A joint shaft includes at least one cross pin, the at least one cross pin including oppositely disposed pins on each of which a shaft member is attached; and a generator attached to at least one of the shaft members. The joint shaft may further include a sensor energized by the generator and attached to the joint shaft and/or a logic configured to evaluate an electrical output of the generator.

Various embodiments of the present invention are directed toward a linear combustion engine, comprising: a cylinder having a cylinder wall and a pair of ends, the cylinder including a combustion section disposed in a center portion of the cylinder; a pair of opposed piston assemblies adapted to move linearly within the cylinder, each piston assembly disposed on one side of the combustion section opposite the other piston assembly, each piston assembly including a spring rod and a piston comprising a solid front section adjacent the combustion section and a gas section; and a pair of linear electromagnetic machines adapted to directly convert kinetic energy of the piston assembly into electrical energy, and adapted to directly convert electrical energy into kinetic energy of the piston assembly for providing compression work during the compression stroke.

The multi-piston bladeless wind turbine creates electrical energy using hydraulically connected pistons. The system may include a disk, a small piston in fluid communication with a large piston, and a crankshaft attached to the large piston. The disk transfers forces from the wind to the small piston. Hydraulic fluid then transfers the forces to the larger piston. When the disk and associated small piston have been forced to the end of their stroke by the wind, a gate in the disk is opened to reduce wind force on the disk by allowing air to travel through the disk. Subsequently, the disk and associated small piston are pushed back to the beginning of the stroke by the pressure created by the large piston's weight. This process is repeated by closing the gate in the disk. A crankshaft powering an electric generator is turned by the movement of the large piston.

Disclosed herein are various wireless power electropermanent magnets and related systems and devices, including handheld wands for activating and deactivating wireless power electropermanent magnets, and coupling and locking mechanisms utilizing wireless power electropermanent magnets.

The multi-piston bladeless wind turbine creates electrical energy using hydraulically connected pistons. The system may include a disk, a small piston in fluid communication with a large piston, and a crankshaft attached to the large piston. The disk transfers forces from the wind to the small piston. Hydraulic fluid then transfers the forces to the larger piston. When the disk and associated small piston have been forced to the end of their stroke by the wind, a gate in the disk is opened to reduce wind force on the disk by allowing air to travel through the disk. Subsequently, the disk and associated small piston are pushed back to the beginning of the stroke by the pressure created by the large piston's weight. This process is repeated by closing the gate in the disk. A crankshaft powering an electric generator is turned by the movement of the large piston.

A bladeless wind turbine may include a flexible support rod mounted on a support surface, an elongated rigid mast mounted on the flexible support rod, and a natural tuning mechanism coaxially mounted around a first portion of the flexible support rod. A natural tuning mechanism may include a housing coaxially attached to the flexible support rod, at least one extendable tube slidably housed within the housing and coaxially mounted and fitted around the flexible support rod. At least one extendable tube may be slidably moveable along the main axis of the flexible support rod and may be extendable beyond the top end of the housing by a predetermined height. A bladeless wind turbine may further include a control unit that may be coupled to the natural tuning mechanism and may be configured to urge the at least one extendable tube to extend beyond the top end of the housing by a predetermined height, where the predetermined height may be calculated by the control unit based on the wind and the elongated rigid mast.

A display device, including a backplane, and a power generation component disposed on the backplane for converting kinetic energy generated by movement of the display device into electric energy and supplying power to the display device using the generated electric energy, the power generation component includes a generator, and a swing component with an eccentric structure, the swing component being connected to the generator and swingable during movement of the display device, so as to drive the generator to operate.

Modern living involves using a significant amount of energy, much of which may be wasted or not used efficiently. This apparatus and methodology focuses on potentially wasted energy that is being produced by ambient vibration. Bi-modal broad band energy and/or specific frequency harvester/scavengers utilize the physics of local resonance in acousto-elastic metamaterials (AEMM structures). Frequency selectivity of a harvester depends on the mass of a core resonator, soft material that houses the central mass/resonator, and the base material which is used to manufacture the metamaterial. Piezoelectric materials are known to produce electrical current when they are deformed mechanically. Ambient energy is available in the form of vibration and noise, e.g. car vibration, acoustic noise from heavy machineries, vibration from rails, which is lost, if not otherwise harvested. A smart metamaterial can scavenge/harvest ambient low frequency vibration for charging batteries such that the ambient energy may become a renewable source of energy to power low power electronic gadgets on the go. Power output for a unit cell AEMM embodiment is optimized through one or more of multi-frequency/multi-modal harvesting, geometric optimization, and PZT position optimization.

A converting device arranged to transfer thermodynamic energy of a compressed working fluid into electrical energy. The converting unit is comprised of at least one cylinder which encloses a piston. In an embodiment, said at least one piston is provided with a magnetic portion. A ferromagnetic coil surrounds the piston and is integrated with the cylinder. As the piston moves through the coil, electrical energy is generated.

The invention provides a power generation device including a magnetic conduction member, an induction assembly, and a magnet assembly. The induction assembly includes a magnetic core and a coil wound around the magnetic core. A first end of the magnetic core is connected to the magnetic conduction member. The magnetic conduction member includes a first magnetic conduction sheet and a second magnetic conduction sheet. When a second end of the magnetic core is contacted by the second magnetic conduction sheet, a first magnetic circuit is formed, and a magnetic line of the magnetic core is along a first direction. When the second end of the magnetic core is contacted by the first magnetic conduction sheet, a second magnetic circuit is formed, and a magnetic line of the magnetic core is along a second direction opposite to the first direction.