Fluid reaction surfaces (i.e. – impellers) – Specific drive or transmission means – Hand mixers
Reexamination Certificate
2005-09-20
2005-09-20
Look, Edward K. (Department: 3745)
Fluid reaction surfaces (i.e., impellers)
Specific drive or transmission means
Hand mixers
C415S002100, C290S044000, C310S077000
Reexamination Certificate
active
06945752
ABSTRACT:
Wind power installations generally have an active drive for wind direction tracking. The active drive rotates the machine housing of the wind power installation in such a way that the rotor blades of the rotor are oriented in the direction of the wind. Multiple azimuthal drives are typically used for larger wind power installations. The present invention includes a wind power installation comprising a machine housing, a rotor with at least one rotor blade, and a displacement device for orientating the rotor in the direction of the wind. The displacement device has a three-phase asynchronous motor drive that is supplied with three-phase current and is at times or completely acted upon with direct current during the stoppage time of the machine housing. Thus improved displacement devices, such as azimuthal drives, are provided ensuring uniform load distribution for each drive and preventing unwanted torque fluctuations in the individual drives.
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Edgar Richard A.
Look Edward K.
Seed IP Law Group PLLC
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