Lift ramp
US8161589B1 · kind B1 · utility
Inventors
Key dates
| Filing date | Feb 15, 2011 |
| Grant date | Apr 24, 2012 |
| Priority date | — |
| Expiry date | Feb 15, 2031 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65G69/2829
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
An adjustable ramp apparatus installed as part of a flat surface, such as a deck, adapted for angular elevation to an inclined position for providing a ramp between the platform level and the entryway door sill level of a trailer-type home. The apparatus is elevated by means of an actuator-driven mechanical linkage located under the surface of the primary ramp platform adjacent to the trailer type home or structure. When the actuator is disengaged, the ramp returns to a lowered position so that the door to the home is not blocked. An alternative embodiment includes a secondary threshold ramp located beneath the surface of the primary ramp platform that moves into place as the apparatus is actuated to fill the gap between the door sill and the elevated primary ramp platform.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.