# US 9,516,985 B2 · Floor washing-drying machine with a scraping device

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- Number: US 9,516,985 B2
- Document ID: US9516985B2
- Status: Granted
- Kind: B2
- Application number: 14/761,159
- Filed: 2013-12-12
- Published: 2015-12-17
- Granted: 2016-12-13
- Earliest claimed: 2013-02-15
- Assignees: Nilfisk A/S
- Applicants: Nilfisk A/S
- Inventors: Andrea Chignoli; Andrea Odoli
- Web page: https://patentgrep.com/patent/US9516985B2

## CPC

- A47L 11/4044: {Vacuuming or pick-up tools; Squeegees}
- A47L 11/30: by suction
- A47L 11/305: {the tools being disc brushes}
- 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 washing-drying machine including a scraping device including a reversible fastening system of scraping blades. The reversible fastening system makes it possible to apply the scraping blades to the scraping device in a simple and safe way and as simply to remove them to clean them or replace them when worn out through a flexible fastening mechanism including holes for engaging with support elements provided on the scraping device, and including at least an elastic end portion with a slot for engaging with the undercut of a corresponding locking element, formed in the proximity of end portions of the support.

## Claims

### Claim 1

A floor washing drying machine comprising:
a scraping device including a curved support on which at least one perforated scraping blade is mounted in a reversible manner by support elements and therein reversibly blocked by fastening means,
wherein the fastening means comprises at least a flexible belt including holes to engage with the support elements, and including at least an elastic end portion bearing a slot to engage with a corresponding fastening element formed close to end portions of the support.

### Claim 2 (depends on 1)

A floor washing drying machine according to claim 1, wherein the at least one the flexible fastening belt of the at least one blade includes a strip of hard plastic material ending on both sides with the elastic end portion.

### Claim 3 (depends on 2)

A floor washing drying machine according to claim 2, wherein the elastic end portion is shaped as an elastically compressible serpentine followed, toward an outer edge, by the slot for snap-engaging with an undercut of the fastening element.

### Claim 4 (depends on 1)

A floor washing drying machine according to claim 1, wherein the at least one belt acts as a fastening device to fasten the blade on a first concave surface of the support of the scraping device.

### Claim 5 (depends on 1)

A floor washing drying machine according to claim 1, wherein the at least one flexible fastening belt of the blade includes a strip of elastomeric material.

### Claim 6 (depends on 5)

A floor washing drying machine according to claim 5, wherein the holes of the at least one belt for engagement with the support elements have a distance between each other shorter than that of the support elements and the slot elastically engages with an undercut of the fastening element.

### Claim 7 (depends on 5)

A floor washing drying machine according to claim 5, wherein a terminal section of the belt comprises gripping elements.

### Claim 8 (depends on 2)

A floor washing drying machine according to claim 2, wherein the at least one belt acts as a fastening means for the blade on a second convex surface of the support of the scraping device.

### Claim 9 (depends on 1)

A floor washing drying machine according to claim 1, wherein the scraping device comprises a first concave surface on which a first blade is mounted for collecting dirt washing liquid, the first blade being fastened by a first belt, and a second convex surface on which a second blade is mounted to dry the dirt washing liquid, the second blade being fastened by a second belt.

### Claim 10 (depends on 1)

A floor washing drying machine according to claim 1, wherein the support elements have a mushroom shape.