Patent ID: 9243414
Filing Date: 2016-01-26
CPC Classification: E04H

Claim Text:
1. A pool cleaning device for removing dirt and debris from a swimming pool bottom, comprising: a rectangular housing having two short and two long housing sides and a long housing centerline, a housing bottom with a suction hole centrally located within a housing bottom planar area, and a housing top with a pole attachment fitting and a tubular outlet for connecting the suction hole to a suction means via a hose; at least four transport wheels rotatably attached to said rectangular housing via transport wheel axles so as to enable the pool cleaning device to be rolled along the swimming pool bottom with the long housing sides perpendicular to the direction of motion and the width of the bottom gap between the housing bottom planar area and the swimming pool bottom remaining substantially uniform and constant at a predetermined value; two cylindrical rotary brushes each having a brush axle rotatably attached at both ends to said rectangular housing so as to be parallel with the transport wheel axles and adjacent to one of the opposing long housing sides such that the bristles of said cylindrical rotary brushes contact the swimming pool bottom; and at least two rotary drive mechanisms each of which includes a ratchet connection whereby rotation of said transport wheels, produced by rolling the pool cleaning device along the swimming pool bottom, drives rotation of the cylindrical rotary brush on the leading edge of the pool cleaning device in the same rotational direction as said transport wheels but does not cause the cylindrical brush on the trailing edge of the pool cleaning device to rotate, whereby tree leaves and other debris are effectively captured due to a downward sweeping action produced by rotation of the cylindrical rotary brush on the leading edge as the pool cleaning device, connected to a suction means, is rolled back and forth over the swimming pool bottom by an operator pulling and pushing on a pole attached to the pole attachment fitting.