Gerald D Cain

US Patent:

43770185, Mar 22, 1983

Filed:

Jun 24, 1981

Appl. No.:

6/277037

Inventors:

Gerald E. Cain - North Canton OH

Assignee:

Roto Cleaner, Inc. - North Canton OH

International Classification:

A47L 1130

US Classification:

15322

Abstract:

A mobile cleaning device for large flat surfaces includes a housing which forms a spray chamber having an open bottom. A first pair of exhaust ducts is mounted on the front and rear walls of the housing, and a second pair of exhaust ducts is mounted on the top wall of the housing adjacent the housing side walls for removing the debris and spent cleaning fluid from within the spary chamber as the device is moved along a surface being cleaned. An improved fluid-powered rotor is mounted on the housing and rotatably mounts and drives a plurality of fluid spray nozzles by use of the back pressure exerted by the cleaning fluid as it is sprayed from the nozzles against the surface being cleaned. The rotor is provided with an effective seal for the high pressure fluid with respect to the stationary components adjacent the movable rotor. The exhaust ducts are connected to a source of suction through a manifold in which the total area of the exhaust duct openings on the inlet side of the manifold is equal to the area of the suction opening on the outlet side of the manifold.