Centrifugally loaded self-sealing integral one-piece cap/closure
US5855289A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 25, 1997 |
| Grant date | Jan 5, 1999 |
| Priority date | — |
| Expiry date | Apr 25, 2017 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB04B2005/0435
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A capping and sealing assembly for a sample-holding centrifuge container which features a self-sealing lid that forms a fluid-tight seal in an opening of the canister with a predetermined amount of force, with the force being dependent upon the centrifugal load to which the capping assembly is subjected. The lid includes a cover portion and a peripheral member surrounding the cover portion and extending transverse thereto. The lid is disposed within an open end of the container, with the peripheral member having a frusto-conical surface that faces the container's wall. A gasket is disposed about the frusto-conical surface, forming a fluid-tight and air-tight seal with the cylindrical wall. A plurality of arcuate ribs extend across the cover portion, between opposed areas of the peripheral member. Each of the ribs are adapted to flex, under centrifugal force, expanding the opposed areas outwardly. In this manner, the sealing force between the peripheral member and the wall is increased.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.