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| Number | Title | Issue Date |
| 7810321 | Relief pressure switching apparatus for hydraulic working machine In a relief pressure switching apparatus for hydraulic working machine for switching a relief pressure of a hydraulic actuator circuit in accordance with a specification of a compression crushing apparatus or a breaker to be installed, electromagnetically variable r... | 10/12/2010 |
| 7665298 | Low voltage hydraulic system with electronic control for moving automatic closing apparatuses The invention concerns a hydraulic system for moving automatic closing apparatuses, comprising hydraulic actuating means capable to move at least one movable member coupled to at least one closing apparatus, wherein said hydraulic actuating means is operated by at l... | 02/23/2010 |
| 7367789 | Device for maintaining a static seal of a high pressure pump A pressure enclosure includes a first component having an opening, a second component coupled to the first component in a position over the opening, a third component positioned between the first and second components and covering the opening, and a load chamber def... | 05/06/2008 |
| 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 |
| 7240487 | Throttle potentiometer adapter A throttle potentiometer adapter provides a direct connection between a pivot nut on a hand throttle linkage and the internal sleeve of a potentiometer. The potentiometer provides a voltage output to an electronic controller, the voltage output corresponding to the ... | 07/10/2007 |
| 7234300 | Fastener and valve for a hydraulic apparatus An improved diagnostic system for a hydrostatic apparatus such as a hydrostatic transmission or transaxle is disclosed. A fastener having a port formed therein is used to connect a hydraulic component such as a center section to a housing. A diagnostic system may be... | 06/26/2007 |
| 7204083 | Hydraulic actuating device for a convertible top assembly of a vehicle A hydraulic actuating device for a convertible top assembly of a motor vehicle. The actuating device comprises a hydraulic pump with an associated electric pump motor and one or more hydraulic actuators, each for driving an associated movable part of the convertible... | 04/17/2007 |
| 7133758 | Neutral start interlock A neutral start interlock for a hydrostatic drive system that uses potentiometers to electronically monitor at least the position of the hydrostatic displacement control such that the engine will not start unless such control is in the neutral position. ... | 11/07/2006 |
| 7111457 | Diagnostic system for a hydrostatic transmission or transaxle An improved diagnostic system for a hydrostatic apparatus such as a hydrostatic transmission or transaxle is disclosed. A fastener having a port formed therein is used to connect a hydraulic component such as a center section to a housing. A diagnostic system may be... | 09/26/2006 |
| 7099722 | Work machine attachment control system A control system is provided for a work machine having a plurality of removably attachable work tools. The control system has at least one operator input device that is configured to control a movement speed of the work machine. The control system also has a tool re... | 08/29/2006 |
| 7032377 | Neutral start switch A neutral start switch for preventing vehicle users from starting or activating a vehicle engine under certain circumstances and for use in connection with a control arm mechanism, which may be attached to a casing of a hydraulic pump. ... | 04/25/2006 |
| 7003949 | Integrated three function valve An integrated three function valve (ITFV) that combines the functions of a bypass valve (e.g. 183a, 185a, 161a) into a single assembly is disclosed. The ITFV allows continued operation after any two failures. With the integr... | 02/28/2006 |
| 6973779 | Hydraulic power system for agricultural implement including flow-rate indicator An agricultural-implement hydraulic circuit includes a pump supplying pressurized fluid to a first service line and a second service line via a feed line and a device for varying the flow rate of the pump. A distributor valve is disposed between the first service li... | 12/13/2005 |
| 6970793 | Apparatus and method for detecting malfunctions in high-pressure fluid pumps A fluid pump system includes a pump having a plurality of cylinders, each having an outlet port coupled to a high-pressure manifold. A pressure transducer is coupled to the manifold and configured to convert pressure levels of fluid in the manifold to a voltage sign... | 11/29/2005 |
| 6948584 | Steering device A steering system, e.g., a hydraulic rack and pinion steering system for motor vehicles, includes a steering handle for prescribing a steering intention, a pressure medium source and a control valve device for controlling a flow of pressure medium to and from a serv... | 09/27/2005 |
| 6941789 | Die cushion device After molding is started, a large reaction force is obtained by compressing the air within a lower chamber by a piston while maintained in a sealing state. At an intermediate time of the molding, a small reaction force is obtained by communicating the upper and lowe... | 09/13/2005 |
| 6928353 | System and method for providing data to a machine control system A system and method for updating parameter data available to a machine control system. A work machine having an implement attached thereto includes a machine control system for controlling the machine and the implement and for providing additional functionality, suc... | 08/09/2005 |
| 6799424 | Hydraulic circuit A hydraulic circuit comprises a first and a second merging line capable of supplying pressure oil from a third pump for a third circuit to directional control valves in a first and a second circuit, respectively, and a merging valve for selectively communicating or ... | 10/05/2004 |
| 6625980 | Overpressure control circuit for vehicle pneumatic system The invention creates a vehicle pneumatics overpressure regulating circuit 1 of a supply device of a pneumatic consumer 5 in a vehicle with an operating pressure. The overpressure circuit 1 has a compressed air source 3, which furnishes compressed air for... | 09/30/2003 |
| 6615581 | Hydraulic oil flow controller for construction machine A hydraulic oil flow controller for a construction machine comprises an operating valve 6 for supplying hydraulic oil discharged from hydraulic pimps 1 and 2 to an attachment, an attachment operating unit 11 for transmitting a pilot signal corresponding t... | 09/09/2003 |
