Door closer permitting free-swing and regular-closer modes
US4287639A · kind A · utility
30Cited by
7References
6Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 29, 1979 |
| Grant date | Sep 8, 1981 |
| Priority date | — |
| Expiry date | Mar 29, 1999 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE05Y2900/132
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
Door closer of the type which holds the door open until an associated electric circuit is opened or closed. Provides means for free swinging of the door when the door closer is "cocked". This is achieved by a drive plate interposed between the closer shaft and its operator arm. The plate provides a pair of apertures which may selectively retain a pin adapted to work against the closer arm.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.