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| Number | Title | Issue Date |
| 7507129 | Marine propulsion machine having drive shaft An outboard motor S has: a first drive shaft 31 interlocked with an internal combustion engine, a second drive shaft 32 interlocked with the first drive gear 31, an output gear mechanism 50 driven by the second drive shaft 32, a pr... | 03/24/2009 |
| 7435147 | Breakaway skeg for a marine propulsion device A marine propulsion device is provided with a breakaway skeg having first and second attachment points. The first and second attachment points are configured to result in the second attachment points disengaging from a gear case or housing structure prior to the fir... | 10/14/2008 |
| 7431621 | Drive shaft supporting structure for a small boat, and personal watercraft incorporating same A drive shaft supporting structure for a small boat is provided which permits simplification of a hull and for which manufacturing productivity is increased. The drive shaft supporting structure includes a shaft-supporting member for rotatably supporting a drive sha... | 10/07/2008 |
| 7422500 | Upper gearset support for marine stern drive unit and method of modification A support for the upper drive shaft of a marine stern drive unit. The support has an axial body installable in the axial bore of the upper case. Retainers on the body are engageable with the upper case to secure the support in place. One or both retainers are axiall... | 09/09/2008 |
| 7413491 | Marine vessel propulsion structure and marine vessel driving apparatus In an outboard drive or an inboard-outboard drive, power generated by a single engine is transmitted in left and right directions from a main drive shaft, thereby finally causing left and right propellers to be rotated, the left and right propellers being arranged a... | 08/19/2008 |
| 7387553 | Marine drive unit overmolded with a polymer material A marine propulsion system drive unit is provided with a polymer layer to protect its outer surface from abrasion and corrosion. The polymer layer is injection molded around the outer surface of a metallic gear case structure or drive shaft housing to provide a coat... | 06/17/2008 |
| 7334501 | Gear case assembly with pressure-compensating function for marine propulsion machine A gear case forming a lower part of a marine propulsion machine is provided with a gear chamber for housing a bevel gear mechanism, used for transmitting power from a drive shaft to a propeller shaft. The gear chamber is connected to the bottom of a vertical drive s... | 02/26/2008 |
| 7322866 | Outboard engine An outboard engine comprises a power source inside a power source compartment. The power source room is formed by an upper cover and an undercover. A buoyant body is disposed outside the power source compartment, and has a lower surface wall in a position that is lo... | 01/29/2008 |
| 7220157 | Arrangement and method for parallel alignment of propeller shafts and means for parallel alignment An arrangement and method for parallel alignment of propeller shafts in a first and a second underwater housing arranged on the hull of a vessel, which underwater housings are arranged to rotate around an axis of rotation which is angled in relation to the propeller... | 05/22/2007 |
| 7172473 | Rudder indicator A rudder position indicator apparatus includes a cam mounted on a steering linkage of a watercraft. The steering linkage is or an outdrive. When the rudder or an outdrive is in a straight position, the cam activates a micro switch, which in turn, supplies a ground f... | 02/06/2007 |
| 7118432 | Outboard motor with cowling An outboard has a housing unit mounted on an associated watercraft. An engine is disposed on the housing unit. A cowling surrounds the engine. The cowling has an inlet port through which atmospheric air enters inside of the cowling. At least a substantial portion of... | 10/10/2006 |
| 7097522 | Water pickup configuration for a marine propulsion system A cooling system for a marine propulsion device provides a water flow directing device, which is generally annular in shape, which has a water inlet extending from it. The water flow directing device is attachable to a gear case of a marine propulsion device and is ... | 08/29/2006 |
| 7086836 | Dual rate torque transmitting device for a marine propeller A torque transfer mechanism for a marine propulsion system provides a connector mechanism, a first torque transfer mechanism, and a second torque transfer mechanism. A plurality of rods can provide the first torque transfer mechanism and a polymer component is shape... | 08/08/2006 |
