Child resistant closure
US5020681A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 1, 1990 |
| Grant date | Jun 4, 1991 |
| Priority date | — |
| Expiry date | Feb 1, 2010 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65D50/041
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A child resistant closure comprising outer and inner nested closure members each of which has a base wall on a peripheral skirt with sets of lugs on the inner surface of the outer closure member and on the outer surface of the inner closure member which are adapted to be engaged when the members are moved axially toward one another. The outer surface of the base wall of the inner closure member is provided with a plurality of ramps and depressions and the inner surface of the base wall of the outer closure member is formed with a plurality of integral spring fingers. When the closure is applied, the springs fingers engage the depressions and orient the outer closure member and inner closure member preventing inadvertent engagement of the lugs by any top load. When the outer closure member is rotated relative to the inner closure member without bringing the lugs thereof into engagement, the spring fingers slip over the ramps allowing the outer closure member to rotate with respect to the inner closure member.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.