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7596441 |
Power steering device
In a power steering device employing a hydraulic power cylinder, a motor-driven pump, and a driving power source for the motor, a power steering control system is configured to electrically...
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7506719 |
Self-synchronizing hydraulic system
A fluid system is described, which comprises first and second cylinders, each of which comprises a piston, and a first end and a second end corresponding to full stroke positions of the...
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7434652 |
Hydraulic power steering apparatus
An oil pressure regulating valve of rotary type comprising a valve body and a valve spool is constructed inside a housing having a cylindrical shape. An oil supply port for supplying pressure oil...
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7389847 |
Hydraulic four-wheel driving articulated vehicle
A hydraulic four-wheel driving articulated vehicle comprises: a first frame, on which first axles and a first hydraulic motor driving the first axles are mounted; a second frame, on which second...
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7374011 |
Power steering apparatus
A power steering apparatus includes an input shaft, an output shaft, a piston arranged to separate a first hydraulic chamber and a second hydraulic chamber, a ball screw mechanism, an output...
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7255194 |
Steering system for a zero-steer vehicle
A vehicle is provided having a steering system for selectively operating the vehicle in a zero-steer configuration. The system includes a forward steering assembly coupled to a steering wheel and a...
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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...
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7096993 |
Steering mechanism
In a steering mechanism for a motor vehicle having a steering wheel with a steering shaft connected to a steering gear arrangement, the steering shaft comprises a first vibration damping element...
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6913102 |
Working vehicle with traversing system
A working vehicle with a traversing system wherein a front wheel is installed on a swing member rotatable about a vertical axis relative to a body and including a rotating cylinder for rotating the...
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6868935 |
Arrangement and method for operating self-steering wheels
Method and arrangement for operating self-steering wheels on a non-driving axle ( 3 ) in a vehicle, which wheels ( 1, 2 ) are each mounted on their own stub axle ( 4, 5 ) and connected to a tie rod...
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6827176 |
Vehicle with offset extendible axles and independent four-wheel steering control
A vehicle includes a chassis supporting two front axle assemblies and two rear axle assemblies. Each of the front and rear axle assemblies includes an extendible and retractable axle supporting an...
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6684974 |
Four-wheel steering system for utility vehicle
A four-wheel steering system includes a frame that carries an axle that rotationally mounts a pair of front wheels via a pair of front pivotal wheel support assemblies. For steering, the front...
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6527078 |
Steering system for rear wheels of a trailer
A steering system for rear wheels of a trailer for more easily and precisely steering a back end of the trailer when the trailer is moving in a reverse direction. The steering system for rear...
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6513614 |
Transmission on all wheel steer power machine
A power machine including a transmission, a chain case, a motor and a hydraulic cylinder having a rod end and a base end and a plurality of hose couplings. The hydraulic cylinder coupled to a chain...
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6488114 |
Grain cart
An improved grain cart is able to hold more grain with reduced field compaction to derive greater yield from a farm field. The grain cart includes a frame which supports a grain hopper and is...
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6390228 |
Hydraulic power steering apparatus for vehicle
A hydraulic power steering apparatus for a vehicle is provided with a main control valve in which a valve opening degree is controlled on the basis of a relative movement between an input shaft...
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6267198 |
Offset kingpin for a rear steering axle on an agricultural combine
The invention consists of an offset kingpin in the rear steering axle of a self-propelled combine harvester. Attached to the rear axle is a knuckle. The kingpin is pivotally attached to the knuckle...
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6186266 |
Steerable tag axle system
A steering system (11) reduces the steering radius and minimizes tire scuffing is used with vehicles which include a front steering assembly having first and second wheels (20a, 20b) and a tag axle...
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6131691 |
System for guided steering of at least one set of wheels of a semi-trailer or a trailer
The system for guided steering of a set of rear wheels of a semi-trailer comprises a pulling vehicle and a semi-trailer having rear wheels which are turnable with respect to a chassis of the...
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6052633 |
Power steering apparatus for electric vehicle
A power steering apparatus for an electric vehicle has a steering mechanism for steering a pair of steered wheels upon receiving assist power from a steering assist-power according to a steer force...
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6021687 |
Selector mechanism for operating a gearbox
A gearbox is provided with a selector shaft, which is capable of reciprocating movement for selecting the selector slot and rotating movement for changing gears. A gear lever is connected to a...
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5899292 |
Hydraulic drive and steering systems for a vehicle
Front and rear wheeled units (13, 14) of vehicle are connected together for articulated steering. Wheels on at least one unit are mounted for swivelling relative to the respective unit to provide...
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5823284 |
Utility vehicle
A vehicle having a hydrostatic drive and transmission having multi-range speed modes, a counter configured steering assembly providing for a turning radius less than would normally be commensurate...
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5769179 |
Power steering system and method for a vehicle
A power steering system for a vehicle having a gear box and an intermediate shaft connected thereto, includes first and second sensors for detecting a speed of the vehicle and a pressure within a...
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5758740 |
Automatic rear wheel self-centering device for four-wheel steering vehicles
An automatic rear wheel self-centering device for four-wheel steering vehicles automatically performs the rear wheel self-centering operation when the steering mode of the vehicle returns from...
