Metal working – Method of mechanical manufacture – Impeller making
Reexamination Certificate
2008-12-18
2010-11-16
Bryant, David P (Department: 3726)
Metal working
Method of mechanical manufacture
Impeller making
C416S131000, C416S13200B, C416S147000, C029S256000, C029S258000, C029S259000
Reexamination Certificate
active
07832101
ABSTRACT:
A method and an assembly for fastening at least one screw nut to be tightened of a rotor blade bearing of a wind turbine are provided. A screw nut driver assembly is provided at a rotatable portion of the rotor blade bearing, the screw nut driver assembly being adapted to automatically tighten the at least one screw nut. The screw nut driver assembly is aligned with the screw nut to be tightened by rotating the rotatable portion with a pitch drive of the wind turbine. Then the screw nut is tightened using the screw nut driver assembly.
REFERENCES:
patent: 2372416 (1945-03-01), Fairhurst
Bryant David P
General Electric Company
Global Patent Operation
Taousakis Alexander P
Zhang Douglas D.
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