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US 4,930,984 AGranted
Impeller
AssigneeRobert Bosch GmbH
InventorsBruno Kesel, Gerhard Zink, Karin Winter
Life of this patent
Estimating the term…
Abstract
An impeller comprises a central hub part, and a plurality of vanes extending from the central hb part, the plurality of vanes including two first neighboring vanes having a predetermined construction and at least one second vane located between the first vanes and having a construction which is different from the construction of the first vanes.
Claims5
An impeller comprising a central hub part;
- a plurality of first vanes extending from said central hub part and all having a sickle-shaped cross-section of a predetermined size, said first vanes being spaced from each other and having an end remote from said central hub part;
- a plurality of second vanes extending from said central hub part and all having a shaped cross-section different from said sickle-shaped cross-section of said first vanes, said shaped cross-section of said second vanes being the same for all second vanes, and each of said second vanes being located in a space between two adjacent first vanes and having an end remote from said central hub part;
- and a ring surrounding the ends of said first and second vanes and being connected with said ends.
Dependencies are inferred from the claim text.