Pit-mounted load elevator
US5490758A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 28, 1994 |
| Grant date | Feb 13, 1996 |
| Priority date | — |
| Expiry date | Jun 28, 2014 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB66F7/08
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A self-adjusting pneumatic load elevator is adapted for mounting in a pit so that it can be used with pallet trucks. The elevator has a base, a rotatable, horizontal load platform, a vertically expandable scissors linkage mechanically coupled between the load platform and the base, and an air actuator chamber. To accommodate a rectangular pit opening, the load platform has a circular, rotatable portion surrounded by a rectangular, non-rotatable transition frame which fits with small clearance in the pit opening. An automatic brake prevents the rotation of the load platform when it is flush with the floor, and lightweight, vertically movable skirts on the load platform can strike a worker's toe to warn of danger. To prevent dangerous rebounds, when the elevator fully descends, it automatically releases the air in the air actuator chamber.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.