Pressure diaphragm for a medication infusion system
US4856340A · kind A · utility
257Cited by
2References
17Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 1, 1987 |
| Grant date | Aug 15, 1989 |
| Priority date | — |
| Expiry date | Dec 1, 2007 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M5/16831
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A pressure diaphragm installed in a disposable cassette for use on a main pump unit is disclosed which allows pressure downstream of a fluid pump to be measured with a high degree of accuracy. The pressure diaphragm is located over a raised cylindrical pressure plateau, and is spaced away from the plateau on the top and on the sides thereof to allow for a free movement of the pressure diaphragm. Fluid flow is from one side of the pressure plateau to the opposite side, with fluid flowing between the pressure diaphragm and the top and sides of the pressure plateau, as well as through a channel disposed in the pressure plateau.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.