Propeller for boat
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Jan 14, 1997
Grant Date -
N/A
app pub date -
Oct 19, 1995
filing date -
Oct 20, 1994
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
In a propeller for a boat, a plurality of stationary blades and a plurality of variable blades are alternately disposed around an outer periphery of a propeller boss. Exhaust passages are formed in the propeller boss to axially pass through the propeller boss at location corresponding to the stationary blades. Despite the provision of the variable blade which is variable in diameter or pitch, the exhaust passage can be formed into a large sectional area in the blade boss without being obstructed by a blade shaft for the variable blade.
First Claim
Family
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Cited Art Landscape
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