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Multi-function auxiliary rudder system for jet propelled watercrafts

a rudder system and multi-functional technology, applied in the field of auxiliary systems, can solve the problems of inability to function articulating or bias means, and achieve the effects of reducing the force needed to turn the helm, preventing the rudder from bending, and reducing physical strength

Inactive Publication Date: 2012-11-15
WALKOWIAK JEFFREY T
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

"The present invention is an auxiliary rudder system for jet propelled watercraft that can be used in different modes to provide steering assistance to the operator. The system uses a dual purpose thrust operated actuator that can be set in an up mode, a lower mode, or a fixed mode for slow or idle speeds. The actuator can hold the rudders in the water at speed and uses the force of the jet pump to move the rudders in and out of the water. The system also includes a side force stabilizer to prevent bending of the rudders due to external forces and a power steering effect to reduce the physical strength required to turn the helm. The invention provides versatility and improved steering control for jet propelled watercraft."

Problems solved by technology

However, in normal operation, the articulating or bias means do not function due to the downward force of the jet pump.

Method used

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  • Multi-function auxiliary rudder system for jet propelled watercrafts
  • Multi-function auxiliary rudder system for jet propelled watercrafts
  • Multi-function auxiliary rudder system for jet propelled watercrafts

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Embodiment Construction

[0029]Referring now to the drawings, FIGS. 1-11 conceptually disclose the present invention, which is an auxiliary rudder system configured for use with a jet propelled watercraft having a directional nozzle drive system 12. The directional nozzle itself is depicted as 12a and its outlet is depicted as 12b. The rudder system is depicted generally as 10.

[0030]The auxiliary rudder system 10 comprises a pair of spaced-apart fins 14. The fins 14 are configured to be pivotally attached at one end to a proximal end of said nozzle drive system 12 so that said fins 14 pivot up or down along sides of said nozzle drive system 12. The fins 14 extend in length from said proximal end of said nozzle drive system 12 a predetermined distance beyond a jet water flow outlet 12b of the directional nozzle 12a of the drive assembly 12. The length beyond the outlet plane is sufficient to include the dual thrust actuator 16 between the fins 14 and to also subject the actuator surfaces 16a,16b to thrust fo...

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Abstract

A rudder system that uses a dual purpose thrust operated actuator. The actuator is selectively positioned for use in an up or constant down mode. While in the up mode, the actuator uses the force of the jet pump to raise the rudders out of the water at speed, and with the actuator set in the down mode, the invention uses the force of the jet pump water to hold the rudder in the water.

Description

FIELD OF THE INVENTION[0001]The invention relates to an auxiliary system for providing positive steering to marine crafts using jet propulsion systems, typically personal jet driven watercrafts such as jet boats and jet skis.BACKGROUND OF THE INVENTION[0002]By way of background, there are two types of jet propulsion systems currently in use. The first type most commonly used is found on personal watercrafts usually referred to as Jet Skis. This type uses a directional nozzle. The nozzle turns from side to side directing water from the jet to change the direction of the watercraft.[0003]The second type is commonly used on Jet Boats and incorporates a movable hood or cover over the directional nozzle to force the water from the jet below the boat to add reverse thrust and allows the boat to back up. For forward thrust, it is pulled up above the jet nozzle.[0004]In both types, the steering of the watercraft relies completely on the direction and force of the water being expelled from t...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): B63H25/38
CPCB63H25/382B63H11/107B63H2025/387B63H11/113B63H2025/385B63H11/11
Inventor WALKOWIAK, JEFFREY T.
Owner WALKOWIAK JEFFREY T