# US 9,775,478 B2 · Low profile filter for vacuum cleaners

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- Number: US 9,775,478 B2
- Document ID: US9775478B2
- Status: Granted
- Kind: B2
- Application number: 14/454,758
- Filed: 2014-08-08
- Published: 2016-02-11
- Granted: 2017-10-03
- Earliest claimed: 2014-08-08
- Assignees: Emerson Electric Co.
- Applicants: Douglas Schultz
- Inventors: Douglas Schultz
- Web page: https://patentgrep.com/patent/US9775478B2

## CPC

- A47L 9/12: Dry filters
- A47L 5/365: {of the vertical type, e.g. tank or bucket type}
- A47L: DOMESTIC WASHING OR CLEANING (brushes A46B; cleaning quantities of bottles or of other hollow articles of one kind B08B9/00; laundry D06F); SUCTION CLEANERS IN GENERAL (cleaning in general B08)

## Abstract

A vacuum cleaner having a power head, a collection drum, and a filter. The filter of the present invention is of rectangular cross section about the vertical axis, but is curved away from the power head under the blower along at least one horizontal axis.

## Claims

### Claim 1

A vacuum cleaner comprising:
a power head including—
a blower to induce airflow through the vacuum cleaner and thereby lift and entrain debris for capture within the vacuum cleaner, and
a motor to drive the blower;
a debris container to collect the debris; and
a filter comprising filter media that is adjacent the power head along at least two edges of the filter media and spaced from the power head at a center of the filter media, the filter including a frame having a rectangular horizontal cross section and defining a horizontal X and a perpendicular horizontal Y axis, wherein the filter media is supported by the frame and is linear along the X axis and arcuate along the Y axis.

### Claim 2 (depends on 1)

The vacuum cleaner of claim 1, wherein the filter is positioned within the debris collection drum such that a middle portion of the filter is lower in the drum than first and second opposing edge portions of the filter.

### Claim 3 (depends on 1)

The vacuum cleaner of claim 1, wherein the filter is positioned such that a middle portion of the filter is further from the blower than first and second opposing edge portions of the filter.

### Claim 4 (depends on 1)

The vacuum cleaner of claim 1, wherein the filter media is pleated.

### Claim 5 (depends on 1)

The vacuum cleaner of claim 1, wherein the filter media is curved along at least one horizontal axis.

### Claim 6 (depends on 1)

The vacuum cleaner of claim 1, wherein the filter media is paper.

### Claim 7

A vacuum cleaner comprising:
a power head including—
a blower to induce airflow through the vacuum cleaner and thereby lift and entrain debris for capture within the vacuum cleaner, and
a motor to drive the blower;
a debris collection drum positioned below the power head; and
a filter positioned below the blower, the filter including filter media that is curved along at least one horizontal axis, such that a middle portion of the filter media is further from the blower than first and second opposing edge portions of the filter media, the filter including a frame having a rectangular horizontal cross section and defining a horizontal X and a perpendicular horizontal Y axis, wherein the filter media is supported by the frame and is linear along the X axis and arcuate along the Y axis.

### Claim 8 (depends on 7)

The vacuum cleaner of claim 7, wherein the filter is within the debris collection drum such that the middle portion of the filter is lower in the drum than the first and second opposing edge portions of the filter.

### Claim 9 (depends on 7)

The vacuum cleaner of claim 7, wherein the filter media is pleated.

### Claim 10 (depends on 7)

The vacuum cleaner of claim 7, wherein the filter media is paper.

### Claim 11

A vacuum cleaner comprising:
a power head including—
a blower to induce airflow through the vacuum cleaner and thereby lift and entrain debris for capture within the vacuum cleaner, and
a motor to drive the blower;
a debris collection drum positioned below the power head; and
a filter positioned below the blower, such that a middle portion of the filter is further from the power head than first and second opposing edge portions of the filter, the filter including a frame having a rectangular horizontal cross section and defining a horizontal X and a perpendicular horizontal Y axis, wherein the filter media is supported by the frame and is linear along the X axis and arcuate along the Y axis.

### Claim 12 (depends on 11)

The vacuum cleaner of claim 11, wherein the filter media is pleated.

### Claim 13 (depends on 11)

The vacuum cleaner of claim 11, wherein the filter is within the debris collection drum such that a middle portion of the filter is lower in the drum than first and second opposing edge portions of the filter.

### Claim 14 (depends on 11)

The vacuum cleaner of claim 11, wherein the filter media is paper.