Brushing – scrubbing – and general cleaning – Machines – With air blast or suction
Reexamination Certificate
2007-05-01
2007-05-01
Snider, Theresa T. (Department: 1744)
Brushing, scrubbing, and general cleaning
Machines
With air blast or suction
C015S319000, C073S202500, C073S204250
Reexamination Certificate
active
10823181
ABSTRACT:
An airflow sensor system for monitoring air inlet airflow and air outlet airflow of a vacuum cleaner is provided according to an embodiment of the invention. The airflow sensor system includes a vacuum cleaner air duct, a bypass tube connected to the air duct, and an airflow sensor positioned at least partially in the bypass tube. The airflow sensor is configured to generate a normal voltage differential range when the bypass tube airflow is within a predetermined normal airflow range, configured to generate an input blockage voltage differential range when the bypass tube airflow is greater than the predetermined normal airflow range, and further configured to generate an output blockage voltage differential range when the bypass tube airflow is less than the predetermined normal airflow range.
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Solid State Airflow Sensor [online], [retrieved on Oct. 14, 2003]. Retrieved from the Warren G-V, A Dielectric Communications Company, website using the Internet <URL: http://www.dielectric.com/warrengv/prod—saf.html>.
Oreck Holdings LLC
The Ollila Law Group LLC
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