EP 0021435 A1 19810107 - Air-powered motor and a rotor therefor.
Title (en)
Air-powered motor and a rotor therefor.
Title (de)
Luftgetriebener Motor und Rotor hierfür.
Title (fr)
Moteur à air et son rotor.
Publication
Application
Priority
US 5266979 A 19790627
Abstract (en)
The present invention is directed to an air-powered motor and a turbine rotor therefor which can be used to drive small power tools, such as a vacuum cleaner floor tool, a sander or a grinder, and in which the motor can be coupled to a household vacuum cleaner to provide a source of vacuum or forced air to drive the turbine rotor. The turbine rotor has a structure which substantially increases the efficiency of the motor as compared to prior art devices and, in particular, the motor comprises a housing having a turbine chamber, an air inlet and an air outlet. The turbine rotor is rotatably mounted in the chamber, the turbine rotor having a plurality of turbine blades extending from the outer surface of the rotor towards the interior thereof. A plurality of turbine buckets are formed in the rotor, the top and bottom of the buckets being formed by a semi-circular wall. The structural elements which form the buckets are positioned with respect to one another such that the bucket angle of the bucket beta </= 60 DEG , the bucket radius ratio <MATH> and the blade inlet angle alpha </= 27 DEG . Furthermore, the turbine rotor is balanced to further enhance the efficiency of the motor.
IPC 1-7
IPC 8 full level
A47L 9/04 (2006.01); F01D 1/34 (2006.01); F04D 17/04 (2006.01); F04D 29/28 (2006.01)
CPC (source: EP)
A47L 9/0416 (2013.01); F01D 1/34 (2013.01); F04D 17/04 (2013.01); F04D 29/28 (2013.01)
Citation (search report)
- DE 2203284 A1 19730802 - SUEDDEUTSCHE KUEHLER BEHR
- DE 2746202 A1 19790419 - DEIERLING HEINRICH
- FR 1103927 A 19551108
- US 4014625 A 19770329 - YAMAMOTO TERUO
- US 2962748 A 19601206 - MAGARIAN GERALD M
- US 3044100 A 19620717 - ZAIDAN JOSEPH P
Designated contracting state (EPC)
AT BE CH DE FR GB IT LI LU NL SE
DOCDB simple family (publication)
DOCDB simple family (application)
EP 80103626 A 19800626