Marine propulsion – Screw propeller – With means effecting or facilitating movement of propulsion...
Patent
1987-03-03
1988-07-05
Peters, Jr., Joseph F.
Marine propulsion
Screw propeller
With means effecting or facilitating movement of propulsion...
440 88, 123196AB, B63H 2138
Patent
active
047551550
ABSTRACT:
A marine propulsion device comprising a power head having an engine, a lower unit which carries the engine, the lower unit including a rotatably mounted propeller and a drive shaft housed within the lower unit and operatively coupled to the engine and to the propeller, a swivel bracket adapted for mounting to a transom bracket for affording vertical tilting movement of the swivel bracket about a generally horizontal axis, the swivel bracket having a generally vertical bore, and a tubular pivot shaft connected to the lower unit and supported within the vertical bore for rotation about a generally vertical steering axis, and including therein a fluid passage adapted to communicate with a source of fluid to be cooled, and a water passage located adjacent the fluid passage and adapted to communicate with a flow of water to cool the fluid in the passage. Preferably, the lower unit includes a water inlet connected to a water entry conduit, and a water outlet connected to a water exit conduit, and the tubular pivot shaft water passage is located adjacent the fluid passage and communicates with the lower unit water entry and exit conduits so that forward motion of the lower unit results in a flow of water through the water passage to cool the fluid in the fluid passage.
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Avila Stephen P.
Outboard Marine Corporation
Peters Jr. Joseph F.
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