A human propelled watercraft having a pair of flexible fins extending into the water each adapted to oscillate through an arcuate path in a generally transverse direction with respect to the central longitudinal dimension of said watercraft. Pedals are provided for applying input force whereby as input force is applied, the flexible fins can twist to form an angle of attack for providing forward thrust with respect to the longitudinal dimension of the watercraft while moving in both directions along the arcuate path. The user can pull a lever and cause the fins to rotate 180° and produce thrust in the reverse direction. The fins are able to pivot and swing aft to avoid damage if there is a collision with a submerged object. The fins are more efficient, durable, and adjustable. Simple plastic roller bearings have been adapted to reduce mechanical friction without the need for oil seals.


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    Title :

    Reversing propulsion device for watercraft



    Publication date :

    2018-05-29


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    B63H Schiffsantrieb oder Steuerung der Schiffe , MARINE PROPULSION OR STEERING



    REVERSING PROPULSION DEVICE FOR WATERCRAFT

    KETTERMAN GREGORY SCOTT / CZARNOWSKI JAMES TAYLOR / KARDAS JASON CHRISTOPHER et al. | European Patent Office | 2016

    Free access

    Reversing propulsion device for watercraft

    KETTERMAN GREGORY SCOTT / CZARNOWSKI JAMES TAYLOR / KARDAS JASON CHRISTOPHER et al. | European Patent Office | 2017

    Free access

    Reversing propulsion device for watercraft

    KETTERMAN GREGORY SCOTT / CZARNOWSKI JAMES TAYLOR / KARDAS JASON CHRISTOPHER et al. | European Patent Office | 2015

    Free access

    REVERSING PROPULSION DEVICE FOR WATERCRAFT

    KETTERMAN GREGORY SCOTT / CZARNOWSKI JAMES TAYLOR / KARDAS JASON CHRISTOPHER et al. | European Patent Office | 2017

    Free access

    Reversing propulsion device for watercraft

    KETTERMAN GREGORY SCOTT / CZARNOWSKI JAMES TAYLOR / KARDAS JASON CHRISTOPHER et al. | European Patent Office | 2016

    Free access