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| Number | Title | Issue Date |
| 7566251 | Jet pumping device A propulsion or pumping device which includes two counter-rotating shafts (3, 4) each carrying at least one impeller (7, 8), wherein each impeller (7, 8) can deflect by a predetermined amount in directions substantially perpendicular t to the lo... | 07/28/2009 |
| 7438787 | Impressed current cathodic protection system for marine engine A cathodic protection system has electrodes disposed in a coolant passage of an engine filled with a conductive coolant. The electrodes are electrically insulated from the engine. A power supply device provides for a protective electric current to form from the elec... | 10/21/2008 |
| 7431809 | Electrode for a cathodic protection device An electrode for a cathodic protection device that has one or more electrode bodies formed of a conductive wire. The electrode includes a pair of films made of an insulating material which are bonded to each other while sandwiching the electrode body therebetween. P... | 10/07/2008 |
| 7354046 | Sealing apparatus having sequentially engageable seals Advantageous seal systems are provided that include a barrier member movable relative to a shaft to allow sequential engagement of resilient seal members, e.g., lip seals, with the shaft. Movement of the barrier member may be effected manually or through introductio... | 04/08/2008 |
| 7305928 | Method for positioning a marine vessel A vessel positioning system maneuvers a marine vessel in such a way that the vessel maintains its global position and heading in accordance with a desired position and heading selected by the operator of the marine vessel. When used in conjunction with a joystick, t... | 12/11/2007 |
| 7267588 | Selectively lockable marine propulsion devices A steering system for a marine vessel is provided with a connecting link attached to first and second marine propulsion devices. The connecting link is selectively disposable in first and second states of operation which either require synchronous rotation of the fi... | 09/11/2007 |
| 7267068 | Method for maneuvering a marine vessel in response to a manually operable control device A marine vessel is maneuvered by independently rotating first and second marine propulsion devices about their respective steering axes in response to commands received from a manually operable control device, such as a joystick. The marine propulsion devices are al... | 09/11/2007 |
| 7226327 | Outboard drive for boats An outboard drive for boats, having a steerable underwater housing (1) which has a wing-profiled portion (2). Projecting at an approximately 90 degree angle from the aft part of one side face (31) of the wing profile is a face portion (32... | 06/05/2007 |
| 7188543 | Gear and bearing mechanism for improved ease of assembly within a gearcase A retaining member is provided and attached to a bevel gear in order to allow the bevel gear to be attached, prior to assembly, to a bearing adapter. The retaining member is provided with first and second protuberances that extend radially outwardly from diametrical... | 03/13/2007 |
| 7186157 | Turning propeller drive for a boat A rotatable propeller drive (1) for a boat, where the propeller drive (1) includes an upper fixing plate (4) adapted for rotationally fixed attachment to the hull bottom (2) of the boat. A lower underwater housing (6) is provided o... | 03/06/2007 |
| 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 |
| 7131385 | Method for braking a vessel with two marine propulsion devices A method for controlling the movement of a marine vessel comprises steps that rotate two marine propulsion devices about their respective axes in order to increase the hydrodynamic resistance of the marine propulsion devices as they move through the water with the m... | 11/07/2006 |
| 7096810 | Bow mounted vessel propulsion system A bow mounted vessel propulsion system is designed to exploit the characteristics of a self-producing vessel lubricating boundary layer of air or air bubbles formed during water surface interaction by the vessel's hull during vessel movement. This boundary layer of ... | 08/29/2006 |
| 7070468 | Multi-hull watercraft with amidships-mounted propellers An efficient double-ended watercraft is disclosed that comprises four low-Froude number hulls: two forward, two aft, two on the port side, and two on the starboard. Each hull comprises an independent engine that drives a propeller shaft and propeller that is located... | 07/04/2006 |
| 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 |
| 7052340 | Method and apparatus for air cooled outboad motor for small marine craft An air cooled, belt drive and engine assembly mountable to the transom of small flat bottom boats in much the same manner as water cooled outboard engines with a lower foot that does not extend below the bottom of the boat but extends a sufficient distance behind th... | 05/30/2006 |
| 7033234 | Method of steering a boat with double outboard drives and boat having double outboard drives A method of steering a planning V-bottomed boat with double individually steerable outboard drive units with underwater housings (6), which extend down from the bottom (1) of the boat. When running at planning speed straight ahead, the underwater housi... | 04/25/2006 |
| 7013828 | Buoyant tube ship A tube ship includes at least three closed gas containers fastened into close lateral proximity to define an interstitial space between the containers which functions as a ship hold for retaining cargo, crew or passengers. The gas containers preferably are all tubes... | 03/21/2006 |
| 6966804 | Propulsion unit of marine vessel A marine vessel includes a rudder support structure attached to its hull and a rudder device attached to the rudder support structure in a manner allowing pivotal movement of the rudder device relative to the rudder support structure. A first drive train includes a ... | 11/22/2005 |
| 6960107 | Marine transmission with a cone clutch used for direct transfer of torque A transmission for a marine propulsion system uses a cone clutch in such a way that, when in a forward gear position, torque is transmitted from an input shaft, or driving shaft, to an output shaft, or driven shaft, solely through the cone clutch. When in forward ge... | 11/01/2005 |
