Patent ID: 6915541

Claim:
A wash liquid-operated wash brush comprising: a casing having a downwardly opening top cover, said casing having a liquid inlet for coupling to a wash liquid supply with a nozzle for tangentially directing wash liquid into said casing, a rotary wash brush supported by said casing for relative rotation, an impellor supported by said casing for rotation relative to said rotary brush as an incident to direction of wash liquid into said casing from said nozzle, a gear train coupled between said impellor and rotary brush for rotating said rotary brush as an incident to rotation of said impellor, said cover, being made of a transparent material for enabling a user of said wash brush to observe rotation of said impellor through said cover, said impellor having a downwardly opening cup shape overlying said gear train such that the gear train is located underneath and within the perimeter of the impellor, said casing includes a frame plate on an underside of said cover, a central shaft rotatably supported between said frame plate and cover, said rotary brush being fixed to said central shaft, and said impellor being mounted about said central shaft for relative rotation with respect thereto, a splash plate mounted on said frame plate, said splash plate comprising a generally circular solid and uninterrupted plate disposed between the gear train and the brush for blocking the splash back of liquid from said rotary brush to said gear train during operation thereof, said splash plate having a diameter of at least one-half the diameter of said impellor and further being substantially centered with respect to the axis of rotation of said brush.