| 6539710 | Hydrostatic steering system having improved steering sensing A hydrostatic steering system of the type including a fluid controller (21) for controlling the flow of fluid from a source (11) to a steering actuator (19) in response to movement of a steering wheel (W). The controller (21) is of the type having a fluid... | 04/01/2003 |
| 6499295 | Hydro-transformer The present invention relates to a hydro-transformer including a hydraulic machine, a switching valve and a control means. A work port of the switching valve, which may optionally be connected hydraulically with a pressure port of the switching valve or a... | 12/31/2002 |
| 6092370 | Apparatus and method for diagnosing the status of specific components in high-pressure fluid pumps A method and apparatus for diagnosing components in high-pressure pumps to indicate when a component of the pump head is malfunctioning and to identify the malfunctioning component. In one embodiment, a high-pressure pump head incorporating a diagnostic s... | 07/25/2000 |
| 5865086 | Thermo-hydro-dynamic system Description of a system of a thermodynamic steam pump for water propulsion, its heating, disinfection and sterilization, or propulsion of other liquids, characterized by use of water steam pressure as the propelling media of a liquid mass directly, withou... | 02/02/1999 |
| 5796343 | Device and method for preventing damage to goods during handling by material handling equipment An alarm device, an improved squeeze-pad hydraulic system for a squeeze truck, and a method for converting an existing squeeze-pad hydraulic system of a squeeze truck into a squeeze-pad hydraulic system that alerts the operator of the squeeze truck when d... | 08/18/1998 |
| 5787787 | Engine/pump control device for loaders An engine/pump control device for loaders is disclosed. The control device controllably distributes the output power (rotating force) of an engine to the travelling and working units of a loader in accordance with operational conditions of the loader, thu... | 08/04/1998 |
| 5692376 | Control circuit for a construction machine Each attachment for a hydraulically actuated device includes a digitally coded connector which informs a control device about its identity. The control device includes a library which relates the digitally coded identity with fluid parameters of pressure ... | 12/02/1997 |
| 5660041 | Process for adjusting the characteristics of infinitely variable transmissions of a vehicle A process for adjusting the characteristics of infinitely variable transmissions of a vehicle with two drive mechanisms including detecting the output speeds of the transmissions and comparing them by means of an operating variable to determine the gear r... | 08/26/1997 |
| 5634334 | Hydraulic device for use in a production machine In a hydraulic device at least one control valve with at least three control positions is connected with a variable capacity pump, whereby the controlling device of the variable capacity pump is connected with the supply line downstream the control valve ... | 06/03/1997 |
| 5493861 | Hydraulic system with pump and load In a hydraulic system with a pump (1) and a load (4, 104), a pressure relief valve (16) is connected to the pump pressure side (3) and open when a difference between pump pressure and maximum load pressure exceeds a predetermined pressure. Pump pressure i... | 02/27/1996 |
| 5452579 | Hydraulic system with pump and load A hydraulic system has a pump (1) with at least one load (4, 5) and accompanying bi-directional valves (8, 8a). A first comparator (A) establishes which motor line (6, 7) is carrying the higher load pressure. A second comparator (B) establishes whether th... | 09/26/1995 |
| 5287699 | Automatic vibration method and device for hydraulic drilling machine In a hydraulic drilling machine with a boom, arm and bucket as working parts, one or more of the working parts can be vibrated automatically to perform effective drilling with reduced resistance in various types of operations when the soil changes. Adequa... | 02/22/1994 |
| 5123244 | Differential pressure measuring device with position detector means A hydrostatic transmission with a pair of pump/motor connected in a closed loop state by a pair of hydrostatic circuit. The hydrostatic transmission comprises a differential pressure detecting means which detects the differential pressure between the circ... | 06/23/1992 |
| 5085468 | Vehicle storage tank headboard A vehicle headboard defining a hydraulic oil storage tank for use on a vehicle is disclosed. The vehicle headboard can include a top header, a bottom header, a plurality of spaced apart transfer tubes connected between the top and bottom headers, and moun... | 02/04/1992 |
| 5036659 | Swash plate type pump with flow path through cavity containing swash plate Overheating of hydraulic fluid in a hydraulic motor system subject to aiding loads can be avoided without paying a weight or volume penalty by providing a return port (64) adapted to be connected to the system return (22) in fluid communication with a cav... | 08/06/1991 |
| 4757684 | Fail-safe electric actuator A fail-safe electric actuator, for use with a control mechanism such as a valve, is disclosed. The actuator device eliminates the possibility of the control mechanism being locked in operative position by the interruption of electric power, by automatical... | 07/19/1988 |
| 4745743 | Hydraulic fluid supply assembly A hydraulic fluid supply assembly for an agricultural or industrial tractor or similar vehicle. The assembly includes a mounting plate which closes an aperture in a back axle casing of the vehicle and which carries a hydraulic pump, a pump feed means, and... | 05/24/1988 |
| 4698968 | Pumping unit A pumping unit particularly for pumping oil from an oil bore has an inner stationary cylinder unit and an outer cylinder unit reciprocatable relative to the inner unit by hydraulic fluid; the units are enclosed in a casing and the outer unit functions as ... | 10/13/1987 |
| 4683718 | Method and apparatus for monitoring hydro turbine plants A method and a device for monitoring hydro turbine plants. The device comprises one or several hydro turbines, at least one of them having adjustable vanes. For optimum utilization of the available amount of water, the vane angles in the turbine are autom... | 08/04/1987 |
| 4655039 | Lift system A hydraulic lifting and lowering system for battery-powered lift trucks includes an electronic control system which reduces or limits operator selected lifting commands in accordance with the current being drawn by an electric motor connected to drive a v... | 04/07/1987 |
