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US 5,474,429 AGranted
Fluid-displacement apparatus especially a blower
OwnerGotz Heidelberg, Otto Stuckmanninventors
Life of this patent
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Abstract
A fluid-displacement apparatus, especially a blower, has a stator of an electric motor directly driving the impeller integrated in the flow passage housing while the rotor of the electric motor is surrounded by the stator and is mounted on the ends of the blades of the impeller or propeller.
Claims17
A fluid-displacement apparatus, comprising:
- a cylindrical flow duct of circular cross section having an axis;
- an impeller rotatable about said axis in said duct;
- a ring-shaped rotor of an internal-rotor electric motor formed on an outer periphery of said impeller;
- a stator of said electric motor integrated with said flow duct so that a wall of said stator surrounding said rotor is flush with a wall of said duct upstream of and downstream of said stator;
- and
- an outer ring bearing journaling said rotor in said duct.
3 more elements
Dependencies are inferred from the claim text.