Title: Water jet propelling apparatus for boats

Abstract: A water jet propelling apparatus for boats forces waters by a pump through a nozzle directed astern of the boat. A curved lowerable jet-deflecting surface downwardly and forwardly deflects the water and reverses the thrust; and a pair of steerable parallel rudder blades are pivotable in unison for laterally deviating the jet. The jet-deflecting surface has symmetrical channel-like side portions which directs water escaping laterally from the clearance between the trailing edges of the rudder blades and the jet-deflecting surface forwardly towards the bow to enhance the reverse thrust, and a central portion which is complementally shaped with the welder blades for maintaining the clearance with the latter constant for various pivotal deviations of the blades.

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Inventors: Castoldi, Luigi (20081 Abbiategrasso, IT)

Application Number: 472379
Filing Date: 1974-05-22
Publication_date: 1976-02-10
Assignee:
Primary Class(es): 440/41 440/43
Other Classes:
US Patent Ref:

3114239	Dec, 1963	Aylor	115/16.
3422789	Jan, 1969	Wynne et al.	60/222.
3465705	Sep, 1969	Castoldi	115/12.

Other Refs:
Primary Examiner: Blix, Trygve M.
Assistant Examiner: Sotelo, Jesus D.
Attorney: Striker; Michael J.