Fluid displacement
US4193398A · kind A · utility
17Cited by
7References
12Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 25, 1978 |
| Grant date | Mar 18, 1980 |
| Priority date | — |
| Expiry date | May 25, 1998 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2005/14513
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An extracorporeal osmotic pump has a first chamber containing an osmotic fluid e.g. aqueous polyethylene glycol solution and a second chamber containing a weaker solution or solvent e.g. water. Between the two there is a duct containing the semipermeable membrane and nearer the first chamber one or more layers of porous material (e.g. four contiguous face-to-face discs of porous polyethylene) as a flow-control means.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.