Cooling system for an outboard motor

Internal-combustion engines – Cooling – With cooling of additional parts or materials

Reexamination Certificate

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C123S1950HC, C440S08800J, C060S320000

Reexamination Certificate

active

07128027

ABSTRACT:
A cooling system of an outboard motor provides back and forth flow of water from one side of an exhaust passage to the opposite side in order to avoid the creation of stagnant pools of water within which minerals and debris can collect. This result is accomplished by causing the cooling water to flow back and forth from one side of the exhaust passage to the other so that all portions of the water passages are forced to conduct water through them at a relatively high velocity. A water reservoir is formed between an exhaust conduit and an oil reservoir in order to reduce the operating temperature of the oil within the reservoir.

REFERENCES:
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patent: 5037340 (1991-08-01), Shibata
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patent: 5232387 (1993-08-01), Sumigawa
patent: 5462464 (1995-10-01), Ming
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patent: 6039618 (2000-03-01), Hiraoka et al.
patent: 6367442 (2002-04-01), Takayanagi
patent: 6655341 (2003-12-01), Westerbeke
patent: 6699086 (2004-03-01), Belter et al.
patent: 6913498 (2005-07-01), Sheth
patent: 2004/0198110 (2004-10-01), Sumigawa et al.

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