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US 8,985,970 B2Granted
Axial ventilator
AssigneeSpal Automotive S.R.L.
InventorsAlessandro Spaggiari, Pietro De Filippis
Life of this patent
Estimating the term…
Abstract
A ventilator (1) comprises an electric motor (2) comprising a casing (4), a rotor rotatable inside the casing (4) about an axis of rotation (R), a shaft (5) integral with the rotor and having at least one end portion (6) protruding from the casing (4); the ventilator (1) comprises a fan equipped with a plurality of blades (7), a hub (8) for mounting the blades (7) and comprising a bottom wall (9) for coupling to the shaft (5) and at least one perimeter portion (11) extending from the bottom wall (9) to define a base for connecting the blades (7); the hub (8) is defined by a rigid disc (8) and comprises a plurality of bases (11a) which extend from the bottom wall (9) at each of the blades (7) to define a connecting surface for joining each blade (7) to the bottom wall (9).
Claims20
A ventilator comprising
- an electric motor comprising a casing,
- a rotor rotatable inside the casing about an axis of rotation,
- a shaft integral with the rotor and having at least one end portion protruding from the casing, and
- a single piece integrally molded plastic molded fan associated with the end portion, the fan comprising:
- a plurality of blades, and
- a hub for mounting the blades, the hub comprising a bottom wall for coupling to the shaft and a perimeter portion extending from the bottom wall for connecting the blades, the perimeter portion comprising a plurality of bases extending from the bottom wall, one base at each of the blades to define a connecting surface for integrally joining each blade to the bottom wall, the perimeter portion being open between the plurality of bases, the bottom wall being a single disc having an axially inner side facing the motor and an exposed axially outer side facing away from the motor, the single disc being a sole connection between the perimeter portion and the coupling with the shaft;
- any structure on the axially inner side of the single disc extending in a direction toward the motor shaped to be at least one chosen from facing radially outwardly and inclined radially outwardly to assist in expulsion of material from between the single disc and motor by centrifugal force.
4 more elements
A ventilator comprising:
- an electric motor comprising a casing,
- a rotor rotatable inside the casing about an axis of rotation,
- a shaft integral with the rotor and having at least one end portion protruding from the casing,
- a fan associated with the end portion, the fan comprising a plurality of blades,
- a hub for mounting the blades, the hub comprising a bottom wall for coupling to the shaft and at least one perimeter portion extending from the bottom wall to define a base for connecting the blades,
- a closing device for closing the hub to form a box-shaped body, the closing device comprising a cover for closing the perimeter portion on an opposite side with respect to the bottom wall to form the box-shaped body,
- a stop device operating on the cover to keep the cover stably associated with the hub, the stop device comprising a first engagement mechanism extending from the bottom wall towards the cover and a second engagement mechanism extending from the cover to securely clasp the first engagement mechanism, and
- a locking device for fastening the first engagement mechanism to the second engagement mechanism;
- wherein the first engagement mechanism comprises at least a first and a second flexible element movable between a close-up position and a spaced-apart position, the second engagement mechanism comprising at least one pin positionable between the first and second flexible elements, the pin being retained by the first flexible element and by the second flexible element in the close-up position, the locking device comprising an elastic element operating on the first and second flexible elements to keep them in the close-up position.
6 more elements
A ventilator comprising
- an electric motor comprising a casing,
- a rotor rotatable inside the casing about an axis of rotation,
- a shaft integral with the rotor and having at least one end portion protruding from the casing,
- a fan associated with the end portion, the fan comprising:
- a plurality of blades, and
- a hub for mounting the blades, the hub comprising a bottom wall for coupling to the shaft and a perimeter portion extending from the bottom wall for connecting the blades, the perimeter portion comprising a plurality of bases extending from the bottom wall at each of the blades to define a connecting surface for integrally joining each blade to the bottom wall, the bottom wall being a single disc having an axially inner side facing the motor and an exposed axially outer side facing away from the motor, the single disc being a sole connection between the perimeter portion and the coupling with the shaft;
- any structure on the axially inner side of the single disc extending in a direction toward the motor shaped to be at least one chosen from facing radially outwardly and inclined radially outwardly to assist in expulsion of material from between the single disc and motor by centrifugal force, and
- wherein the bottom wall is defined by a frustoconical surface having a concavity facing the motor.
5 more elements
Dependencies are inferred from the claim text.