Door closer assist linkage
US4419787A · kind A · utility
18Cited by
11References
8Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 23, 1982 |
| Grant date | Dec 13, 1983 |
| Priority date | — |
| Expiry date | Sep 23, 2002 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE05Y2900/132
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A control linkage for use with a door closer, wherein the linkage is provided with a spring which resiliently biases against relative rotation of a pair of arms as the arms approach a door-open limit position, and which aids the door closer in moving the door from the door-open limit position.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.