Intake seal for tank vacuum cleaner
US4964189A · kind A · utility
24Cited by
10References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 12, 1989 |
| Grant date | Oct 23, 1990 |
| Priority date | — |
| Expiry date | Jan 12, 2009 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA47L9/242
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
An adapter, mounted on the cylindrical sidewall of the vacuum cleaner tank, provides a receptacle for a rigid connector on which a flexible vacuum hose is sealingly mounted. The leading edge of the connector insert is beveled. A corresponding beveled surface is formed on the inner wall of the receptacle to engage and seal with the beveled leading edge of the connector to form a continuous, peripheral seal immediately adjacent to the wall of the tank so that when the vacuum motor is turned on, a positive force is generated to increase the effectiveness of the seal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.