Locksmith tool apparatus for determining length of locking elements in locks
US4535546A · kind A · utility
18Cited by
6References
18Claims
0Family size
Inventor
Key dates
| Filing date | Feb 27, 1984 |
| Grant date | Aug 20, 1985 |
| Priority date | — |
| Expiry date | Feb 27, 2004 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T70/7797
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Locksmith tool apparatus determines the length of a locking element in a lock by engaging a locking element inside a lock and by moving the element to compress a compression spring to a known minimum length and by measuring the distance moved. By subtracting the distance the element is moved from known dimensions, the length of the locking element is determined.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.