An inner cylinder inside an outer cylinder is disposed to be coaxial to an air pressure supply rod inside the inner cylinder. A first piston is disposed between the air pressure supply rod and the inner cylinder, a pneumatic chamber is disposed on a side of one surface (hydraulic surface) of the first piston in the inner cylinder, and a first hydraulic chamber is disposed on a side of the other surface. A second piston is disposed between the outer cylinder and the inner cylinder, and a second hydraulic chamber is disposed on a side of a surface of the second piston which is provided in the same direction as the hydraulic surface of the first piston in both of the cylinders. The inner cylinder is provided with a communication hole for transmitting a negative pressure along with movement of oil with which the first hydraulic chamber and the second hydraulic chamber are filled. In this configuration, it is possible to shorten an overall length of a fluid pressure cylinder.

In a thrust expansion device, an opposite surface to be opposite to an output surface, on which an output-side lid and a stop lid through which an output rod enters and exits, are disposed, and a plurality of orthogonal surfaces orthogonal to the output surface are capable of being sealed by a sealing lid. A hydraulic chamber transmitting a thrust to a piston portion so as to communicate with an orthogonal surface side and an opposite surface side. In addition, a thrust expansion device includes an output unit having an output surface on which a piston portion and an output rod are disposed, an expansion unit having no output surface, and connecting unit connecting the output unit and the expansion unit.

A system for hydraulic systems includes a working cylinder (58) which operates as a consumer of hydraulic energy or as a generator of hydraulic energy. A hydraulic accumulator (1) can be charged by the working cylinder for storing energy and can be discharged for delivering energy to the working cylinder (58). One hydraulic accumulator is provided in the form of an adjustable hydropneumatic piston accumulator (1), in which with a plurality of pressure chambers (19, 21, 23, 25) adjoining effective surfaces (11, 13, 15, 17) of different sizes are on the fluid side of the accumulator piston (5). An adjusting arrangement (51) connects a selected pressure chamber (19, 21, 23, 25) or a plurality of selected pressure chambers (19, 21, 23, 25) of the piston accumulator (1) to the working cylinder (58) as a function of the pressure level that prevails respectively on the gas side of the piston accumulator (1) and on the working cylinder (58).

A pressure-limiting unit for a pressure booster for driving hydraulic tools. The unit includes a pneumatic unit that is driven by gas or air pressure, a hydraulic unit connected to the pneumatic unit and having a hydraulic port for connecting the hydraulic tool to the hydraulic unit in a fluid-tight manner and a pressure-limiting valve for adjusting the hydraulic pressure. The unit includes a closing element pushed against a valve seat by a spring element and having a displaceable adjusting element for adjusting the spring force of the spring element. To provide a pressure-limiting unit and a pressure booster for driving hydraulic tools with a pressure-limiting unit, which offer the possibility of making a precise adjustment of the hydraulic pressure in a simple way, the pressure-limiting unit includes a position detection unit connected to the adjusting element to detect the axial position of the adjusting element, an evaluation unit for determining the set hydraulic pressure as a function of the axial position, and an output unit for displaying the set hydraulic pressure.

A hydraulic system, preferably for actuating and engaging a mobile slurry pump, includes a primary circuit, actuating a first hydraulic consumer, which circuit has a hydraulic drive assembly including at least one motor-driven hydraulic pump. The hydraulic system further includes a secondary circuit, actuating a second hydraulic consumer, which circuit has a second hydraulic drive assembly including at least one additional motor-driven hydraulic pump. In a first operating state, hydraulic oil from a common tank can be admitted to the hydraulic consumers arranged in the primary circuit and in the secondary circuit via the hydraulic drive assemblies thereof, independently of one another. In a second operating state, a portion of the hydraulic oil is supplied from the primary circuit to the secondary circuit to actuate the second consumer.

Systems, devices, and methods for utilizing hydrostatic and/or hydraulic pressure to generate energy are disclosed herein. A representative industrial system can comprise a storage tank containing fluid, a separator piston having a first separator compartment configured to be fluidically coupled to the storage tank and a second separator compartment, and a pressure intensifier. The pressure intensifier includes a first compartment, and a second compartment fluidically coupled to the second separator compartment. The second compartment of the pressure intensifier includes a pressure concentrator having a housing, a piston head member including arms, a plurality of cylinders each defined in part by the housing, and a drive piston head portion.

Systems, devices, and methods for utilizing hydrostatic and/or hydraulic pressure to generate energy and to separate water into hydrogen and oxygen are disclosed herein. A representative industrial system can comprise a storage tank containing fluid, a separator piston having a first separator compartment configured to be fluidically coupled to the storage tank and a second separator compartment, and a pressure intensifier. The pressure intensifier includes a first compartment, and a second compartment fluidically coupled to the second separator compartment. The second compartment of the pressure intensifier includes a pressure concentrator having a housing, a piston head member including arms, a plurality of cylinders each defined in part by the housing, and a drive piston head portion. Pressurized water may be depressurized by sending it through fine bore friction channels to produce water vapor and/or steam, which may then be injected into plasma reactors that separate water into hydrogen and oxygen. Some embodiments may involve injecting a catalyst into the plasma reactors with the water vapor and/or steam.

A piston (8) is provided in a motor main body (4). A first motor chamber (9) is provided above the piston (8) and a second motor chamber (10) is provided below the piston (8). A pilot valve element (18) is provided so as to protrude from the piston (8). When a supply/discharge valve (13) is moved to its upper limit position or its lower limit position by the movement of the pilot valve element (18) in an up-down direction, a first valve member (25) of the supply/discharge valve (13) switches between supplying and discharging pressure fluid to and from the first motor chamber (9) and a second valve member (26) of the supply/discharge valve (13) switches between supplying and discharging pressure fluid to and from the second motor chamber (10).

Systems, devices, and methods for utilizing hydrostatic and/or hydraulic pressure to generate energy and to separate water into hydrogen and oxygen are disclosed herein. A representative industrial system can comprise a storage tank containing fluid, a separator piston having a first separator compartment configured to be fluidically coupled to the storage tank and a second separator compartment, and a pressure intensifier. The pressure intensifier includes a first compartment, and a second compartment fluidically coupled to the second separator compartment. The second compartment of the pressure intensifier includes a pressure concentrator having a housing, a piston head member including arms, a plurality of cylinders each defined in part by the housing, and a drive piston head portion. Pressurized water may be depressurized by sending it through fine bore friction channels to produce water vapor and/or steam, which may then be injected into plasma reactors that separate water into hydrogen and oxygen. Some embodiments may involve injecting a catalyst into the plasma reactors with the water vapor and/or steam.

A pneumatic unit for a hydropneumatic pressure booster has a system line that leads from a compressed air inlet to a compressed air outlet. A bypass line runs parallel to the system line and it is connected to the system line via first and second compressed air switches. A compressed air reservoir is connected in the bypass line, and a pressure intensifier is connected in the region between the first compressed air switch and the compressed air reservoir. The pneumatic unit makes available to the pressure booster a sufficiently high pneumatic pressure for carrying out at least one operational step of a connected hydraulic tool, even in the case of a pressure decrease or pressure failure in the supplying pneumatic line. For that purpose, the second compressed air switch is configured for switching the compressed air flow between the system line and the bypass line.