Hand vacuum cleaner
US4633543A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 9, 1984 |
| Grant date | Jan 6, 1987 |
| Priority date | — |
| Expiry date | Nov 9, 2004 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA47L5/26
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
A hand vacuum cleaner is provided comprising a lightweight motor housing containing a revolving brush. A bag assembly is selectively separable from the housing and is sealable to the housing with an elastomeric retaining ring including a sealing and retaining bead for reception in a recessed slot area of a housing bag attachment collar. A fan is mounted to the motor on a motor shaft locking surface including a wall portion tapering towards the fan. The shaft is in locking cooperation with a mating fan bore locking surface including a wall portion tapered for close reception of the motor shaft locking surface. A shaft extension is threadedly received on the motor shaft and is urged into engagement against the fan by resistance of a revolving brush operated by a belt received on the shaft extension which continually tightens the shaft extension to the motor shaft and fixes the fan to the motor shaft. A stone shield is circumferentially spaced about the fan whereby the stone shield block items impinging against the housing from the fan from damaging the housing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.