Lift apparatus for a ground vehicle
US5203153A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 28, 1991 |
| Grant date | Apr 20, 1993 |
| Priority date | — |
| Expiry date | May 28, 2011 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA01F2015/0795
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A lift apparatus for raising and lowering a ground vehicle. A pair of transversely opposite frame members are interconnected at their lower end portions by a transversely extended crank axle. A pair of four-bar parallelogram linkages are located on either side of the vehicle and each of which includes a lever plate which supports a ground wheel of the vehicle. An upper link pivotally interconnects the lever plate to the associated frame member. A lower link is pivotally attached at one end to the lever plate and is secured at its other end to the crank axle, thereby forming a crank arm. A hydraulic cylinder is interconnected between each of the lever plates and the associated frame member. Extension and retraction of the cylinders raises and lowers the vehicle.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.