Vacuum cleaning head
US7526834B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 28, 2005 |
| Grant date | May 5, 2009 |
| Priority date | — |
| Expiry date | Jan 8, 2026 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA47L9/0416
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
A vacuum cleaning head includes a housing having an agitator in the form of a brush bar rotatably arranged in a chamber having an air inlet and an air outlet and also includes an air turbine for driving the brush bar is provided. The air turbine has its own air inlet for admitting clean air to drive the turbine. A restricting member is arranged in the outlet of the chamber so as to restrict the cross-section of the outlet when the head is pressed against a surface to be cleaned and to restrict the flow of air from the brush bar chamber. The restricting member is designed to distribute incoming air between the main inlet and the turbine inlet in a satisfactory ratio. Thus, more air flows through the turbine, enabling it to drive the brush bar at high rotational speed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.