Container cap with frangible septum
US4545497A · kind A · utility
99Cited by
7References
5Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 16, 1984 |
| Grant date | Oct 8, 1985 |
| Priority date | — |
| Expiry date | Nov 16, 2004 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65D51/002
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A disposable, one-piece cap for a liquid container includes a frangible septum which allows easy penetration by a syringe needle to permit withdrawal of the liquid. The septum includes a plurality of grooves which are thinner than the thickness of the remainder of the septum to facilitate tearing of the septum as the needle penetrates. Such tearing prevents a seal from forming around the needle and thus allows air to enter the container avoiding problems associated with the formation of a partial vacuum within the container as the sample is withdrawn.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.