Back to results
US 12,105,004 B2Granted
Airflow filter sensor
OwnerSteve Perezinventor
Life of this patent
Estimating the term…
Abstract
An air flow sensor for use with an air filter comprises a tubular housing with a flap that is opened by air pressure, the extent of opening increasing as the surrounding air filter becomes clogged. A terminal on the flap contacts different measurement terminals on the housing, closing individual circuits connected to an indicator, whereby a display shows when the filter is clear and when it is clogged.
Claims18
An air filter flow sensor for determining the effectiveness of an operating air filter, comprising
- a tubular housing inserted through a portion of the air filter;
- a pivotably mounted flap blocking air flow through the tubular housing, which opens in the direction of air flow as pressure builds behind the flap;
- a flap terminal at the base of the flap, wired to a power source;
- and
- a plurality of measurement terminals located on an inside surface of the tubular housing and positioned so the flap terminal will contact them as the flap opens and closes,
- wherein each measurement terminal is connected to a circuit that produces a signal when contacted by the flap terminal and the measurement terminals are spaced such that contact therewith indicates a predetermined condition of airflow through the filter.
3 more elements
An air flow sensor for installing on an aperture in an existing air filter, comprising
- a tubular housing;
- a pivotably mounted flap blocking air flow through the tubular housing, which opens in the direction of air flow as pressure builds behind the flap;
- a flap terminal at the base of the flap, wired to a power source;
- and
- a plurality of measurement terminals located on an inside surface of the tubular housing and positioned so the flap terminal will contact them as the flap opens and closes, wherein each measurement terminal is connected to a circuit that produces a signal when contacted by the flap terminal and the measurement terminals are spaced such that contact therewith indicates a predetermined condition of airflow through the filter.
2 more elements
Dependencies are inferred from the claim text.