Toy vehicle with gyroscopic action rear wheels
US6024627A · kind A · utility
Inventors
Key dates
| Filing date | Aug 19, 1997 |
| Grant date | Feb 15, 2000 |
| Priority date | — |
| Expiry date | Aug 19, 2017 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA63H17/004
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
A remotely controlled toy vehicle includes a pair of parallel front wheels a pair of rear wheels at least essentially unchanging in configuration and outer diameter during operation, and a pair of reversible electric motors controlled remotely from the vehicle, each motor driving a separate one of the pair of rear wheels independently of the other motor and other rear wheel to selectively propel and steer the toy vehicle during operation. Each rear wheel has a maximum outer diameter (D) that is: greater than a minimum distance (T) between facing sides of the pair of rear wheels; more than twice the diameter (d) of each front wheel; greater than the distance (WB) between the front and rear wheel axes; and/or more than one-half the overall vehicle length (L) along its centerline. At least two-thirds and suggestedly at least three-quarters of the weight of each rear wheel is located within fifteen percent of an outer end of the rear wheel radius adjoining an outer circumference of each rear wheel. The combined weights of the two rear wheels is at least thirty percent of the total weight of the vehicle and, where the vehicle includes a battery power supply to operate the motors, the co…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.