Marine propulsion device including cathodic protection
AssigneeOutboard Marine Corporation
InventorDouglas B. Guinn
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Abstract
The marine propulsion device lower unit includes a housing having a lower portion submerged in water and defining an internal passage communicating with the water. Corrosion protection for both internal and external parts of the lower unit is provided by a sacrificial, galvanic-type anode mounted on the submerged portion of the housing and including a first or outer portion having a surface exposed to water exterior to the lower unit and a second or inner portion having a surface exposed to water present in the passageway.
Claims9
A lower unit for a marine propulsion device comprising a housing having a lower portion with an outer surface which is normally submerged in water and with an inner surface defining an internal passage which communicates with the water and which is exposed to water when the lower portion is submerged in water, and a sacrificial anode mounted on said submerged lower portion of said housing and including a first portion having a first surface which constitute a part of said outer surface of said lower portion and which is exposed to water exterior to said housing and a second portion having a second surface which constitutes a part of said inner surface of said lower portion and which is exposed to water present in said passageway.
Dependencies are inferred from the claim text.