Matches 1 - 50 out of 104 1 2 3 >
Match Document Document Title
7544109 Propelling system for boat  
A propeller system for a boat includes a housing adapted to be mounted to a stern of the boat and having a receiving chamber inside and waterway at the bottom side thereof, a propeller rotatably...
7533625 Unmanned underwater vessel  
With an unmanned underwater vessel having a pressure hull, drive assembly and at least one ancillary device arranged on the pressure hull, for example a propeller protection apparatus ( 15 ), the...
7488226 Propeller shield apparatus for trolling motor  
A propeller shield apparatus for mounting to a trolling motor having an exposed propeller with a horizontal axis includes a vertical fin and an arcuate propeller shield. The arcuate propeller...
7335071 Electronic shut off systems  
Rapid shaft stop devices and transmissions are described that utilize permanent magnets for coupling and/or braking and are useful for electronic propeller guards and other equipment. In an...
7291047 Protective casing for water craft propellers  
A shielding apparatus includes a body formed from rigid material that has first and second pivotally conjoined sections removably cradled about the propeller. The body has a fulcrum axis registered...
7270584 Inboard/outboard motor protector with underwater hydrofoil  
Disclosed is a device that protects inboard/outboard motors (up to 250 horsepower) from damage and simultaneously provides an underwater hydrofoil that both helps prevent inboard/outboard motor...
7244153 Propeller cover  
An inexpensive easy to use and reusable propeller blade cover. The blade cover of the invention may be used on many kinds and sizes of propeller blades, but are particularly suited for use on boat...
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...
7218070 System and method for braking a motor of a propulsion unit  
The present invention relates to a propeller drive arrangement for vessels used in water-borne traffic, and specifically to a propeller drive arrangement containing a propulsion unit, and to such...
7172477 Safety propeller  
A safety propeller for a boat motor includes an annular collar having a front opening, a rear opening and a continuous peripheral wall. A plurality of angled, horizontal slits are circumferentially...
7156711 Outboard motor enclosure and security arrangement therefor  
A multi-purpose mariner safety and motor housing arrangement for the secure enclosure of the lower drive unit of an inboard/outboard or outboard motor for a boat. The multi-purpose housing...
7011559 Obstacle guard for a boat motor  
The invention is a lower housing unit and propeller protection assembly for a boat motor. The assembly comprises a planar clamp member, securable to a boat motor upper housing unit. An adjustable...
6935908 Weed deflector for an outboard motor water intake  
A weed deflector for a water intake formed in the lower unit of an outboard motor or stern drive of an inboard outboard engine. The weed deflector includes a fin with a leading edge disposed...
6916217 Boat propeller shield system  
A boat propeller shield system for protecting a propeller from damage and humans from injury. The boat propeller shield system includes a cover, a front opening within the cover and a zipper...
6817911 Hydro-Max motorboat propeller anti-slippage shroud  
A propulsion system component or accessory specifically used for boats which utilize either an inboard-outboard motor, or an outboard motor. A cylindrical shroud very closely surrounds the...
6790108 Boat propulsion system  
A boat propulsion system for propelling a boat through water with debris in the water and shallows. The boat propulsion system includes a motor assembly being designed for being positioned in a...
6783411 Propeller protector slipper  
Propeller protector slipper to be used on inboard and outboard motors of boats that are anchored, drifting, aground, docked, in storage, or out of water in transit. The propeller protector slipper...
6736686 Motorboat propeller safety enclosure  
A boat propeller safety enclosure for the covering of the propeller of a boat during road transportation, which enhances the ability of those following the trailered boat to avoid contact with the...
6676460 Electronic propeller guard  
Electronic methods, devices and kits electronically protect swimmers, animals and other objects in water from propeller strikes, and alleviate propeller damage. Desirable embodiments include...
6645020 Submarine countermeasure propeller protector  
A propeller protector for a countermeasure vehicle having a propeller shaft, a propeller fixed to the shaft, radial fins fixed on the vehicle and extending outwardly from the shaft, and a shield...
6544082 Manatee protection installation on a boat  
The invention is directed to a protective rod system which is installed on the bottom of a boat by a hinge assembly which installation is about midway between the length of the boat. The protective...
6503110 Lower unit guard for an outboard motor  
A lower unit guard for an outboard motor includes a mounting adapted to be secured onto a flange on a housing of a boat motor. The mounting has a leading edge. A skeg receiving pocket is provided...
6475045 Thrust enhancing propeller guard assembly  
A propeller guard assembly for water craft that, in cooperation with a rotating propeller, creates a substantial increase in propulsive thrust and provides improved all around shielding of the...
6416371 Propeller deflector  
A propeller deflector system which includes rigid inclined vanes permanently mounted on the bottom of a hull of a water craft and aligned parallel with the longitudinal axis of the water craft. The...
6179673 Outboard motor protection apparatus  
An outboard motor protection apparatus is interposable between an outboard motor and a transom of a boat. The mounting of the motor on the transom of the boat is such as to allow for pivotal...
