Matches 1 - 50 out of 53 1 2 >
Match Document Document Title
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...
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...
7144223 Supercavitating propeller with adjustable cup, and the method to adjust said cup  
The invention describes a supercavitating propeller with adjustable cup, and a method to adjust the cup. The trailing edge of the propeller blade is characterised by a protuberance with a limited...
7134837 Cavitation alleviation and line cutting device  
A line cutting device for use with a hydrodynamic propeller has a blade ( 5 ) fixed to a vessel having the propeller. Three rotating blades ( 22 ) extend from a hub fixed around the propeller's...
7011504 Fan, fan guard and related method  
An assembly includes a fan housing that includes a casing and a stator disposed radially inward of the casing and adapted to receive a rotor assembly. Struts attach the stator to the casing. One or...
6519981 Anti-theft device for a lower unit of an outboard engine and stern drive  
An anti-theft device for a lower unit of an outboard engine including a collar extending around the outboard engine, pivoting apparatus operatively connected to the collar, and locking apparatus...
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...
6439852 Fan wire guard with circumferential wire support mechanism  
A protective guard for use with a fan or other mechanism includes main support members, perimeter support members, main screen members, and perimeter screen members with joints formed between the...
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...
6123448 Agitator for fixing and/or conveying aggressive liquids and/or liquids containing solids or fibers  
6102661 Propeller with annular connecting element interconnecting tips of blades  
A propeller (10) including a hub (11), a plurality of blades (13) extending outwardly from the hub (11) and part annular connecting elements (17) which interconnect tips (16) of adjacent blades...
6036444 Protective air passing shield  
A protective air passing shield has a top shield resiliently releasably connected by a plurality of mounts to an end portion of a side shield. The protective air passing shield is disposed about a...
5928042 Propeller guard  
A propeller guard for use in association with a boat propulsion propeller driven by an outboard motor or an inboard/outboard rear motor drive unit. The propeller guard may be constructed of...
5906522 Thrust enhancer for marine propeller  
A thrust enhancer includes a peripheral ring with an exhaust ring concentrically supported within the peripheral ring by a plurality of radially extending circumferentially spaced struts. Each...
5791955 Cover for boat propulsion units  
The cover is used for boat drive units, at least portions of which are disposed outside the hull of a boat. At least two housing shells are provided, which can be placed in a form-fitting manner on...
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...
5469721 Boat propeller case and lock  
A case and lock for reducing damage and deterring theft of boat propellers. The invention is comprised of a case for enclosing a boat propeller and a portion of a propeller drive unit. The case has...
5405243 Propeller with shrouding ring attached to blade  
A propeller having a central hub portion with multiple blades affixed to the hub portion and spaced around the circumference of the hub to extend outwardly therefrom is provided. An annular ring or...
5246345 Boat propeller cover  
A locking boat propeller cover that completely encloses the propeller whereby unauthorized removal of the propeller is prevented, the propeller is protected from damage, and the risk of injury to...
5203826 Enclosed flywheel  
A flywheel has a hub with a plurality of blades secured to said hub and extending away therefrom. A plurality of ribs are secured to the blades to form a protective enclosure which rotates with the...
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...
5176550 Engine propeller blade and lower unit protector  
The propeller and lower unit protector is made from a high grade steel and has a spring like U-shaped top member for sliding in a generally horizontal direction over an outboard engine cavitation...
5066254 Boat propeller guard  
The propellor guard described herein is designed primarily for the protection of manatee but is also useful in protection against injury to other animals and larger fish which might come in contact...
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...
5009620 Propeller guard  
A propeller guard is provided with replaceable ribs that form a cage is placed around the propeller of an outboard marine propulsion unit. The ribs are suspended from a flat upper plate adapted to...
5007867 Weed ring for trolling motor  
An improvement is provided in a trolling motor of the type having a propeller, a housing with axially spaced leading and trailing ends, a shaft carrying a propeller and journalled for rotation in...
4957459 Propeller shroud with load bearing structure  
In a marine drive (10), a propeller shroud is provided by a cage (24) having internal spoke structure (26, 28, 38, 40, 46, 48) and having retainer structure (50, 74) mounting the cage (24) to the...
4932839 Propulsion and steering apparatus  
a propulsion and steering apparatus generally for a boat having a unitized construction comprising an engine, propeller, rudder and protective cage for the propeller, all mounted on a rotatable...
