Patent ID: 8393044

Claim:
A washing rotary brush for motor vehicle washing systems, wherein said washing rotary brush comprises a cylindric central support having a cylindric wall, said cylindric wall having a cylindric wall outer surface, to said cylindric wall outer surface being fixedly coupled, by fixed joint coupling means, a plurality of band elements, said fixed-joint coupling means comprising a clamping bar element having a first projecting enlarged end portion engaged in an engagement recess formed adjoining a respective slot of a plurality of slots arranged along directrix lines in said cylindric wall outer surface of said cylindric central support, wherein said clamping bar element further comprises a second end portion including a tooth engageable in a hole formed at an end portion of said slot, on an annular rim encompassing said cylindric central support, wherein, after having been engaged in said slot, said first projecting enlarged end portion of said clamping bar element closely and safely contacts and is welded to said cylindric wall outer surface, and wherein said slots are helically arranged on said cylindric central support.