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| Number | Title | Issue Date |
| 7635252 | Shock absorbing device for watercraft propeller A shock absorbing device for a watercraft propeller is provided that can include an outer tube unitarily formed with blades of a propeller. An inner tube can be coupled with a propeller shaft. An intermediate tube can be positioned between the outer tube and the inn... | 12/22/2009 |
| 7429163 | Performance propeller The invention relates to a propeller and an apparatus to modify a propeller that provide new propeller performance characteristics. In a preferred embodiment, the propeller includes two blade sets wherein the blades in the sets of distinct geometries from the blades... | 09/30/2008 |
| 7290738 | Dual jet emerging lift augmentation system for airfoils and hydrofoils Separate upper and lower plenums within an aircraft airfoil or a sea hydrofoil conduct fluid under different pressures to nozzle slots from which jets emerge to augment lift in accordance with different travel conditions. Lift is induced by nozzle slot emergence of ... | 11/06/2007 |
| 7241117 | Motor shaft assembly and method A method for assembling a motor shaft with a bearing, a motor housing, and an impeller is disclosed. A motor shaft extension is used to retain the impeller axially on the motor shaft and allows the motor shaft to drive an additional component, such as an impeller, l... | 07/10/2007 |
| 7153101 | Pulling marine propeller A pulling marine propeller (1) including multiple propeller blades (4) attached to a propeller hub (5). The propeller hub (5) is attachable to a propeller shaft (9) extending from a drive housing (10) located downstream of t... | 12/26/2006 |
| 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 |
| 7056092 | Modular propeller A modular propeller comprises a center hub with an integrated front cap and an aluminum core encapsulated with fiber-reinforced composite polymer resin. A set of replaceable blades have bases that slip into and interlock with corresponding slots in the center hub. A... | 06/06/2006 |
| 7056091 | Propeller hub assembly having overlap zone with optional removable exhaust ring and sized ventilation plugs A propeller hub assembly having a through-hub exhaust propeller hub characterized by an interior overlap zone defined by the composite interior dimensions of a selected number of conventional propeller hubs and optionally fitted with a removable exhaust ring and/or ... | 06/06/2006 |
| 6940185 | Advanced aerodynamic control system for a high output wind turbine An advanced aerodynamic control system for a wind turbine including a drive shaft and blade. The control system includes an air control system coupled to a duct that extends from a first end toward a second end of the blade. A slot extends along a portion of a surfa... | 09/06/2005 |
| 6835047 | Labyrinth seal adapter for marine propeller A seal adapter for reducing the escape of exhaust gases between an outboard motor and a propeller includes a substantially hollow cylindrical connecting member (71) having a shoulder (84) for dividing the connecting member (70) into a plurality ... | 12/28/2004 |
| 6672834 | Removable propeller assembly incorporating breakaway elements A propeller assembly is provided for mounting on a rotatable propeller shaft of a marine vehicle. The propeller assembly includes a central adaptor mounted on the propeller shaft for rotational movement therewith. A tubular propeller housing is slidable o... | 01/06/2004 |
| 6659818 | Shock-absorbing propeller assembly A method and apparatus is disclosed for connecting a drive axle to a propeller. A drive member is configured to mount on a drive axle, a tubular member is coupled to the propeller, and a resilient member is configured to be positioned between the drive me... | 12/09/2003 |
| 6644926 | Vane structure for a propeller A vane structure for a propeller for engaging fluid and preventing cavitation or the rapid formation and collapse of low-pressure gas bubbles in a liquid. The vane structure for a propeller includes a plurality of spaced vanes that are mounted to and exte... | 11/11/2003 |
| 6506019 | Boat propeller capable of being easily changed in pitch thereof A boat propeller comprises a hub formed of a front cylindrical member and a rear cylindrical member. The hub is provided in the joining place with a plurality of receiving cavities which are arranged equiangularly and circularly. Each cavity is provided r... | 01/14/2003 |
| 6478543 | Torque transmitting device for mounting a propeller to a propeller shaft of a marine propulsion system A torque transmitting device for use in conjunction with a marine propulsion system provides an adapter that is attached in torque transmitting relation with a propulsor shaft for rotation about a central axis of rotation. The first insert portion is atta... | 11/12/2002 |
| 6358008 | Propeller assembly for a marine vehicle A propeller assembly is provided for mounting on a rotatable propeller shaft of a marine vehicle. The propeller assembly includes a central hub mounted on the propeller shaft for rotation therewith. A generally tubular propeller housing is slidable on the... | 03/19/2002 |
| 6354802 | Propeller assembly including a spiral wound spring A propeller assembly that includes, in an exemplary embodiment, a spring for securing a propeller to a propeller shaft is described. In the exemplary embodiment, the propeller assembly includes a thrust bearing which tightly fits to an inclined surface of... | 03/12/2002 |
| 6312223 | Marine propeller A marine propeller includes a hub defining an axial direction of the propeller, a plurality of adjustable propeller blades disposed around the hub, and a blade setting adjusting arrangement. Each blade includes a blade-part and a root-part, the root-part ... | 11/06/2001 |
| 6267634 | Propeller flare A propeller flare having a periodic shape and extending from the aft end of the propeller hub is described. The periodic shape of flare provides that the trailing edge, or aft end, of the propeller hub is increased only at locations where such increased m... | 07/31/2001 |
| 6210110 | Propeller having a stress relief flare arrangement A propeller including, in one embodiment, a flare having a sinusoidal, or tulip, shape is described. The flare is located at a trailing edge of the propeller, and the sinusoidal flare shape of the propeller trailing edge has reduced stresses as compared t... | 04/03/2001 |
