Single column load dividing gate
US4294569A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 14, 1979 |
| Grant date | Oct 13, 1981 |
| Priority date | — |
| Expiry date | Jun 14, 1999 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60P7/14
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
The present suspension mechanism for load dividing gates of single column type promotes reliability and safety by extreme simplicity and unity of carriage structure, together with highly effective provision against structural failure even of the inherently rugged support elements. By means of features including special bearing design, roller placement and novel keeper support, the invention provides suspension of a column gate from a single track with security against structural failure believed at least equal to that normally attained for conventional gates with dual track support. Improved manual control mechanism for the locking pins provides in highly compact and reliable form independent operation either from inside the car or from outside through an open doorway.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.