Flowmeter
US3999432A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 21, 1975 |
| Grant date | Dec 28, 1976 |
| Priority date | — |
| Expiry date | Aug 21, 1995 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01F1/12
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A flowmeter comprises an axial flow measurement turbine having a relatively thin turbine disc secured to a shaft which is supported on at least one axial bearing. At high flow rates, it is possible for a large pressure differential to build up between the opposite axial sides of the disc, subjecting the turbine to an axial force which results in excessive friction at the bearing and therefore reduced life and reduced accuracy. To solve this problem, the disc is provided with apertures passing axially therethrough, and a set of blades is secured to the upstream face of the disc to force fluid to flow through these apertures, and thus substantially eliminate the pressure differential.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.