Wheeled apparatus having multiple wheelbase configurations
US8413999B2 · kind B2 · utility
Inventors
Key dates
| Filing date | Apr 20, 2010 |
| Grant date | Apr 9, 2013 |
| Priority date | — |
| Expiry date | Jul 15, 2031 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB62B2301/10
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A wheeled apparatus has a pair of first-size wheels attached in a spaced apart arrangement to a main frame at its first end portion. A subframe is moveably attached at its first end portion to the main frame at a position between the first-size wheels and a second end portion of the main frame. The subframe is attached to the main frame for allowing the subframe to be freely moved between a first position and a second position. The subframe and the main frame jointly limit movement of the subframe to be between the first and second positions. A pair of second-size wheel is attached to a second end portion of the subframe. The first-size and second-size wheels jointly provide a first wheelbase length when the subframe is in the first position and jointly provide a second wheelbase length when the subframe is in the second position.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.