Did You Know...
...that in the early 1940s GE engineer James Wright was charged with a task of utmost importance to the war effort: develop a cheap substitute for rubber that could be used to produce tires, gas masks and a whole host of military gear. Wright tackled the task diligently -- and wound up inventing Silly Putty.
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| Number | Title | Issue Date |
| 7942231 | Hydraulic power steering system A hydraulic auxiliary power steering for motor vehicles having a source for a hydraulic medium, in particular an oil pump, which can be driven during operation by a drive device, in particular by an internal combustion engine of the vehicle or by an electric motor, ... | 05/17/2011 |
| 7913801 | Steering device for construction vehicle To provide a steering system for a construction vehicle, which is suited not only for traveling on general roadways but also for work at construction sites and can perform high-reliability steering control. A steering system for a construction vehicle is prov... | 03/29/2011 |
| 7878292 | Motorcycle steering system A steering system includes a steering unit which can be configured to convert an operation input to an input shaft into an arbitrary amount of rotation or an arbitrary turning force and output the arbitrary amount of rotation or the arbitrary turning force from an o... | 02/01/2011 |
| 7631722 | Power steering system In a power steering system, the steering state of wheels is detected based on the steering speed to judge as to whether the steering state is in turning of the steering wheel or holding of steering speed is the steering wheels. At the time of the steering operation ... | 12/15/2009 |
| 7363134 | Power steering apparatus A power steering apparatus according to the present invention is constructed to calculate a rate of change of steering speed detected by steering speed detecting means and judge whether the calculated rate of change is smaller than or equal to 0 or not, and reduce a... | 04/22/2008 |
| 7341125 | Electric power steering apparatus The invention provides an electric power steering apparatus which can improve a steering feeling. In the electric power steering apparatus, in the case that once the electric abnormality is generated in the hardware such as the motor, the torque sensor or the like a... | 03/11/2008 |
| 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 |
| 7306071 | Hydraulic steering apparatus A hydraulic steering apparatus with steering amount amplification is provided, wherein a metering device for supplying pressure medium to steering cylinders is actuated in accordance with an amount of rotation of the steering wheel. With the aid of a control block i... | 12/11/2007 |
| 7275617 | Steering control device In an electrical power steering apparatus, steering shaft reaction torque is estimated by a steering shaft reaction torque estimation unit, and a reference road reaction torque is estimated by a reference road reaction torque estimation unit. The estimated steering ... | 10/02/2007 |
| 7249608 | Flow control for power steering The flow control device comprises a supply passage (2) for supplying hydraulic fluid discharged by a pump (1) to a power steering output section (8); a variable throttle section (3) situated at an intermediate position of the supply passa... | 07/31/2007 |
| 7232007 | Method for operating a power-assisted hydraulic steering system in a motor vehicle A method of operating a power-assisted hydraulic steering system of a motor vehicle having a hydraulic pump mechanically driven by a vehicle drive assembly, and having an additional function which reduces the amount of power assistance at a high driving speed in com... | 06/19/2007 |
| 7225894 | Power steering apparatus An engine driven pump 24 is connected with a power steering motor assembly 18. An electric motor 36 drives a pump 34 connected with the power steering motor assembly 18. A control apparatus 38, 44, 52, 62 and 72 effec... | 06/05/2007 |
| 7199536 | Power steering device An electric power steering apparatus provides stable steering assist force by positively precluding actuation of an electric motor while it is rotating in a reverse direction, so as to prevent demagnetization of the electric motor. A motor reverse rotation detecting... | 04/03/2007 |
| 7174988 | Power steering system A power steering system includes a reversible-type oil pump supplying hydraulic fluid to first and second pressure chambers of a hydraulic power cylinder through first and second passages and having first and second discharge ports, and a branch passage conveying pa... | 02/13/2007 |
| 7152709 | Industrial vehicle A steering system for steering front and rear wheels of an industrial vehicle has an upper frame rotatably coupled on an upper side of a lower frame, a steering system rotating the front and rear wheels in a predetermined direction as a steering wheel is rotated, a ... | 12/26/2006 |
| 7128182 | Power steering system A power steering system includes first and second drain passages connected to the first and second passages, respectively, and first and second passage switching valves arranged at connections of the first and second drain passages and the first and second passages,... | 10/31/2006 |
| 7077215 | Trap rake steering travel limiter A sand trap rake having a frame, a pair of rear wheels supporting the frame, a single front wheel supporting the frame, and a steering system operably interconnecting the steering wheel to the single front wheel. A grading device is coupled to the frame and is raise... | 07/18/2006 |
| 7070019 | Power assisted steering for all terrain vehicle An all terrain vehicle has a frame carried by a group of wheels. At least one of the wheels is steerably connected to the frame. A steering handle assembly is rotatably connected to the frame. A servo valve has an input shaft connected to the steering handle assembl... | 07/04/2006 |
| 7044262 | Power steering system A power steering system and a method of charging the power steering system with hydraulic fluid are provided. Hydraulic fluid is selectively supplied to hydraulic chambers of a power cylinder via oil passages from a reversible pump, according to a steering torque. I... | 05/16/2006 |
| 7036625 | Integrated hydraulic control system An integrated hydraulic control system includes a steering control unit and a priority flow divider integrated into a unitary casing. An interface fluidly couples the casing for the steering control unit and priority flow divider directly to a control valve casing. ... | 05/02/2006 |
