Tamper-evident closure employing inner cap and outer sleeve and container utilized therewith
US4726483A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 18, 1987 |
| Grant date | Feb 23, 1988 |
| Priority date | — |
| Expiry date | May 18, 2007 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S215/901
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A unitary tamper-evident closure includes an inner threaded cap member (16) interconnected by circumferentially spaced-apart, radially extending break-away tabs (18) to an outer skirt (14) that is concentric with the inner cap member (16). The outer skirt includes a plurality of circumferentially spaced-apart first abutment members (20) that cooperate with circumferentially spaced-apart abutment members (22) on the inner cap member to transmit a driving force from the outer skirt to the inner cap member when the closure is being rotated onto the threaded neck (24) of a container (10). The first abutment members (20) also cooperate with the abutment members (22) for imparting axially oriented forces to the inner cap member (16) and outer skirt (14) in opposite directions when the closure initially is unthreaded from the neck (24). In the preferred embodiment of the invention the outer skirt is provided with a plurality of circumferentially spaced-apart second abutment members (26) for cooperating with a plurality of circumferentially spaced-apart locking members (28) on a container (10) to assist in maintaining the closure in a closed condition, and also to assist in applying an axi…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.