Mobile sweeper

• US 20110126367A1
• Filed: 11/08/2010
• Published: 06/02/2011
• Est. Priority Date: 05/14/2008
• Status: Active Grant

• Current Assignee: Alfred Kã¤Rcher GmbH & Company KG
• Original Assignee: Alfred Kã¤Rcher GmbH & Company KG
• Inventors: Schick, Roland, Wolf, Hans-Peter
• Granted Patent: US 8,621,700 B2
• Time in Patent Office: Days
• US Class Current: 15/21.1
• CPC Class Codes: A47L 11/24 Floor-sweeping machines, motor-driven
• CPC Class Codes: A47L 11/4036 Parts or details of the surface treating tools
• CPC Class Codes: A47L 11/4072 Arrangement of castors or wheels

Abstract

The invention relates to a mobile sweeper comprising a housing, in which a sweeping roller driven by an electric motor is mounted for rotation, and a sweepings container for receiving sweepings, wherein there are mounted on the housing adjacent to the sweeping roller two front supporting wheels and at a distance from these at least one rear supporting wheel, each for rotation about an axis of rotation. In order to further develop the sweeper such that with the occurrence of surface unevennesses, there is no risk of the sweeping roller becoming blocked or of the sweeper tilting, it is proposed in accordance with the invention that the axis of rotation of a first front supporting wheel be arranged coaxially with the axis of rotation of the sweeping roller and, in relation to the main direction of movement of the sweeper, offset from the axis of rotation of the second front supporting wheel.

Claims

1. Mobile sweeper comprising:

a housing, in which a sweeping roller driven by an electric motor is mounted for rotation; and

a sweepings container for receiving sweepings;

wherein there are mounted on the housing adjacent to the sweeping roller two front supporting wheels and at a distance from these at least one rear supporting wheel, each for rotation about an axis of rotation; and

wherein the axis of rotation of a first front supporting wheel is arranged coaxially with the axis of rotation of the sweeping roller and, in relation to the main direction of movement of the sweeper, offset from the axis of rotation of the second front supporting wheel.

2. Sweeper in accordance with claim 1, wherein the axis of rotation of the second front supporting wheel is arranged, in relation to the main direction of movement of the sweeper, behind the sweeping roller.

3. Sweeper in accordance with claim 2, wherein the second front supporting wheel is arranged immediately behind the sweeping roller.

4. Sweeper in accordance with claim 1, wherein the diameter of the first front supporting wheel is larger than the diameter of the second front supporting wheel.

5. Sweeper in accordance with claim 1, wherein the diameter of the first front supporting wheel is at least 8 cm.

6. Sweeper in accordance with claim 1, wherein the diameter of the first front supporting wheel is at least 1.3 times the diameter of the second front supporting wheel.

7. Sweeper in accordance with claim 1, wherein the end face, oriented away from the first front supporting wheel, of the sweeping roller is arranged, transversely to the main direction of movement of the sweeper, level with the second front supporting wheel or projects beyond the second front supporting wheel.

8. Sweeper in accordance with claim 1, wherein the at least one rear supporting wheel is mounted for rotation on a pivot support which is pivotable about a vertical pivot axis.

9. Sweeper in accordance with claim 1, wherein the sweeper comprises two rear supporting wheels.

10. Sweeper in accordance with claim 1, wherein the at least one rear supporting wheel has a smaller diameter than a front supporting wheel.

11. Sweeper in accordance with claim 1, wherein the sweeper comprises at least one rechargeable battery.

12. Sweeper in accordance with claim 11, wherein the rechargeable battery is equipped with lithium-ion cells.