Tamper resistant combination lock
US6119493A · kind A · utility
4Cited by
18References
23Claims
0Family size
Inventors
Key dates
| Filing date | Mar 4, 1998 |
| Grant date | Sep 19, 2000 |
| Priority date | — |
| Expiry date | Mar 4, 2018 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T70/5053
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
An improved tamper resistant combination lock with large planar easy to shift blocking slides with spring fingers that fool the lock picker into believing all three positions of the slides are blocking positions, rather than passing positions. The slides block or pass spaced spheroidal obstructions on a plunger. A small bifurcated clip prevents the complete removal of the plunger when all blocking slides are in the pass position. In one embodiment the lock is a padlock-type with a "U" shaped shackle that lies in a common plane with the slides to reduce lock size.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.