Lip extender for loading dock levelers
US3974537A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 15, 1975 |
| Grant date | Aug 17, 1976 |
| Priority date | — |
| Expiry date | May 15, 1995 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65G69/2894
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A lip extender for use with a loading dock leveler. The lip extender includes a lower link connected at its lower end to the base plate of the leveler and a toggle arm connected at its upper end beneath the lip. The opposite ends of the toggle arm and lower link are pivotally connected together. Upward movement of the hinge connection between the bridge plate and lip moves them both upwardly to a cocked position in which they are supported by the toggle arm and lower link, which pivot into an over-center position. Downward force exerted on the upper part of the bridge plate causes a cam follower carried by the pivotal connection between the toggle arm and lower link to engage a cam surface mounted beneath the bridge plate. The lip is thereby extended simultaneously upwardly and outwardly over the rear edge of a truck disposed adjacent to the dock. When the lip reaches its fully extended position, the toggle arm moves past the center position and allows the lip to drop onto the truck bed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.