| 6626713 | Water intake and transmission system A water intake and transmission system for simultaneously driving dual jet units of a jet boat. According to a preferred embodiment, the water intake includes dual channels to allow the uptake of dedicated streams of water. Mounted to the intake is a hous... | 09/30/2003 |
| 6623320 | Drive means in a boat Boat propeller drive with an underwater housing which is connected in a fixed manner to a boat hull and has tractor propellers arranged on that side of the housing facing ahead. Arranged in that end portion of the underwater housing facing astern is an ex... | 09/23/2003 |
| 6244912 | Strut-mounted marine propulsion unit A marine propulsion unit supported from a vessel by a strut contains an electric motor within a housing and a forward propeller driven by the electric motor and having a diameter larger than that of the housing. Hydrodynamic vanes projecting from the surf... | 06/12/2001 |
| 6176750 | Marine propulsion unit with hydraulic pump An improved hydraulic system for a twin propeller marine propulsion unit. A vertical drive shaft is operably connected to the engine of the propulsion unit and carries a pinion that drives a pair of coaxial bevel gears. An inner propeller shaft and an out... | 01/23/2001 |
| 6068529 | Marine propulsion unit with dual water inlet structure An improved twin propeller marine propulsion unit. A vertical drive shaft is journaled in the lower gearcase and drives a pair of bevel gears. A pair of concentric propeller shafts are mounted in the lower torpedo section of the gearcase and each shaft ca... | 05/30/2000 |
| 6066012 | Propulsion system for a marine vessel A system for propelling a marine vessel having a hull. The propulsion system including a first propeller assembly positioned to extend from the hull and along starboard side of the vessel, the first propeller assembly including a propeller positioned outs... | 05/23/2000 |
| 6062926 | Hydraulic system for a dual propeller marine propulsion unit An improved hydraulic system for a twin propeller marine propulsion unit. A vertical drive shaft is operably connected to the engine of the propulsion unit and carries a pinion that drives a pair of coaxial bevel gears. An inner propeller shaft and an out... | 05/16/2000 |
| 5921826 | Angle gearing, especially for a marine outboard drive unit Angle gearing, especially a lower angle gearing between an intermediate shaft (2) and one or two propeller shafts (6, 7) in a marine outboard drive unit. A conical bevel gear (3) is pre-tensioned on the intermediate shaft against a cone (10) on the interm... | 07/13/1999 |
| 5902160 | Twin propeller marine propulsion unit An improved twin propeller marine propulsion unit. A vertical drive shaft is journaled in the lower gearcase and drives a pair of bevel gears. A pair of concentric propeller shafts are mounted in the lower torpedo section of the gearcase and each shaft ca... | 05/11/1999 |
| 5890938 | Marine counter-rotational propulsion system A marine propulsion system with counter-rotating propellers is provided with the capability of causing the propellers to rotate at different speeds. A first gear is attached to an inner propeller shaft and a second gear is attached to an outer propeller s... | 04/06/1999 |
| 5888108 | Propulsion system for marine drive A propulsion system includes an improved propeller design which increases the durability of the propeller for enhanced rotational vibration damping, while simplifying the structure of the propeller. A rubber coupling is placed within a space that is secur... | 03/30/1999 |
| 5839928 | Shifting mechanism for outboard drive A shifting mechanism for an outboard drive of a watercraft provides reduced coupling shock when the forward gears are engaged by a dual clutch assembly, as well as provides for consistent and quick engagement of the clutch assembly with the gear. The shif... | 11/24/1998 |
| 5807151 | Propeller for marine propulsion drive A blade design for a counter-rotating propeller system improves the performance of the outboard drive on which is it employed when the propellers are run partially exposed. The propeller system includes a pair of counter-rotating propellers that rotate in... | 09/15/1998 |
| 5791950 | Twin propeller marine propulsion unit An improved twin propeller marine propulsion unit. A vertical drive shaft is journaled in the lower gearcase and drives a pair of bevel gears. A pair of concentric propeller shafts are mounted in the lower torpedo section of the gearcase and each shaft ca... | 08/11/1998 |
| 5788546 | Shift assistor for marine transmission A transmission for a dual, counter-rotational propeller system incorporates a shift assistor to yieldably cushion transmission engagement. The shift assistor desirably operates between one clutch of a dual clutch assembly and a clutch actuator. The shift ... | 08/04/1998 |
| 5766048 | Exhaust system for outboard drive An exhaust system for an marine drive discharges exhaust gases between front and rear propellers of a counter-rotating propeller system. The discharge of exhaust gases between the propellers produces a cavitation effect about the rear propeller when accel... | 06/16/1998 |
| 5755605 | Propeller drive unit A propeller drive installation in a boat has two propeller drive units (8, 9) which extend out through individual openings (4, 5) in the bottom (1) of a V-bottomed boat, so that the legs are inclined relative to each other. The leg of one drive unit can b... | 05/26/1998 |
| 5697821 | Bearing carrier for outboard drive A bearing carrier and ring nut of a marine outboard drive both attach to a lower unit of the drive by rotating them in the same direction. The bearing carrier includes a threaded front end which screws into a threaded aperture within the lower unit. A rin... | 12/16/1997 |
| 5624290 | Seal arrangement for propeller shafts of ships A seal arrangement for controlling any large bearing clearance in the vicinity of a propeller shaft, such as for a propeller drive system for ships with two concentric propeller shafts rotating in opposite directions, has a housing ring for supporting the... | 04/29/1997 |
