Security device
US5007263A · kind A · utility
20Cited by
8References
4Claims
0Family size
Inventor
Key dates
| Filing date | Jun 22, 1990 |
| Grant date | Apr 16, 1991 |
| Priority date | — |
| Expiry date | Jun 22, 2010 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T292/34
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
The present invention relates to an improved security device. The improved security device includes a U-shaped member which is designed to engage the shaft of a doorknob. Attached to the U-shaped member is a locking plate which has openings therein to receive either the latch of a deadbolt or the key head of a key inserted into a deadbolt. The improved security device, when in place, prevents entry into a dwelling by a person unlocking a deadbolt by preventing the rotation of a deadbolt latch or a key head inserted into the deadbolt.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.