Door operator with locking mechanism
US4087939A · kind A · utility
26Cited by
3References
22Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 11, 1977 |
| Grant date | May 9, 1978 |
| Priority date | — |
| Expiry date | Feb 11, 1997 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE05Y2900/51
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
Door operator for doors on a passenger carrying vehicle such as a bus or the like for moving a door between open and closed positions and having a locking mechanism with a lost motion action for unlocking the doors prior to the door opening cycle.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.