Airflow detection apparatus

Details Airflow detection apparatus Airflow detection apparatus

2008-03-12

2009-12-29

Thompson, Jewel (Department: 2855)

Measuring and testing

Volume or rate of flow

Using rotating member with particular electrical output or...

Reexamination Certificate

active

07637173

ABSTRACT:
An airflow detection apparatus includes an enclosure defining a through hole therein, a conductive pole received in the through hole of the enclosure, a first conductive board electrically connected to a first end of the conductive pole and an electrode of a power source, and a second conductive board electrically connected to the other electrode of the power source. The first and second conductive boards are respectively attached to a top end and a bottom plate of the enclosure. The second conductive board defines a through hole therein to make an end of the conductive pole to pass therethrough, and a diameter of the through hole of the second conductive board is greater than that of the conductive pole. When the conductive pole is driven by an airflow, it will swing to contact with a side bounding the through hole of the second conductive board.

REFERENCES:
patent: 5392657 (1995-02-01), Feller
patent: 6945125 (2005-09-01), Vanderah et al.
patent: 7007557 (2006-03-01), Richard

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