Abstract: Techniques for maintenance-free on-demand high-efficient hydrogen generation using a small amount of electricity are described. A piece of foam is provided in the fluid used to generate the hydrogen. The foam, similar to a sponge structure, includes a plurality of open cells to accommodate the fluid. In a sense, the foam has been made to have the maximum contact with the fluid. When applied on with an electrical power (current or voltage), the fluid causes electrolysis and pyrolysis to happen so as to generate hydrogen and oxygen (oxy-hydrogen). Depending on implementation, the electrical power is electronically pulsed electricity and helps drive the fluid in a container to vibrate at an electrical resonance of the container.

Abstract: Improved structures of cooling systems that may be used in air conditioning or refrigeration are described. To achieve a high efficiency in converting cooling effect from one or more cooling units, antifreeze liquid used to absorb the cooling effect is forced to pass through a box or container made out of graphite or thermally conductive metal or alloy holding a sponge-like structure or foam, also made out of graphite or thermally conductive metal or alloy, where the foam including open cells provides maximum surface contact with the liquid. Further the liquid is sprayed or vaporized onto the foam and passes through the foam by gravity or pressure. The cooled liquid is exited from the container for use in air conditioning or refrigeration.

Abstract: Improved structures of cooling systems that may be used in air conditioning or refrigeration are described. To achieve a high efficiency in converting cooling effect from one or more cooling units, antifreeze liquid used to absorb the cooling effect is forced to pass through a box or container made out of graphite or thermally conductive metal or alloy holding a sponge-like structure or foam, also made out of graphite or thermally conductive metal or alloy, where the foam including open cells provides maximum surface contact with the liquid. Further the liquid is sprayed or vaporized onto the foam and passes through the foam by gravity or pressure. The cooled liquid is exited from the container for use in air conditioning or refrigeration.

Abstract: The machine casing (1) comprises at least two casing parts (2; 3, 4) assembled mechanically together by clamping members (5, 6), the two casing parts being both made from metal, one at least (2) of these two casing parts (first part) being subjected to deforming forces likely to cause relative micromovements of the two opposite faces of these two casing parts, said first part (2) being made from a metal of relatively low hardness. Between the opposite faces of the two casing parts is inserted a plate (7) corresponding to the contour of the opposite faces of the two casing parts but having an area substantially less than that of the surface of said opposite faces of the two casing parts; the plate (7) is made from a metal of a hardness greater than that of a metal forming said part (2) and the corresponding edge (8;9) of the plate is sufficiently sharp to bite into the metal of relatively low hardness.

Abstract: A gear pump or motor comprises a tubular casing having an internal shoulder and an inlet and outlet for working fluid. A pair of meshing gearwheels are each mounted in the casing between a pair of rigid bearings which are disposed one on either side of the shoulder adjacent respective end plates closing the ends of the casing. Screws passing through the shoulder are provided for clamping the shoulder between the bearings and end plates. In an unclamped condition of the shoulder, the difference between the axial lengths of the shoulder and the gearwheels is greater than a predetermined operating clearance between the gearwheels and the bearings. In a clamped condition of the shoulder in the normal operating conditions of the pump or motor, the shoulder is resiliently deformed to reduce the said difference to a value at most equal to the predetermined clearance.