Apparatus and method for preventing unwanted opening of a locked enclosure
US9512664B2 · kind B2 · utility
0Cited by
7References
9Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 11, 2014 |
| Grant date | Dec 6, 2016 |
| Priority date | — |
| Expiry date | Aug 9, 2034 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T292/0994
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
An apparatus for preventing unwanted opening of a locked enclosure. The enclosure includes a lock, a door and a door bolt. The door is openable when the door bolt is retracted from a structure surrounding the enclosure. The apparatus includes a frangible guard plate, and an arm coupled to the guard plate by a spring. The arm is maintained in a first position under a bias of the spring. When the guard plate is fractured, the arm is free to move from the first position into a second position. The arm is positioned to engage the door bolt in the second position, thereby preventing retraction of the door bolt.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.