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| Number | Title | Issue Date |
| 7083019 | Electrical wheelchair with an electrical seat-rotating device An electrical wheelchair includes a vertical rotating shaft connected fixedly to a seat member and journalled on a frame of a chair body, and a worm unit for transferring rotation of a motor shaft to the rotating shaft. A wheel-controlling switch is disposed on the ... | 08/01/2006 |
| 6968262 | Steering angle correction device Steering angle is determined by the combined use of a potentiometer and a rotary encoder, and the correction of the error in the determination of the steering angle based on the time-dependent change of the potentiometer. ... | 11/22/2005 |
| 6702049 | Electrical wheelchair with spliced front and rear wheel drive The electrical wheelchair with spliced front wheel drive and rear wheel drive of the invention comprises a wheel frame and a chair. The wheel frame has a hollow column with a locating ring on its top and a plurality of locating chute on the ring rim. A se... | 03/09/2004 |
| 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 |
| 6625529 | Apparatus for controlling steering angles of front rear wheels of vehicle A control apparatus comprises a target steering angle operation unit for operating target steering angles of front wheels and rear wheels, a steering increase/steering return determination unit for determining as to whether steering wheel manipulation is ... | 09/23/2003 |
| 6449543 | Steering device for vehicle In a steering device for vehicle, the movement of a steering actuator, which is driven in accordance with the rotating operation of an operating member, is transmitted to the vehicle wheels such that the steering angle changes without mechanically couplin... | 09/10/2002 |
| 6424896 | Steering column differential angle position sensor A steering column differential angle position sensor includes an upper flux shutter and a lower flux shutter, both of which form a plurality of similarly shaped openings. Receiver and transmitter coils are coaxially aligned with the shutters. The transmit... | 07/23/2002 |
| 6161638 | Work transfer lock system and method thereof A work transfer lock system and method includes a first work device, a second work device, a first platform, and a second platform. The system includes a locking device which locks the first platform relative to the second platform. The locking device fur... | 12/19/2000 |
| 5924506 | Motorized wheel assembly and toy vehicle with such wheel assembly A wheel assembly (42) for toy vehicles comprises a wheel (13) rotatably mounted on a pivot (25) having a support (49) for supporting it on a vehicle chassis and an electric power unit (44) connected to the wheel to set it in rotation. The power unit (44) ... | 07/20/1999 |
| 5830313 | Self-propelled floor covering scraper machine A self-propelled floor covering scraper machine including a frame having front and back ends, two independently controllable wheels, mounted on each side toward the back end of the frame, mechanisms for independently driving each wheel in either a forward... | 11/03/1998 |
| 5794305 | Articulation device for a vacuum cleaner A vacuum cleaner having an articulation mechanism which includes hemispherically shaped rearward wheels and spaced forward wheels, and a base member which pivotably couples the front and rear wheels so that the rearward wheels may be pivoted in a plane su... | 08/18/1998 |
| 4951766 | Electric wheel-chair As a rule, wheel-chairs have large(-diameter) drive wheels (3) and small(-diameter) steerable wheels (5), and wheel-chairs for indoor operation have their drive wheels as their rear wheels, while wheel-chairs for outdoor operation have their drive wheels ... | 08/28/1990 |
| 4485371 | Steering wheel system A steering wheel mechanism which provides a driver with absolute confirmation of the direction of the orientation of the front wheels by a differential gear reduction mechanism which provides for a reduced amount of rotation of a buffer pad in comparison ... | 11/27/1984 |
| 4484646 | Recreational vehicle A vehicle primarily intended for use as a recreational vehicle is disclosed having a pair of laterally spaced drive wheels and a pair of longitudinally spaced wheels mounted on the frame. A gasoline engine provides power to the drive wheels. Control lever... | 11/27/1984 |
