Vacuum cleaner having airflow recirculation path for cooling beater brush motor
US6581241B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 21, 2001 |
| Grant date | Jun 24, 2003 |
| Priority date | — |
| Expiry date | Sep 22, 2021 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA47L9/322
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
A vacuum cleaner system incorporating a closed loop airflow recirculation path for cooling a beater brush motor. A portion of clean, exhaust airflow created by a fan is diverted away from an exhaust port of the housing and directed into a flow path running alongside a portion of the housing. The airflow is used to pressurize a compartment within which a beater brush motor is disposed. A low pressure area created by the fan is used to assist in drawing the cooling exhaust airflow through the compartment, to thus form a closed loop cooling air recirculation system using only clean, filtered exhaust airflow to maintain the beater brush motor cool during use.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.