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| Number | Title | Issue Date |
| 7318386 | Power assist steering apparatus and method responsive to volume flow of fluid An apparatus and method for providing power assisted steering for a marine craft having a manually operable steering pump and a hydraulic steering actuator. A powered hydraulic pump is hydraulically connected between the manually operable pump and the actuator. Hydr... | 01/15/2008 |
| 7152401 | Hydraulic steering arrangement A hydraulic steering arrangement includes a steering valve, a steering motor, connected with a high-pressure connection and a low-pressure connection via the steering valve, and with a steering unit, connected via the steering valve with a pilot pressure valve, whos... | 12/26/2006 |
| 6935114 | System and method for starting an engine A system and method for starting an engine having a crankshaft is provided. Pressurized fluid is stored in an accumulator. A flow of pressurized fluid is released from the accumulator. The flow of pressurized fluid released from the accumulator is directed to a pump... | 08/30/2005 |
| 6561076 | Differential configuration of remote hydraulic valve flow rates for extend and retract modes of operation A method of individually adjusting auxiliary hydraulic valves for work vehicles is provided such that they provide different maximum flow rates for opposite flow directions through the valve. The valve is controlled by a flow rate control for setting a ma... | 05/13/2003 |
| 6438950 | Hydraulic steering arrangement Hydraulic steering arrangement (15) with a steering handwheel (2), which is connected with a manual. pump (3), a pump (18) supplying hydraulic fluid, a steering motor (12) and a steering valve (15) arranged between pump (18) and steering motor (12) and ha... | 08/27/2002 |
| 5857488 | Multi-mode selector valve assembly for marine steering system A hydraulic valve apparatus is for controlling pressurized fluid flow to at least a pair of coupled hydraulic actuators in response to operator signals. The valve apparatus comprises a main body having main ports communicating selectively with a fluid sup... | 01/12/1999 |
| 5179835 | Brake valve for use in load sensing hydraulic system A brake valve (45) is disclosed of the type which permits communication from a source (11) of pressurized fluid to a brake actuator (47) in response to manual movement of a valve spool (57) from a neutral position (FIG. 2) to a power brake position (FIG. ... | 01/19/1993 |
| 5146745 | Steering signal conversion manifold A manifold is disclosed for converting a manual hydraulic steering signal into a proportional electrical signal. The manifold is connectable between a hydraulic fluid supply, such a helm pump, and a hydraulic steering cylinder and includes a rotary actuat... | 09/15/1992 |
| 4914913 | Load responsive flow amplified control system for power steering Flow amplified control systems are useful in pilot operated steering systems. The load responsive flow amplified control system includes a directional control valve movable to an operating position to direct fluid from the operating fluid circuit through ... | 04/10/1990 |
| 4781262 | Vehicle steering system In a steering system in which both front and rear wheels are steerable, the rear road wheels are adapted to be turned in the direction opposite to the direction of turning of the front road wheels only when a steering wheel is turned with a torque or effo... | 11/01/1988 |
| 4573397 | Turret control system The disclosure relates to a control system for actuating a turret carrying a weapons system in an armored vehicle. An electrically actuated hydraulic system moves the weapons system in elevation and azimuth directions in driving the system toward a target... | 03/04/1986 |
| 4532764 | Reaction type hydraulic steering control unit The invention relates to a reaction hydraulic control unit for use in steering systems of the type having a differential type servomotor. In steering systems of this type having a differential piston type servomotor there exists a condition during the pis... | 08/06/1985 |
| 4505109 | Hydraulic control apparatus particularly steering apparatus The invention relates to a steering assembly having a bidirectional servomotor of the differential piston type which is connectable to steerable wheels. A directional control valve unit has a spool valve with two collars which cooperates with the housing ... | 03/19/1985 |
| 4505110 | Hydrostatic steering system The invention relates to a reaction or open center type hydraulic steering control system which is adapted for use with a bidirection differential type servomotor having a piston rod extending from only one side thereof. A loaded check valve in a selected... | 03/19/1985 |