| 7008279 | Drive shaft support structure for marine propulsion machine In a drive shaft support structure for a marine propulsion machine, a gear case is provided with a vertical drive shaft receiving, bore and a drive shaft driven by an internal combustion engine is supported for rotation in the drive shaft receiving bore. A gear case... | 03/07/2006 |
| 6966806 | Replaceable leading edge for a marine drive unit A marine propulsion device is made of first and second portions which are removably attachable to each other. The second portion is the leading edge portion of the nose cone and the drive shaft housing. It can also comprise a portion of the skeg. The second portion ... | 11/22/2005 |
| 6840828 | Expandable retaining ring assembly A retaining ring assembly and method of assembly is disclosed. A gearcase includes a propeller shaft housing that is retained in the gearcase. The propeller shaft housing is secured against rotational, radial, and axial movement by a retainer. The retainer has a gen... | 01/11/2005 |
| 6672917 | Process for improving an anodizing film, an anodizing film structure and an aluminum-alloy-made outboard engine A process for forming an improved anodizing film on the surface of an aluminum alloy material. The film is impregnated with an amorphous substance which fills pores formed in the film during its growth. If the film has a flaw reaching the aluminum alloy m... | 01/06/2004 |
| 6585546 | Methods and apparatus for retaining a propshaft support bearing housing in a gear case The present invention, in one aspect, relates to a propeller shaft housing for being secured in the gear case bore and configured for being securely engaged to the gear case bore by threaded screws that pass through bosses in the housing and into threaded... | 07/01/2003 |
| 6491588 | Upper case housing support tower for marine stern drive unit A support for the vertical drive shaft of a marine stem drive unit. The support is a generally tubular member of high quality steel or steel alloy which is threaded at its lower end. The upper end carries an external flange. The upper end defines an inter... | 12/10/2002 |
| 6413129 | Outboard drive housing cooling system An outboard motor includes a power head, driveshaft housing and lower unit, and employs a cooling system to cool the driveshaft housing. Portions of the driveshaft housing experience substantial heat transfer from the exhaust gases that pass through the d... | 07/02/2002 |
| 6350166 | Outboard engine with resonance-avoiding exhaust housing A propulsion system for a boat has a powerhead or a motor with an exhaust port for exhaust gases. The exhaust gases are exhausted through the propeller hub via an exhaust housing. The exhaust housing is a walled enclosure having an inlet, an internal volu... | 02/26/2002 |
| 6254443 | Replaceable tower support for a bearing race and drive shaft in a marine engine A housing for an outdrive is installed with a replaceable tower support for a ball bearing race through which the drive shaft rotates. When the bearing race becomes worn, rather than replacing the entire housing and installing a new bearing race, only the... | 07/03/2001 |
| 6234854 | Marine drive assembly A boat drive mechanism is constructed of an engine mounted in the boat; a propeller; a drive shaft having a front end connected to the engine and a rear end extending through the exterior of the transom; a propeller shaft having a rear end connected to th... | 05/22/2001 |
| 6234855 | Driveshaft housing for outboard motor A driveshaft housing for an outboard motor includes an improved construction. The outboard motor comprises a power head containing an engine, the driveshaft housing depending from the power head and containing a driveshaft, and a lower unit depending from... | 05/22/2001 |
| 6190220 | Protective cover and method for protecting a boat propeller shaft A protective cover and method for protecting a boat propeller shaft and gears within a lower gear housing of a boat includes a cone-shaped casing having an inner surface, an outer surface, a top, and an open bottom. The inner and outer surfaces have an ed... | 02/20/2001 |
| 6146223 | Marine propulsion unit with water inlets in all quadrants of the front portion of its torpedo-shape gearcase A marine propulsion device is provided with a water inlet system that comprises at least a plurality of frontal inlet openings at the tapered forward end of a gearcase portion of a housing structure. The water inlet system can be provided for an outboard ... | 11/14/2000 |
