Multi-position brush nozzle for vacuum cleaner

Claim 1

A nozzle assembly for use with a vacuum cleaner comprising an elongated upper housing member having an upper surface with an aperture therein, indicia on said upper surface which are visible to the operator of said nozzle assembly, a suction channel having an inlet opening and an outlet opening for connection to a source of suction to draw air into said inlet opening and through said suction channel, an elongated guide channel formed by said suction channel and a plurality of downwardly depending parallel guide walls which are positioned rearwardly of said inlet opening and which run in the direction parallel to the long dimension of said elongated upper housing member, at least one brush assemby guide wall positioned forwardly of said parallel guide walls, an elongated lower housing membeR having wheel support means, elongated brush assembly opening in said lower housing member located rearwardly of said inlet suction opening, an elongated brush assembly comprising a frame member and a plurality of downwardly extending bristles, said frame member having a control projection and a pair of guide wings which cooperate with said brush assembly guide wall and said parallel guide walls to guide said brush assembly when said brush assembly is undergoing upward and downward motion, means for securing said upper and lower housing members together, means for resiliently biasing said brush frame member downwardly, means for limiting the downward extension of said brush assembly, a cam, cam control means having a control arm coupled to said cam and indicating means coupled to said control arm which has an indicating member that extends through said aperture in said upper surface of said upper housing member for providing an indication of the position of said cam in cooperation with said indicia, said cam control means being constructed such taht said cam slides between said parallel cam guide walls in a direction parallel to the long dimension of said elongated upper housing member to at least three distinct positions, said cam comprising a first restricted area at a high level with respect to the surface being cleaned, a second restricted area at a low level with respect to the surface being cleaned and an open area, said control projection of said brush assembly being located in said high level restricted area when said cam is in said first position, said control projection being located in said open area when said cam is in said second position and said control projection being located in said low level restricted area when said cam is in said third position.