Blower-vacuum devices
US7266860B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 22, 2003 |
| Grant date | Sep 11, 2007 |
| Priority date | — |
| Expiry date | Sep 29, 2025 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE01H1/0827
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
The present invention provides a blower-vacuum device with both a blowing mode of operation and a vacuuming mode of operation and having dirty fan operation in the vacuuming mode thereof, which comprises: a hand-holdable unit (10) comprising a motor having an output shaft extending outwardly of said hand-holdable unit; an impeller connected to said output shaft; a first attachment (22, 24, 26, 28) for removable engagement with the hand-holdable unit (10) in the vacuuming mode of operation and comprising both a first volute (22) for enclosing said impeller and a vacuum tube (26) in fluid communication with an inlet of said first volute; a second attachment (16, 18, 20) for removable engagement with the hand-holdable unit (10) in the blowing mode of operation and comprising both a second volute (16) for enclosing said impeller and a blower tube (20) in fluid communication with an outlet of said second volute; wherein the first attachment further comprises a handle (24) on or proximal to said first volute; and the blower tube (20) of the second attachment is coplanar with the second volute (16). Thus the impeller is always easily accessible for cleaning if it becomes clogged with gard…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.