Patent ID: 10980384

Abstract:
A surface cleaning device comprises a brush (B) that is curved at least partially around a center part (CP) of the surface cleaning device, a deformability of the brush (B) determining a deformability of an outer circumference of the surface cleaning device. The brush (B) has a rotation axis (A), which is curved at least partially around the center part (CP) of the surface cleaning device. The rotation axis (A) is parallel to the surface. The brush (B) may be a donut-shaped brush (B) fully around the center part (CP) of the surface cleaning device. The surface cleaning device may have an electrical motor (M) for driving the brush (B). The center part (CP) may comprise a container (DC) for collecting dirt swept from the surface by the brush (B). The center part (CP) may have an edge (E) for bending the brush (B), dirt being released from the brush (B) at an end of the edge (E) where the brush (B) is relaxed. The center part (CP) may have an upper rim (R) for keeping the brush (B) at its position. A length of brush fibers from the rotation axis (A) of the brush (B) is preferably at least about 0.4, and more preferably at least about 0.6, times a radius of an undeformable core of the surface cleaning device. The surface cleaning device may further comprise a fan for generating an air flow that does not exceed 6 1/s, preferably 3 1/s, and more preferably 1.5 1/s.