4911664 Weed cutting and shredding attachment for trolling motor  
A weed cutting and shredding attachment for an electric trolling motor including a sharpened cutting blade oriented with the sharp edge thereof adjacent to the path of movement of the leading edge...
4902255 Weedguard for electric trolling motor  
A weedguard for attachment to electric trolling motors having a motor housing and a motor support shaft, the weedguard comprising a lower triangular frame member portion and an upper arm portion,...
4898552 Outdrive lower unit housing-to-propeller hub bridging sleeve  
A thin wall sleeve is provided including an inside diameter greater than the outside diameter of the rear terminal end of a marine outdrive lower unit propeller drive housing portion and the...
4891026 Marine propeller including fish line trap  
Disclosed herein is a marine propulsion device including a lower unit having a gear case normally submerged in water and a propeller rotatably mounted in and extending rearwardly of the gear case....
4776755 Shrouded propeller  
A shrouded propeller for operation in ice-filled waters, which arrangement comprises a propeller and a nozzle encirculating the propeller, which propeller arrangement comprises an ice crusher...
4726183 Self retracting screens for turbomachinery  
A self retracting screen for turbomachinery comprised of a number of interlocking wires, the wire ends being pivotally attached to the periphery of the normal inlet of the turbomachinery....
4722667 Rope and fish net guard  
The specification discloses a combined rope and fish net guard for use on large ocean going marine vessels. A rope guard extends outwardly from the stern frame to closely overlap the propeller hub....
4680017 Motorboat propeller guard for improved performance  
A propeller guard includes a rigid U-shaped sleeve which has a pair of legs extending on either side of the lower housing in the motor. The cavitation plates on the lower housing are received...
4648768 Locknut assembly for high-speed rotary components  
A lock assembly for securing nuts to rotatably driven shafts in which a generally U-shaped locking spring is mounted with one leg thereof disposed along an opening in the rotatably drive shaft or a...
4637801 Thrust enhancing propeller duct assembly for water craft  
A propeller duct assembly for use on water craft which enhances the thrust of the propeller, increases fuel efficiency, stabilizes boat handling, serves as a safety factor for swimmers, and which...
4634346 Fan guard assembly  
A fan guard assembly comprising a pair of mirror image plates, each of said plates having a plurality of perforations extending therethrough to define a plurality of air flow passages. The plates...
4604068 Marine propulsion device lower unit including propeller bearing member anode  
A lower unit for a marine propulsion device, which lower unit comprises a drive shaft housing having a lower end, a gear case housing connected to the lower end of the drive shaft housing, a...
4590386 Piggy back water power generator  
A water power apparatus, composed of independent design features, which provides for: (1) utilization of a central boat with two paddle wheels and respective side stabilizers, with one wheel being...
4565533 Boat propeller guard  
A guard for protection of an outboard motor is described. The guard comprises a main rib with a shock absorbing end portion and a resilient rib which is secured to the main rib such that, when the...
4549949 Marine propulsion device including cathodic protection  
The marine propulsion device lower unit includes a housing having a lower portion submerged in water and defining an internal passage communicating with the water. Corrosion protection for both...
4486181 Marine propulsion device including thrust bushing anode  
A marine propulsion device is provided including a lower unit having a gearcase and a propeller shaft housing located in the gearcase and supporting a propeller shaft for rotation. A propeller is...
4455962 Spherical underwater vehicle  
A spherical vehicle for operation in a fluid medium utilizes an actuator disk or propeller of approximately half the diameter of the sphere for propulsion. In addition to providing the energy for...
4450670 Weed cutter for boat motor  
A cutting tool for use in conjunction with the propeller assembly of a boat to prevent underwater foliage from fouling the drive mechanism of the boat. The shank end of the tool is secured to the...
4427393 Propulsion of ships  
Propulsion unit for a marine vessel intended for operation under severe ice conditions comprises a multi-bladed propeller, which may be of fixed or controllable pitch, a stationary duct, which may...
4304558 Marine propulsion device including propeller shroud  
The marine propulsion device includes a lower unit normally submerged in water, a propeller carried by the lower unit, and an annular shroud surrounding the propeller blades and defining a...
Matches 1 - 50 out of 53 1 2 >