# US 2023/0054083 A1 · Industrial sweeper provided with an improved device for unclogging the air filter thereof

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 2023/0054083 A1
- Document ID: US20230054083A1
- Status: Published application
- Kind: A1
- Application number: 17/895,795
- Filed: 2022-08-25
- Published: 2023-02-23
- Earliest claimed: 2021-07-16
- Assignees: Etablissements Emily
- Applicants: Etablissements Emily
- Inventors: Michel GUENGANT; Michel MORVAN; Arnaud MIOSSEC
- Web page: https://patentgrep.com/patent/US20230054083A1

## CPC

- A47L 9/20: Means for cleaning filters
- E01H 1/047: {Collecting apparatus characterised by the hopper or by means for unloading the hopper}
- A47L 5/22: with rotary fans
- A47L 9/009: {Carrying-vehicles; Arrangements of trollies or wheels; Means for avoiding mechanical obstacles}
- A47L 9/0416: {driven by fluid pressure, e.g. by means of an air turbine}
- A47L 9/0472: {Discs}
- A47L 9/1409: {Rigid filtering receptacles (dust collecting receptacles for cyclones A47L9/1683)}
- A47L 9/149: {Emptying means; Reusable bags}
- B01D 46/0006: {Filter elements or cartridges installed in a drawer-like manner}
- B01D 46/74: by forces created by movement of the filter element
- E01H 1/0845: {with mechanical loosening or feeding instruments for the dirt to be sucked- up, e.g. brushes, scrapers (brushing installations per se E01H1/02; other loosening devices per se E01H1/105)}
- B01D 2271/02: Gaskets, sealings
- 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)
- E01H: STREET CLEANING; CLEANING OF PERMANENT WAYS; CLEANING BEACHES; DISPERSING {OR PREVENTING} FOG IN GENERAL {CLEANING STREET OR RAILWAY FURNITURE OR TUNNEL WALLS}(cleaning in general B08B)
- 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

An industrial sweeper operates by rolling along a floor to be cleaned, pushed or pulled, including: a brush with a horizontal axis depending on the use position of the industrial sweeper on a horizontal floor, a collecting pan for collecting dirt swept by the brush, the collecting pan mounted and able to pivot between a closed and working position and a wide open position allowing the pan to be emptied, a suction turbine downstream of the collecting pan suctioning dust into the collecting pan when in closed position, two wheels for resting on the floor, an air filter, an unclogging mechanism for unclogging the air filter. The air filter is fixed on the collecting pan and the unclogging mechanism includes an end stop to block travel of the collecting pan in its wide open position, the end stop causing a shock at the end of the collecting pan opening movement.

## Claims

### Claim 1

An industrial sweeper designed to operate by rolling along a floor that is to be cleaned, pushed or pulled, comprising:
a brush with an axis that is horizontal when considering the position of use of the industrial sweeper on a horizontal floor,
a collecting pan intended to collect the dirt swept by the brush during operation of the industrial sweeper, the collecting pan being mounted with the ability to pivot about an articulation that is offset laterally from the centre of gravity of the collecting pan between a closed and working position of the industrial sweeper and a wide open position allowing the collecting pan to be emptied,
a suction turbine situated downstream of the collecting pan to encourage, by suction, the dust to enter the collecting pan when it is in its closed position,
two wheels intended to rest on the floor that is to be cleaned,
an air filter, fixed to the collecting pan, and
an unclogging mechanism for unclogging the air filter,
comprising an end stop designed to block the travel of the collecting pan in its wide open position, the end stop causing a shock at the end of the opening movement of the collecting pan,
wherein the passage from the closed position to the wide open position occurs under the effect of gravity.

### Claim 2 (depends on 1)

The industrial sweeper according to claim 1, wherein the collecting pan comprises a box of L-shaped cross section, provided with a dust and dirt intake opening, with an air outlet opening, the air filter being fixed around the air outlet opening and wherein, in the open position, the collecting pan is emptied through the intake opening.

### Claim 3 (depends on 2)

The industrial sweeper according to claim 2, wherein two guideways for guiding the air filter are positioned opposite one another while being fixed to two transverse edges delimiting the air outlet opening, the air filter having a geometry in the shape of a parallelepiped or prism, the air filter being inserted between the two guideways.

### Claim 4 (depends on 2)

The industrial sweeper according to claim 2, wherein the air filter is delimited by two open main faces uncovering the filter element, one of them being a lower face, for admitting air, and the other and upper face for letting filtered air out, two seals being fixed to the perimeter of the two main faces of the air filter, the air filter being fixed around the air outlet opening, via an applicator comprising a frame or a ring mounted in an articulated manner and able to bear against the perimeter seal of the upper face of the air filter.

### Claim 5 (depends on 1)

The industrial sweeper according to claim 1, wherein the end stop comprises a slider mounted in an articulated manner via one end to the collecting pan by means of an axis common with the collecting pan, the slider having passing through it a slot able to slide along a second axis secured to a chassis that forms part of the sweeper, the slot comprising a long part and the free end of which defines, in collaboration with the second axis, the end stop that determines the wide open position of the collecting pan.

### Claim 6 (depends on 5)

The industrial sweeper according to claim 5, wherein the long part of the slot is extended in the bottom part of this slot by a short part which extends upwards, the end of the short part of the slot defining, with its engagement on the second axis such as a lock, the closed position of the box.

### Claim 7 (depends on 1)

The industrial sweeper according to claim 1, wherein the unclogging mechanism comprises a cable one end of which is fixed to a chassis which forms part of the industrial sweeper and the other end of which is fixed to an axis common with the collecting pan, the taut cable forming an end stop for the opening movement of the collecting pan and thus determining the wide open position thereof, and wherein the industrial sweeper is equipped with a lock for automatically blocking the collecting pan when it is returned to its closed position, the lock including a retractable lock bolt.

### Claim 8 (depends on 1)

The industrial sweeper according to claim 1, wherein the unclogging mechanism comprises a radial end stop borne by a shaft constituting the articulation, a fixed second end stop borne by a chassis that forms part of the industrial sweeper and that collaborates with the radial end stop in order to limit the rotation of the collecting pan about the articulation to its wide open position.

### Claim 9 (depends on 1)

The industrial sweeper according to claim 1, wherein it comprises two hydraulic pumps respectively rotationally driven by the two main wheels of the industrial sweeper, three hydraulic motors coupled in series and supplied by the two hydraulic pumps to respectively drive the rotation of the horizontal-axis brush, a lateral brush and the suction turbine.