Fluid delivery system and method
US6932114B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 24, 2003 |
| Grant date | Aug 23, 2005 |
| Priority date | — |
| Expiry date | Feb 24, 2023 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/212
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A fluid delivery system capable of delivering a precise amount of fluid and monitor certain properties of the fluid so that the correct fluid is safely delivered to its intended destination. The system makes use of a flow sensor comprising a freestanding tube portion vibrated at a resonant frequency, wherein the resonant frequency corresponds to the density of the fluid flowing through the tube portion and the tube portion exhibits a degree of twist that varies with the mass flow rate of the fluid flowing therethrough. Movement of the tube portion is then sensed to produce a first output signal corresponding to the fluid density and a second output signal corresponding to the mass flow rate. The system is also equipped to measure elapsed time and to stop fluid flow in response to either of the first and second output signals.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.