Fluid reaction surfaces (i.e. – impellers) – Articulated – resiliently mounted or self-shifting impeller... – Including movement limit stop or damping means
Patent
1975-11-19
1978-06-13
Powell, Jr., Everette A.
Fluid reaction surfaces (i.e., impellers)
Articulated, resiliently mounted or self-shifting impeller...
Including movement limit stop or damping means
416142, B63H 120
Patent
active
040946142
ABSTRACT:
A propeller such as a ship's propeller or screw comprises at least one propeller blade, and a propeller drive shaft. The propeller blade is mounted on the propeller drive shaft by employing a hub having a free end secured on the propeller drive shaft. The hub is provided with a central bore in the free end thereof. A pivot axis is defined mounted within the hub and perpendicular to the axis of the drive shaft. The pivot axis comprises a pivot shaft.
The blade is pivotally mounted about the inner end of the blade freely about the pivot shaft, the pivot shaft intersecting the longitudinal direction of the blade. Abutment means for the blade are provided for limiting the free pivotal movement of the blade between two extreme positions at either side of the position in which the propeller blade extends substantially perpendicular to the axis of the shaft. The abutment means comprises a pair of abutment members secured in the bore to serve as abutments for the blades. The abutment members can be adjusted by a clasp nut mounted within the central bore. The abutment members are removably secured to the clasp nut, and has an abutment face for limiting the free pivotal movement of the blade.
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Ehrenskjold Nils Oluf
Munk Torben
Gori-Vaerk A/S
Powell Jr. Everette A.
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