Fluid flow monitor
US7775126B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 22, 2008 |
| Grant date | Aug 17, 2010 |
| Priority date | — |
| Expiry date | Feb 20, 2029 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2205/332
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A differential force sensor method and apparatus for automatically monitoring manual injections through an intravenous line. The differential force sensor includes two piezoresistive sense die that are packaged in close proximity utilizing a number of packaging processes. The two piezoresistive sense die can be utilized to measure forces exerted on a diaphragm on either side of an orifice. The piezoresistive sense die can be packaged in close proximity to make intimate contact with the diaphragms on either side of the orifice. The differential force sensor further includes two plungers that make intimate contact with the diaphragm and transfer the force into the piezo-resistive sense dies. Additionally, one or more ASICs and microcontrollers can be utilized to provide thermal calibration and differential calculation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.