Pivoting frangible valve for plastic bags
US4586928A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 9, 1984 |
| Grant date | May 6, 1986 |
| Priority date | — |
| Expiry date | Oct 9, 2004 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S604/905
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
Frangible valve for a closed plastic bag system comprising an upper member having a bore and located within a port on a plastic bag and a solid lower member extending into the bag. The lower member is attached to the upper member by at least one tether and includes a bore-sealing portion attached to the upper member via a weakened portion. In use, the bore-sealing portion is separated from the upper member by external manipulation to permit fluid flow through the bore while the bore-sealing portion remains tethered to the valve. In preferred embodiments, two tethers are included on opposite sides of the bore-sealing portion and the tethered bore-sealing portion includes means for keeping it separated from the bore in a fully open position after the bore seal has been broken.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.