US 11,815,378 B2
Airflow sensor and system
Paresh Davé, Santa Rosa, CA (US); Matthew Maragos, Rohnert Park, CA (US); and William J. Sell, Petaluma, CA (US)
Assigned to ONICON INC., Largo, FL (US)
Filed by ONICON INC., Largo, FL (US)
Filed on Jan. 8, 2021, as Appl. No. 17/144,577.
Application 17/144,577 is a continuation of application No. 16/510,291, filed on Jul. 12, 2019, granted, now 10,908,004.
Claims priority of provisional application 62/697,675, filed on Jul. 13, 2018.
Prior Publication US 2021/0131842 A1, May 6, 2021
Int. Cl. G01F 1/40 (2006.01); G01F 15/12 (2006.01)
CPC G01F 1/40 (2013.01) [G01F 15/125 (2013.01)] 22 Claims
OG exemplary drawing
 
1. A device for sensing an airflow in a duct through a fixed resistance, the device comprising:
a housing mounted to a mounting plate, the mounting plate being mounted to a-the fixed resistance extending across the airflow of the duct, the fixed resistance having fixed airflow resistance;
a first static pressure tube having a first opening as a first outlet connected to the housing and a second opening as a first inlet on an upstream side of the fixed resistance, wherein the first static pressure tube defines a flow path to sense a static pressure of the airflow incident on the fixed resistance from the first outlet; and
a second static pressure tube having a first opening as a second outlet connected to the housing and the second static pressure tube is adapted to extend through the fixed resistance to a second opening as a second inlet on a downstream side of the fixed resistance,
wherein the housing is adapted to be mounted to the upstream side of the fixed resistance and the device is adapted to be in communication with a transmitter and/or a controller for communicating pressure readings from the first outlet and the second outlet to the transmitter and/or controller.