IP Library › Granted Patent US 12,552,508
Granted Patent B2
US 12,552,508 · App. 17/927,700 · Granted Feb 17, 2026

Hybrid propulsion system for boats and ships

Inventor: Christopher John Lee (Thatcham, GB)
Assignee: GREENERGY INVENTIONS INTERNATIONAL LTD
B63H21/20B63J3/04B63H2021/205B63J2003/046
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Quick Facts
Patent No.
US 12,552,508
App. No.
17/927,700
Granted
Feb 17, 2026
Kind
B2
Abstract

A Hybrid Vessel Propulsion and Generation System diesel jet drive outboard and inboard motors, with an electrical generator attached to a prop shaft of the motors to generate electricity to power batteries. On large boats or ships with a gear change, the generator is mounted on the back of the gearbox and is attached to the prop shaft, with the generator being driven by rotation of the prop shaft and the drive off the gearbox. The system also incorporates electrically powered water thrusters and mechanical pressurized water turbines used for charging the batteries. The system also incorporates electric motors attached to propellers powered by electric batteries. Solar Panels may be arranged in the port hole windows incorporating a housing, latch and lever arms to position them towards the sun.

Claims (35)

1 . A hybrid engine for vessels comprising:

a water vessel with a hybrid propulsion and an electrical energy generating unit,

a diesel engine with a propeller shaft and a propeller for propelling the vessel,

wherein the electrical energy generating unit includes an electrical generator for generating electricity from the rotation of the propeller shaft and is coupled to batteries for storing the generated electricity,

a plurality of electrical water turbines with turbine blades are housed in the intake of a water pipe, within the vessel's hull, and chambers are arranged within the vessel's hull, the water pipes and chambers are being interconnected,

wherein the turbine blades operate in a drive mode where they are driven by electrical energy to propel the vessel and a generation mode where the flow of water into the water pipes and chambers rotates the turbine blades to generate electricity,

wherein the pipe narrows at the end to generate extra water pressure, providing the vessel with extra thrust,

a plurality of external water turbines, the blades of which are mounted in a housing positioned on the outside of the vessel's hull, and each of the housing having a water inlet and a water outlet,

wherein the external water turbines are operated in a drive mode where the turbine blades are driven by electrical energy to act as thrusters in combination with the turbine housings to force water from the outlets and a generation mode where the turbine blades are rotated by the flow of water through the housings to generate electricity, and

a plurality of port hole windows having solar panels housed into the casing of the port hole windows, wherein the solar panels are connected to the electric batteries to store the generated electricity, and

wherein the casing of the port hole windows includes a latch with lever arms to adjust the position of the port hole windows towards the sun to create electricity to charge the electric batteries.

2 . The hybrid vessel propulsion and generating system according to claim 1 , wherein a gearbox is attached to the propeller shaft and the electrical generator is mounted on the gearbox, the electrical generator being rotated by the rotation of the propeller shaft and a drive of the gearbox.

3 . The hybrid vessel propulsion and generating system according to claim 1 , wherein on large vessels diesel jet drive outboard and inboard motors are provided.

4 . The hybrid vessel propulsion and generating system according to claim 1 , wherein the turbine blades in the water pipe intake and chambers are powered in the drive mode by 24 volts 5 horsepower electric motors.

5 . The hybrid vessel propulsion and generating system according to claim 1 , wherein the propulsion system further comprises electric motors, powered by the batteries, attached to propellers.

6 . The hybrid vessel propulsion and generating system according to claim 1 , wherein the water turbine blades, when in the generation mode, are connected to a power converter to produce electricity from rotational energy.

7 . The hybrid vessel propulsion and generating system according to claim 3 , wherein the diesel jet drive outboard motors are positioned at the bow of the vessel and the inboard motors are positioned midway along the hull.

8 . The hybrid vessel propulsion and generating system according to claim 1 , wherein the turbines in the water pipe intake are electrical and mechanical.

