Patent ID: 7520282
Filing Date: 2009-04-21
Classification: E04H,F16H,Y10T

Abstract:
1. An automatic cleaner for surfaces submerged in a liquid, the surfaces including a substantially vertical wall of a pool, comprising: a body; a wheeled undercarriage for the body; the wheeled undercarriage comprising a first submerged surface engaging section and a second section; the second section being pivotable in elevation relative to the first submerged surface engaging section; wherein the first submerged engaging surface section extends between a first axle on the body and a second axle, wherein the second section extends between the second axle and a third axle, wherein the second axle and the third axle are mounted on a front assembly which is pivotable relative to the body in order to engage and climb the substantially vertical wall of the pool, wherein the first axle is coupled to a rear part of the body and wherein the front assembly is pivotably mounted on a front region of the cleaner, wherein first and second axially spaced endless tracks are provided to extend about the first axle, the second axle, and the third axle, wherein the first endless track extends about respective first wheels on the first, second and third axles and wherein the second endless track extends about respective axially spaced second wheels on the first, second and third axles, and wherein a surface engaging roller is provided on at least one of the first, second and third axles to extend between the first and second wheels on the at least one of the first, second and third axles wherein the first axle is driven by a turbine mounted in the body, and the turbine is driven by liquid flowing through the cleaner body under the influence from a remote suction pump which is connectable to the body in order to clean the pool by filtration.