Furnace filter assembly
OwnerJoseph L. Najminventor
Life of this patent
Estimating the term…
Abstract
A furnace filter assembly for removing dirt and contamination from air entering an existing furnace is installable on the existing furnace without the need for modification thereof, and includes a filter frame, a supply roll for supporting a continuous length of bulk filter media, a take-up roll for receiving the filter media as it is advanced from the supply roll across the filter frame, a motor for rotating the take-up roll for advancing the filter media, all of which components are mounted on the filter frame. The assembly further includes a motor control system having a pressure sensor, a timer, and a switch in electrical communication with a controller for energizing and de-enegizing the motor in response to conditions of the filter media.
Claims38
A furnace filter assembly comprising:
- a filter frame having a top, a bottom, a front, a back, a first end, and a second end;
- a supply roll having top and bottom ends on said filter frame for supporting filter media;
- a top supply roll end plate and a bottom supply roll end plate extending radially outwardly at said top and bottom ends of said supply roll, respectively;
- a take-up roll with top and bottom ends on said filter frame for receiving filter media from said supply roll;
- a top take-up roll end plate and a bottom take-up roll end plate extending radially outwardly at said top and bottom ends of said take-up roll, respectively;
- filter media on said supply roll extending from said supply roll and through said filter frame between said front and said back to said take-up roll;
- a motor on said frame driveably connected to said take-up roll for advancing said filter media from said supply roll to said take-up roll;
- and
- a top roll mounting assembly and a bottom roll mounting assembly at said top and said bottom of said filter frame, respectively, at said first end, said supply roll being rotatably supported on said filter frame between said top roll mounting assembly and said bottom roll mounting assembly at said first end.
A furnace filter kit for installation on an existing furnace comprising:
- a filter frame having a front, a back, a top, a bottom, a first end, and a second end;
- a supply roll with top and bottom ends for supporting a length of filter media;
- a first top roll end plate and a first bottom roll end plate extending radially outwardly at said top and bottom ends of said supply roll, respectively;
- a take-up roll with top and bottom ends for receiving said filter media;
- a second top roll end plate and a second bottom roll end plate extending radially outwardly at said top and bottom ends of said take-up roll, respectively;
- a motor driveably connected to said take-up roll;
- and
- a top roll mounting plate and a bottom roll mounting plate extending outwardly of said top and said bottom of said filter frame, respectively, at one of said first end and said second end.
A furnace filter assembly for use on a furnace having an air intake duct with a top wall, a bottom wall, and a pair of spaced apart side walls extending therebetween, said side walls having opposing slots extending between said top wall and said bottom wall, said furnace filter assembly comprising:
- a filter frame having a front, a back, a top, a bottom, a first end and a second end, said filter frame being receivable in the slots of a furnace duct for said top of said filter frame to be adjacent the top wall of the duct, said bottom of said filter frame to be adjacent the bottom wall of the duct, and for each of the first and second ends to be outwardly adjacent a different one of the slots in the duct;
- a supply roll having a top, a bottom, and an end plate at each of said top and said bottom of said supply roll, each of said supply roll end plates including a cylindrical hub having an axis, a bearing boss coaxial with said hub, and a cylindrical stub shaft extending coaxially from said bearing boss, said supply roll being rotatably supported on one end of said frame for supporting a supply of filter media;
- a take-up roll having a top, a bottom, and an end plate on each of said top and said bottom of said take-up roll, each of said take-up roll end plates including a cylindrical hub with an axis, a bearing boss coaxial with said hub, and a cylindrical stub shaft extending coaxially from said bearing boss, said take-up roll being rotatably supported on one end of said frame for receiving filter media from said supply roll;
- filter media extending from said supply roll through said filter frame between said front and said back to said take-up roll;
- a motor driveably connected to said take-up roll;
- an electrical control system having a power supply for driving said motor, signal generator means for providing a motor control signal, and a controller responsive to said control signal connecting said motor to said power supply for advancing said filter media;
- a top roll mounting plate and a bottom roll mounting plate on said top and said bottom of said filter frame, respectively, at said first end for mounting said supply roll to said filter frame;
- said top and bottom roll mounting plates being adapted to flex axially away from each other to release one of said rolls therebetween and to facilitate mounting one of said rolls therebetween.
A method of installing a furnace filter assembly having at least two flexible roll mounting plates on an existing furnace intake duct having opposing duct walls and slots in the duct walls, comprising the steps of:
- mounting a supply roll having end plates on the top and bottom ends and a length of filter media wound thereon between two of said mounting plates on said filter frame;
- feeding said filter media from said supply roll, through said filter frame, and to a take-up roll having end plates on the top and bottom ends;
- inserting said filter frame with said supply roll, take-up roll, and said filter media into said slots in the furnace intake duct;
- and
- connecting an electrical control system for said assembly to a power supply.
Dependencies are inferred from the claim text.