Universal lip lifting device
US6629328B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 9, 2001 |
| Grant date | Oct 7, 2003 |
| Priority date | — |
| Expiry date | Oct 9, 2021 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65G69/2823
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A dock leveler includes a frame, a ramp, a lip, and a linkage. The ramp is rotatably coupled to the frame for rotation between a substantially horizontal first position and an inclined second position. The lip is coupled to the ramp for rotation between a pendent position and an extended position. The linkage is coupled to the lip and includes a pivot point and a centerline. The linkage supports the lip in the extended position when the pivot point is on a first side of the centerline and allows the lip to fall pendent under the force of gravity when the pivot point is on a second side of the centerline. The pivot point is moved from the first side of the centerline to the second side of the centerline when the lip is contacted by a vehicle that creates a downward moment on the lip.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.