Mass flow, fluid measuring and dispensing system
US5806716A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 29, 1996 |
| Grant date | Sep 15, 1998 |
| Priority date | — |
| Expiry date | Aug 29, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05D7/0635
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A measuring and dispensing system capable of repeatedly dispensing discrete amounts of fluid having a mass of about 10 g or less and even amounts as small as 1 g. The system includes a pressurized tank for holding a fluid medium such as a liquid pharmaceutical. The tank is coupled in fluid communication to a mass flow sensor. The mass flow sensor is designed to have fluid from the tank flow through it, and measures the mass of the flowing fluid. A controller is coupled in data transmission relation to the mass flow sensor and records each measurement made by the mass flow sensor. A dispenser, such as a flexible tube, is coupled in fluid flowing relation to the mass flow sensor. A valve, such as a pinch valve, is positioned so as to be able to stop flow out of the dispenser. The valve is coupled in data transmission relation to the controller which controls opening and closing of the valve, automatically adjusting the amount of fluid permitted to flow out of the dispenser.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.