Fluid flow direction detector

Details Fluid flow direction detector Fluid flow direction detector

1993-09-28

1995-04-25

Peng, John K.

Communications: electrical

Condition responsive indicating system

Specific condition

340606, 116112, 116264, 116273, 200 819R, 307118, 454256, G08B 2100

Patent

active

054102987

ABSTRACT:
An apparatus for detecting the flow direction of a fluid between two enclosed spaces, such as hospital rooms, includes a conduit extending along a horizontal plane and adapted to receive the fluid. A detecting element is disposed within the conduit and movable in the direction of fluid flow, the detecting element being in direct contact with the fluid. A sensing element may be coupled to the conduit for determining when the detecting element reaches a predetermined position within the conduit. The circuitry coupled to the sensing element enables selection of a desired flow direction and actuates an alarm when the detected flow direction is other than the one selected.

REFERENCES:
patent: 3962918 (1976-06-01), Rosaen
patent: 4197809 (1980-04-01), Johnson
patent: 4486744 (1984-12-01), Pratt et al.
patent: 4791254 (1988-12-01), Polverari
patent: 4906807 (1990-03-01), Siebert et al.
patent: 5142271 (1992-08-01), Bailey et al.
patent: 5183983 (1993-02-01), Knop
patent: 5291182 (1994-03-01), Wiseman

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