Fluid reaction surfaces (i.e. – impellers) – Working member foldable – pivotable or collapsible to non-use... – Member movement in rotation plane
Patent
1982-11-09
1984-08-21
Powell, Jr., Everette A.
Fluid reaction surfaces (i.e., impellers)
Working member foldable, pivotable or collapsible to non-use...
Member movement in rotation plane
416158, B64C 1128
Patent
active
044667752
ABSTRACT:
A helicopter rotor having a rotor hub and a plurality of rotor blades includes for each blade a blade fold mechanism comprising a reversible rotary power source and a rack and pinion mechanism adapted to operate one or more lock pins and to fold the blades between an operational spread position and a folded position. Two embodiments of the invention are described and illustrated.
REFERENCES:
patent: 3343610 (1967-09-01), Vacca et al.
patent: 3369610 (1968-02-01), Dancik
patent: 3749515 (1973-07-01), Covington et al.
patent: 3750982 (1973-08-01), Gear
Powell Jr. Everette A.
Westland plc
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