WOUND DOVETAIL WEDGE FOR MARINE PROPELLER RETENTION
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United States of America Patent
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app pub date -
Oct 17, 2016
filing date -
Oct 17, 2016
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Abstract
A marine propeller composite blade an axially extending composite blade root including a dovetail wound in a partial spiral or helix around a centerline. Dovetail tapering down in width between clockwise and counter-clockwise dovetail sides of dovetail from dovetail bottom in a radially outwardly direction away from centerline. Marine propeller may include composite blade roots mounted in axially extending hub slots in a metallic hub, axially extending wedges disposed within the hub slots circumferentially between the blade roots and one of clockwise slot sides and counter-clockwise slot sides, and the wedges abutting the blade roots and the one of clockwise slot sides and counter-clockwise slot sides. Wedges and hub slots wound in a partial spiral or helix around a centerline. Radial retention means for radially retaining wedges in hub slots may include bolts engaging wedges and screwed into threaded holes in hub.
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