Doorknob disabling device
US6658906B1 · kind B1 · utility
24Cited by
16References
20Claims
0Family size
Inventor
Key dates
| Filing date | Jan 22, 2002 |
| Grant date | Dec 9, 2003 |
| Priority date | — |
| Expiry date | Jan 22, 2022 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T292/379
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A device for temporarily disabling a doorknob attached to a hinged door. The device covers the doorknob with a rigid enclosure, preventing rotation of the doorknob to move the associated locking bolt. A retaining unit is mated with an extension from the rigid enclosure in a male-female relationship, simultaneously with fitting the retaining unit over the outer edge of the hinged door while ajar. Closure of the door into the associated doorjamb, with the enclosure over the doorknob, prevents parting movement between the enclosure and the retaining unit, providing a self-locking feature.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.