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4306867 |
Apparatus for increasing the rearward propulsion of boat motors provided with reverse gears
The invention relates to an accessory for outboard motors, Z-drives for boats or the like, the exhaust gas of which is normally conducted through the propeller hub into the water. By means of a...
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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...
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4303401 |
Suspension means for outboard engines
Rubber bushings used in suspending an outboard engine are protected against thermal degradation by cooling them. Preferably the engine exhaust pipe is cooled near a supporting casing further to...
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4295835 |
High speed outboard drive unit
An engine driven outboard drive unit for propelling a watercraft has a vertical drive shaft driving a horizontal propeller shaft on which a propeller is mounted. The drive unit has a gearcase...
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4281996 |
Propeller with a water-jet for crafts
The invention provides a propeller with a water-jet for crafts consisting of an outboard motor capable of being swivelled at any angle and carrying structure for fixing it at the rear of a craft, a...
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4276036 |
Exhaust means for marine propulsion unit
Marine propulsion unit having a propeller assembly formed with exhaust gas passages through the propeller hub. An outer pipe is provided to encircle the propeller hub with a radial spacing and has...
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4274357 |
Power operated surfboard
A power operated surfboard which has a raised rear hollow portion at the rear in which is disposed an impeller housing having an impeller therein and a water discharge passage extending rearwardly...
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4254821 |
Heat pipe deicing apparatus
A heat pipe deicing system is disclosed for preventing accumulation of ice on portions of structures such as the deck, handrails, and ladders of a fishing vessel operating in very cold oceans. The...
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4239013 |
Propelling means
This invention is directed mainly to a propelling apparatus and a control for said propelling apparatus for use with a boat. This invention can be used with a small boat for pleasure and also for...
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4213414 |
Engine exhaust means for motor propelled boats
Engine noise attenuator for motor-propelled boats including a housing made of resilient material and having one end connected to the exhaust pipe and a perforated pipe disposed within the housing...
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4212259 |
Marine vessel noise attenuating structure
The exhaust or the inlet duct of a marine gas turbine engine power plant installation comprises a porous duct, a plurality of circumferentially arranged non-porous channel members attached to and...
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4194460 |
Vibration absorbed engine exhaust means for motor propelled boats
A motor-propelled boat comprising a boat hull, an internal combustion engine mounted on the boat hull through a resilient mounting and adpated to drive a propulsion unit, the engine including a...
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4178873 |
Exhaust coupling assembly for a marine stern drive
A marine stern drive includes an inboard engine having an exhaust passageway connected to an outboard drive unit having an exhaust passageway. A transom bracket assembly positioned between the...
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4167857 |
Marine diesel engine and ship equipped with the same
A marine Diesel engine consists of parallel left and right engines mounted on a common bed plate having integral independent columns on which the cylinders of the engine are supported, the bed...
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4145988 |
Exhaust system for outboard marine propulsion unit
Exhaust system for outboard marine propulsion unit including a hollow chamber formed in the housing of the unit and an engine exhaust pipe opening to the chamber. The exhaust pipe has a radially...
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4070983 |
Reversible outboard motor with exhaust gas discharge control
A reversible outboard motor is provided with structure for distribution of the exhaust gas from the motor away from the propeller and which may be integral or an attachment for existing outboard...
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4068612 |
Turbocharger housing construction for marine turbocharger and device for turbocharging a marine engine
An improved turbocharger for marine engines includes a water jacket which insulates or shields the heated turbocharger from the engine compartment. Preheated water is directed from a water jacket...
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4036162 |
Marine propulsion device having increased reverse thrust
Disclosed herein is a marine propulsion device which comprises an engine having an exhaust port for discharging exhaust gas, and which also comprises a lower unit having an exhaust tube in...
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4023353 |
Multi-flow marine jet-propulsion apparatus
An outboard marine propulsion apparatus has a rotor unit axially displaceable between forward and reverse operating positions. In the forward position, concentric horizontal paths through the...
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4019456 |
Marine wet exhaust system and improvements in powered marine vessel
An exhaust gas-cooling water separation chamber, a gas collection chamber and gas acceleration and gas flow-shaping conduit means. The entrance of the separation chamber is connectable to water...
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4015429 |
Outboard motor for reducing exhaust gas pollutants
In an outboard motor having an engine located above the water level, a lower unit is provided extending downwardly from the engine and includes an exhaust gas tube within the lower unit with its...
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4014282 |
Exhaust tube mounting apparatus for outboard motors
In an outboard motor, the engine exhausts through the drive shaft housing in which an exhaust tube directs the gases into a lower propeller unit secured to the housing. The exhaust tube has support...
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4003331 |
Exhaust valve assembly for preventing ingress of water to an outboard marine engine
A marine outboard motor is provided with an exhaust valve assembly to operate automatically and prevent ingress of water in the event of a capsize. The exhaust gases pass downward through a...
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4002136 |
Marine exhaust system
A marine exhaust system for boats powered by an internal combustion engine is disclosed. An exhaust chamber is located in the stern of the boat and is connected to the engine exhaust manifold. A...
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3968767 |
Marine propulsion device adapted for a sailboat
Disclosed herein is a marine propulsion device comprising an engine including a bottom face with an exhaust gas passage port, together with a lower unit connected to the bottom face and including a...
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3967446 |
Exhaust relief silencing apparatus for marine propulsion systems
A tuned exhaust gas relief system for marine propulsion systems, for example an outboard motor, includes a lower drive shaft housing coupled to a two stroke engine by a pair of intermediate stacked...
