Automatic vacuum nozzle height adjustment system for vacuum cleaner
US4706327A · kind A · utility
58Cited by
17References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 30, 1986 |
| Grant date | Nov 17, 1987 |
| Priority date | — |
| Expiry date | May 30, 2006 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B40/00
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
A vacuum cleaner includes a device which senses brush speed while varying nozzle height settings until an optimum height setting is reached. Nozzle height is varied by a motor that rotates a cam to move a support roller and is set by stopping the motor when a predetermined brush speed condition is reached. A programmed control circuit senses the brush speed while controlling the cam motor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.