Abstract: A plant for producing mechanical energy from a carrier fluid under cryogenic conditions, including a cryogenic tank configured for storing the carrier fluid under cryogenic conditions and a capacitive tank. The plant further includes a supply circuit, arranged as a connection between the cryogenic tank and the capacitive tank and comprising a pump configured to increase the pressure of the carrier fluid. The plant provides an engine body, configured for producing mechanical energy and including at least one work chamber having an inlet port, arranged in fluid communication with the capacitive tank, and an outlet port connected to a discharge circuit for the spent carrier fluid, and a recirculation circuit designed to convey a portion of the spent carrier fluid into the capacitive tank.

Abstract: A plant (1) for producing mechanical energy from a carrier fluid under cryogenic conditions, comprising a cryogenic tank (10) configured for storing the carrier fluid under cryogenic conditions and a capacitive tank (20). The plant (1) further comprises a supply circuit (30), arranged as a connection between the cryogenic tank (10) and the capacitive tank (20) and comprising a pump (31), configured to increase the pressure of the carrier fluid, and a main heat exchanger (32), arranged downstream of the pump (31) and configured to promote a thermal exchange between a thermal source and the carrier fluid so as to increase the temperature of the carrier fluid and evaporate the carrier fluid.

Abstract: An engine assembly (6) of the type running on liquid air or another gas that is substantially inert in liquefied state, for a vehicle in general and for an urban motor vehicle in particular, such as a bus (1) or a taxi, comprises a Stirling engine (9), in which the gasification of the liquid air takes place, with transformation into kinetic mechanical energy of the latent heat relative to the change in state of the air from liquid state to compressed gas state, as well as a volumetric or flow motor (11), in which the air in compressed state expands up to a pressure substantially equal to atmospheric pressure, with transformation of the mechanical pressure energy into kinetic mechanical energy.

Abstract: A method for converting solar radiation in mechanical power, for generating electrical power, having an extraordinarily high efficiency, comprising the steps of feeding a hot fluid heated by a solar device to a hot cylinder of a Stirling engine and feeding a cold fluid, cooled in the absorption stage of an absorption refrigeration apparatus to a cold cylinder of the Stirling engine, obtaining mechanical power from the Stirling engine, for actuating an electrical generator.

Abstract: An engine assembly (6) of the type running on liquid air or another gas that is substantially inert in liquefied state, for a vehicle in general and for an urban motor vehicle in particular, such as a bus (1) or a taxi, comprises a Stirling engine (9), in which the gasification of the liquid air takes place, with transformation into kinetic mechanical energy of the latent heat relative to the change in state of the air from liquid state to compressed gas state, as well as a volumetric or flow motor (11), in which the air in compressed state expands up to a pressure substantially equal to atmospheric pressure, with transformation of the mechanical pressure energy into kinetic mechanical energy.

Abstract: An engine unit, particularly for urban transport, comprising an engine (3) supplied with a compressed gas and having a expansion chamber (9), a liquid gas tank (28) in communication with the engine (3), and means (M, M?) for gasifying the liquid gas, which are interposed between the liquid gas tank (28) and the engine (3) for obtaining compressed gas. The gasifying means (M) comprise a gasification chamber (22) in communication with the liquid gas tank (28) and a liquid fuel tank (39) which is connected to the gasification chamber (22). The gasification chamber (22) is in fluid communication with both the liquid fuel tank (39) for the combustion of the liquid fuel with the oxygen of the liquid gas (22), and the expansion chamber (9) so that the compressed liquid gas and gaseous products of combustion process are used to do useful work.

Abstract: An engine unit, particularly for urban transport, comprising an engine (3) supplied with a compressed gas and having a expansion chamber (9), a liquid gas tank (28) in communication with the engine (3), and means (M, M?) for gasifying the liquid gas, which are interposed between the liquid gas tank (28) and the engine (3) for obtaining compressed gas. The gasifying means (M) comprise a gasification chamber (22) in communication with the liquid gas tank (28) and a liquid fuel tank (39) which is connected to the gasification chamber (22). The gasification chamber (22) is in fluid communication with both the liquid fuel tank (39) for the combustion of the liquid fuel with the oxygen of the liquid gas (22), and the expansion chamber (9) so that the compressed liquid gas and gaseous products of combustion process are used to do useful work.

Abstract: A method for making knots (4) of retaining nets (1), such as rock and avalanche fences, wherein a knot (4) consists of a first and a second rope (2,3) crossing over each other and a junction binding said ropes (6), comprises the steps of placing a first and a second U element (7,8) astride said first rope (2) and adjacent to said second rope (3) on opposite sides thereof, linking the ends (7d,7e) of the first U element (7) to the ends (8d,8e) of the second U element (8) by means of bridge elements (9d,9e) overlying said second rope (3), and clamping said second bridge elements (9d, 9e) on said second rope (3). With such a method a very strong and simple knot (4) can be speedily obtained.

Abstract: A method for making knots (4) of retaining nets (1), such as rock and avalanche fences, wherein a knot (4) consists of a first and a second rope (2,3) crossing over each other and a junction binding said ropes (6), comprises the steps of placing a first and a second U element (7,8) astride said first rope (2) and adjacent to said second rope (3) on opposite sides thereof, linking the ends (7d,7e) of the first U element (7) to the ends (8d,8e) of the second U element (8) by means of bridge elements (9d,9e) overlying said second rope (3), and clamping said second bridge elements (9d, 9e) on said second rope (3). With such a method a very strong and simple knot (4) can be speedily obtained.

Abstract: In a rope-making machine of type having a number of reel-carrying cradles aligned along an axis and oscillating about this axis, and a number of strand guide structures supported about the cradles and coaxially with the axis, the alignment of cradles constitutes a rigid beam supported at its ends and the strand guide structures are supported along this beam.