Anti-theft device for door locks
US9982457B2 · kind B2 · utility
Inventor
Key dates
| Filing date | Mar 22, 2016 |
| Grant date | May 29, 2018 |
| Priority date | — |
| Expiry date | Jul 23, 2036 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE05Y2900/132
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
The anti-theft device is configured in a door lock, and contains a first blocking piece, a second blocking device, a positioning piece, and a lever. The first blocking piece contains a first section and a second section bended and extended perpendicularly from the first section. The first section has a first through hole and a second through hole. The lever is engaged by a lock heart of the door lock. When the door lock is locked, the lock heart is turned to engage the lever so that the lever drives the first blocking piece downward by its first through hole. The second section of the first blocking piece as such blocks a lock tongue of the door lock so that the door lock cannot be opened without using key.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.