# US 11,304,579 B2 · Vacuum filter having annular catch

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- Number: US 11,304,579 B2
- Document ID: US11304579B2
- Status: Granted
- Kind: B2
- Application number: 16/434,973
- Filed: 2019-06-07
- Published: 2020-01-23
- Granted: 2022-04-19
- Earliest claimed: 2018-07-17
- Assignees: Shop Vac Corporation
- Applicants: Shop Vac Corporation
- Inventors: Craig A. Seasholtz; Kurt Westbrook; Jason Gottschall
- Web page: https://patentgrep.com/patent/US11304579B2

## CPC

- A47L 9/1683: {Dust collecting chambers; Dust collecting receptacles}
- A47L 5/365: {of the vertical type, e.g. tank or bucket type}
- A47L 7/0028: {Security means, e.g. float valves or level switches for preventing overflow}
- A47L 7/0042: {Gaskets; Sealing means}
- B01D 46/0005: {Mounting of filtering elements within casings, housings or frames (B01D46/2422 takes precedence)}
- B01D 46/001: {Means for connecting filter housings to supports}
- B01D 46/2414: {End caps including additional functions or special forms}
- B01D 46/521: {using folded, pleated material}
- A47L 9/127: {tube- or sleeve-shaped}
- A47L 9/1608: {Cyclonic chamber constructions}
- A47L 9/1675: {movable, revolving or rotary}
- B01D 2265/028: Snap, latch or clip connecting means
- B01D 2279/55: for cleaning appliances, e.g. suction cleaners
- 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)
- B01D: SEPARATION (separating solids from solids by wet methods B03B, B03D; by pneumatic jigs or tables B03B; by other dry methods B07; magnetic or electrostatic separation of solid materials from solid materials or fluids, separation by high-voltage electric fields B03C; centrifuges, vortex apparatus B04; presses per se for squeezing-out liquid from liquid-containing material B30B9/02; treatment of water C02F, e.g. softening by ion-exchange C02F1/42; {arrangements of air intake cleaners in gas turbine plants F02C7/05} ; arrangements or mounting of filters in air-conditioning, air-humidification or ventilation F24F13/28)

## Abstract

A filter for a vacuum cleaner includes a top having an open center, a bottom plate having an outermost edge, a center, an inside surface facing towards the top, an outside surface facing away from the top, and a catch extending from the inside surface annularly around the center, filter material being secured between the top and bottom plate. An adaptor for a filter cage or the filter cage itself includes a radial retention ring that engages the catch of the filter.

## Claims

### Claim 1

A vacuum cleaner, the vacuum cleaner comprising:
a tank including a dirty air inlet;
a motor housing comprising a motor, a filter cage having an end, and a clean air outlet; and
a radial retention ring connected to the end of the filter cage, the end of the filter cage including round surface having an outer circumference and an inner circumference, the radial retention ring extending from the inner circumference of the round surface.

### Claim 2 (depends on 1)

The vacuum cleaner of claim 1, further comprising a filter surrounding the filter cage, the filter having a bottom plate with a catch that engages the radial retention ring.

### Claim 3 (depends on 2)

The vacuum cleaner of claim 2, wherein a mating face of the catch engages a mating end of the radial retention ring.

### Claim 4 (depends on 3)

The vacuum cleaner of claim 3,
wherein the catch has an inclined end;
wherein the radial retention ring has a sliding surface; and
wherein, prior to engagement of the catch with the radial retention ring, the catch flexes via contact between the inclined end of the catch and the sliding surface of the radial retention ring.

### Claim 5 (depends on 1)

The vacuum cleaner of claim 1, wherein the radial retention ring is integral with the end of the filter cage.

### Claim 6

A vacuum cleaner, the vacuum cleaner comprising:
a tank including a dirty air inlet;
a motor housing comprising a motor, a filter cage having an end, and a clean air outlet; and
a radial retention ring provided on an adapter connected to the end of the filter cage,
the adapter including an annular surface having an outer circumference and an inner circumference, the radial retention ring extending from the inner circumference.

### Claim 7 (depends on 6)

The vacuum cleaner of claim 6, further comprising a filter surrounding the filter cage, the filter having a bottom plate with a catch that engages the radial retention ring.

### Claim 8 (depends on 7)

The vacuum cleaner of claim 7, wherein a mating face of the catch engages a mating end of the radial retention ring.

### Claim 9 (depends on 8)

The vacuum cleaner of claim 8,
wherein the catch has an inclined end;
wherein the radial retention ring has an sliding surface; and
wherein, prior to engagement of the catch with the radial retention ring, the catch flexes via contact between the inclined end of the catch and the sliding surface of the radial retention ring.