Fluid reaction surfaces (i.e. – impellers) – With control means responsive to non-cyclic condition... – Responsive to condition of torque or thrust of device or...
Patent
1994-05-20
1996-02-27
Look, Edward K.
Fluid reaction surfaces (i.e., impellers)
With control means responsive to non-cyclic condition...
Responsive to condition of torque or thrust of device or...
416 87, 416 93A, 416134R, 416139, 416143, 416144, B63H 124
Patent
active
054944066
ABSTRACT:
A propeller for a boat having a plurality of recesses and a plurality of land portions arranged circumferentially alternately around an outer periphery of a propeller boss which is fitted over and connected to a propeller shaft. A boss of each of propeller blades and each of blade shafts disposed parallel to an axis of the propeller boss to rotatably support such propeller blade are accommodated in each of the recesses, and each of the land portions is provided with an exhaust passage extending axially through the land portion to permit an exhaust outlet in a body of a propelling device to be opened at a rear end face of the propeller boss. Thus, it is possible to discharge an exhaust gas from an engine through the inside of the propeller boss into water.
REFERENCES:
patent: 3275083 (1966-09-01), Allin
patent: 3565544 (1971-02-01), Marshall
patent: 4792279 (1988-12-01), Bergeron
patent: 4929153 (1990-05-01), Speer
patent: 5219272 (1993-06-01), Steiner et al.
Aihara Takao
Kimata Ryuichi
Nakazato Ikuo
Takada Hideaki
Honda Giken Kogyo Kabushiki Kaisha
Larson James A.
Look Edward K.
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