Variable venturi

Details Variable venturi Variable venturi

2005-02-22

2005-02-22

Sotelo, Jesus D. (Department: 3617)

Marine propulsion

Jet drive

C440S047000

Reexamination Certificate

active

06857920

ABSTRACT:
Variable venturi for use in jet propulsion systems of watercraft include discharge openings with selectively variable discharge areas that enable a venturi controller to selectively maximize top speed, acceleration, and/or fuel efficiency. The variable venturi may include a plurality of circumferentially-spaced, squeezable, flexible sections that selectively move radially inwardly to alter the discharge area. Alternatively, the variable venturi may include a flexible venturi with a variably-shaped flexible discharge opening. Alternatively, the variable venturi may include a main rear discharge opening and a plurality of additional discharge openings with selectively openable valves, whereby selective opening of the valves effectively increases the discharge area. Alternatively, the variable venturi may have a movable end flap that selectively varies the discharge area.

REFERENCES:
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patent: 5658176 (1997-08-01), Jordan
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www.wetwolf.com, Sep. 23, 2003, pp. 1-6.

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