Adjustable brush roller accessory for vacuum cleaner or the like
US7266861B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 28, 2003 |
| Grant date | Sep 11, 2007 |
| Priority date | — |
| Expiry date | Mar 14, 2025 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA47L9/0494
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
A brush roller accessory for a vacuum cleaner includes a main support roller and a power-driven brush roller rotatably arranged in a housing, and a spring-biased adjusting roller that adjustably protrudes from the housing to bear some of the total contact force of the accessory against a floor, to reduce or relieve the contact force exerted by the brush roller against the floor. The adjusting roller is rotatably mounted on a pivot lever, having a first end pivotally connected to the housing and a second end connected to a spring that biases the lever to pivot the adjusting roller outwardly from the housing. A rotary knob with several stop surfaces selects an upper limit on the pivot range of the lever and the adjustment height of the adjusting roller. A coupling link pivots the adjusting roller to a maximally protruding position to lift the brush roller into a parking position.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.