Electrically operated door strike with thermally responsive element
US11332960B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 17, 2018 |
| Grant date | May 17, 2022 |
| Priority date | — |
| Expiry date | Jun 20, 2040 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE05B51/02
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
In one aspect the present invention provides a door strike which prevents the opening of an associated door when the door strike has been heated to an elevated temperature of at least about 1000° F., preferably when the door strike is at higher temperatures such as are present during a fire in a building structure. The door strike includes a thermally responsive element which retards the normal operation of the door strike when it is at an elevated temperature. A further aspect of the invention is a method for controlling the undesired spread of a fire or smoke between adjacent spaces separated by the door wherein a fire or smoke condition exists in at least one of these spaces, via the provision of a door strike having a thermally responsive element which retards the normal operation of the door strike when it is at an elevated temperature.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.