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US 6,585,497 B2Granted
Cooling fan dust seal
AssigneeAdda Corp.
InventorHsin Mao Hsieh
Life of this patent
Estimating the term…
Abstract
A cooling fan dust guard has provided on the inner side of fan blades ribs and recess that mutually form an overcut height difference with a bushing opening so to prevent the airflow carrying dust an easy ingression and even keep off the flying dust from entering into the spindle.
Claims4
A cooling fan dust structure comprising:
- a frame having a motor base located in the center;
- a stator coil unit having a bottom end fixed to said motor base;
- a magnetic bit located on a top end of said stator coil unit;
- a fan blade unit provide with two or more concentrically spaced ribs protruding from a bottom side of said fan blade unit closest to said stator unit, such that a winding slit is formed between said ribs and said magnetic bit;
- and
- a spindle supporting said fan blade unit;
- a hollow bushing surrounded by said stator coil unit and extending above a top extent of said magnetic bit, such that a second winding slit is formed between the bottom side of the fan blade unit and said bushing;
- wherein an overcut height difference is established between the ribs and the bushing increasing the distance air has to flow to reach the spindle preventing ingression of dust.
5 more elements
A cooling fan dust structure comprising:
- a frame having a motor base located in the center;
- a stator coil unit having a bottom end fixed to said motor base;
- a fan blade unit provide with a recessed channel formed in a bottom side of said fan blade unit closest to said stator unit;
- and
- a spindle supporting said fan blade unit,
- a hollow bushing surrounded by said stator coil unit and extending above a top extent of said stator coil unit and penetrating into said recessed channel, such that a winding slit is formed between a bottom of said recessed channel and said bushing;
- wherein an overcut height difference is established between said recessed channel and said bushing thereby increasing the distance air has to flow to reach the preventing ingression of dust.
4 more elements
Dependencies are inferred from the claim text.