| 4432270 | Hydrostatic control device particularly a steering device The invention relates to a steering control system for a bidirectional servomotor connectable to steerable wheels. The servomotor may be of the differential type in which a rod extending from one side of the piston thereof causes the effective areas on op... | 02/21/1984 |
| 4270349 | Distributing device of vehicle hydraulic control system The distributing device of a vehicle hydraulic control system comprises a distributor connected via hydraulic lines to a servomotor, a pump and a tank, the control member of the distributor being mechanically connected with the steering drive shaft, and f... | 06/02/1981 |
| 4184332 | Hydrostatic two-circuit steering arrangement A differential drive arrangement interconnects positive displacement pumps with a manual actuating mechanism of an auxiliary fluid power steering system for vehicles to compensate for variations in fluid outflow from the pumps pressurizing two servomotors... | 01/22/1980 |
| 4161865 | Steering control with hydraulic follow-up A steering control with a hydraulic follow-up wherein a movable valve member of a control valve is automatically brought back to a nonsteering disposition as a result of the movement of the device being steered to the desired steering position. Movement o... | 07/24/1979 |
| 4144712 | Hydraulic steering device The invention relates to a power steering system of the metering type. Units of this type most commonly utilize gerotor type gear sets for the metering operation. During emergency operation when pressurized operating fluid is not available from a pump, st... | 03/20/1979 |
| 4081961 | Articulated vehicle steering system A steering system for an articulated vehicle having a pair of double acting steering cylinders and power steering means consisting of a pump and a hydrostatic steering unit to which the steering wheel of the vehicle is interconnected. Control means are di... | 04/04/1978 |
| 4069743 | Control units for vehicle powersteering mechanisms The present invention relates to a control unit for a vehicle powersteering mechanism comprising a housing having an inlet for connection to a source of fluid under pressure, an outlet for returning hydraulic fluid under pressure to said source, a pair of... | 01/24/1978 |
| 4065921 | Hydraulic control means, particularly for vehicle steering means The invention relates to a hydraulic control unit for a servomotor of the type used for vehicle steering systems. The unit has a control circuit with a power operated pump and a hand operated metering motor and an operating circuit with a power operated p... | 01/03/1978 |
| 4028997 | Motor vehicle steering A fluid power assist type of vehicle steering system having a controlled servo motor assembly operated through a control circuit, and interconnected with the steering linkage, is provided with an auxiliary servo motor assembly through which pressure regul... | 06/14/1977 |
| 4023363 | Auxiliary power steering systems for heavy duty vehicles Dual double acting servomotors hydraulically pressurized are provided wherein the pistons have shunt valve means actuatable at limit of movement of the pistons to shunt high pressure fluid at one side of the piston to the low pressure side of the piston t... | 05/17/1977 |
| 3975907 | Hydrostatic servomechanism with artificial feedback A hydrostatic servomechanism adapted to control the direction of vehicles and self-propelled machines. The mechanism has a power circuit with at least one servopump, at least one servomotor and at least one distributor, a control circuit with a measuring ... | 08/24/1976 |
| 3971214 | Assisted hydraulic control The invention relates to an assisted hydraulic control, especially for steering all types of vehicles, and comprising a double-acting receiver or hydraulic cylinder, the piston of which forms two chambers in the cylinder, the piston rod extending into one... | 07/27/1976 |
| 3959968 | Steering valve with linear spool dampening The invention is concerned with an improvement in a fluid controller for a power steering system which includes a housing having a fluid A for connection to the discharge side of a main fluid pump, an outlet for connection to the suction side of the main ... | 06/01/1976 |
| 3938331 | Hydrostatic servomechanism with artificial feedback A hydrostatic servomechanism adapted for controlling the direction of vehicles and selfpropelled machines. The servomechanism has a power circuit including a servopump, a distributor with reset mechanism, and a servomotor and a control circuit with a meas... | 02/17/1976 |
