Upright water extraction cleaning machine with improved tank structure
US6167586A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 4, 1998 |
| Grant date | Jan 2, 2001 |
| Priority date | — |
| Expiry date | May 4, 2018 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/88054
- WIPO fieldFurniture, games
- WIPO sectorOther fields
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 flui…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.