High volume, high performance, ultra quiet vacuum cleaner
US5502869A · kind A · utility
59Cited by
6References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 27, 1994 |
| Grant date | Apr 2, 1996 |
| Priority date | — |
| Expiry date | Oct 27, 2014 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA47L9/0081
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
An ultra quiet vacuum cleaner having a bag cavity (44), a motor/blower chamber (48) connected to said cavity by a flexible coupling (47) and an active, adaptive noise cancellation controller (52) so configured to quiet the exhaust of the air used to cool the motor/blower unit. Fast compensation and feedback compensation allow use of a straight, short duct (51) for superior cancellation performance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.