Brush mounting and torsion spring support for powered nozzle

Claim 1

A counterbalanced rug and floor nozzle having a handle and including: a. a housing for forming the major portion of the outline of the nozzle, b. a bottom plate attached to said housing, c. an elongated aperture in said bottom plate, d. brush means mounted with said bottom plate and extending through said elongated aperture, e. means for mounting said brush means to said bottom plate for limited movement inwardly and outwardly of said nozzle, f. said mounting means including a leaf spring arrangement resiliently urging said brush means outwardly and adjustable means interposable between said leaf spring arrangement and said bottom plate for moving said brush means against said resilient urging to retract said brush means into said nozzle, g. said adjustable means including a generally flat bar lying against said bottom plate and having shaped protrusions formed integrally thereon so each smoothly varies in depth from a minimum adjacent its one end to a maximum adjacent its other end to thereby provide a smooth, gradual camming ramp and said bar reciprocal relative to said bottom plate to simultaneously interpose more or less of said shaped protrusions and thereby more or less of the depth of the camming ramps between said leaf spring arrangement and said bottom plate so that said brush means is adjustably moved inwardly and outwardly of said aperture, and h. torsion spring means attached to said hausing for reacting thereagainst for counterbalancing the same during use, said torsion spring having its other reaction point against said handle.