Marine propulsion device with improved exhaust discharge
Patent 4871334 Issued on October 3, 1989. Estimated Expiration Date: 
August 4, 2008. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
August 4, 2008. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 1073920 2989022 3368420 3434447 3745964 Marine outdrive apparatus Patent #: 4645463 InventorAssigneeApplicationNo. 07/228322 filed on 08/04/1988US Classes:440/89R, Means for handling exhaust gas416/93AWater or marine propellersExaminersPrimary: Basinger, Sherman D.Attorney, Agent or FirmInternational ClassesF01N 7/12 (20060101)F01N 7/00 (20060101) F02B 61/04 (20060101) F02B 61/00 (20060101) AbstractA 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. | |
