Locking device for a sliding door
US4198786A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 25, 1978 |
| Grant date | Apr 22, 1980 |
| Priority date | — |
| Expiry date | Apr 25, 1998 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T74/18704
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A sliding door of the type employed in public transport vehicles and driven by an electric motor comprises at least one door-leaf coupled with a nut mounted on an endless screw which is driven in rotation in order to open and/or close the door. The nut is displaced in translational motion within a guide which prevents rotational motion. The locking device comprises means for interrupting the translational displacement of the guided nut at the end of travel and for permitting angular rotation of the nut with the endless screw, means for limiting the angular displacement of the nut and finally means for limiting the translational motion of the nut if it is displaced along the endless screw and no longer engaged in the guide.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.