Flow rate transducer
US4432244A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 26, 1982 |
| Grant date | Feb 21, 1984 |
| Priority date | — |
| Expiry date | May 26, 2002 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02F2007/0092
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A flow rate transducer has a housing in which a cylindrical fluid chamber and a support portion surrounded by an annular guide groove formed coaxial with the fluid chamber are formed. Rotatably carried by the support portion is a vane wheel having plate pieces arranged circumferentially of the vane wheel at regular intervals and extending in the guide groove. A light emitting element and a light receiving element are disposed to face a locus defined by the rotated plate pieces so that, every time the plate pieces pass by the light receiving element, the light receiving element produces an electrical signal to measure the flow rate of a fluid in the fluid chamber. The support portion has vane wheel speed adjusting chambers each having an L-shaped configuration and opening to said guide groove for minimizing the flow rate measurement errors of the flow rate transducer both in the high and low rate regions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.