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1. US5064345 - Multi-sweep blade with abrupt sweep transition

Office
États-Unis d'Amérique
Numéro de la demande 07438774
Date de la demande 16.11.1989
Numéro de publication 5064345
Date de publication 12.11.1991
Numéro de délivrance 5064345
Date de délivrance 12.11.1991
Type de publication A
CIB
F04D 29/32
FMÉCANIQUE; ÉCLAIRAGE; CHAUFFAGE; ARMEMENT; SAUTAGE
04"MACHINES" À LIQUIDES À DÉPLACEMENT POSITIF; POMPES À LIQUIDES OU À FLUIDES COMPRESSIBLES
DPOMPES À DÉPLACEMENT NON POSITIF
29Parties constitutives, détails ou accessoires
26Rotors spécialement adaptés aux fluides compressibles
32pour pompes à flux axial
F04D 29/38
FMÉCANIQUE; ÉCLAIRAGE; CHAUFFAGE; ARMEMENT; SAUTAGE
04"MACHINES" À LIQUIDES À DÉPLACEMENT POSITIF; POMPES À LIQUIDES OU À FLUIDES COMPRESSIBLES
DPOMPES À DÉPLACEMENT NON POSITIF
29Parties constitutives, détails ou accessoires
26Rotors spécialement adaptés aux fluides compressibles
32pour pompes à flux axial
38Ailettes
CPC
F04D 29/386
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
DNON-POSITIVE-DISPLACEMENT PUMPS
29Details, component parts, or accessories
26Rotors specially for elastic fluids
32for axial flow pumps
38Blades
384characterised by form
386Skewed blades
F04D 29/326
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
DNON-POSITIVE-DISPLACEMENT PUMPS
29Details, component parts, or accessories
26Rotors specially for elastic fluids
32for axial flow pumps
325for axial flow fans
326comprising a rotating shroud
F05D 2240/307
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
05INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
DINDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
2240Components
20Rotors
30Characteristics of rotor blades, i.e. of any element transforming dynamic fluid energy to or from rotational energy and being attached to a rotor
307related to the tip of a rotor blade
Y10S 416/05
YSECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
10TECHNICAL SUBJECTS COVERED BY FORMER USPC
STECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
416Fluid reaction surfaces, i.e. impellers
05Variable camber or chord length
Déposants Airflow Research and Manufacturing Corporation
Inventeurs Kimball Richard
Titre
(EN) Multi-sweep blade with abrupt sweep transition
Abrégé
(EN)

A blade for a fan or blower which has an abrupt transition region between an inner blade region which has a negative leading edge sweep angle, and an outer blade region which is highly forwardly swept. The outer blade region is further characterized by a blade chord that increases with increasing radius. The fan provides a low pitch width and superior noise and efficiency trade-offs.