Tamper-evident child-resistant closure
US4598833A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 29, 1985 |
| Grant date | Jul 8, 1986 |
| Priority date | — |
| Expiry date | Aug 29, 2005 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65D50/041
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A child-resistant, tamper-evident closure having nested inner and outer caps with ratchet teeth on the interfacing skirt walls of the respective caps to cooperate to fasten the closure onto the container, and ratchet teeth on the interfacing top walls of the respective caps for removal of the closure upon simultaneous application of torque and a downward force. The inner cap further includes a tamper-indicating ring depending from the lower edge of its skirt, the ring including a breakable connection for detachably securing the lower portion thereof to the inner cap skirt. A plurality of tabs extending upwardly and radially inwardly from the ring engage an annular shoulder on the container during the removal of the closure to break the ring away from the inner cap skirt.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.