| 6988581 | Fuel efficient power steering control system and method A system and method of controlling flow outlet from a hydraulic pump. The system provides the level of flow required to execute the driver's steering commands. This method of control reduces the average torque requirement of the hydraulic pump thereby improving fuel... | 01/24/2006 |
| 6953102 | Power steering system A power steering system includes: a first drain passage for draining an oil pressure from a first oil passage, a second drain passage for draining the oil pressure from a second oil passage, and a pair of a first and second switch valves. When one of the first oil p... | 10/11/2005 |
| 6941207 | Steering angular velocity detecting device Operates steering angular velocity in first steering angular velocity calculating unit and second steering angular velocity calculating unit, by using steering angle signal from steering angle generating unit, and outputs steering angular velocity by switching them ... | 09/06/2005 |
| 6929088 | Power steering system A power steering system includes a rotary slide valve which has a housing, an input shaft and an output shaft which can be rotated relative to each other to a limited extent. A centering piston is provided which is non-rotatably and axially movably connected with th... | 08/16/2005 |
| 6904998 | Device and method to ensure the steerability of an industrial truck The invention relates to a device and a method to ensure the steerability of an industrial truck that has a hydraulic steering system. The invention includes at least one gas generation cartridge (8) and a device (16) to activate the generation of the ... | 06/14/2005 |
| 6890123 | Device for forming tight radius curbs and gutters with a paving machine A system and method to allow a paving machine to form tight radii in continuous extrusions such as curbs and gutters is disclosed. A shift cylinder is used with the steering mechanism of a typical paving machine to allow sharp radius turns. The steering cylinder is ... | 05/10/2005 |
| 6889634 | Method of providing hydraulic pressure for mechanical work from an engine lubricating system A method of providing 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 at least one variable oil demand accessory. Each of the v... | 05/10/2005 |
| 6886657 | Power steering system A power steering system for a vehicle, comprises a steering shaft connected to a steering mechanism. A hydraulic power cylinder is provided for assisting a steering effort of the steering mechanism. A reversible pump is provided having first and second discharge por... | 05/03/2005 |
| 6880668 | Power steering device A first fluid passage extends from a first outlet/inlet port of a hydraulic pump to a first work chamber of a power cylinder, and a second fluid passage extends from a second outlet/inlet port of the pump to a second work chamber of the power cylinder. A switch syst... | 04/19/2005 |
| 6851507 | Power steering system A power steering system includes: a first drain passage for draining an oil pressure from a first oil passage, a second drain passage for draining the oil pressure from a second oil passage, and a pair of a first and second switch valves. When one of the first oil p... | 02/08/2005 |
| 6820714 | Hydraulically supported steering system The invention relates to a hydraulically supported steering system with a steering gear, which is driven by a hydraulic piston/cylinder unit. The steering system includes a piston. The piston is axially displaced in a cylinder and divides the cylinder into two cylin... | 11/23/2004 |
| 6668966 | Power steering device To provide a power steering device capable of increasing the degree of freedom in the layout of the various elements, stabilizing the surface of the oil and preventing air from being included or mixing foreign materials with the oil in the oil tank. The p... | 12/30/2003 |
| 6655492 | Steering system and method for steering a vehicle A steering system and a method for steering a vehicle, that has a wheel steering and an articulated steering. The steering system (1) has a steering unit (2), a first steering motor arrangement (7), which acts upon steered wheels, a second steering motor ... | 12/02/2003 |
| 6595314 | Hydraulic steering system, for an articulated vehicle with wheel steering A hydraulic steering system (1) for a vehicle with two steering motor arrangements, particularly an articulated vehicle with wheel steering, with a hydraulic steering unit (2) having a measuring motor section (22, 23), with a selection valve (6), which co... | 07/22/2003 |
| 6581717 | Hydraulic steering arrangement A hydraulic steering arrangement with a steering handwheel which is connected with a hydraulic steering unit, and with a steering motor connected with a pump via a steering valve. In a steering arrangement of this kind, a simple construction is desired, t... | 06/24/2003 |
| 6568500 | Steering system shudder control A hydraulic power steering system includes a steering gear having a cylinder, and a piston slidably disposed in the cylinder to divide the cylinder into first and second cavities on opposed sides of the piston. A pair of turn tubes are coupled to the cyli... | 05/27/2003 |
| 6568499 | Power steering system for vehicles A power steering system is provided which comprises a bypass conduit connecting between first and second communication conduits and having bypass conduit ports. A pair of valves disposed in the bypass conduit for selectively opening and closing the bypass... | 05/27/2003 |
| 6550566 | Phase maintaining control for a hydraulic steering system A dual counterbalance valve is added in the hydraulic lines between the steering unit and the steering cylinders on an implement to maintain pressure in the steering lines by metering hydraulic fluid to and from the cylinders under pressure so that the st... | 04/22/2003 |
| 6520278 | Hydraulic power steering device A hydraulic power steering apparatus 1 which is arranged so that a damper valve 10 is disposed in hydraulic oil circuits 8 and 9 for connecting an oil passage selector valve 11 in a gear box with right and left oil chambers of a power cylinder 6. The damp... | 02/18/2003 |
| 6513618 | Power steering system A power steering system for a motor vehicle comprising a hydraulic reaction device (11) by which reaction power is generated on the steering column of the vehicle, depending on the speed thereof. According to the invention, a accumulator (14) is provided ... | 02/04/2003 |
