# US 11,306,426 B2 · Household appliance

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- Number: US 11,306,426 B2
- Document ID: US11306426B2
- Status: Granted
- Kind: B2
- Application number: 16/766,107
- Filed: 2018-11-08
- Published: 2020-11-19
- Granted: 2022-04-19
- Earliest claimed: 2017-11-23
- Assignees: Electrolux Appliances Aktiebolag
- Applicants: Electrolux Appliances Aktiebolag
- Inventors: Daniele Da Riol; Dario Braconi; Mauro Cinello; Helena Romito
- Web page: https://patentgrep.com/patent/US11306426B2

## CPC

- D06F 39/02: Devices for adding soap or other washing agents
- D06F: LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES

## Abstract

A household appliance having a retractable drawer arranged in a drawer housing. The drawer has at least one sliding element slideably arranged on at least one guiding element provided on the drawer housing such that the sliding element and the guiding element provide respective contact surfaces for each other, whereby the guiding element and/or the sliding element has, at least in an area, recesses that reduce an area of the respective contact surface.

## Claims

### Claim 1

A household appliance, comprising:
a drawer housing having at least one guiding element; and
a retractable drawer arranged in the drawer housing, the drawer comprising at least one sliding element slideably arranged on the at least one guiding element such that the sliding element and the guiding element provide respective contact surfaces for each other;
wherein the guiding element and/or the sliding element comprises at least in a portion of the respective contact surface a roughness increased by recesses that reduce a size of the respective contact surface.

### Claim 2 (depends on 1)

The household appliance according to claim 1, wherein the recesses (196) are only arranged on the respective guiding element.

### Claim 3 (depends on 1)

The household appliance according to claim 1, wherein the recesses at least partially comprise grooves.

### Claim 4 (depends on 3)

The household appliance according to claim 3, wherein the grooves have a width between 50 μm and 2 mm.

### Claim 5 (depends on 3)

The household appliance according to claim 3, wherein at least a subset of the grooves has a rectangular cross section.

### Claim 6 (depends on 3)

The household appliance according to claim 3, wherein at least a subset of the grooves has a cross section comprising parallel walls ending in a semi-circle.

### Claim 7 (depends on 3)

The household appliance according to claim 3, wherein at least a subset of the grooves has a triangular cross section.

### Claim 8 (depends on 1)

The household appliance according to claim 1, wherein at least some of the grooves comprise grid of micro-pillars.

### Claim 9 (depends on 8)

The household appliance according to claim 8, wherein the micro-pillars comprise at least one of a circular, rectangular or hexagonal cross section.

### Claim 10 (depends on 1)

The household appliance according to claim 1, wherein the guiding element comprises two contact surfaces for a respective sliding element.

### Claim 11 (depends on 1)

The household appliance according to claim 1, comprising two groups of guide elements arranged on respective opposite sides of the drawer housing.

### Claim 12 (depends on 1)

The household appliance according to claim 1, wherein the respective guiding element is integrated with the drawer housing.

### Claim 13 (depends on 1)

The household appliance according to claim 1, wherein the guiding element is arranged on a seat of the drawer housing.

### Claim 14 (depends on 13)

The household appliance according to claim 13, wherein the guiding element comprises a C shaped section with two parallel parts and a main part perpendicular to the parallel parts (236, 240) configured to at least partly receive the sliding element.

### Claim 15 (depends on 1)

The household appliance according to claim 1, wherein the household appliance comprises a laundry treatment machine.