Motor housing with silencer for a vacuum cleaning device
US10874270B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 10, 2017 |
| Grant date | Dec 29, 2020 |
| Priority date | — |
| Expiry date | Oct 16, 2037 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA47L5/362
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
A compact motor housing for housing a motor and a blower of a cleaning device and with integrated air outlet silencing. The motor housing encloses a flow passage between a flow inlet and outlet. The housing has a blower chamber fluidically connected to the flow inlet, and via first and second outlet openings also fluidically connected to at least two parallel, preferably similar, silencer ducts each being arranged in an area limited by an angle of less than 90°, seen in a view parallel with the blower and motor axis. The silencer ducts each have at least one wall between the blower chamber and the external wall of the motor housing for causing at least one flow direction bend, so as to provide a noise attenuating effect. The areas occupied by the at least two silencer ducts are non-overlapping, seen in a view parallel with the blower and motor axis. With a circular blower chamber, a compact box shaped motor housing can be provided with corner volumes available for silencer ducts.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.