Self-closing closures
US3981419A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 1, 1975 |
| Grant date | Sep 21, 1976 |
| Priority date | — |
| Expiry date | Apr 1, 1995 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65D47/24
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A self-closing closure comprises two annular parts intended to be snapped together one of said parts being integral with a conical diaphragm having a central sleeve-shaped part with a discharge opening whereas the other one has radial spokes ending in a central part from which a stem projects. The end of said stem normally fills the opening of the sleeve and, to obtain an improved discharge function the end of the stem is substantially cylindrical and continues in a slightly conical part whereas the discharge opening has a cylindrical end portion smoothly continuing inwardly in a conical portion the inner envelope surface of the discharge opening being convex to establish a linear contact with the conical part of the stem. The end portion of the stem may be tubular.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.