Door closing apparatus
US5951069A · kind A · utility
9Cited by
9References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 24, 1997 |
| Grant date | Sep 14, 1999 |
| Priority date | — |
| Expiry date | Apr 24, 2017 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T292/1082
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A door closer device includes an active lever which, when it is in an abnormal state-with respect to a latch lever, automatically returns a door to a normal state by means of a door closing operation. An active latch which is pivotably supported by an active lever is freely rotatable in one direction, but is rotation regulated by an arm of an active pawl, i.e. a cancel lever, in the other direction. This prevents the latch lever from jumping over the active latch and causing an abnormal state in which the active latch swings wide with respect to the latch lever.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.