Skeleton key kit
US4400956A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 5, 1981 |
| Grant date | Aug 30, 1983 |
| Priority date | — |
| Expiry date | Aug 5, 2001 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T70/7881
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A key kit for opening tumbler locks has a key member with a shaft insertable into a tumbler lock, the shaft having a series of longitudinally-spaced recesses into which the tumblers in the lock can respectively enter. A foil of impressionable material is removably positionable on the shaft over the recesses, and a tumbler displacing member is insertable into the lock with the shaft and foil to displace the tumblers without the tumblers engaging the foil. The tumbler displacing member being removable from the lock after the shaft and foil have been inserted therein to enable the key member to be manipulated to cause the tumblers to make impressions in the foil corresponding to the key shape required to open the lock.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.