9 . The hybrid vessel propulsion and generating system according to claim 1 , wherein two water pipes are provided within the vessel's hull.

10 . The hybrid vessel propulsion and generating system according to claim 1 , wherein the chambers within the vessel's hull house mechanical turbine blades that generate electricity in the generation mode and create extra water pressure in the drive mode.

11 . The hybrid vessel propulsion and generating system according to claim 1 , wherein in the drive mode the turbine blades in the intake of the water pipe are positioned at the back of the intake and create pressure that forces water through the water pipe and creates a thrust at a water pipe outlet at the stem of the vessel.

12 . The hybrid vessel propulsion and generating system according to claim 1 , wherein the operation of the generation mode is dependent on the charging required for each of the batteries.

13 . The hybrid vessel propulsion and generating system according to claim 3 , wherein the batteries are also charged by the generator attached to the propeller shafts of the diesel jet drive outboard and inboard motors.

14 . The hybrid vessel propulsion and generating system according to claim 1 , wherein the turbine blades have a weighted bearing that helps the turbine blades to rotate through enhanced weight distribution.

15 . The hybrid vessel propulsion and generating system according to claim 9 , wherein the two water pipes run from bow to stem of the vessel on either side of the vessel, fixed in place by clamps as a permanent fixture.

16 . The hybrid vessel propulsion and generating system according to claim 4 , wherein the electric motors are mounted in the hull along the side of the water pipe intake.

17 . The hybrid vessel propulsion and generating system according to claim 1 , wherein at the end of the water pipe intake to create water pressure will be narrowed to create extra pressure which will give the vessel extra thrust.

18 . The hybrid vessel propulsion and generating system according to claim 1 , wherein the electric batteries are fixed in the hull of the vessel in a water tight casing to stop water penetration and electric fires or shocks and are positioned away from a diesel tank.

19 . The hybrid vessel propulsion and generating system according to claim 1 , wherein a diesel fuel tank is fixed in the hull with the fuel lines running to the diesel engine and diesel motors.

20 . The hybrid vessel propulsion and generating system according to claim 1 , wherein the turbine blades have a weighted bearing attached by a shaft, within a water tight casing, that runs from the turbine blades to a mechanical turbine mechanism within the hull of the vessel.

21 . The hybrid vessel propulsion and generating system according to claim 1 , wherein the batteries are held in the hull of the vessel and are connected to electric motors which rotate propellers, the batteries being charged by the water turbines when in generation mode.

22 . The hybrid vessel propulsion and generating system according to claim 4 , wherein the electric batteries are held in a water tight container fixed in the hull of the vessel, connected to the water turbines and the electric motors and positioned away from a diesel tank that is provided in a fixed in position within the hull and is connected to the diesel engine.

23 . The hybrid vessel propulsion and generating system according to claim 1 , wherein electric motors are provided inboard and are attached to a propeller shaft with propellers, the electric motors being powered by the batteries.

24 . The hybrid vessel propulsion and generating system according to claim 21 , wherein the electric motors and batteries are provided in a sealed unit within the hull of the vessel with an alarm trip/stop switch to stop charging in the event of water penetration.

25 . The hybrid vessel propulsion and generating system according to claim 3 , wherein all rotating components of the system are formed from Titanium, machined to a high-quality standard and a polymer material.

Assignments (2)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Sep 17, 2026
From: GREENERGY INVENTIONS INTERNATIONAL LTD
To: VESSEL HYBRID CHARGING LTD
Reel/Frame 076044/0730 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Nov 24, 2022
From: LEE, CHRISTOPHER JOHN
To: GREENERGY INVENTIONS INTERNATIONAL LTD
Reel/Frame 061869/0802 →
Priority Claims (1)
GB 20082125 · Jun 1, 2020 · national
Continuity (1)
Related Publication 20230134213A1 · May 4, 2023
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