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US 11,959,489 B2Granted
Banded cooling fan band having knit-line strength improvement
AssigneeRobert Bosch GmbH
InventorRay Cote
Life of this patent
Estimating the term…
Abstract
A fan includes a hub configured to be driven by motor to rotate about a fan rotational axis, blades that protrude radially from the hub and a band that surrounds the rotational axis and connects the tips of the blades. The band includes structurally-reinforcing thickened regions that protrude from outer surface of the band in a direction away from the hub. A thickened region is disposed between respective tips of each pair of adjacent blades. Each thickened portion bridges a knit-line of the band.
Claims10
A fan, the fan comprising:
- a hub configured to be driven by motor to rotate about a fan rotational axis;
- a band that surrounds the rotational axis and is concentric with the hub, the band including a leading end that faces a direction of airflow through the fan, and a trailing end that is opposed to the leading edge;
- and
- blades that protrude radially from the hub, each blade comprising a root that is connected to the hub and a tip that is connected to a hub-facing surface of the band, wherein
- a distance between the fan rotational axis and the band is constant for every location along a line that extends about the circumferences of the band, where the line is disposed on the hub-facing surface of the band at the band trailing end, and
- a radial dimension of the band is non-uniform along the line.
3 more elements
A fan, the fan comprising:
- a hub configured to be driven by motor to rotate about a fan rotational axis;
- a band that surrounds the rotational axis and is concentric with the hub, the band including a leading end that faces a direction of airflow through the fan, and a trailing end that is opposed to the leading edge;
- and
- blades that protrude radially from the hub, each blade comprising a root that is connected to the hub and a tip that is connected to a hub-facing surface of the band, wherein
- a distance between the fan rotational axis and the band is constant for every location along a line that extends about the circumferences of the band, where the line is disposed on the hub-facing surface of the band at the band trailing end,
- a radial dimension of the band is non-uniform along the line such that
- the radial dimension varies periodically along the circumference of the band, and
- the radial dimension has a maximum value at locations between adjacent blades and a minimum value at locations aligned with a blade.
5 more elements
Dependencies are inferred from the claim text.