Fluid reaction surfaces (i.e. – impellers) – Articulated – resiliently mounted or self-shifting impeller... – Axially displaceable rotary carrier
Patent
1993-09-23
1994-11-22
Look, Edward K.
Fluid reaction surfaces (i.e., impellers)
Articulated, resiliently mounted or self-shifting impeller...
Axially displaceable rotary carrier
416137, 416140, 416 45, B63H 300
Patent
active
053663438
ABSTRACT:
A self-adjusting variable-pitch propeller has a drive shaft rotatable about a shaft axis in a predetermined forward rotational sense, a hub carried on the drive shaft and limitedly rotatable relative thereto about the shaft axis both in the forward rotational sense and in an opposite backward rotational sense, and a spring operatively braced between the hub and the shaft for rotationally urging the hub on the shaft in the forward rotational sense. A plurality of blades projecting radially from the hub are each rotatable about a respective blade axis generally perpendicular to the shaft axis. Respective rods extending axially in the hub each have an inner end at a respective one of the blades and an outer end. Respective linkages connecting the inner ends of the rods to the respective blades angular displace the blades about the respective axes on relative displacement of the rods and hub. A coupling engaged between the shaft and the hub and to the outer ends of the rods displaces the rods relative to the hub axially or angularly to an extent corresponding to the relative rotation in the backward rotational sense against a force exerted on the hub by the spring.
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Dr. Alexander Landolt
Dubno Herbert
Larson James A.
Look Edward K.
Wilford Andrew
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