Fluke drive system for a vessel (100), comprising a pivot element (114) having a forward end and an aft end, which pivot element (114) is pivotally connected at the forward end to a hull (101) of the vessel (100) and which pivot element (114) is connected at the aft end to a flexible fluke (125); a driving mechanism having a drive point (120), which driving mechanism is arranged to impart a reciprocal or rotary movement to the drive point (120); and a drive rod (121) having a first end and a second end, which drive rod (121) is connected at the first end to the drive point (120) and at the second end to the pivot element (114), which second end is connected to the pivot element (114) at a point (122) along the pivot element (114) between said forward and aft ends. The invention is characterized in that the driving mechanism comprises a carrier element (112) fastened to a propeller axle (111) of the vessel (100) and being arranged to rotate with the said propeller axle (111), and in that the said drive point (120) is excentrically arranged on the carrier element (112) so that a rotation of the propeller axle (111) will drive the drive rod (122) back and forth, in turn resulting in a reciprocal up and down motion of the flexible fluke (125). The invention also relates to a method.

Fluke drive system for a vessel (100), comprising a pivot element (114) having a forward end and an aft end, which pivot element (114) is pivotally connected at the forward end to a hull (101) of the vessel (100) and which pivot element (114) is connected at the aft end to a flexible fluke (125); a driving mechanism having a drive point (120), which driving mechanism is arranged to impart a reciprocal or rotary movement to the drive point (120); and a drive rod (121) having a first end and a second end, which drive rod (121) is connected at the first end to the drive point (120) and at the second end to the pivot element (114), which second end is connected to the pivot element (114) at a point (122) along the pivot element (114) between said forward and aft ends. The invention is characterized in that the driving mechanism comprises a carrier element (112) fastened to a propeller axle (111) of the vessel (100) and being arranged to rotate with the said propeller axle (111), and in that the said drive point (120) is excentrically arranged on the carrier element (112) so that a rotation of the propeller axle (111) will drive the drive rod (122) back and forth, in turn resulting in a reciprocal up and down motion of the flexible fluke (125). The invention also relates to a method.

A Pulsed Locomotor (120), for propelling media, fluids and crafts, in fluids and on land, comprising a blade (124) securely connected to a drive shaft (122). Upon reciprocation, the ambient medium is forced towards the trailing edge of the blade (124) thereby causing a reactive locomotion of the apparatus, substantially along the plane of the blade. Apparatus is secured to motor M by fastening through aperture (130). The apparatus can be operated directly by motor M, and indirectly by the reaction momentum imparted to a supporting platform P. Thrust is directed by steering handle (128) about a bearing (126), rotatably coupling to platform P and base C. Lubricant L is supplied to outlets (134) via conduit (136) and inlet (132), to coat the apparatus with a lubricant cavity, for drag reduction. The blade (124) planes along a figure 8 reciprocation path s1e1s2e2s1. Crafts are embodied.

Disclosed is a propulsion unit for propelling a vessel. The propulsion unit comprises a main body configured to be arranged at a keel of the vessel and comprising a pivot point, a fin being movably arranged in relation to the main body, and an actuator assembly for generating a heave motion of the fin in relation to the main body. The actuator assembly comprises at least one actuator. The fin is connected to the pivot point, such that the fin is arranged to pivot around the pivot point when the at least one actuator generates the heave motion of the fin, thereby generating a pitch motion of the fin.

The invention relates to a fluid outlet interface for a personal watercraft, so that the latter can collect and divert a very small portion of the fluid pressurized by said vehicle and thus create a sufficient Venturi effect to drive the emptying of the bilge of said vehicle. The invention also relates to a personal watercraft, or more generally any floating device delivering a pressurized fluid, comprising such an interface.

The invention relates to a fluid outlet interface for a personal watercraft, so that the latter can collect and divert a very small portion of the fluid pressurized by said vehicle and thus create a sufficient Venturi effect to drive the emptying of the bilge of said vehicle. The invention also relates to a personal watercraft, or more generally any floating device delivering a pressurized fluid, comprising such an interface.

Fluke drive system for a vessel (100), comprising a pivot element (114) having a forward end and an aft end, which pivot element (114) is pivotally connected at the forward end to a hull (101) of the vessel (100) and which pivot element (114) is connected at the aft end to a flexible fluke (125); a driving mechanism having a drive point (120), which driving mechanism is arranged to impart a reciprocal or rotary movement to the drive point (120); and a drive rod (121) having a first end and a second end, which drive rod (121) is connected at the first end to the drive point (120) and at the second end to the pivot element (114), which second end is connected to the pivot element (114) at a point (122) along the pivot element (114) between said forward and aft ends. The invention is characterized in that the driving mechanism comprises a carrier element (112) fastened to a propeller axle (111) of the vessel (100) and being arranged to rotate with the said propeller axle (111), and in that the said drive point (120) is excentrically arranged on the carrier element (112) so that a rotation of the propeller axle (111) will drive the drive rod (122) back and forth, in turn resulting in a reciprocal up and down motion of the flexible fluke (125). The invention also relates to a method.

Fluke drive system for a vessel (100), comprising a pivot element (114) having a forward end and an aft end, which pivot element (114) is pivotally connected at the forward end to a hull (101) of the vessel (100) and which pivot element (114) is connected at the aft end to a flexible fluke (125); a driving mechanism having a drive point (120), which driving mechanism is arranged to impart a reciprocal or rotary movement to the drive point (120); and a drive rod (121) having a first end and a second end, which drive rod (121) is connected at the first end to the drive point (120) and at the second end to the pivot element (114), which second end is connected to the pivot element (114) at a point (122) along the pivot element (114) between said forward and aft ends. The invention is characterized in that the driving mechanism comprises a carrier element (112) fastened to a propeller axle (111) of the vessel (100) and being arranged to rotate with the said propeller axle (111), and in that the said drive point (120) is excentrically arranged on the carrier element (112) so that a rotation of the propeller axle (111) will drive the drive rod (122) back and forth, in turn resulting in a reciprocal up and down motion of the flexible fluke (125). The invention also relates to a method.

A linear drive system adapted for repetitive driving using a linear motor. The drive system may be used to power pumping hydrofoils which drive a boat or ship. Linkages are used to maintain the driven portion in linear motion. A coupled dual drive system in which two driven portions are coupled such that their coupled motions travel at the same velocity in opposed directions. The coupled linear drive system which may be used as a mechanical power source for drive systems used in transportation and industry. A boat with dual pumping hydrofoils adapted for propel a boat using the hydrofoils for both lift and propulsion.

A device for driving a primary shaft, the device including: a first system including an element for driving movement of a control member along a looped trajectory having two axial components; a second system including an element for pivoting the shaft about its longitudinal axis, actuated by the movement of the member along at least one component of the looped trajectory; a third system including an element for driving movement of the shaft, actuated by the movement of the control member along at least the other component of the looped trajectory, the control member projecting from the plane of the components and engaged with both the driving element for pivoting and for moving of the shaft, the movement of the control member along the looped trajectory generating a pivoting of the shaft in alternating directions and its movement in alternating directions.