Cell culture pumping system
US4417861A · kind A · utility
37Cited by
11References
5Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 24, 1981 |
| Grant date | Nov 29, 1983 |
| Priority date | — |
| Expiry date | Dec 24, 2001 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/7921
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A low trauma, reversible flow pumping system is disclosed which is useful for transfer of biological fluids containing fragile components such as cells. The pumping system comprises a length of collapsible and flexible tubing in fluid communication at each end with a two-way, gravity actuated check valve means having a self-centering, vertically slidable weight member for directional regulation of fluid flow. Said tubing is sealingly enclosed within a hydraulic fluid containing chamber which is in fluid communication with oscillatory pressure providing means to cause alternate expansion and contraction of said tubing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.