Vacuum cleaning appliances
US4573236A · kind A · utility
183Cited by
23References
17Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 2, 1984 |
| Grant date | Mar 4, 1986 |
| Priority date | — |
| Expiry date | Jul 2, 2004 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA47L5/32
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
A vacuum cleaning apparatus with an improved air control valve (22) for directing air flow to a passageway (11) in a casing either from a cleaning head (2) or a hose section (6) is described. In the preferred form the valve rotates to provide internal passages to the air passageway in the casing. The apparatus is particularly adapted as a vacuum cleaning appliance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.