Plate-type door opening control device
US3993339A · kind A · utility
15Cited by
1References
5Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Jul 22, 1975 |
| Grant date | Nov 23, 1976 |
| Priority date | — |
| Expiry date | Jul 22, 1995 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T292/57
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
The invention relates to a device for controlling the opening and closing of a door, whether hinged or sliding, from both outside and inside, said device comprises, mounted on a common shaft, a first control plate replacing the conventional handle and rotatably rigid with said shaft, said first plate being housed in an external case, and another control plate mounted for loose rotation on said shaft and housed in an internal case, means being provided for interconnecting said plates when being rotated in one direction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.