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Publication numberDE2729297 A1
Publication typeApplication
Application numberDE19772729297
Publication date11 Jan 1979
Filing date29 Jun 1977
Priority date29 Jun 1977
Publication number19772729297, 772729297, DE 2729297 A1, DE 2729297A1, DE-A1-2729297, DE19772729297, DE2729297 A1, DE2729297A1, DE772729297
InventorsHeinfried Plettner
ApplicantHeinfried Plettner
Export CitationBiBTeX, EndNote, RefMan
External Links: DPMA, Espacenet
Desk or table top fan - has slots in blades to increase air vol. delivered without increase of speed
DE 2729297 A1
The desk or table top fan has an impeller with radial blades on a hub which is mounted directly on the shaft. There is a slot in each blade. The effect of the slot is to break up the air and thus increase the volume delivered by the fan to increase the cooling effect at periods of very high temperature. This avoids the expense of a special motor to operate the fan at high speed. The slot is preferably parallel to the axis of the blade but may also be perpendicular or inclined to the axis of the blade.
Description  available in
Claims  available in
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
EP0295353A1 *28 Sep 198721 Dec 1988Khammas, Achmed Adolf WolfgangRotorblade
International ClassificationF04D29/38
Cooperative ClassificationF04D29/38
European ClassificationF04D29/38
Legal Events
21 Jun 1979ODRequest for examination
22 Jan 1981OHNWithdrawal