Patent ID: 8443478

Claim:
A motor assisted surface cleaning device, comprising: a head cleaning unit having a forward end and a rear end, the head cleaning unit comprising first and second elongate, rotatable bristled cleaning bars positioned in close proximity to one another and that each rotate about a respective axis, the bristled cleaning bars being configured to rotate in opposite directions, the first cleaning bar being more proximate the forward end of the head cleaning unit than the second cleaning bar, a debris collection reservoir attached to the rear end of the head cleaning unit and situated partly rearward of the first and second cleaning bars, and a handle attached to the head cleaning unit, the head cleaning unit further comprising a wall structure arranged between the first and second cleaning bars, the wall structure including a first wall portion rearwardly inclined from a vertical line such that an upper end of the rearwardly inclined first wall portion is more proximate the rear end of the head cleaning unit than a lower end, the wall structure also including a second wall portion that extends around part of a circumference of the second cleaning bar, the first wall portion being configured to cause debris propelled by the first cleaning bar to be directed in a rearward direction toward the debris collection reservoir, the second wall portion being configured to cause debris propelled by the second cleaning bar to be directed to the debris collection reservoir.