Cannula pierceable, self-sealing closure
US4187952A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 13, 1978 |
| Grant date | Feb 12, 1980 |
| Priority date | — |
| Expiry date | Sep 13, 1998 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2005/3123
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
The disclosure is of a novel closure for air evacuated tubular containers and comprises a tubular body having flexible, elastic sidewalls, an open end, a closed end formed by a cannula-pierceable, flexible, elastic end wall having a concavo-convex configuration in cross-section and a flange disposed radially about the periphery of the open end. The novel closure structure takes advantage of the vacuum force in the container to maintain a gas-proof, hermetic seal, reduces the thickness required of the closure to maintain the hermetic seal and is easier to assemble in an air evacuated container. The disclosure is also of a novel method of assembling the closure of the invention in an air evacuated tubular container.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.