Foldable propeller
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Dec 30, 1980
Grant Date -
N/A
app pub date -
Feb 6, 1979
filing date -
Feb 6, 1978
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A foldable boat propeller comprising a hub to which the propeller blades are pivotally connected and which has two mutually turnable portions, one of which is fixedly secured to the propeller shaft and has a cam surface whereas the other one carries the propeller blades, and an axially shiftable plunger member which is mechanically connected to the propeller blades and unfolds them to working position on relative turning of the hub portions and axial shifting of said plunger means in response thereto only when the propeller shaft is driven in the reverse propulsion direction. Said plunger means is released for blade unfolding by centrifugal and water thrust force when the propeller shaft is driven in the forward propulsion direction.
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