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| Number | Title | Issue Date |
| 7357687 | Marine propulsion steering system A marine propulsion steering apparatus includes a steering nozzle having a central opening therethrough which surrounds a marine propulsion drive shaft and propeller extending from a hull or propulsion module. The nozzle is pivotally mounted for angular movement in ... | 04/15/2008 |
| 7335074 | Shroud enclosed inverted surface piercing propeller outdrive A shrouded outdrive propels a high-speed boat having a hull for high-speed passage through water. The hull has at least one bow at the forward end and at least one transom at the stern. A tubular shaft extends at a small angle (6° to 12°) from the boat transom int... | 02/26/2008 |
| 7267589 | System and apparatus for improving safety and thrust from a hydro-drive device A system and apparatus are disclosed for improving safety and hydro-flow thrust from a hydro-drive device. The apparatus may include a shroud having a first opening for the ingress of water, and a second opening for the egress of water, and a vane extending inward f... | 09/11/2007 |
| 7229331 | Shroud for a hydro thrust device An apparatus is disclosed for improving safety and hydro-flow thrust from a trolling motor. The apparatus may include a first and second semi-circular portions configured to connect together to substantially enclose a hydro-drive device, and a semi-circular bracket ... | 06/12/2007 |
| 7066775 | Propeller wash straightening device A prop wash straightening apparatus for increasing the efficiency of propeller-driven watercraft. An elongated outer tubular member open at each end thereof is adapted for connection to the boat or vessel to position said outer member immediately downstream of the p... | 06/27/2006 |
| 6976444 | Marine vessel propulsion and tubular rudder system A water craft propulsion and steering system is disclosed in which a pair of tubular steering rudders are mounted one on the front end and aft end, respectively, of a propeller shroud tube. Power means is provided for turning both steering rudders in the same direct... | 12/20/2005 |
| 5795199 | Propeller drive for watercraft A propeller drive for watercraft, preferably for ferry boats and car ferries, which has two propellers located one behind the other in the center-line plane. The forward propeller is preferably located on a marine shaft which exits the hull, and can be dr... | 08/18/1998 |
| 5697315 | S-type marine rudder A marine rudder comprises a generally S-shaped rudder plate having a pair of semi-circular concave portions. The rudder plate is connected to the stern of a ship such that the semi-circular concave portions of the rudder plate are disposed on opposite sid... | 12/16/1997 |
| 4895093 | Manoeuvring device for boats The invention is a manoeuvring device for boats, comprised of a pair of pivotal tube plates (17, 18) mounted outside a propeller 14 and, under normal operation, forming a tube (19) around the propeller. These plates can be swung to one side relative to a ... | 01/23/1990 |
| 4808132 | Marine drive apparatus A marine drive apparatus including a shroud channel selectively rotatable to direct the water produced by a rotatable propeller so as to provide reversing and steering of a marine craft. The shroud channel has spaced side walls joined by a roof portion, t... | 02/28/1989 |
| 4773347 | Boat steering device A steering device, particularly attractive for use with power driven boats, is in the general shape of a cylinder positioned aft, or rearwardly, of the propeller employed, and is arranged to direct the flow of the propelled water in the direction in which... | 09/27/1988 |
| 4694645 | Propeller assembly A propeller assembly, a so-called rotatable thruster, for propelling, manoeuvering, steering and/or positioning a watercraft, floating docks, pontoons and in particular offshore platforms, includes a propeller (1) having an embracing propeller shroud (2) ... | 09/22/1987 |
| 4493660 | Ship having at least one propeller nozzle unit with rudder in optimum position A marine vessel propulsion assembly includes at least one propeller nozzle unit having a rudder associated with it. The propeller nozzle unit has a shroud laterally surrounding the propeller and the shroud is supported so that it can be pivoted about two ... | 01/15/1985 |
| 4310319 | Steerable propeller A propeller that can be steered to the left or the right of the center line of a boat's keel in order to increase the steerability of a boat or craft driven by a conventional straight line drive inboard mounted engine.... | 01/12/1982 |
| 4048751 | Remotely steered toy boat A drive for a remotely steerable toy boat includes a reversible motor, a propeller shaft and a propeller. A stationary deflector shield is disposed laterally of the propeller. When the propeller is driven in reverse, part of the stream of water delivered ... | 09/20/1977 |
| 4046097 | Collar for redirecting propeller energy A rigid cylindrical collar with an inside diameter slightly larger than the outside diameter of a propeller which is mounted over a propeller and is used singly or in combination with a flexible extension thereto for maximizing the efficiency of propeller... | 09/06/1977 |
| 3961591 | Deflector rudders A propeller nozzle or duct in which the walls thereof terminate in two or more planes inclined symmetrically about an axis normal to the nozzle or duct centerline with one or more deflecter rudders pivotedly mounted across the opening so formed such that ... | 06/08/1976 |
| 3934538 | Boat propulsion system A boat propulsion system having a downwardly-facing, openbottomed recess at the front of a circumferentially-enclosed propellor which accelerates the inlet water flow to the propellor without, however, requiring the water to change direction abruptly. A v... | 01/27/1976 |
