Patent Number: 8,820,177

Title: Flow measurement unit

Abstract: A flow measurement unit for measuring a rate of airflow for a ventilation system. The flow measurement unit includes a flow measurement device installed in a housing. A first and a second pressure gauge are provided anteriorly and posteriorly, respectively, to the flow measurement device. The first and the second pressure gauge are configured to provide a first pressure reading, corresponding to the first pressure, and a second pressure reading, corresponding to the second pressure of airflow. Further, the flow measurement unit includes a fan to adjust airflow, such that the second pressure approaches the first pressure of airflow.

Inventors: Morris; Gerald R. (Elmwood, IL), Spurgeon; Daniel A. (Washington, IL)

Assignee: Caterpillar Inc.

International Classification: G01F 1/34 (20060101)

Expiration Date: 9/02/12018