Fluid reaction surfaces (i.e. – impellers) – Radially extensible or retractible rotor working member – Having pitch adjustment
Patent
1993-02-19
1994-02-15
Look, Edward K.
Fluid reaction surfaces (i.e., impellers)
Radially extensible or retractible rotor working member
Having pitch adjustment
416 87, 416136, B63H 106
Patent
active
052861660
ABSTRACT:
An automatic centrifugal force variable pitch propeller assembly includes a plurality of propeller blades mounted within a housing, each of the propeller blades being mounted to permit limited radial travel in its entirety and simultaneous incremental rotation about its longitudinal axis, the limited radial travel of each of the propeller blades in its entirety being caused by a centrifugal force developed by rotation of the propeller assembly and extending between an inward position corresponding to rotation of the propeller assembly at an idle speed and outward position corresponding to rotation at a maximum speed. The propeller assembly includes a pitch change mechanism that is coupled to the shaft end of each of the propeller blades and is solely responsive to radial travel of each of the propeller blades, caused by the centrifugal forces developed by rotation of the propeller assembly, for causing an identical predetermined incremental rotation of each of the propeller blades about its longitudinal axis that is a nonlinear function of the radial travel of each of the propeller blades. The propeller assembly also includes a rigid mechanical interconnection between the shaft ends of each of the propeller blades to insure that the propeller blades travel radially in their entirety in concert with each other to provide fail safe operation of the propeller assembly.
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Hein William E.
Look Edward K.
Sgantzos Mark
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