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Jet drive system powered by a 4-cycle engine to propel shallow water boats

a technology of jet engines and watercraft, which is applied in watercraft, marine propulsion, vessel construction, etc., can solve the problems of limited production and use of jet boats, damage to outboard motors,

Inactive Publication Date: 2011-11-10
JARNOT GARY ALLEN +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0008]This invention embodies a john or duck boat fitted with a transom mounted jet propelled system that will allow it to navigate in the shallowest of waters (4-7 inches) allowing access to rivers, lakes, and even flooded streets during hurricane and flood disasters. This will give exceptional maneuverability for search, patrol and rescue operations, and will provide recreational opportunities for hunting and fishing enthusiasts. An objective of this invention is to provide these benefits at a significantly reduced cost from that of conventionally produced construction. This jet-propelled boat utilizes an air-cooled horizontal shall 4-cycle engine. Exhaust is not expelled into the water. No oil is required to be mixed with the fuel, making the boat more convenient to use. The 4-cycle engine is attached to the jet pump using a drive and driven clutch system and belt. The boat can be launched and docked by one person of average strength. The boat is controlled by simple one-hand operation. An advantage of a jet-propelled system is reduced maintenance due to less exposed moving parts.

Problems solved by technology

With large engines and costly construction, production and use of the jet boat is limited.
Outboard motors are subject to damage caused by obstructions such as rocks and logs below the waterline of the boat.

Method used

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  • Jet drive system powered by a 4-cycle engine to propel shallow water boats
  • Jet drive system powered by a 4-cycle engine to propel shallow water boats
  • Jet drive system powered by a 4-cycle engine to propel shallow water boats

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Embodiment Construction

[0012]As shown in FIG. 1, an aluminum john boat configured with a jet propulsion system (4) commonly found in jet-ski / watercraft applications. The rider steers the jet-propelled boat (12) using a simple steering lever (6) with a throttle grip (11).

[0013]The transom of all john boats is manufactured with roughly an 80 degree angle to accommodate outboard motors. To accomplish this invention, we begin by molding a 90 degree transom (7) which will allow the jet pump (4) to be mounted to the transom (7) and be positioned perpendicular to the bottom of the boat.

[0014]As illustrated in FIG. 3, on the keel portion of the john boat (8) a custom aluminum intake cylinder (3) will direct water from a hole cut in the keel on the stern portion of the boat (18). This intake cylinder will direct water through a hole cut into the transom of the boat (7) into the jet pump (4) to provide propulsion. FIG. 2 shows an aluminum housing (20) attached to the transom of the boat (7) that protects the jet pu...

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Abstract

One embodiment of a boat or watercraft that is fitted with a jet drive system powered by a 4-cycle engine and positioned in such a way that will enable the boat to be propelled and maneuvered in extremely shallow water and launched for use by a minimum of one person.

Description

CROSS REFERENCE [0001]NoneFEDERALLY SPONSORED [0002]Not applicableSEQUENCE LISTING [0003]Not applicableBACKGROUND OF THE INVENTION [0004]1. Field of the Invention[0005]This invention generally relates to jet-propelled watercraft, specifically utilizing a 4-stroke engine and a simplified drive system for shallow water use.[0006]2. Prior Art[0007]The idea of jet propelled system for boats dates back to the late 1920's as seen in U.S. Pat. No. 1,716,400 by John Arthur Weis. In 1974, U.S. Pat. No. 3,797,447, inventor Robert Stubblefield perfected the inboard propulsion system. In recent years, a jet propulsion system has become popular and used primarily in jet skis and jet boats. A jet pump is comprised of a steel impeller, a drive shaft, a directional nozzle that connects to the steering cable tab on the discharge nozzle directing the flow of water through the nozzle which provides direction for the boat / apparatus to which the jet pump is attached. With large engines and costly constr...

Claims

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Application Information

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IPC IPC(8): B63H11/107
CPCB63H11/08
Inventor JARNOT, GARY ALLENKROLL, SHAWN EVERETT
Owner JARNOT GARY ALLEN
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