Releasable locking system
US4320844A · kind A · utility
17Cited by
12References
1Claims
0Family size
Inventor
Key dates
| Filing date | Jun 6, 1977 |
| Grant date | Mar 23, 1982 |
| Priority date | — |
| Expiry date | Jun 6, 1997 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S215/01
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A container closure system such that an uninstructed person would find it difficult to remove the closure. Helical screw threads on the container and on the one-piece closure have detents and discrete thread portions engageable under the influence of a spring means once the closure has been screwed onto (cap) or into (stopper) the container to a certain extent. Unscrewing can only be effected by firstly overcoming the spring means to separate the locking detents/thread portions and subsequently turning the closure while continuing to overcome said spring means.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.