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US 9,810,234 B2Granted
Fan impeller
AssigneePunker GmbH
InventorsHenning Bähren, Christian Hornhardt, Matthias Wolf, Yingan Xia
Life of this patent
Estimating the term…
Abstract
A fan impeller for the conveyance of a gaseous fluid includes several blades arranged with constant angular spacing around a rotation axis. At least one blade has a boundary zone and an inner zone, together with a bead extending between them along a curved path and/or the boundary zone is determined by a first blade surface and the inner zone is determined by a second blade surface, which are arranged with varying geometry.
Claims22
A fan impeller for conveying a gaseous fluid, comprising:
- first and second supports;
- and
- a plurality of deep-drawn sheet-metal blades having first and second axial end sections, each of the blades extending between the first and second supports and being respectively affixed to the first and second supports along the first and second axial end sections, the blades being arranged with a constant angular spacing in an annular space around a rotation axis;
- wherein at least one of the blades comprises a sheet-metal part shaped to have a continuous boundary zone extending along a periphery of the blade and at least one inner zone surrounded by the boundary zone;
- and
- wherein the sheet-metal part further comprises at least one bead that lies between the boundary zone and the inner zone along a curved path having at least a portion that is substantially L-shaped.
3 more elements
A fan impeller for conveying a gaseous fluid, comprising:
- first and second supports;
- and
- a plurality of blades having first and second axial end sections, each of the blades extending between the first and second supports and being respectively affixed to the first and second supports along the first and second axial end sections, the blades being arranged with a constant angular spacing in an annular space around a rotation axis;
- wherein at least one of the blades has a continuous boundary zone extending along a periphery of the blade and at least one inner zone surrounded by the boundary zone;
- and
- wherein at least one bead lies between the boundary zone and the inner zone along a curved path having at least a portion that is substantially L-shaped, the bead having a constant width and a constant depth along the curved path.
3 more elements
Dependencies are inferred from the claim text.