Vacuum cleaner with performance monitoring system
US4733431A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 9, 1986 |
| Grant date | Mar 29, 1988 |
| Priority date | — |
| Expiry date | Dec 9, 2006 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA47L9/2894
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
A canister type vacuum cleaner includes a floor cleaning unit and a canister unit interconnected by a wand and hose assembly. The canister unit has a dust collection bag mounted in a dust collecting compartment by a dust bag mount. A suction fan evacuates the air within the dust collecting compartment causing dirt laden air to flow from the floor cleaning unit through the wand and hose assembly and into the dust bag through an intake port formed in the dust bag mount. The air is exhausted from the canister unit through a discharge port. A performance monitoring and indicating system provides information as to the operative condition of the vacuum cleaner by means of an "OK" light, a "No Bag" light, a "Check Bag" light and a "Check Hose" light. A dust bag sensor senses the differential pressure between the intake port and the dust collecting compartment and is actuated when a functional dust bag is properly mounted on the dust bag mount. A discharge sensor senses the differential pressure between the discharge port and the dust collecting compartment and an intake sensor senses the differential pressure between the outside of the vacuum cleaner and the intake port. The actuation of …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.