Folding propeller with rubber hub

Fluid reaction surfaces (i.e. – impellers) – Articulated – resiliently mounted or self-shifting impeller... – Nonmetallic resilient mounting


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416 93A, 416142, B63H 124




Disclosed herein is a foldable propeller assembly adapted for connection to a drive shaft. The propeller assembly includes a propeller carrier having an open end portion defining an axially extending mounting socket for receiving the drive shaft and a hub end portion spaced from the open end portion. A pair of propeller blades are pivotally mounted on the hub end portion for movement from a folded-together, collapsed position to a radially outwardly extending operative position in response to rotation of the propeller carrier and for movement from the operative position to the collapsed position in response to cessation of rotation of the propeller carrier. The assembly also includes drive means for drivingly connecting the propeller carrier with the drive shaft for common rotation therewith, the drive means further including a resilient member interposed the mounting socket and the drive shaft for absorbing torque forces transmitted from the propeller carrier to the drive shaft when the propeller blades are moved from the collapsed position to the operative position in response to common rotation of the drive shaft and the propeller carrier.

patent: 2111245 (1938-03-01), Irgens
patent: 3002365 (1961-10-01), Liljequist
patent: 3113625 (1963-12-01), Conover
patent: 3563670 (1971-02-01), Knuth
patent: 3764228 (1973-10-01), Shook
patent: 3871324 (1975-03-01), Snyder
patent: 3876331 (1975-04-01), Denherder et al.
patent: 4086025 (1978-04-01), Astrand
patent: 4095919 (1978-06-01), Ehrenskjold et al.
patent: 4204806 (1980-05-01), Blanchard


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