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5752578 |
Control apparatus
A steering control apparatus is disclosed for a first and second pair of wheel assemblies that are mounted for rotation with respect to a first and second axle. Selective rotation of the respective...
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5718304 |
Four-wheel steering system for vehicle
A four-wheel steering system for a vehicle including a front wheel Steering part having a front direction control valve having ports which close and open in accordance with a rotating direction of...
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5609221 |
Steering control system
Known all wheel steer arrangements use standard spool-type valves which are inherently subject to leakage that results in the front and rear wheels getting out of synchronization due to the...
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5582264 |
Power assisted steering system, in particular, for motor vehicles
A power assisted steering system, in particular, for motor vehicles, contains a servomotor (2), a servopump (3), a tank (4), a control valve (1) with a controllable feedback device (5), and a...
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5560640 |
Rear suspension for a four-wheel steering system
A rear suspension for a four-wheel steering system, has a wheel carrier for rotatably supporting a wheel. There is a subframe mounted on a lower portion of a vehicle body with a plurality of links...
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5394959 |
Scissor lift apparatus for work platforms and the like
A scissors lift apparatus has three scissor units for supporting heavy loads. A central scissor unit has its arms located inwardly of the immediately lower and upper scissor units, and folds into...
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5351777 |
Rear wheel turning system for vehicle and method of neutral adjustment of the same
When incorporating a rear wheel turning system having a mechanical system and hydraulic system, an end of the displacement transmission member, which transmits displacement of the output member of...
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5335746 |
Electromagnetic clutch driven steerable axle
An electromagnetic clutch driven steerable drive axle system for a four-wheel drive vehicle, such as a front mount mower, including a rotary power source, a driven front axle, a mechanical rear...
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5322308 |
Four wheel steering systems
A front and rear wheel steering system for a vehicle has a front steer system (23, 25) and a rear steer system (21, 22) with a rear steer controller (12) functioning to set the rear steer angle in...
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5320192 |
Rear wheel steering device
A rear wheel steering device is provided in a vehicle with a simple structure in which rear wheels are supported at both end portions of a rear axle housing along a width direction of a chassis in...
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5295554 |
Steering system for an agricultural bagging machine
An agricultural bagging machine including a wheeled frame having at least first and second wheels provided at the forward end thereof and at least third and fourth wheels provided at the rearward...
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5244052 |
Steering control unit for multiple steerable axles
A hydraulic steering system is provided including a hydraulic steering unit (3) provided with a housing (6) having an inlet port (7), an outlet port (8), and a pair of control ports L and R. A...
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5236057 |
Rear wheel steering apparatus for vehicle
A rear wheel steering apparatus for a vehicle, comprises a hydraulic cylinder for displacing a steering rod connected to left and right rear wheels axially, a centering spring for biasing the...
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5234067 |
Tandem axle suspension for vehicle
A tandem axle suspension for use in a vehicle such as a truck or semi-trailer, which is particularly efficient and stable and well adapted for use when the axles support steering wheels, has, on...
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5230399 |
Four-wheel steering system for vehicles
A vehicle having at least four wheels comprising a pair of front wheels and a pair of rear wheels, first and second reversible hydraulic cylinders coupled respectively to the front wheels for...
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5213143 |
Steering and propulsion mechanism for agricultural field vehicle
A field crop collection vehicle provides improved crop collection and storage. The vehicle steers through mutually orthogonal directions of travel and includes forward and reverse propulsion for...
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5193638 |
Reference position detection method of vehicle rear wheel steering apparatus
A reference position detection method of a vehicle rear wheel steering apparatus in the present invention, is provided with steps of setting an input shaft and the yoke assembly at arbitrary...
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5168948 |
All-wheel steering for motor vehicles
A rear wheel steering is operated by a mechanical gear, which is connected on an input side to a front wheel steering. The gear has a controllable transmission ratio, a control element controlling...
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5147008 |
Four-wheel vehicle steering apparatus
A four-wheel steering apparatus for a vehicle includes a hydraulic actuator for steering the rear wheels, and first and second oil pumps. An in-phase steering control valve is connected between the...
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5099939 |
Multi-axle steering system
In multifront and rear steering systems a problem exists due to fluid leakage which causes lack of synchronization in return to straight ahead steering position between the front and rear steering...
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5092419 |
All-wheel steering
An all-wheel steering control or regulating device for vehicle rear wheel steering, which is motor-driven and permits any desired predeterminable steering angles of the rear wheels as a function of...
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5090512 |
Four-wheel coordinated steering multi-purpose tractor
A four-wheel mobile vehicle including provision for controlling the steering position of each of the four (4) wheels so that every wheel's rolling axis will intersect at a common point around which...
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5052506 |
Control valve and four-wheel steering system including control valve
A control valve includes a first valve having a cylinder and a piston arranged in the cylinder. The piston defines in the cylinder a pressure receiving chamber and first and second output pressure...
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5031714 |
Steering gear ratio changing apparatus
A steering gear ratio changing apparatus includes a first and second steering shafts arranged to be coaxial with each other. The first steering shaft is coupled to a steering wheel of a vehicle and...
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5020627 |
Four-wheel drive tractor
A highly maneuverable four-wheel drive, four-wheel steer tractor is provided with hydraulic motors mounted at each wheel to drive the wheels. Each wheel and associated hydraulic motor is pivotable...
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