Washer attachment for a suction cleaner
US4887330A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 21, 1988 |
| Grant date | Dec 19, 1989 |
| Priority date | — |
| Expiry date | Dec 21, 2008 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA47L11/4094
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
An attachment for the intake hose of a suction cleaner for dispensing liquid to the surface to be suctioned, near the intake to the suction nozzle. A liquid supply tank is supported near the suction nozzle. A valve dispenses the liquid. In one embodiment, a surface engaging brush or roller communicates with the valve. When the surface engaging element engages the surface, it opens the valve to dispense liquid from the tank to a liquid dispensing bar. A second embodiment uses a float valve which normally closes the communication between the inlet to the valve and the outlet from the valve to the dispenser bar. An additional conduit communicates with the nozzle to supply suction to the float valve, and when the suction inlet to the suction nozzle is partially obstructed, e.g. against the surface being suctioned, this increases the vacuum above the suction nozzle. The suction communicates through the additional conduit to the float valve to open the communication from the valve inlet to the dispenser bar. A third embodiment uses a pinch valve. When the valve is open, liquid flows downward over shelves in a progressively wider pattern until the liquid reaches the surface to be cleaned.…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.