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3961595 |
Steering apparatus for small outboard motors
An outboard motor has a steering tiller handle assembly attached to the driveshaft housing and pivotally mounted within a swivel mounting bracket assembly. The swivel bracket assembly includes a...
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3952686 |
Shaft protecting and propeller mounting sheath
This invention relates to a marine propulsion device having a propeller and a shaft for this propeller, which shaft is made from a unitary body of surface hard steel material and has its inner or...
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3946697 |
Engine exhaust gas discharge arrangement
Disclosed herein is an engine block including first wall portions defining a combustion chamber, second wall portions defining a bore including a first portion extending from the combustion chamber...
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3947151 |
Hollow hub marine propeller with anticavitation groove
This invention relates to hollow hub marine propellers provided with an external groove girdling the hub disposed between the propeller blades and the rear hub opening. The walls of the groove or...
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3943876 |
Water jet boat drive
A water-jet is mounted rigidly entirely outboard of the boat and driven from an inboard engine by an interconnecting chaft through the transom. The tail nozzle is mounted concentric of and spaced...
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3921398 |
Exhaust manifold with high rise water tube
Disclosed herein is an exhaust gas manifold comprising an exhaust gas passageway including an exhaust gas inlet portion, an elbow portion extending downwardly from the inlet, a discharge portion...
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3919965 |
Boat propeller mounting and steering mechanism
A boat propeller mounting and steering mechanism including an upper housing adapted to be mounted inside the hull of a boat and serving as a mounting and support means for a relatively rotatable...
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3911852 |
Water jacketed exhaust relief system
Disclosed herein is a marine propulsion device comprising a propulsion unit including a lower unit rotatably supporting a propeller and intended to be at least partially submerged in water,...
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3911853 |
Low profile outboard with in-line engine
An outboard motor comprising a propulsion unit adapted to be attached to the transom of a boat for vertical swinging movement relative to the transom about a horizontal tilt axis and for steering...
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3908578 |
Exhaust systems for aquatic craft
A self-propelled aquatic craft adapted for towing an individual through water comprised of an internal combustion engine drive connected to a propeller with a generally cylindrical guard member...
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3889623 |
Jet propulsion unit for boats
This jet unit includes a vertically oriented centrifugal pump having a drive motor mounted above it. The pump housing is disposed between the ends of a longitudinal passage having a forward intake...
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3888203 |
Stern drive for boats
Two hydraulic cylinders, one on each side of the stern drive and disposed between the tilt housing and the dirigible unit, steer the latter on the axis of the vertical drive shaft. The tilt housing...
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3871324 |
OUTBOARD PROPULSION UNIT EXHAUST DISCHARGE SYSTEM
It is disclosed for an engine driven outboard propulsion unit having a reversible propeller to selectively drive the propulsion unit in forward and reverse directions and passage means for...
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3859951 |
MARINE DRIVE TRANSOM SEAL APPARATUS
A jet propulsion unit for a boat includes a generally rectangular pump housing section extended through a transom opening. A seal unit includes an O-ring seal compressed between a pair of brackets...
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3849982 |
MARINE JET PROPULSION APPARATUS
A tubular casing having separable front and rear sections is secured at its front end to the transmission housing of a conventional outboard motor assembly. In lieu of the usual propeller element,...
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3834341 |
FLUID-COOLED ENGINE EXHAUST SYSTEM
In a water-cooled engine exhaust system for boats having inboard engines wherein exhaust gases from the engine are vented through a shaped conduit, couplings are provided to enable the conduit to...
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3831546 |
PORTABLE SWIMMER PROPULSION UNIT
A portable swimmer propulsion unit including a vane type gas motor driving shrouded screw. A positive expulsion, boot strap, hydrazine feed system supplies hydrazine to a hydrazine decomposition...
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3817202 |
ANTI-VENTILATION FENCE FOR A TRIM TAB
Disclosed herein is a stern drive unit including a trim tab extending from a drive shaft housing behind a propeller and downwardly into an imaginary cylinder projecting rearwardly in concentric...
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3812813 |
SHOULDER PACK POWER UNIT FOR PROPELLING WATER SKIS OR SURF BOARDS
A shoulder pack containing a light weight engine for propelling water skis or a surf board on which the operator stands, propulsion units being mounted under the skis or surf board and novel means...
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3799103 |
STERN DRIVE UNIT TRIM TAB
Disclosed herein is a stern drive lower unit comprising a lower portion which is at least partially submerged during normal operation and which includes a rotatably mounted propeller shaft carrying...
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3788267 |
ANTI-CAVITATION MEANS FOR MARINE PROPULSION DEVICE
Cavitation eminating from the leading edge near the hub of a propeller of a marine propulsion device is prevented by introducing exhaust gas air adjacent the junction of the leading edge of each...
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3782321 |
MOUNTING ARRANGEMENT FOR AN OUTBOARD MOTOR
The upper resilient mounts for connecting the power unit of an outboard motor to the swivel bracket are supported within cavities formed by cooperating semi-circular recesses in the driveshaft...
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3776164 |
APPARATUS FOR FILLING AND, IF DESIRED, EMPTYING INERT GAS POOR IN OXYGEN INTO OR FROM HOLDS IN SHIPS, RESPECTIVELY
Exhaust gases from an emergency or auxilliary gas turbine/generator set are passed to an afterburner in which the rather high oxygen content of said exhaust gases is reduced to an acceptable level...
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3772887 |
EXHAUST SYSTEM FOR THREE CYLINDER ENGINE
Disclosed herein is an exhaust gas passage system for an outboard motor having an internal combustion engine with three vertically aligned cylinders extending with their axes in the fore and aft...
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