US 2021/0231127 A1Published application

Fan

AssigneeDelta Electronics, Inc.

InventorsChiu-Kung Chen, Chao-Wen Lu

Life of this patent

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Abstract

A fan includes a motor base, a bearing, an impeller, a stator and a magnetic element. The motor base has a bearing stand in a center portion thereof. The impeller includes a metallic case, plural blades and a rotating shaft. A top surface of a top wall of the metallic case continuous with curved surface that defines part of a central opening, and a depth of the central opening is equal to a thickness of the top wall. The blades are disposed around an outer periphery of said metallic case. The rotating shaft is inserted into the central opening and penetrated through the bearing stand, wherein no raised ring structure is formed in the top wall, and the rotating shaft and the metallic case are jointed together by a laser welding process. The magnetic element is disposed on an inner wall of the metallic case and aligned with the stator.

Claims9

Dependent claims

A fan, comprising:

a motor base having a bearing stand in a center portion thereof;
a bearing accommodated within said bearing stand;
an impeller comprising:
a metallic case having a top wall and a sidewall extended axially from an outer periphery of said top wall, wherein said top wall has a central opening, a bottom surface, and a top surface, said top surface continuous with curved surface that defines part of the central opening, and a depth of said central opening from the top surface to the bottom surface is equal to a thickness of said top wall;
plural blades disposed around an outer periphery of said metallic case for driving axial airflow or radial airflow;
and
a rotating shaft inserted into said central opening and penetrated through said bearing stand, said rotating shaft is combined within said central opening by a laser welding process;
a stator disposed around an outer periphery of said bearing stand;
and
a magnetic element disposed on said metallic case and aligned with said stator.

7 more elements

Dependencies are inferred from the claim text.

Facts

Application: 17/230,711Filed 14 Apr 2021
Priority: TW 0991298103 Sep 2010
Published: 29 Jul 2021
Term ends: Not estimatedThe source records don’t support an estimate.

Classification13 codes

F04D 29/281
For centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps: for fans or blowers
F04D 17/16
Centrifugal pumps: for displacing without appreciable compression
F04D 25/0613
The electric motor being specially adapted for integration in the pump: the electric motor being of the inside-out type, i.e. the rotor is…
F04D 25/062
The electric motor being of the inside-out type, i.e. the rotor is arranged radially outside a central stator: details of the bearings

Family

Application13/224,323Continuation in part · filed 1 Sep 2011
Application15/983,607Division · filed 18 May 2018
Application17/230,711Division
Application15/983,607Continuation in part
US 11,022,136 B2Related patent
US 11,879,475 B2Related patent
US 2012/0057966 A1Published application
US 2018/0266434 A1Published application
US 2021/0231127 A1This patent

From the US filing history. Foreign family members aren’t listed.