Pivot hung power operated door and inertia insensitive disconnectable drive linkage therefor
US4007557A · kind A · utility
25Cited by
3References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 3, 1975 |
| Grant date | Feb 15, 1977 |
| Priority date | — |
| Expiry date | Mar 3, 1995 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE05Y2900/132
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
An inertia insensitive disconnectable drive linkage connects a power operator to a swinging door and comprises a door bracket fixed to the door and an arm operator pivoted thereto. A latch positively locks the operator arm to the bracket during normal powered swing of the door. A cam on the door frame releases the latch when the door is swung beyond the door closed position in the opposite direction of opening during emergency operation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.