| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 180408000 | Each wheel steerable | 16 |
| 20080302593 | VEHICLE WITH COORDINATED ACKERMAN AND DIFFERENTIAL STEERING - The invention relates to a vehicle with coordinated steering. There is a need for a vehicle wherein Ackerman steered front wheels are coordinated with differentially steered and driven rear wheels. Such a vehicle includes Ackerman steerable front wheels and differentially driven left and right rear wheels. A steered wheel angle sensor is coupled to the front wheels and generates a steered wheel angle value. A front steering unit steers the front wheels and a differential drive unit drives the rear wheels. A control unit is coupled to the steering input sensor, to the steered wheel angle sensor, and to the front steering unit and the differential drive unit. The control unit generates the front steering control signal and the rear drive/steering control signal, and coordinates the steering operation of the front wheels with the differential steering/driving of the rear wheels. | 12-11-2008 |
| 20090194359 | DEVICE FOR ORIENTATING REAR WHEELS - A device for orientating rear wheels of a vehicle, including: a rear axle fitted with two orientable wheels; an actuator including: a body with a lubricated guide bearing and an actuating member that can move relative to the body, guided by the bearing, and the movements of which orientate the wheels about the vertical of the rear axle; a temperature sensor; and a control circuit for the actuator, configured to lock movements of the actuating member when the temperature determined by the temperature sensor is below a predetermined threshold value. | 08-06-2009 |
| 20130098703 | Motorized three-wheeled vehicle rear steering mechanism - A system that steers the rear wheels of the three wheeled vehicle in coordination with the operator turning the front wheel that improves handling, performance and safety. The rear wheels are steered by a rear end mounted powered steering rack that is controlled by a steering control computer that receives input from a variety of sensors including a sensor for vehicle speed and a sensor in the steering neck that measures the angular rotation of the handlebars as they are turned by the operator. Based on these inputs, using proprietary programming the steering control computer calculates the rate, timing and direction to turn the rear wheels. Rear steering offers advantages over front wheel only steering including being easier for the operator to turn the vehicle, a smaller turning radius, better straight line stability, better high speed handling, improved corning performance, improved steering response and improved safety. | 04-25-2013 |
| 180409000 | Occupant steered | 1 |
| 180410000 | With condition modulated steering | 1 |
| 20090145684 | Safety apparatus for rear steerable vehicle wheels - A steering apparatus ( | 06-11-2009 |
| 180411000 | Independently controlled steerable wheels | 1 |
| 20100051375 | Method and apparatus for rear wheel steering control - An apparatus ( | 03-04-2010 |
| 180412000 | With electric power assist | 3 |
| 20090057050 | STEERING APPARATUS - A steering apparatus includes an axle housing rotatably supporting a wheel hub on which a steered road wheel is installed, and a lower suspension-system control arm adapted to be oscillatingly supported at one end on a vehicle body and having a turning portion provided at the other end for pivotably supporting the axle housing by the turning portion. An electric motor is installed on the lower arm for turning the axle housing by a driving force produced by the motor. A rotation axis of the motor and a pivot of the axle housing are arranged to be offset from each other. | 03-05-2009 |
| 20090095562 | STEERING CONTROL DEVICE FOR VEHICLE - A steering control device for a vehicle includes a first adjustment value determination means for determining a first adjustment value of a value corresponding to a wheel steering angle based on an actual value and a target value of turning state quantity, the first adjustment value is a value directing to approximate the actual value to the target value, and a steering control means for adjusting the wheel steering angle by modifying the value corresponding to the wheel steering angle based on the first adjustment value, wherein the first adjustment value determination means includes an index value obtaining means for obtaining an index value indicating a probability of an occurrence of a side-slip of a wheel and a regulation means for regulating the first adjustment value so that the greater the probability of the occurrence of the side-slip is, the smaller the first adjustment value is set to be. | 04-16-2009 |
