Handle and exhaust duct coupling assemblies for floor care machines
US6442793B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 29, 2000 |
| Grant date | Sep 3, 2002 |
| Priority date | — |
| Expiry date | Sep 29, 2020 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA47L9/242
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
Handle and exhaust duct coupling assemblies for floor care machines are disclosed. In one embodiment, an exhaust duct coupling assembly includes a first duct having an outer surface with an external thread disposed thereon and a locking tab projecting outwardly therefrom. A second duct is slideably engaged into the first duct, and a flexible seal is disposed about the second duct proximate an end of the first duct. A collar having a hole therethrough is disposed about the second duct and threadedly engaged with the end of the first duct. The collar presses the seal into an approximately sealing engagement against the second duct and the end of the first duct. The collar includes a locking surface frictionally engaged with the locking tab and inhibiting a disengaging movement of the collar. Alternately, the locking surface of the duct coupling assembly may be an annular surface disposed on an inner surface of the collar, or may be disposed on an end surface of the collar. In yet another embodiment, a handle coupling assembly includes a receiving member having an outer surface with an external thread disposed thereon and a plurality of bendable members projecting outwardly therefrom …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.