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| Number | Title | Issue Date |
| 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 |
| 7186101 | Gerotor apparatus for a quasi-isothermal Brayton cycle Engine According to one embodiment of the invention, a gerotor apparatus includes an outer gerotor having an outer gerotor chamber, an inner gerotor, at least a portion of which is disposed within the outer gerotor chamber, and a synchronizing apparatus operable to control... | 03/06/2007 |
| 7137330 | Vehicle seat adjustment with actuator isolation valves A fluid powered vehicle seat adjustment system comprising a fluid actuator a source of pressurized hydraulic fluid and a controller. The fluid actuator including first and second inlet/outlet conduits, and the controller selectively controlling and directing pressur... | 11/21/2006 |
| 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 |
| 7069728 | Multi-position BOV actuator A multi-position pressurized fluid actuator is mounted for movement in a casing. The actuator includes at least one selectively openable opening at a location corresponding to an intermediate position through which pressurized fluid can be selectively bled from the ... | 07/04/2006 |
| 7055320 | Actuator An actuator comprises a pump-driving section which is driven and rotated by a current, and a pump mechanism which is connected to the pump-driving section and which sucks/discharges a pressure oil. A cylinder mechanism, which has a piston that is displaceable in the... | 06/06/2006 |
| 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 |
| 7028469 | Leakage compensation arrangement in a control device for a fully hydraulic steering system A leakage compensation system in a control device (S) has a fully hydraulic steering system (1) with a supply connection arrangement having a high-pressure connection (P) and a low-pressure connection (T). A working connection arrangement has two working conn... | 04/18/2006 |
| 6560961 | Steering system with ability to stop steering wheel rotation A full fluid-linked steering system includes a fluid pump (11), a fluid controller (19), a steering actuator (17), an electro-hydraulic compensation valve (21), and a vehicle microprocessor (23). Downstream of the fluid pump (11) is a load sensing priorit... | 05/13/2003 |
| 6490861 | Hydraulic steering system A hydraulic steering system for a tractor is provided which can be operated in a conventional steering mode or in a fast steering mode. In conventional steering mode, a conventional steering wheel and steering motor direct pressurized oil to the steerable... | 12/10/2002 |
| 6237331 | Hydraulic steering arrangement The invention relates to a hydraulic steering arrangement (1) with a housing (4), in which an inner control slide (7) and an outer control slide (6) are arranged to be mutually rotational, forming together a variable flow path device between a supply conn... | 05/29/2001 |
| 5771692 | Hydraulic steering unit with load signal A steering system having a first auxiliary branch line (23, 24) connecting a main line (6) to a return port (12); with a load line (22) connecting the first auxiliary branch line to a load port (13) and dividing the first auxiliary branch line into first ... | 06/30/1998 |
| 5215158 | Hydraulic steering system for vehicles The steering system of a motor vehicle includes a two chamber steering motor having the application of pressurized fluid applied thereto through change over valves in one position by the way of a by pass valve and alternately in a second position by the w... | 06/01/1993 |
| 5072585 | Hydrostatic auxiliary-power steering device Hydrostatic auxiliary power steering devices transmit the steering power to the steered wheels via oil pressure. Such devices utilize a metering pump 5 and a steering valve 2 combined into a single unit. The metering pump distributes oil flow produced by ... | 12/17/1991 |
| 5056311 | Hydrostatic steering device A hydrostatic steering device is provided with a pump connected with a reservoir, a steering valve, a controlled-volume pump that is capable of being activated by a steering wheel and with a steering cylinder. The steering mechanism has a variable working... | 10/15/1991 |
| 4972916 | Vehicle steering system A vehicle steering system having more than one set of steerable wheels includes a hydrostatic steering unit connected in fluid communication with actuatable hydraulic steering motors operatively coupled with one set of wheels. The hydraulic steering motor... | 11/27/1990 |
| 4949540 | Hydraulic actuator system having non-cavitating flow equalizer A hydraulic system having multiple actuators is provided with positive pressure flow equalization for both advancing and retracting movements of the system by means of first and second flow divider elements for each actuator. The flow divider elements are... | 08/21/1990 |
| 4694912 | Controlled impact power tool An impact power tool for delicate hand working operations is provided which is especially adapted for detailed engraving, carving, and delicate stone setting applications. The power tool preferably includes a hand-held impact device, a piston received wit... | 09/22/1987 |
| 4667472 | Electric integrated actuator with variable gain hydraulic output This invention relates to integrated electro-hydraulic actuators for use aboard aircraft or elsewhere. A balanced, double-acting hydraulic ram or motor (12) is connected between a support (16) and a member to be moved relative to the support. The ram incl... | 05/26/1987 |
| 4665696 | Hydraulically operated hoist for containerized freight or the like The invention in a preferred embodiment contemplates a dual-lift hydraulic arrangement in which each of two hydraulic-lift systems employs a power integrator in the connection between a charged hydraulic accumulator and a hydraulic actuator for cable susp... | 05/19/1987 |
| 4648245 | Electro-hydraulic actuator or positioning drive for continuous control or regulation operations A piston sealed by a rolling membrane is arranged in a cylindrical housing comprising two components and this piston translates against the force of a return spring. A vibrating armature pump driven via two wires by a variable alternating voltage serves f... | 03/10/1987 |
| 4553389 | Hydrostatic auxiliary steering apparatus In a hydrostatic auxiliary power steering apparatus, a short-circuit passage of a control valve establishes a restricted flow path from a pump pressure line to a reservoir return line in the neutral position of the control valve wherein all other flow pat... | 11/19/1985 |
| 4198820 | Pumping unit for a well pump A pumping unit for a well pump has a surface main cylinder with a main piston reciprocable therein, the piston having a connection to a standard well pump. In a flow cylinder of a relatively large diameter, a flow piston reciprocates within and divides th... | 04/22/1980 |
| 3965797 | Control systems and arrangements for use in mineral mining installations In a mineral mining installation employing a series of shifting rams for advancing a scraper-chain conveyor provided with a guide for a mining machine a control system with a central control station for transmitting control signals. The control signals se... | 06/29/1976 |
