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"That’s an amazing invention, but who would ever want to use one of them?"
President Rutherford B. Hayes ; Said in 1876, after Alexander Graham Bell demonstrated the telephone to him at the White House
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| Number | Title | Issue Date |
| 7458431 | Multi-wheel vehicle A vehicle comprises a steering operation device, a pair of running-driving wheels, which differentially drive when the steering operation device is manipulated, a pair of steerable running wheels interlocking with the steering operation device, and a steering mechan... | 12/02/2008 |
| 7325636 | Front-wheel drive steering compensation method and system A method of controlling the speed of a right front wheel and a left front wheel on a work machine includes receiving a speed command based at least partially on an operator input and monitoring at least one wheel steering angle of at least one front wheel. A first f... | 02/05/2008 |
| 7294082 | Powertrain arrangement for a skid-steer vehicle A powertrain arrangement for selectively operating a vehicle in a skid-steer configuration is provided. The arrangement includes an engine coupled to a differential. A first torque transfer mechanism is coupled to a coupling mechanism and arranged to drive a first s... | 11/13/2007 |
| 7264068 | Steering control system for a skid steer vehicle A skid steer vehicle has a steering controller that monitors the speeds of the left and right wheels and steers those wheels in directions that are calculated to reduce, eliminate or minimize wheel skidding with respect to the ground while the vehicle is turning. | 09/04/2007 |
| 7237629 | Zero-turn radius vehicle with steerable front wheels The present invention relates to a zero turning radius vehicle having at least one steerable front wheel and a multistage steering input system separately capable of steering the at least one front wheel and selectively driving the drive wheels. A front wheel steeri... | 07/03/2007 |
| 7229139 | Control system for brake-steer assisted parking and method therefor A system and method of controlling an automotive vehicle includes determining a steering wheel angle, determining a steering wheel direction, determining a steering wheel angular rate and applying brake-steer as a function of steering wheel angle, steering wheel ang... | 06/12/2007 |
| 7152704 | Four-wheel drive work vehicle A four-wheel drive work vehicle includes an engine, a pair of right and left steerable wheels rotatably driven by receiving power from the engine via a differential mechanism, a pair of right and left non-steerable wheels rotatably driven by receiving power from the... | 12/26/2006 |
| 7044244 | Multi-wheel vehicle A vehicle comprises a steering operation device, a pair of running-driving wheels, which differentially drive when the steering operation device is manipulated, a pair of steerable running wheels interlocking with the steering operation device, and a steering mechan... | 05/16/2006 |
| 6962219 | Mechanical ZTR system with steering wheel A ZTR vehicle includes true or proper ZTR steering in the forward and reverse directions. The vehicle has independently driven locomotive drives that drive the wheels to provide mobility and steering to the vehicle. A steering wheel is included that pivots one of tw... | 11/08/2005 |
| 6951259 | Multi-wheel vehicle A vehicle comprises a steering operation device, a pair of running-driving wheels, which differentially drive when the steering operation device is manipulated, a pair of steerable running wheels interlocking with the steering operation device, and a steering mechan... | 10/04/2005 |
| 6840345 | Steering system for vehicle with four drive wheels Steering system for vehicles comprises a frame with a front axle and a rear axle, at least one of these carrying two steered wheels, the wheels of each axle being driven by a hydraulic motor via a differential unit, the steered wheels being connected, for steering c... | 01/11/2005 |
| 6830115 | Axle driving apparatus An axle driving apparatus of the invention is available for an economical vehicle having a belt type stepless transmission. The axle driving apparatus includes a pair of axles connected to respective drive wheels, a propelling transmission mechanism, and a steering ... | 12/14/2004 |
| 6688645 | Turn-limited column assembly A turn-limited column assembly comprises a column rotatable about an axis. The column rotates a first plate that defines a first spiral track. The first plate rotates relative to a second plate that defines a second spiral track. The plates are arranged s... | 02/10/2004 |
| 6554085 | Multi-wheel vehicle with transmission for driving-steering A multi-wheel vehicle provided with at least six running wheels, that is, a pair of first running wheels serving as driving wheels, a pair of second running wheels such as castors disposed before or behind said pair of first running wheels so as to be lat... | 04/29/2003 |
| 6530442 | Method of synchronizing first and second steering arrangements A method of synchronizing first and second steering arrangements is provided to control the steering of a machine. The first steering arrangement has steerable wheels that turn in response to a steer input. The second steering arrangement has non-steerabl... | 03/11/2003 |
| 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 interlocking with a steering wheel and an output shaft interl... | 05/21/2002 |
| 6076626 | Steering system for multi-track motor vehicles An emergency backup steering system for a wheeled vehicle controls steering of the vehicle upon failure of the primary vehicle steering system, by unequal braking of wheels on opposite sides of the vehicle.... | 06/20/2000 |
| 5285866 | Drive train The invention provides a drive train for propelling a vehicle capable of being used for transporting ore, coal or broken rock in underground mining operations. The vehicle has front and rear wheelsets, each comprising a right and left side wheel. The driv... | 02/15/1994 |
| 4669559 | Four-wheel driven vehicles A four-wheel driven vehicle including a front wheel high/low speed changeover device adapted to be set to the high speed side upon detection of at least one condition out of three conditions, i.e. an excessive turning angle of the front wheel over a prede... | 06/02/1987 |
| 4470489 | System for controlling a power transmission of a four-wheel drive vehicle A system for a four-wheel drive vehicle for automatically changing a power transmission system of the engine of the vehicle from four-wheel driving system to two-wheel driving system in accordance with the steering angle during the turning of a corner. Th... | 09/11/1984 |
| 4293050 | Transmission-differential combination A rotating drive wheel which drives a pair of output shafts. The driving of each of the output shafts proceeds via a mechanical transmission which delivers rotary motion from the drive wheel to the output shafts. A drive ratio delivered by each of the tra... | 10/06/1981 |
