Marine drives and methods of making marine drives so as to minimize deleterious effects of cavitation

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United States of America Patent

PATENT NO 11459074
SERIAL NO

17000532

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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A method is for making a marine drive for propelling a marine vessel in water. The method includes providing a gearcase; installing a propeller shaft assembly that extends forwardly from the gearcase; coupling front and rear propellers to the propeller shaft assembly, forwardly of the gearcase, such that rotation of the propeller shaft assembly causes rotation of the front and rear propellers, respectively, which thereby propels the marine vessel in the water; and reducing deleterious effects of cavitation on the gearcase by the combination of forming the gearcase with a wide trailing end portion, in particular to maintain pressure alongside the gearcase, and configuring the front and rear propellers so that the front propeller absorbs more torque/thrust load than the rear propeller during said rotation.

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Patent Owner(s)

Patent OwnerAddress
BRUNSWICK CORPORATION26125 N RIVERWOODS BLVD STE 500 METTAWA IL 60045

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Gunderson, Andrew C Fond du Lac, US 5 4
Koepsel, Roger E Oshkosh, US 20 197
Scherer,, III John O Oshkosh, US 14 37

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