Door closer power adjusting device
US7234201B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 14, 2004 |
| Grant date | Jun 26, 2007 |
| Priority date | — |
| Expiry date | Jul 14, 2024 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE05Y2900/132
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A door closer power adjusting device for a door closer having a spindle driven by a compressed spring with a movable plate for adjusting spring compression, or with a screw for adjusting spring compression, between a high and low level of compression. A powered unit moves the plate in a first direction to achieve the low level of compression and in a second direction to achieve the high level of compression. A switch activates the powered unit in the first direction and a first switch is engaged when the spring is compressed to the low level of compression to deactivate the powered unit. A timing circuit activates the powered unit in a second direction after passage of a predetermined time. A second switch is engaged when the spring is compressed to the high level of compression to deactivate the powered unit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.