Lip extender for loading dock levelers
US4065824A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 4, 1976 |
| Grant date | Jan 3, 1978 |
| Priority date | — |
| Expiry date | Aug 4, 1996 |
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 to 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. A coil spring mounted about the lower pivotal point of the lower link exerts pressure against the lower link, thereby counter-balancing the weight of the lip and bridge plate during pivotal movement of the lower link in either direction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.