Automatic seal crossover system for power and free conveyor on-floor carriages
US5544590A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 14, 1995 |
| Grant date | Aug 13, 1996 |
| Priority date | — |
| Expiry date | Sep 14, 2015 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB61B10/04
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
The present invention is directed to a seal crossover system which includes two seal plates adjacent to slot crossover portions of separate respective conveyor loops as they diverge (or converge) past a switch in a power and free conveyor system. The seal plates are driven by respective pneumatic cylinders which are pneumatically linked to a switch cylinder such that the seal plates are automatically extended or retracted depending upon the condition of the switch. Thus a respective slot crossover portion of each conveyor loop is selectively and alternately sealed or opened to allow unimpeded passage of a load carriage and a drive trolley, respectively.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.