Apparatus for detecting when the pressure detector in a fluid line exceeds a prescribed threshold
US4404440A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 15, 1980 |
| Grant date | Sep 13, 1983 |
| Priority date | — |
| Expiry date | Dec 15, 2000 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H35/34
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A pressure detector for particular use in a system for administering parenteral fluid to a human patient. The pressure detector includes a conventional pressure diaphragm having a flexible membrane that is movable in accordance with the pressure of the fluid being administered. The pressure detector further includes a special receptacle for retaining the pressure diaphragm, and a special follower assembly that is moved in a prescribed fashion by installation of the diaphragm in the receptacle and by movement of the diaphragm membrane due to variations in fluid pressure. A pair of electrical contacts are controllably moved together and apart by the follower assembly, to provide an electrical signal whenever the diaphragm is not installed or, if it is installed, whenever the fluid pressure exceeds a prescribed threshold.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.