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| Number | Title | Issue Date |
| 8105046 | Propeller for watercraft and outboard motor A propeller for watercraft having excellent abrasion resistance includes a propeller body having a blade and a hub portion, the propeller body being molded by casting an aluminum alloy, and an anodic oxide coating provided so as to cover a surface of the propeller b... | 01/31/2012 |
| 7357686 | Boat propeller with adjustable blades for adjusting the pitch thereof A boat propeller comprises a hub formed of a first cylindrical member and a second cylindrical member detachably joined together. The second cylindrical member comprises a plurality of insertion cavities formed in the second cylindrical member, an end of each of the... | 04/15/2008 |
| 7223074 | Propeller shaft arrangement, propeller arrangement, adaptive arrangement and propulsion arrangement Apparatus for adapting a propeller system including a propeller shaft (15, 16) and a propeller (7, 8) adapted to be mounted on the propeller shaft (15, 16). The propeller system includes a propeller (7, 8) connected in a rotationally fixe... | 05/29/2007 |
| 7223076 | Propeller shaft and a propeller adapted thereto Propeller shaft (2) and a propeller (7) for marine drive units. The shaft has a splines portion (3) on which the propeller is designed to be fixed. The shaft also has a threaded portion (10) for a lock nut between the shaft end and the sp... | 05/29/2007 |
| 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 |
| 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 |
| 7011501 | Energy generating system A system (1) designed to generate energy with the aid of, primarily, sea currents, comprising a rotation body (4) having a front inlet side (2) and a rear outlet side (3), and at least one transfer member (6) connected between the ... | 03/14/2006 |
| 7008188 | 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 members is configured to be positioned between the drive member and t... | 03/07/2006 |
| 6773232 | Progressive shear assembly for outboard motors and out drives A progressive shear assembly which is suitably adapted for connecting a marine propeller to a propeller drive shaft in such a manner that a selected resilience and torsional resistance of the propeller with respect to the drive shaft is achieved. An adaptor shaft pr... | 08/10/2004 |
| 6685432 | Hub assembly for marine propeller A propeller assembly is provided for mounting in a rotatable propeller shaft of a water craft. The propeller assembly includes a hub structure extending along an axis and including an outer surface having a plurality of circumferentially spaced blades pro... | 02/03/2004 |
| 6609892 | Propeller hub A propeller assembly that includes a plastic bushing that is secured, e.g., bonded, to an inner hub and is configured to engage an outer hub of a propeller. More specifically, and in an exemplary embodiment, the bushing includes a cylindrical shaped body ... | 08/26/2003 |
| 6562206 | Anode assembly A propeller attachment is disclosed including a body, the body including an anodic material, at least one projection projecting from the body, and a fastener coupled to the body. An anode is also disclosed including an annular body constructed from an ano... | 05/13/2003 |
| 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 |
| 6471481 | Hub assembly for marine propeller A propeller assembly is provided for mounting on a rotatable propeller shaft of a watercraft. The propeller assembly includes a hub structure extending along a longitudinal axis. The hub structure includes an outer surface having a plurality of circumfere... | 10/29/2002 |
| 6390776 | Marine propeller A marine propeller with increased performance in reverse has a hub and a multiplicity of blades extending radially outward. A portion of the trailing edges of some or all of the blades are modified to lessen interference between blades and increase the bi... | 05/21/2002 |
| 6358007 | Universal constant speed variable pitch boat propeller system An adjustable pitch boat propeller system adapted for mounting on a drive shaft of a marine drive unit of a boat. The propeller includes an hub that has been adapted for mounting over the drive shaft of the boat, the hub having an external surface and int... | 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 |
| 6247897 | Vane system An improved vane system comprising of two or more vanes being part of a spherical section related to a hub characterized in that an operative concave surface of the vane being part of the spherical section. An operative convex surface of the vane being pa... | 06/19/2001 |
| 6234852 | Impeller for water jet pump of watercraft An impeller for a water jet pump of a watercraft having a structure so as to enhance pump efficiency, and to reduce manufacturing cost having a tip portion configured to be fixed to a propeller shaft for being rotated integrally with the propeller shaft, ... | 05/22/2001 |
| 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 |
| 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 |
| 6142735 | Variable-pitch propeller, especially for sport craft A variable-pitch propeller, especially for a sport board, has angularly displaceable blade support plates which can be rotated about respective radial axes. The plates are provided with radially inwardly directed claws which engage in circumferential groo... | 11/07/2000 |
