Recirculating type cleaner
US5647092A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 28, 1995 |
| Grant date | Jul 15, 1997 |
| Priority date | — |
| Expiry date | Jun 28, 2015 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA47L5/14
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
In a recirculating type cleaner a dust collecting head having a dust collecting port in the bottom thereof is provided, and a nozzle is provided in the dust collecting head. At least a fraction of the after-flow air of a fan is passed through a recirculating tube to the nozzle from which air jet is issued. A contact member is provided in the dust collecting head for contacting carpet piles being cleaned within a portion of the region of the dust collecting port to bend the piles down in the sweeping direction when the cleaner is moved in its sweeping stroke, whereby a gorge is opened in the piles. The nozzle is oriented such that the air jet issued through the nozzle is directed to the bottom of the gorge. Pile bend inverting member is also provided to create the gorge positively by mechanical pushing of the piles just behind the gorge to the reverse direction of the cleaning stroke.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.