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EP0908121A1 Expired / Lapsed EP ⏱️ 0.0 years remaining

Vacuum cleaner with directly generated electrostatic effect

Assignee: Candy SpA
•
Filing: 1997-07-28
•
Granted: —
•
Expires: 2017-07-28
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Abstract

Abstract A vacuum cleaner with an electrostatic effect, in which a suction motor unit (13) drives a frictional electrostatic generator formed by two circular rings (17, 18) of two different electrostatically chargeable materials moving relative to one another and the electrical charges of opposite sign generated are applied, respectively, to a dust container (4) and to a field plate (9, 22) housed in the container (4) and insulated therefrom, so that the electric field generated inside the container attracts and retains against the field plate and the internal wall of the container the dust particles transported by an air-flow admitted to the container.

Inventors

  • 👤 Silvano Fumagalli

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-11-08 18:43
CPC Classifications
A; A47; A47L; A47L9/00; A47L9/10; A47L9/14; A47L9/1409; A47L9/28; A47L9/2889

Claims Analysis

Total Claims: 5
Claim 1
Independent Claim 140 words
An electrical appliance such as a vacuum cleaner, electric sweeper, or the like with an electrostatic effect, comprising a suction motor unit (13) for generating an air-flow which is drawn in through a suction union (3), and a particle-collection container (4) in communication with the union (3), characterized in that the vacuum cleaner also comprises a frictional electrostatic generator (15, 17, 18 19) driven by the suction motor unit (13) and having two conductive plates (15, 19) for collecting electrical charges of opposite signs generated by the electrostatic generator, in that the container (4) is made of conductive material and is electrically connected to one (19) of the two plates, and in that the container (4) houses a third conductive field plate (9, 22) electrically insulated from the container and electrically connected to the other (15) of the two plates.
Claim 2
Dependent Claim 17 words
An electrical appliance according to Claim 1, in which the third plate (9) is a metal plate.
Claim 3
Dependent Claim 36 words
An electrical appliance according to Claim 1, in which the third plate is constituted by a beaker-shaped element (22) with openings for the passage of air and an inlet opening connected to the suction union (3).
Claim 4
Dependent Claim 81 words
An electrical appliance according to the preceding claims, comprising a removable container lid (7) with openings for the passage of air, housing a suction elbow (8) connected to the union (3), and an outer shell (1, 2) of insulating material for housing the container (4) and the container lid (7) forming a space between the container (4) and the shell (1, 2) for conveying the air flowing out of the lid (7) into the space towards the suction motor unit (13).
Claim 5
Dependent Claim 93 words
An electrical appliance according to the preceding claims, in which the electrostatic generator comprises a conductive disk (15) keyed to the shaft of the suction motor unit (13) and forming one of the two plates, the disk being coupled to a first circular felt or brush ring (18) of a first electrostatically chargeable material, which is juxtaposed with a second circular felt or brush ring (18) of a second electrostatically chargeable material different from the first, coupled to the other (19) of the two plates, the other plate being fixed in the appliance.

References Cited (Backward Citations)

US4186030A Cited
DE3143489A1 Cited
EP0578365A1 Cited
US5400465A Cited

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