Patent CH74079A successfully refreshed from Google Patents.
Patent EP0908121A1 successfully refreshed from Google Patents.
EP0908121A1
Expired / Lapsed
EP
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Vacuum cleaner with directly generated electrostatic effect
Assignee: Candy SpA
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Filing: 1997-07-28
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Granted: —
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Expires: 2017-07-28
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 19:13
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)
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