# US 7,743,459 B2 · Floor washing-drying machine

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- Number: US 7,743,459 B2
- Document ID: US7743459B2
- Status: Granted
- Kind: B2
- Application number: 12/318,100
- Filed: 2008-12-22
- Published: 2009-07-30
- Granted: 2010-06-29
- Earliest claimed: 2008-01-30
- Assignees: Nilfisk-Advance, Inc.
- Inventors: Sergio Coccapani; Andrea Chignoli
- Web page: https://patentgrep.com/patent/US7743459B2

## CPC

- A47L 11/30: by suction
- A47L 11/4044: {Vacuuming or pick-up tools; Squeegees}
- A47L 11/4077: {Skirts or splash guards}
- 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 floor washing-drying machine includes a brush (2) adapted to scrub a floor (4) with a cleaning liquid in view of removing soil and dirt therefrom, and a wiping device (3) adapted to scrape the floor (4) in order to remove the dirty cleaning liquid therefrom. The wiping device (3) includes a front flap (5) and a rear flap (6) adapted to elastically and slidably engage the floor (4) so as to define a suction chamber (7) therebetween, with the suction chamber being fluidly connected with a suction device (8). A further elastic flap (10) is mounted to the wiping device behind the rear flap, and the width of the further flap is smaller than the width of the front and rear flaps (5, 6).

## Claims

### Claim 1

A floor washing-drying machine, comprising:
a brush adapted to scrub a floor with a cleaning liquid so as to remove soil and dirt therefrom; and
a wiping device adapted to scrape the floor in order to remove dirty cleaning liquid therefrom, said wiping device comprising a front flap and a rear flap adapted to elastically and slidably engage the floor so as to define a suction chamber therebetween, said suction chamber being fluidly connected with a suction device, said wiping device also comprising a further elastic flap arranged behind said rear flap and mounted on a support that is firmly joined to said wiping device, wherein a width of said further elastic flap is smaller than a width of said front and rear flaps, and wherein said further elastic flap is oriented obliquely relative to a forward moving direction of the machine.

### Claim 2 (depends on 1)

A floor washing-drying machine according to claim 1, wherein said further elastic flap forms a screen guarding a machine driver against splashes of detergent liquid.

### Claim 3

A floor washing-drying machine, comprising:
a brush adapted to scrub a floor with a cleaning liquid so as to remove soil and dirt therefrom; and
a wiping device adapted to scrape the floor in order to remove dirty cleaning liquid therefrom, said wiping device comprising a front flap and a rear flap adapted to elastically and slidably engage the floor so as to define a suction chamber therebetween, said suction chamber being fluidly connected with a suction device, said wiping device also comprising a further elastic flap mounted to said wiping device and arranged behind said rear flap at a distance from said rear flap so as to spread a residual liquid into a film behind the machine, wherein a width of said further elastic flap is smaller than a width of said front and rear flaps,
wherein said further elastic flap is mounted on a support that is firmly joined to said wiping device, and said further elastic flap is oriented obliquely relative to a forward moving direction of the machine.

### Claim 4 (depends on 3)

A floor washing-drying machine according to claim 3, wherein said further elastic flap forms a screen guarding a machine driver against splashes of detergent liquid.