Carpet cleaning machine
US4268935A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 21, 1979 |
| Grant date | May 26, 1981 |
| Priority date | — |
| Expiry date | Sep 21, 1999 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01F11/22
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
A carpet cleaning machine for uniformly spreading a powder onto a surface, working the powder into the surface and subsequently removing the powder and dirt is disclosed. The cleaning machine includes a powder dispenser attachable to a vacuum cleaner. The dispenser includes a hopper, a metering drum rotatably mounted within the hopper about a mandrel and a punch roller rotatably mounted within the metering drum. An air motor is operably connected to the metering drum. The vacuum cleaner includes an agitating brush, a suction nozzle, a suction passage and a source of vacuum connected to the suction passage. A blocking vane mounted within the housing and the suction passage alternately connects the suction nozzle to the source of vacuum or the air motor to the source of vacuum. A throttle valve carried in an air outlet tube of the air motor includes a lever which automatically interconnects with a control permanently mounted on the vacuum cleaner.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.