Patent ID: 7546959

Claim:
A cleaning nozzle having a nozzle body and a nozzle head arranged on a shaft rotatably seated on said nozzle body, and having a cavity, which extends substantially in the axial direction in said nozzle body and which is connected with a pressurized water connection supply, wherein pressurized water supplied via the pressurized water connection supply is guided to the nozzle head by the cavity and is discharged from the nozzle head to the outside by at least one nozzle orifice, wherein said cleaning nozzle comprises at least two disc elements, arranged in the area of the cavity and moving substantially into mechanical contact one with the other in the direction of flow of the pressurized water, wherein the second one of the at least two disc elements is embedded in a concentrically arranged circular recess of a sleeve body which forms an edge on the inside of the cavity, on which the pressurized water flowing through the cavity produces turbulence or vortexes through which the contact pressure of the at least two disc elements is increased, wherein the at least two disc elements form a friction brake that acts to restrict the rotational motion of the shaft.