Flowmeter for liquids
US4172381A · kind A · utility
Inventor
Key dates
| Filing date | Apr 5, 1978 |
| Grant date | Oct 30, 1979 |
| Priority date | — |
| Expiry date | Apr 5, 1998 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01F1/065
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An improved flowmeter for liquids is provided of the type which includes a housing, a cylindrical chamber formed in the housing, a shaft rotatably mounted in the housing and extending coaxially through the chamber, an impeller mounted on the shaft and an inlet and outlet channel provided in the housing and communicating with the chamber. The impeller is provided with a coaxially disposed circular disc having a plurality of radiation-permeable passageways formed therethrough spaced about the periphery thereof. A radiation source is disposed on the side of the disc and a radiation sensor on the other side of the disc in axial alignment with the passageways thereof. The flowmeter is especially useful for accurately determining relatively low flow rates.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.