Patent ID: RE42155

Claim:
A vacuum power head for cleaning, comprising: a) a housing having a front and rear portion portions ; b) an agitator assembly with a front rotary agitator and a rear rotary agitator; c) an electric motor; d) a power transfer means for transferring rotary power from said electric motor to said front and rear rotary agitators; e) a suction conduit having an entrance and an output port; f) a hose wand; g) a lever arm connected between said hose wand and said agitator assembly for amplifying the a force exerted by the hose wand on the agitator assemble assembly ; h) an adjustment means associated with said lever arm and said agitator assembly for generating a net traction force on said front and rear rotary agitators when in contact with a surface and said net traction force responsive to the force exerted on said hose wand by a user; i) wherein, said suction conduit forms a continuous air channel between at least one of the rotary agitators and said output port; j) wherein, said output port is designed to accept the hose wand, whereby dirt and dust agitated by the rotary agitators can be removed from the power head; k) wherein, said front and rear rotary agitators rotate in opposite directions when powered by said power transfer means, and l) wherein, said net traction force is in the direction of the front portion of the housing when the user is pushing the hose wand forward and said net traction force is in the direction of the rear portion of the housing when the user is pulling backward on the hose wand, whereby the vacuum power head provides a self-propelled function.