Marine exhaust elbow structure with enhanced water drain capability
AssigneeBrunswick Corporation
InventorsMatthew W. Jaeger, Cindy J. Minor
Life of this patent
Estimating the term…
Abstract
An exhaust elbow for a marine propulsion system is provided with a stainless steel tube within a water outlet opening to assure that a drain opening remains open even when the exhaust elbow is exposed to a corrosive environment. Since cast iron tends to expand in volume as a result of corrosion of its surface areas, water outlet openings intended to perform a draining function can be partially or fully closed as a result of corrosion. The insertion of a stainless steel tube in one or more water outlet openings of an exhaust elbow assures that an internal water cavity of the elbow can drain when the associated internal combustion engine is turned off, thereby minimizing the possibility of freeze damage to the exhaust components.
Claims19
An exhaust gas conducting system for a marine propulsion system, comprising:
- an exhaust conducting structure made of a first material;
- an exhaust gas cavity formed within said exhaust conducting structure of said exhaust gas conducting system, said exhaust gas cavity having an exhaust inlet opening and an exhaust outlet opening;
- a water cavity formed within said exhaust conducting structure, said water cavity being disposed in thermal communication with said exhaust gas cavity, said water cavity having a water inlet opening and a water outlet opening;
- and
- a tube disposed within said water outlet opening and in fluid communication with said water cavity, said tube being made of a second material, said first material being different than said second material, said exhaust conducting structure being an exhaust elbow.
An exhaust gas conducting system for a marine propulsion system, comprising:
- an exhaust elbow made of a first material;
- an exhaust gas cavity formed within said exhaust elbow of said exhaust gas conducting system, said exhaust gas cavity having an exhaust inlet opening and an exhaust outlet opening;
- a water cavity formed within said exhaust elbow, said water cavity being disposed in thermal communication with said exhaust gas cavity, said water cavity having a water inlet opening and a water outlet opening;
- and
- a first tube disposed within said water outlet opening and in fluid communication with said water cavity, said first tube being made of a second material, said first material being different than said second material.
An exhaust gas conducting system for a marine propulsion system, comprising:
- an exhaust elbow made of a first material;
- an exhaust gas cavity formed within said exhaust elbow of said exhaust gas conducting system, said exhaust gas cavity having an exhaust inlet opening and an exhaust outlet opening;
- a water cavity formed within said exhaust elbow, said water cavity being disposed in thermal communication with said exhaust gas cavity, said water cavity having a water inlet opening and a water outlet opening;
- a first tube disposed within said water outlet opening and in fluid communication with said water cavity, said first tube being made of a second material;
- and
- a second tube disposed within said water outlet opening and in fluid communication with said water cavity, said second tube being made of said second material, said first material being different than said second material.
Dependencies are inferred from the claim text.