The present invention is a connector for an inflatable member. A portion of the connector extends within an internal volume of the inflatable member to define a recess for accepting a structural connection. The connector has an air-impermeable surface that is configured to maintain integrity of the inflatable member to allow the internal volume to be pressurized when the connector is bonded to an opening in a surface of the inflatable member. The connector can optionally pass through the opposing surface or otherwise engage the opposing surface to enhance its structural properties.

The invention relates to a hydrofoil for a watercraft including a fuselage and two wings arranged on either side of the fuselage and designed to provide hydrodynamic lift to the hydrofoil when it is moving through the water. According to the invention, the two wings are rotatable relative to the fuselage between a deployed position when the hydrofoil is stationary, and a retracted position towards a rear part of the fuselage by the water pressure exerted on the wings when the hydrofoil is moving through the water.

The invention relates to a trim stabilizer device comprising a foil being structurally independent from the transom of a boat to which it is to be mounted and being tiltable around its transversal axis; a first actuator associated with the foil for tilting thereof; a adjusting arm associated with the foil, at one end, for making a vertical motion thereof relative to the transom, and at the other end, associated with a connecting member provided on the transom. The trim stabilizer device for boats comprises a second actuator for making a vertical motion by a non-manual force of the adjusting arm.

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.

The present disclosure provides generally for a hydrofoil system that may allow a surfboard to glide above the water surface. According to the present disclosure, a rider may be able to manipulate a hydrofoil device attached to a surfboard with limited training and athletic ability. The present disclosure provides for a hydrofoil system that may allow riders to use a light leaning motion to adjust the angle of a front wing to create forward thrust to produce a flow for creating lift. In some aspects, the front wing may tilt to reduce downward drag force in a lifting phase while locking into place during a glide to provide a sustained lift of the paddleboard out of the water.

A sail boat propulsion and stabilisation system. The system uses a device to substantially increase the performance of sail or motor boats by reducing the displacement to increase speed and comfort during sailing, due to its light weight and dynamics. The system comprises a control panel connected to a hydraulic group which actuates the device. The device is provided with a keel wing and a counterbalance or lift wing joined by a bulb, a cylindrical actuator for the counterbalance and lift wing, a hydraulic rotary actuator for hoisting the assembly, an articulation shaft, and a tilting shaft for the assembly which is coupled to the broadside or to the mounting base beside sensors of the angle of attack of the counterbalance wing. The hydraulic group and the cylindrical hydraulic actuator are optionally replaced by a cylindrical electric actuator connected to the control panel and acting upon the counterbalance wing.

The present disclosure provides generally for a hydrofoil system that may allow a surfboard to glide above the water surface. According to the present disclosure, a rider may be able to manipulate a hydrofoil device attached to a surfboard with limited training and athletic ability. The present disclosure provides for a hydrofoil system that may allow riders to use a light leaning motion to adjust the angle of a front wing to create forward thrust to produce a flow for creating lift. In some aspects, the front wing may tilt to reduce downward drag force in a lifting phase while locking into place during a glide to provide a sustained lift of the paddleboard out of the water.

The present invention relates generally to underwater wings for providing lift to boats. More particularly, the invention comprises an underwater wing that attaches to the hull or hulls of a pontoon or tri-toon boat. The purpose of the wing is to provide a designated amount of lift to reduce drag and improve performance of the watercraft. This is different from a traditional hydrofoil, which is designed to lift a boat completely out of the water.

The invention relates to a hydrofoil for a watercraft including a fuselage and two wings arranged on either side of the fuselage and designed to provide hydrodynamic lift to the hydrofoil when it is moving through the water. According to the invention, the two wings are rotatable relative to the fuselage between a deployed position when the hydrofoil is stationary, and a retracted position towards a rear part of the fuselage by the water pressure exerted on the wings when the hydrofoil is moving through the water.

A boat for operation in water has a hull longitudinally extending between a bow and a stern and laterally extending between a port side and a starboard side, a hydrofoil suspended from the hull, wherein as the boat moves through the water the hydrofoil is configured to create a lifting force for lifting the hull upwardly out of water, and a weed deflector located between the hydrofoil and the bow, wherein the weed deflector is configured to deflect weeds away from the hydrofoil.