device for varying the pressure of the fluid delivered by a jet washer Device for varying the delivery pressure of a jet washer comprising a positive-displacement pump operated by a single-phase electric motor powered by alternating current and having a delivery nozzle of predetermined cross-section, and electronic means for controllin... | 10/16/2007 |
| 7275369 | Hydraulic control device for controlling a boom-swing frame combined motion in an excavator A hydraulic control device includes first and second pumps, a swing control spool, a boom first-speed control spool, a boom second-speed control spool, a swing motor, a boom cylinder, a pilot control valve, and a confluence line for merging the hydraulic flow from t... | 10/02/2007 |
| 7275370 | Control arrangement and method for controlling at least two hydraulic consumers Disclosed are a control arrangement for actuation of at least two hydraulic consumers, and a method for actuation of these consumers. The latter are supplied with pressure medium through the intermediary of a pump, wherein a respective meter-in orifice and a pressur... | 10/02/2007 |
| 7275368 | Fan revolution speed control method The invention is a fan revolution control method for controlling a pump-motor system, by controlling the fan revolution speed of a cooling fan adapted to be rotated by a fan motor to cool cooling target fluids. The pump-motor system drives the fan motor by a hydraul... | 10/02/2007 |
