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US 6,596,059 B1Granted
Automated filter changing device and method
AssigneeSkyline Products, Inc.
InventorsAllan Clarkson Greist, Robert Charles Stadjuhar, Jr.
Life of this patent
Estimating the term…
Abstract
An automated filter changing device (20) includes a filter reel system (22). A motor (24) is connected to the filter reel system (22). An airflow sensor (26) is in an airflow of the filter reel system (22). A controller (28) is connected to the motor (24) and the airflow sensor (26). The airflow sensor (26) determines when the airflow is below an acceptable threshold. When the airflow is below an acceptable threshold, the controller (28) tells the motor (24) to index the filter reel system (22).
Claims7
An automated filter changing device, comprising:
- a filter reel system having a roll of filter media which has an index along a length, the index having index marks and a hole near one of the index marks, the roll of filter media held by a frame that fits in a plenum of transportation sign;
- a motor connected to the filter reel system;
- an airflow sensor in an airflow of the filter reel system;
- a controller connected to the motor and the airflow sensor;
- and
- a master controller in communication with the controller and receiving a signal indicating that the filter media is near the end of the roll.
3 more elements
Dependencies are inferred from the claim text.