| 6168485 | Pump jet with double-walled stator housing for exhaust noise reduction A pump jet apparatus having a double-walled stator housing containing an annular passage through which exhaust gas can flow. Gas enters the annulus through an exhaust gas inlet or port formed in the outer stator shell at the top of the stator housing, flo... | 01/02/2001 |
| 6053700 | Ducted turbine A turbine 400 has a central duct 410 which accelerates fluid passing through it and a blade configuration which retards the flow of fluid near the tips of the turbine. This structure results in a vortex having a higher fluid pressure behind the tips of th... | 04/25/2000 |
| 6010380 | Marine exhaust vented forward of propeller hub An exhaust system for marine propulsion units passes engine exhaust gas out through lateral holes in the lower unit casing at the level of the propeller shaft that communicate between an exhaust passage in the propeller-shaft-support unit and the ambient ... | 01/04/2000 |
| 5967753 | Controllable-pitch propeller, especially for sport boats and other watercraft A controllable-pitch propeller for a sport-type watercraft has a push rod eccentrically connected to each blade displaceable in a bore of the propeller hub. The push rod is sealed with respect to the end of that bore by a multifold bellows whose radial fl... | 10/19/1999 |
| 5967751 | Propeller assembly for marine engine A propeller device includes a shaft rotatably supported in a marine engine, and a hub secured to the shaft and having three or more axially extending keys. A propeller housing includes three or more pairs of lobes for forming keyways and for engaging with... | 10/19/1999 |
| 5916003 | Propeller vent plug with fluid passage A propeller device is provided with vent apertures and plugs which fit into the vent apertures to be retained in position during use of the propeller device. The vent plugs are provided with openings therethrough so that fluids can flow from a region with... | 06/29/1999 |
| 5908284 | Marine propeller with tube shape shock absorbing means A propeller is made up of a propelling unit having a plurality of blades, a driving unit for driving the propelling unit, and a plurality of deformable transmission units located between the propelling unit and the driving unit such that the transmission ... | 06/01/1999 |
| 5816869 | Propeller for varying the exhaust length A propeller for a marine propulsion system that provides variable length exhaust paths depending upon the speed of the boat and motor. The propeller includes a propeller hub and an exhaust tube positioned within the propeller hub. The exhaust tube extends... | 10/06/1998 |
| 5800123 | Bladed pump capstan An apparatus for tensioning a subsurface float line and the like during doyment of the line and thereafter includes a capstan rotatably mounted and located in a liquid medium, the capstan having a bore extending from one end of the capstan to the other e... | 09/01/1998 |
| 5727381 | Duct flow control system A duct fixed to a vehicle propelled through an ambient fluid medium is innally provided with spaced channel passages from which the fluid medium is ejected under pressure tangentially of local duct surfaces through Coanda affected slots at the trailing e... | 03/17/1998 |
| 5630704 | Propeller drive sleeve with asymmetric shock absorption A shock absorbing drive sleeve (402, FIGS. 28+) mounts a marine drive propeller (12) to a propeller shaft (22) and has an asymmetric spring rate such that the sleeve has a higher spring rate and greater torque bearing capability for the forward boat direc... | 05/20/1997 |
| 5593280 | Propeller for boat In a propeller for a boat, a plurality of stationary blades and a plurality of variable blades are alternately disposed around an outer periphery of a propeller boss. Exhaust passages are formed in the propeller boss to axially pass through the propeller ... | 01/14/1997 |
| 5562413 | Variable propeller for boat A plurality of blade shafts spline-connected to bosses of a plurality of propeller blades are rotatably carried on a propeller boss parallel to the axis of the boss, the propeller blades being rotated so as to increase the propeller-diameter D according t... | 10/08/1996 |
| 5549455 | Through the hub exhaust flow improvements for marine variable pitch propeller This invention provides a variable pitch marine propeller which is replaceable onto the drive shaft of a marine engine and which provides an exhaust channel through the propeller. To improve and increase the flow of exhaust gas through the propeller the p... | 08/27/1996 |
| 5527195 | Flow through marine propeller A marine propeller (10) has an integral aft skirt portion (30, 74) with a plurality of slots (34, 36, 38, 40, 42, 44) extending forwardly from the trailing end (32, 72) and dividing the skirt portion into a plurality of circumferentially spaced segments (... | 06/18/1996 |
| 5494406 | Propeller for boat A propeller for a boat having a plurality of recesses and a plurality of land portions arranged circumferentially alternately around an outer periphery of a propeller boss which is fitted over and connected to a propeller shaft. A boss of each of propelle... | 02/27/1996 |
| 5484264 | Torsionally twisting propeller drive sleeve and adapter A marine drive having a drive sleeve and a drive sleeve adapter between the propeller shaft and the propeller hub where the drive sleeve absorbs the shock of the propeller striking an object by torsionally twisting a forward end of the drive sleeve which ... | 01/16/1996 |
| 5464321 | Marine propeller A marine propeller using the circulation control principle of blowing tantially over a Coanda surface at the trailing edge of each blade to develop high blade lift (thrust). Each blade has internal chambers and two blowing slots so that blowing is contro... | 11/07/1995 |
| 5423701 | Propeller arrangement for a marine propulsion unit A double propeller arrangement for a marine propulsion unit, for example of the type which includes a so-called stern-drive. Each propeller has a hub consisting of an inner sleeve with splines for attachment to a propeller shaft, an outer sleeve with prop... | 06/13/1995 |
| 5421756 | Exhaust system for the marine propulsion machine The present invention provides an exhaust gas discharge system for a watercraft. The system has a first discharge path, including a first outlet, primarily for use during high speed vessel operation and a second discharge path, including a second outlet, ... | 06/06/1995 |
