Combination stopper-shield closure
US5494170A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 6, 1993 |
| Grant date | Feb 27, 1996 |
| Priority date | — |
| Expiry date | May 6, 2013 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B5/150572
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A combination stopper and shield closure for sealing the open end of an evacuated body fluid collection tube to retain the vacuum therein. The stopper and shield are made by co-injection molding with the stopper being retained within a central aperture in the shield by means of an upper and lower flange or a plurality of plugs extending from the stopper into the shield. The upper flange has a convex surface for directing residue body fluid away from the center of the flange to reduce contamination, a gas-barrier to increase the vacuum seal and prevent contamination, cam followers in the base of the shield to interact with cams on the surface of the tube to facilitate closure twist-off, and flexible tabs around the base of the shield to prevent the tube/closure assembly from being pushed out of a needle holder during body fluid collection.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.