| 6132857 | Hybrid component with high strength/mass ratio and method of manufacturing said component A high-strength hybrid component including a relatively soft first part made of a composite material including an organic matrix reinforced with fibers, a relatively hard second part made of metal, metal alloy, or ceramic, and a transition layer made of a... | 10/17/2000 |
| 6042333 | Adjustable pitch impeller An impeller has a plurality of rotating passageways which can be defined between adjacent blades, the blades having a curved root portion and able to pivot across a part spherical hub to maintain a fine line contact. The passageways have a convergence to ... | 03/28/2000 |
| 6009822 | Bow or stern thruster The bow or stern thruster is a steering device for commercial boats or for large yachting vessels. The thruster has a tunnel disposed transversely across either the bow or the stern of the boat. The tunnel has a tunnel flange secured to an opening in the ... | 01/04/2000 |
| 5997253 | Adjustable pitch propeller An adjustable propeller is provided with a receptacle on its hub which is shaped to receive a base portion of a propeller blade. First and second pluralities of alignment devices are provided to allow an operator to select a desired pitch angle and attach... | 12/07/1999 |
| 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 |
| 5759074 | Impeller mounting system for a personal watercraft An impeller mounting system for a jet propelled watercraft uses an impeller shaft having a tapered portion and an impeller hub having a coaxial opening with a corresponding tapered seat. The impeller hub is tightened onto the impeller shaft so that the ta... | 06/02/1998 |
| 5695370 | Motorboat propeller A motorboat propeller comprises a hub and a plurality of blades mounted on the hub. The hub comprises peripherally along the axis thereof a front segment, a midsegment and a rear segment. The hub has a hollow interior provided therein with a shaft tube ex... | 12/09/1997 |
| 5611718 | Auxiliary propelling device An auxiliary propelling structure can be attached to an existing propeller system including a propeller having a boss, a propeller shaft and a tightening nut screwed onto the end of the shaft. The auxiliary propelling structure includes an auxiliary boss ... | 03/18/1997 |
| 5573372 | Emergency enablement device for a boat propeller Disclosed is an apparatus for emergency enablement of a boat propeller. The apparatus includes a central mounting plate having an aperture for engagement with one end of the propeller shaft to which the propeller is attached. A drive plate is affixed to t... | 11/12/1996 |
| 5522743 | Marine propeller with rubber bushing having lobular configuration Disclosed herein is a marine propeller comprising a marine propeller comprising an inner bushing adapted to be mounted on a propeller shaft for common rotation therewith and having an axis and an outer surface, a resilient bushing fixed to said outer surf... | 06/04/1996 |
| 5514011 | Propeller arrangement for a marine propulsion unit A propeller has a hub affixed to a propeller shaft so as to rotate therewith. The hub is axially locked by a locking arrangement consisting of a lock nut screwed on to the shaft and a lock screw screwed into the end of the shaft to lock the nut. The screw... | 05/07/1996 |
| 5509785 | Impeller of motorboat A motorboat impeller comprises an axial portion having a through axial hole and having a plurality of blades mounted around the periphery thereof and further having a plurality of retaining slots in the inner wall of the through axial hole. The retaining ... | 04/23/1996 |
| 5498183 | Sideways loadable marine spare propeller mount A marine spare propeller mounting device used for safely securing a marine spare propeller on board a recreational or work vessel powered by common sterndrive units or large outboard motors. This invention includes a plastic base plate (2) that accepts a ... | 03/12/1996 |
| 5451143 | Motorboat impeller A motorboat impeller comprises an axial portion, a plurality of blades attached to the periphery of the axial portion, an axial casing, and a nose. The axial portion of a conical construction has a front end with an outer diameter smaller than an outer di... | 09/19/1995 |
| 5417093 | Propeller lock A lock to prevent theft of a marine propeller assembly having a cylindrical shaped housing on which are exteriorly mounted a series of propeller blades, with the open end of the propeller housing being flared outwardly, the assembly further being mountabl... | 05/23/1995 |
| 5352093 | Weedless propeller A propeller for use on low power motors, such as two-horsepower or less electric trolling motors, is provided with three or more blades on a hub wherein the hub diameter to the blade length (i.e. the length of the blade from the hub to the outermost tip) ... | 10/04/1994 |
| 5266009 | Impeller structure for water jet propelled boat A water jet propelled boat is equipped with a water intake opening, a water jet outlet, and with a mixed flow type impeller, where the above mentioned water intake opening and the above mentioned water jet outlet are connected by a water passage with the ... | 11/30/1993 |
| 5252028 | Marine propeller assembly with shock absorbing hub and easily replaceable propeller housing A shock absorbing hub for a marine propeller assembly includes an inner spindle telescoped onto the splined drive shaft of the engine, an outer sleeve spaced radially outwardly of the spindle, and a molded-in-place core of elastomeric material filling the... | 10/12/1993 |
