초록 ▼

A marine propulsion device (1) includes a drive housing (6) to which is attached a suitable engine (4), the exhaust of which is pumped downwardly through a suitable passage (20) in the drive housing to adjacent a torpedo housing (7) carrying at least one propeller (9,10). A generally horizontal anti

A marine propulsion device (1) includes a drive housing (6) to which is attached a suitable engine (4), the exhaust of which is pumped downwardly through a suitable passage (20) in the drive housing to adjacent a torpedo housing (7) carrying at least one propeller (9,10). A generally horizontal antiventilation plate (8) is disposed above the torpedo housing, and a strut (22) extends between the plate and the torpedo housing, just forwardly of the upper portion of the propeller. Substantially all of the engine exhaust is forced by the engine from the drive housing passage for discharge into the path of the upper portion of the propeller. In one embodiment, substantially all of the exhaust passes through the strut and is discharged rearwardly therefrom into ventilating engagement with the forward face of the propeller. In another embodiment, a portion of the exhaust (31) is also discharged downwardly through the antiventilation plate onto the upper edge portion of the propeller.

대표청구항 ▼

In a marine propulsion device, the combination comprising: (a) a generally vertically extending drive housing (6) connected to a marine engine (4) and adapted to extend downwardly into the water, (b) a generally horizontal fore-to-aft extending torpedo housing (7) disposed at the lower end portion o

In a marine propulsion device, the combination comprising: (a) a generally vertically extending drive housing (6) connected to a marine engine (4) and adapted to extend downwardly into the water, (b) a generally horizontal fore-to-aft extending torpedo housing (7) disposed at the lower end portion of said drive housing, (c) propeller means designed for surface running and being mounted aft of said torpedo housing and drivingly connected through the latter and said drive housing to said engine, (d) a substantially closed-walled generally vertical engine exhaust passage (20) disposed in said drive housing and connected to said engine, said exhaust passage having a discharge portion at the lower passage end, (e) and essentially total exhaust discharge means (21,22) communicating with said exhaust passage discharge portion and disposed forwardly of said propeller means for discharging substantially all of the engine exhaust into the path of said propeller means to enhance performance of the latter.