Air flow volume measuring apparatus

Measuring and testing – Volume or rate of flow – Proportional

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Details

7386166, 7386176, G01F 500

Patent

active

045480761

ABSTRACT:
An improved selector provides for air paths between a meter and an air volume sensing manifold that are similar for both up and down flow of air through the apparatus thereof. This provides similar momentum losses in the air reaching the meter for both air up and down flow through the apparatus to obtain more accurate meter readings of the air flow volume. Separate throttling screws are provided for the throttling orifices, providing different range selections, and are independently adjusted to compensate for minor air passage differences in the selector, and air flow pattern differences in up and down flow. A calibrated area reducer in the form of a sheet of perforated stock is positioned upstream in the throat in contact with the manifold to extend the measuring range of the apparatus while minimally disturbing the air flow patterns through the apparatus.

REFERENCES:
patent: 1753552 (1930-04-01), Cornell
patent: 2060848 (1936-11-01), Boyle
patent: 2207747 (1940-07-01), Manarik et al.
patent: 3242730 (1966-03-01), Peltola
patent: 3355946 (1967-12-01), Lazell
patent: 3463003 (1969-08-01), Pierman et al.
patent: 4030358 (1977-06-01), Noll
patent: 4343195 (1982-08-01), Victor et al.
patent: 4481829 (1984-11-01), Shortridge

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