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Reverse system for water-jet propulsion personal watercraft

a technology for reverse systems and water-jet propulsion, applied in water-borne vessels, marine propulsion, vessel construction, etc., can solve the problems of high positioning precision, relatively complex structure, and expensive stopper devices, and achieve the effect of simple structure and high positioning precision

Inactive Publication Date: 2005-06-09
KAWASAKI HEAVY IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0010] The present invention addresses the above described condition, and an object of the present invention is to provide a reverse system capable of holding a reverse bucket with a relatively simple structure and with high positioning precision.
[0012] In this construction, the stopper of the reverse bucket and the restricting portion of the pump cover can restrict the upward pivot movement or the downward pivot movement of the reverse bucket within a predetermined range. Such a simple construction can improve positioning precision of the reverse bucket.
[0013] The pump cover may further include a mounting portion configured to pivotally mount the reverse bucket. By reducing the number of parts, a simple construction is achieved. Also, the restricting portion may be integral with the mounting portion. Because the mounting portion for the reverse bucket may serve as the restricting portion, a simpler construction is achieved.

Problems solved by technology

The stopper device is constructed by assembling numerous parts, and has a relatively intricate structure.
Such a stopper device is expensive because of the numerous parts, and may make it difficult to hold the reverse bucket at the upper or lower position with high positioning precision.

Method used

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  • Reverse system for water-jet propulsion personal watercraft
  • Reverse system for water-jet propulsion personal watercraft
  • Reverse system for water-jet propulsion personal watercraft

Examples

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Embodiment Construction

[0029] Hereinafter, a reverse system of a water-jet propulsion personal watercraft according to an embodiment of the present invention will be described with reference to drawings. The personal watercraft in FIG. 1 is a straddle-type personal watercraft equipped with a straddle-type seat 7 configured to be straddled by a rider. A body 1 of the watercraft is formed by a hull 2 and a deck 3 covering the hull 2 from above. A line at which the hull 2 and the deck 3 are connected over the entire perimeter thereof is called a gunnel line 4. The gunnel line 4 is located above a waterline 5 of the personal watercraft being at rest on the water. Herein, directions are described as seen from the perspective of the rider straddling the seat 7, and looking ahead over the bow of the watercraft. The term “longitudinal direction” is used to refer to an orientation extending from bow to stem of the watercraft, while the term “lateral direction” is used to refer to an orientation extending from star...

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PUM

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Abstract

A reverse system of a water-jet propulsion personal watercraft is disclosed. The reverse system typically includes a water jet pump configured to propel the watercraft, a reverse bucket disposed rearward of the water jet pump to be vertically pivotable and configured to receive water ejected rearward from the water jet pump and to direct the water substantially forward, and a pump cover configured to cover the water jet pump from below. The pump cover typically includes a restricting portion, and the reverse bucket typically includes a stopper. The restricting portion and the stopper typically are configured to contact each other to restrict upward pivot movement or downward pivot movement of the reverse bucket within a predetermined range.

Description

BACKGROUND OF THE INVENTION [0001] 1. Field of the Invention [0002] The present invention relates to a reverse system configured to move a water-jet propulsion personal watercraft rearward. [0003] 2. Description of the Related Art [0004] In recent years, water-jet propulsion personal watercraft have been widely used in leisure, sport, rescue activities, and the like. The personal watercraft is configured to accommodate an engine within a body formed by a hull and a deck covering the hull from above. The engine is configured to drive a water jet pump, which pressurizes and accelerates water sucked from a water intake generally provided on a hull bottom surface and ejects it rearward from an outlet port. Thereby, the personal watercraft is propelled. [0005] In water-jet propulsion personal watercraft, a steering nozzle is provided behind the water jet pump to be pivotable either to the right or to the left, and connected to a bar-type steering handle through a cable. By operating the ...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): B63H11/11
CPCB63H11/11
Inventor TSUMIYAMA, YOSHINORIKUROYANAGI, YOSHIYUKI
Owner KAWASAKI HEAVY IND LTD
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