| 6116973 | Apparatus and methods for preventing relative side to side motion between a propshaft housing and a gear case A wedge for preventing relative side to side motion between the propshaft housing and the gear case of an outboard engine is described. The wedge is configured to be located between the propshaft housing and the gear case bore inner diameter surface so th... | 09/12/2000 |
| 6053783 | Hub assembly for water jet propulsion unit Hub assembly for the journalling of an impeller (4) or drive shaft end (3) in the pump housing (2) of a water jet propulsion unit for propulsion of a vessel. The hub assembly forms a separate, integrated assembly (6) which as a single unit can be assemble... | 04/25/2000 |
| 6029540 | Power output system for an outboard engine A flange portion formed on an inner periphery of a flywheel is facet-fitted to an end of a crankshaft. A spline piece is facet-fitted to an inner peripheral surface of the flywheel. The flange portion of the flywheel and a flange portion of the spline pie... | 02/29/2000 |
| 5931711 | Outboard engine component mounting An outboard motor incorporating a mounting assembly for resiliently connecting the steering shaft to the driveshaft housing. The mounting assembly also includes locating an attachment bracket on the driveshaft housing juxtaposed to a box shaped section of... | 08/03/1999 |
| 5820425 | Outboard drive lower unit A lower unit for an outboard drive has an elongated length in order to present a streamline shape while providing sufficient width to house a transmission for a counter-rotational propeller system with a forwardly-oriented clutch element. One of the clutc... | 10/13/1998 |
| 5800224 | Splash and anti-cavitation plate for marine drive An integrated splash and anti-cavitation plate is provided for an outboard motor. The integrated plate decreases the overall weight of the outboard motor in order to improve the motor's performance. The decreased weight also lessens the load on the mounti... | 09/01/1998 |
| 5766046 | Cooling water pickup for marine propulsion unit An improved water pickup arrangement for a marine propulsion device for picking up cooling water for the propelling, water-cooled internal combustion engine. The lower unit has a bullet-shaped portion and the water inlet openings are formed at the forward... | 06/16/1998 |
| 5713772 | Cooling arrangement for outboard motor A number of embodiments of four-cycle internal combustion engines having belt-driven overhead cam shafts. The power head of the outboard motor includes a protective cowling that has an atmospheric air inlet and the air drawn through this atmospheric air i... | 02/03/1998 |
| 5558548 | Propeller drive for boats Propulsion unit for marine vessels with a gear or bearing housing (6) in which a propeller shaft (7) with a surface-breaking propeller (8) is carried. In a horizontal plane the propeller shaft forms an angle () to a guide fin (9) so as to create a ... | 09/24/1996 |
| 5536188 | Nose cone method and apparatus A nose cone attachment for an outboard motor propeller gearcase has a molded polymer housing shaped to fit over the front and sides of an outboard propeller gearcase and has an aerodynamic nosepiece shape on the front thereof with a plurality of water inl... | 07/16/1996 |
| 5505642 | Nautical propulsion performance enhancer A nautical propulsion performance enhancer for a propeller of a marine propeller type propulsion system, comprising a facility for twisting and directing a flow of water into the propeller, in such a manner that swirling water will hit the propeller in a ... | 04/09/1996 |
| 5376031 | Marine drive with surfacing torpedo A marine drive (10) has two counter-rotating surface operating propellers (12 and 14). The lower horizontal torpedo portion (188) of the housing (20) has an upper zone (276) with outer surface profiles (11T-17T) along horizontal cross-sections defining we... | 12/27/1994 |
| 5344350 | Compact outboard marine drive An outboard marine drive (10) has a powerhead (20) including an internal combustion engine (22), an adaptor plate (24) mounted to the engine, and a lower gearcase (26) including a torpedo housing (28) rotatably mounting a propeller (30), wherein the lower... | 09/06/1994 |
| 5340345 | Water pickup and cooling apparatus for boat drive systems An apparatus for cooling a stern mounted drive on a boat, comprising a water pickup for gathering water from the body of water in which the boat is operating, and a spray nozzle that directs a stream of cooling water towards the outer surface of the housi... | 08/23/1994 |
