Patent ID: 8256305
Filing Date: 2012-09-04
Classification: G01F,H05K,Y10T

Abstract:
1. An air pressure differential sensing system comprising: a conduit defining an air passage through which air flows upon application of an air pressure differential across different regions of the air passage; a flap pivotally connected within the conduit, the flap being configured to move about a pivotal axis in response to the air flowing through the air passage; and a sensing device mounted proximate to the air passage and separate from the flap, the sensing device being configured to sense an angular position of the flap about the pivotal axis, the angular position of the flap being a function of the air pressure differential, wherein the air passage of the conduit is in fluid communication with an air containment zone and an ambient air zone, the air containment zone and the ambient air zone being otherwise substantially isolated from each other.