Accelerated testing method of silicone drainage in syringes
US10627377B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 11, 2018 |
| Grant date | Apr 21, 2020 |
| Priority date | — |
| Expiry date | Oct 11, 2038 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N33/0078
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A centrifugation approach used to accelerate current empirical methods used to investigate silicone drainage in syringes is disclosed. A siliconized syringe is placed into a holder of a centrifuge in a predefined orientation. Centrifugation of the syringe is activated at a predetermined G rate and for a period of intended simulation time and is ended as that time elapses. The time can be a function of intended simulation time, acceleration due to gravity, square of centrifuge revolution rate, and distance from center of rotor hub to matching point on the syringe barrel. One or more injection functionality parameters of the syringe is assessed after the elapsed period of time. A bucket fixture for retaining one or more syringes in the predefined orientation is also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.