Positive displacement flushable flow meter
US4953403A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 15, 1989 |
| Grant date | Sep 4, 1990 |
| Priority date | — |
| Expiry date | Mar 15, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01F15/12
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A positive displacement flushable flow meter has sensing elements that are rotated by and at a rate in accordance with a flow of fluid through the flow meter. The flow meter is particularly adapted for measuring the volume flow rate of coating material supplied to spray coating apparatus, and to permit the flow meter to be quickly flushed by means of alternate bursts of relatively high velocity air and solvent, without overdriving the sensing elements and damaging the flow meter, a bypass valve is provided. During a spray coating operation, the bypass valve is closed and all of the coating material flows past and rotates the sensing elements. During a flushing operation, the bypass valve is opened to divert some of the relatively high velocity flow of air and solvent around the sensing elements, while allowing a controlled and limited amount of air and solvent to move past and rotate the elements to clean them without causing them to be overdriven.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.