| 180413000 | With electric power assist to all wheels | 1 |
| 20160089283 | Patient Support Apparatus - Patient support apparatuses—such as beds, cots, stretchers, or the like—include a plurality of user controls that allow a caregiver to control the steering and/or driving of one or more wheels from multiple different locations around the patient support apparatus (e.g. head end, foot end, and/or the sides). The control is carried out by force sensors that detect both an orientation of the applied forces and a magnitude of the applied forces. Translational and/or rotational movement is effectuated, depending upon the magnitude and direction of the forces, as well as the physical location of the applied force relative to a reference point on the support apparatus, such as the center. One or more object sensors may also be included in the support apparatus to assist in steering and/or navigating. | 03-31-2016 |
| 180414000 | With fluid power assist | 8 |
| 20090045004 | Steering group of the wheels of an axle of a vehicle - A steering group ( | 02-19-2009 |
| 20110147110 | ALL-WHEEL STEERING SYSTEM AND VEHICLE INCORPORATING THE SAME - An all-wheel steering system and vehicle, e.g., riding lawn mower, incorporating the same. The system may include a linkage system that operatively connects the vehicle wheels for simultaneous turning. The system, in one embodiment, includes a power steering unit having fixed or variable output for a given steering input. The system may further include a mechanism for reducing speed based upon mower steering angle. | 06-23-2011 |
| 20110198146 | STEERING APPARATUS - An improved apparatus ( | 08-18-2011 |
| 20130105242 | SYNCHRONIZING SYSTEM FOR HYDRAULIC FOUR WHEEL STEERING | 05-02-2013 |
| 20140367188 | STEERING SYSTEM FOR TURNING MULTIPLE SETS OF STEERABLE WHEELS - A steering system for turning multiple sets of steerable wheels comprises three steering gears operatively connected to the steerable wheels. Each steering gear includes a control valve assembly and has an associated hydraulic motor. The first control valve assembly directs pressurized fluid to a first hydraulic motor and also directs pressurized fluid to a second hydraulic motor. The third control valve assembly directs pressurized fluid to a third hydraulic motor. When a torque below a predetermined value is applied to an output shaft of the second steering gear, the output shaft rotates in response to movement of the first control valve assembly, and the second control valve assembly remains in a neutral condition. When a torque above the predetermined value is applied to the output shaft of the second steering gear, the output shaft rotates to cause the second control valve assembly to assume an actuated condition to direct pressurized fluid away from the second hydraulic motor. | 12-18-2014 |
| 20150083517 | RATCHET ASSEMBLY AND ROTATIONAL SENSOR DRIVE MECHANISM - A ratchet assembly may include a steer ring, a steer ring side structure, a steer cylinder bracket arm, a steer cylinder, a ratchet lock gear, a steering collar, a ratchet cylinder, a ratchet lock bar, and at least one sensor. When in a particular locked position, operation of the steer cylinder rotates the steer ring, the ratchet lock gear, and the steering collar. When in an unlocked position, operation of the steer cylinder rotates the steer ring around the ratchet lock gear. | 03-26-2015 |
| 20160039452 | CHARGE PRESSURE CIRCUIT ARRANGEMENT FOR STEERING CONTROL FOR A VEHICLE - A steering system is described for a vehicle having steerable wheels. A hydraulic charge pressure circuit may be configured to provide charge pressure to one or more hydraulic components of the vehicle, and a hydraulic drive pressure circuit may be configured to provide working pressure to one or more other hydraulic components of the vehicle. Hydraulic machines may rotate front wheels in order to drive the vehicle, and a front valve assembly may control steering of the front wheels by controlling the hydraulic machines. The hydraulic machines may be driven to rotate the front wheels by the working pressure from the hydraulic drive pressure circuit, and the front valve assembly may control the front hydraulic machines to steer the agricultural vehicle by controlling flow of hydraulic fluid from the hydraulic charge pressure circuit through the front valve assembly. | 02-11-2016 |
| 180415000 | With electrical control | 1 |
| 20090000854 | Device for Controlling the Steering of a Commercial Vehicle, and Vehicle Comprising One Such Device - The invention relates to a device for controlling the steering of a commercial vehicle comprising: two front wheels ( | 01-01-2009 |
