Pressure release tamper indicating feature for closure
US4778072A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 29, 1982 |
| Grant date | Oct 18, 1988 |
| Priority date | — |
| Expiry date | Nov 29, 2002 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65D47/0838
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
This relates to a closure unit of the type including a closure member lockable in place having secured thereto a lever for effecting unlocking of the closure member. The closure unit has a tamper indicating feature in the form of a rivet projecting from the closure member and being received in a ring member releasably integrally formed with the lever. The rivet has been modified to have a blind hole opening through the underside of the closure member for presentation to the interior of an associated container whereby, should the rivet be severed from the closure member, the blind hole will open to the atmosphere and permit a venting under high pressure of the interior of the container.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.