Apparatus and method for providing oil circulation in a marine p

Details Apparatus and method for providing oil circulation in a marine p Apparatus and method for providing oil circulation in a marine p

1992-05-28

1993-08-17

Basinger, Sherman

Marine propulsion

Screw propeller

Propulsion unit casing

440 88, 440900, B63H 2136

Patent

active

052363805

ABSTRACT:
An apparatus and method for providing improved oil circulation in a marine propulsion system. A supply passage is formed in the gearcase, having its inlet in communication with a space located forwardly of the lower face of the driven gear located in the propeller shaft cavity. The supply passage communicates oil to a drive shaft housing supply passage, and communication between the drive shaft housing supply passage and the upper cavity formed in the drive shaft housing, within which are disposed the lower and upper gears and the input gear, is cut off. Oil flowing through the drive shaft housing supply passage is routed to the universal joint bearings, and temperature of oil at the universal joint bearings is significantly reduced. An improved top cover for placement on top of the drive shaft housing includes an inlet in the top cover for receiving circulating oil pumped by the upper driven gear, which is routed to a recess formed in the underside of the top cover for distribution throughout the upper area of the drive shaft housing. A return passage is formed in the drive shaft housing and the gearcase for routing oil back to the propeller shaft cavity.

REFERENCES:
patent: 3931783 (1976-01-01), Croisant
patent: 4764135 (1988-08-01), McCormick
patent: 4948384 (1990-08-01), Bland et al.
patent: 4950190 (1990-08-01), Meisenburg

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