Patent Number: 6,299,495

Title: Airboat transmission, lubrication system, and associated method

Abstract: A gear-based airboat transmission is provided for driving a pair of coaxial, counter-rotating propellers. The transmission includes a fore output gear rotatably affixable within a housing and affixable to the inner shaft for rotating the outer propeller. An aft output gear is rotatably affixable within the housing and is affixable to the outer shaft coaxial with the inner shaft for rotating the inner propeller opposite the outer. The aft output gear is generally coaxial with the fore output gear. An intermediate gear shaft has a fore end and an aft end, and both ends are opposedly and rotatable affixable within the housing. This bracing confers additional stability to the transmission, conferring longer life and decreased vibration. An intermediate gear is mounted thereon, and is positioned in driving relation to the fore output gear. A drive gear is rotatably affixable within the housing and is affixed for corotation with a drive shaft. The drive gear has a fore portion that is positioned in driving relation to the intermediate gear and an aft portion that is positioned in driving relation to the aft output gear. Improved stability characteristics are imparted by supporting the drive shaft at two points within the case and also by positioning the drive and the output shafts in vertical alignment. The adaptability of the gear-based transmission to being coupled with an automobile engine confers improved noise and efficiency characteristics.

Inventors: Jordan; W. Bishop (Maitland, FL)

Assignee:

International Classification: B63H 7/00 (20060101); B63H 23/32 (20060101); B63H 23/00 (20060101); B63H 7/02 (20060101); B63H 5/00 (20060101); B63H 5/10 (20060101); B63H 023/00 ()

Expiration Date: 10/09/2018