Cleaning device for cleaning a surface comprising a brush and a squeegee element

  • US 9,173,536 B2
  • Filed: 08/02/2012
  • Issued: 11/03/2015
  • Est. Priority Date: 08/23/2011
  • Status: Active Grant
First Claim
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1. A cleaning device for cleaning dirt particles and liquid from a surface, said cleaning device comprising:

  • a brush rotatably mounted in a nozzle housing for rotation about an axis and comprising a multiplicity of radially-extending flexible brush elements uniformly distributed over a circumferential periphery of the brush, said nozzle housing at least partly surrounding the brush and including an opening at a bottom side that, during use of the cleaning device, faces the surface to be cleaned, said opening being defined by first and second axially extending end portions nozzle housing arranged such that, during rotation of the brush;

    the first axially-extending and portion is located sufficiently close to ends of the brush elements leaving the nozzle to continuously form a seal therewith, but access of said brush elements to the dirt particles and liquid on said surface to be cleaned being unobstructed when the nozzle is moved in a direction in which the second axially-extending end follows the first axially-extending end; and

    the second axially-extending end portion is spaced apart from brush elements re-entering the nozzle housing after contacting the surface to be cleaned, said spacing of the second axially-extending end portion from the re-entering brush elements defining a suction area for vacuuming the dirt particles and liquid from the surface to be cleaned;

    a single wiper strip attached along the second axially-extending end portion of the nozzle housing and extending to the surface to be cleaned, said wiper strip being adapted to move dirt particles and liquid along the surface to be cleaned during movement of the cleaning device and defining, in a region between the single wiper strip and the brush elements, a suction inlet in communication with the suction area;

    a drive apparatus for rotating the brush; and

    a vacuum apparatus for coupling to a suction outlet in communication with the suction area for generating an under-pressure in said suction area.

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