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US 4,304,022 AGranted
Underwater cleaning apparatus
AssigneeSchenk AG
InventorPeter Sommer
Life of this patent
Estimating the term…
Abstract
A tapering flow duct is formed below a chassis having a caterpillar track and forms lateral openings between a cleaning brush and the tracks. The flow duct is connected through an opening to a suction duct of a suction pump which conveys the sucked up liquids with the contaminants contained therein into a filter. Due to the increased flow velocity, the static pressure in the flow duct is reduced, so that the chassis is pressed onto the bottom surface and can overcome severe gradients without sliding.
Claims8
An apparatus for cleaning a surface underwater and particularly the bottom of a swimming pool comprising the combination of
- a chassis,
- means for moving the chassis across the surface to be cleaned,
- a rotatable cleaning brush carried by said chassis at an end thereof for contacting the surface to be cleaned;
- a filter and a suction pump carried by said chassis for causing flow of water and contaminants through said filter;
- wall means carried by said chassis on the bottom thereof for defining a flow duct for conveying water and contaminants from said brush to the inlet of said pump;
- said wall means extending along the surface to be cleaned and converging toward each other in a plane generally parallel to a plane containing the surface to be cleaned to form a tapered duct portion along said surface.
3 more elements
Dependencies are inferred from the claim text.