6168483 Defecting propeller guard  
A deflecting propeller guard comprising a pair of adjacent deflector plates slanting downwardly and rearwardly from a front apex location to provide downwardly and laterally facing deflection...
6155894 Off-center marine outboard skeg  
An outboard or stern marine drive assembly includes a skeg that is detachably secured to the lower gear case. The skeg plane is laterally off-set from the vertical plane that passes through the...
6155893 Lift-generating device for a power boat  
A lift-generating device for a power boat includes a boundary (4) of semi-circular form in cross section mounted beneath the propeller (5) of the boat so that the propeller (5) produces a...
5996729 Sound deflector  
A sound deflector comprising of a curved deflecting surface, with the deflector being connected to the back of a boat. The sound deflector deflects the sounds emitting from the outboard of a boat...
5993274 Weed guard system  
A weed guard system for trolling motors comprises a bracket structure attached to the boat and capable of allowing the motor to articulate arcuately as well as vertically. A generally straight skeg...
5975969 Hydrofoil propeller guard  
A hydrofoil propeller guard, including a thrust tube, a hydrofoil fin and bottom securing plate, is used in conjunction with an outboard motor mounted on a boat and with stern drives, to encompass...
5904603 Lockable propeller guard apparatus  
A lockable propeller guard apparatus 10 including a shroud member 20 having a distal end 22 dimensioned to encircle the propeller 102, a collar member 30 engageable in the distal end 22 of the...
5890937 Propeller shroud  
A propeller shroud affixable around the propeller of a water craft. The shroud has a generally cylindrical member which closely surrounds the outer periphery of the blades of the propeller. The...
5884509 Propeller lock  
An apparatus for locking a propeller is provided for reducing the risk of theft of a propeller from a motor. The apparatus comprises a cover plate to cover an end of the propeller shaft. A U-shaped...
5673643 Hydrofoil accessory for marine propulsion device  
A hydrofoil wing structure is disclosed to be employed as an accessory for a marine propulsion device, to be disposed above and mostly aft of the propelling means of such a device, to contour and...
5664977 Boat propeller sled  
A boat propeller sled comprising a spine, straps attached to the spine, and rails attached to the spine. The straps are sized to fit around an outboard motor lower unit, and to securely attach the...
5567189 Sailboat rudder-motor prop guard  
A guard, particularly adapted to protect a blade of a sailboat rudder from a propeller of an outboard motor mounted on a stern of the boat, includes a mounting plate. The mounting plate has an...
5501622 Marine mammal guard  
A marine mammal guard for an outboard motor having a drive shaft housing, an anti-cavitation plate, a lower support unit, a gear casing, a skeg and a propeller hub with a plurality of propeller...
5494465 Propeller protector  
A propeller protector comprises a shield 18 which surrounds the aft face of the propeller and prevents access thereto. The shield 11 may be secured in position by guide surfaces which engage the...
5399113 Protector against submerged objects  
The lower portion of the outdrive of a stern drive motor or of an outboard motor for boats, is further protected from damage on striking submerged objects. Protection at low speed is gained by...
5389021 Motorboat propeller safety shroud  
A protective enclosure and propulsive system for a motor-driven multi-bladed marine propeller includes a shroud housing which is positioned about the propeller that rotates on its axial through...
5344346 Driveshaft housing attachment  
Apparatus for improving the efficiency of a propulsion unit having a driveshaft housing depending from the stern of a boat, while protecting swimmers and the propulsion unit. A plate member has an...
5277632 Boat motor replacement skeg  
An outboard motor replacement skeg which is thin and flat and has a cavity formed in one of its edges is disclosed. The replacement skeg is slid over the stub which remains after the original skeg...
5224889 Propeller guard  
A device to protect the propellor of a boat from damage caused by striking underwater obstacles, when the boat is moving in any direction relative to the obstacles, and to improve the movement of...
5207605 Outboard propeller guard  
Two angle brackets secure a severely swept plastic wing-like propeller guard to the sides of the motor housing or skeg. The left and right wing-like projections have a horizontal center wing...
5178565 Lower unit guard  
A guard attachable to the lower unit of an outboard motor preventing direct impact between submerged hazards and the elements of the lower unit. The guard includes two angle brackets, a rigid bar...
5052957 Support for line and weed cutter  
Apparatus shears foreign matter such as lines, wires, nets and weeds that can entangle and befoul propellers, propeller shafts, bearings and related structures of propeller-driven, water born...
5044884 Safety propeller  
An inherently safer propeller design is disclosed. A conventional propeller has a substantially cylindrical ring affixed to the distal ends of the blades. Preferably, the leading edge of the ring...
5017165 Apparatus for automatically raising and lowering boat motors  
An apparatus for automatically raising and lowering boat motors includes a mounting configuration that allows the motor to move up out of the water and down into the water. A hydrofoil is connected...
5007869 Prop-saver (propeller guard device)  
Disclosed herein is a propeller guard device, including a laterally extending fin and a vertical extension, or sleeve. The fin and sleeve could be manufactured as a singular item. The vertical...
Matches 1 - 50 out of 104 1 2 3 >