Patent Number: 6,167,586

Title: Upright water extraction cleaning machine with improved tank structure

Abstract: A portable surface cleaning apparatus has a base for movement along a surface to be cleaned and an upright handle pivotally attached to a rearward portion of the base. A fluid dispensing nozzle for applying fluid to the surface and a suction nozzle for picking up fluid and debris from the surface are associated with the base. Supply tanks are removably mounted to the handle or base while a recovery tank is removably mounted to the handle or base. An outlet in each supply tank includes a valve to close the outlet when the supply tank is removed from the base. A protrusion in a bottom surface of the supply tank defines a measuring volume for concentrated cleaning solution and is further adapted to stabilize the supply tank in the base or handle. The supply tank also includes an aperture through a lower portion selectively closed by a drain plug. A conduit connecting each supply tank to a dispensing nozzle includes a check valve restricting fluid flow to a direction from the tank and to the nozzle. Also, a float assembly in the recovery tank includes a first end for covering an air exit from the recovery tank and a second end, which is buoyant and elevated by the rising recovered fluid in the tank, for raising the first end to cover the air exit.

Inventors: Reed, Jr.; Charles A. (Rockford, MI), Kasen; Timothy E. (Jenison, MI), Kelly; Luke E. (Grand Rapids, MI), Smith; Gary L. (Belding, MI), Metzger; Eric R. (Sand Lake, MI)

Assignee: Bissell Homecare, Inc.

International Classification: A47L 11/30 (20060101); A47L 11/00 (20060101); A47L 11/03 (20060101); A47L 11/34 (20060101); A47L 11/29 (20060101); A47L 5/28 (20060101); A47L 5/30 (20060101); A47L 9/00 (20060101); A47L 5/22 (20060101); A47L 5/32 (20060101); A47L 7/00 (20060101); A47L 9/02 (20060101); B01F 15/04 (20060101); B01F 3/08 (20060101); B01F 5/00 (20060101); A47L 007/00 (); A62C 013/62 ()

Expiration Date: 01/02/2018