Water cooled electric fuel pump for marine propulsion

Details Water cooled electric fuel pump for marine propulsion Water cooled electric fuel pump for marine propulsion

1999-05-10

2001-11-27

Swinehart, Ed (Department: 3617)

Marine propulsion

Means for accomodating or moving engine fluids

Cooling for engine

Reexamination Certificate

active

06322410

ABSTRACT:

BACKGROUND OF THE INVENTION
1. Field of the Invention
The subject invention relates to a marine propulsion system in which the supply of fuel is cooled to prevent fuel vapors by cooling the fuel pump.
2. Description of the Prior Art
It is well known in the art to cool the fuel pump which supplies fuel to an engine of a watercraft. An example of such a system is disclosed in U.S. Pat. No. 5,438,962 to Iwata et al. Other systems are disclosed in U.S. Pat. No. 3,835,822 to Mickle et al and U.S. Pat. No. 5,555,855 to Takahashi. These systems teach the cooling of the fuel by use of cooling water which is commingled with the cooling water for the engine.
SUMMARY OF THE INVENTION AND ADVANTAGES
The invention involves the cooling of a fuel pump for a marine engine in a watercraft disposed in environmental water by pumping water from the environmental water in which the watercraft is disposed with power from the marine engine and directing the water around the fuel pump as cooling water and thereafter dumping the cooling water from the fuel pump back to the environmental water.
Accordingly, the subject invention provides a unique jacketed fuel pump for maximizing cooling in a marine propulsion engine and the concept of using the environmental water independently of the cooling water for the engine.


REFERENCES:
patent: 3835822 (1974-09-01), Mickle et al.
patent: 4728306 (1988-03-01), Schneider
patent: 5438962 (1995-08-01), Iwata et al.
patent: 5555855 (1996-09-01), Takahashi
patent: 5647331 (1997-07-01), Swanson
patent: 5803036 (1998-09-01), Takahashi et al.

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