Patent
Propulsion device for boats
TLDR
A propulsion device for boats where a boxlike housing is mounted on the transom of a boat is described in this paper, where the bottom of the box-like housing defines an inclined cavity having an inverted U-shaped cross section and a progressively increasing depth toward the rear end.Abstract:
A propulsion device for boats wherein a boxlike housing is mounted on the transom of a boat; the bottom of the boxlike housing defines an inclined cavity having an inverted U-shaped cross section and a progressively increasing depth toward the rear end; there is disposed a propeller in said inverted U-shaped section to increase propulsion efficiency; and a footboard is detachably fitted on the upper portion of the boxlike housing.read more
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Patent
Propulsive thrust ring system
TL;DR: In this paper, a low-aspect ratio propeller system is provided with a multiple ring structure formed with a plurality of circular or non-circular, annular, narrow equivalent air foil rings which are held by rails in a predetermined relationship with the propeller blades.
Patent
Water jet boat drive
TL;DR: In this paper, a water jet is mounted rigidly entirely outboard of the boat and driven from an inboard engine by an interconnecting chaft through the transom, and a butterfly trim vane is pivotally mounted on a transverse horizontal axis in the tail nozzle and is adapted to close the nozzle for blocking the jet and compelling a reverse flow of the water from the pump.
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TL;DR: In this paper, a surface piercing marine outdrive is attached to the propeller shaft mount of a ship by means of a shroud, which is used to destroy any side thrust exerted by a propeller on the water.
Patent
Propulsion arrangement for a marine vessel
TL;DR: In this paper, a propulsion arrangement for a marine vessel is described which comprises a propulsion unit having: (i) a non-rotating housing in the form of a nozzle (10) extending along a principal axis (50); (ii) a propeller (22, 40) mounted for rotation within said nozzle(10); (iii) a support shaft (23), extending along the principal axis of the nozzle, and to which shaft the propeller is affixed.
Patent
Cooling system for marine engines
TL;DR: In this article, a cooling system for marine engines for use in propelling a boat and where the propulsion system provides a flow of water to the engine for cooling and wherein the water is provided at a range of pressures including a high pressure, the cooling system including a pressure regulator for receiving the flow of the water from the propulsion systems and for providing this flow of cooling and with the pressure regulator providing the flow at a pressure substantially less than the high pressure from propulsion system, a thermostat located to receive water from an engine and for regulating the flow from the engine in accordance
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Patent
Motor boat and driving unit therefor
TL;DR: In this paper, the motor and the propeller are mounted as a unit for attachment to the boat and the rudder is also contained in them, which is called a detachable unit.
Patent
Marine propulsion unit
John D Gill,James R Wynne +1 more
TL;DR: An amphibious vehicle has an engine and a drive train connected to drive wheels with tires having a tread configuration that produces a water propulsion effect when the vehicle is driven through water as discussed by the authors.
Patent
Exhaust system for tunnel stern boat
TL;DR: In this paper, the exhaust from an inboard engine is piped to a transom opening from which it is guided downward and directed under the spray plate into the high speed stream of water thrust aft from the propeller.