An agricultural machine or implement has a main frame section and at least one wing section, each having lift cylinders. A main shank frame may be pivotally attached to the main frame section and may have hydraulically adjustable gauge wheels. Wing shank frames may be pivotally attached to the wing sections and may also have hydraulically adjustable gauge wheels. Bypass circuits may be used to individually adjust the lift cylinders and gauge wheel cylinders. A controller or controllers is used to purge air from the lift cylinders, gauge wheel cylinders, cylinders used to raise the shank frames for transport, and from the bypass circuits. The purge routine may be selectable as individual steps, hydraulic subsystem purges, or as one automatic purge routine.

An agricultural machine or implement has a main frame section and at least one wing section, each having lift cylinders. A main shank frame may be pivotally attached to the main frame section and may have hydraulically adjustable gauge wheels. Wing shank frames may be pivotally attached to the wing sections and may also have hydraulically adjustable gauge wheels. Bypass circuits may be used to individually adjust the lift cylinders and gauge wheel cylinders. A controller or controllers is used to purge air from the lift cylinders, gauge wheel cylinders, cylinders used to raise the shank frames for transport, and from the bypass circuits. The purge routine may be selectable as individual steps, hydraulic subsystem purges, or as one automatic purge routine.

A fluid energy harvester, including a housing having at least one port and an outlet, and the housing defining at least one fluid passageway therein. The fluid energy harvester also includes a converter disposed within the housing and configured to convert at least a portion of potential energy in an exhaust fluid, a generator operably coupled to the converter and configured to generate an electrical current from the converter, a charging controller electrically coupled to the generator, and a storage medium electrically coupled to the generator and configured to store the electrical current generated by the generator. The fluid energy harvester further includes a nozzle configured to control a flow of the exhaust fluid.

A fluid energy harvester, including a housing having at least one port and an outlet, and the housing defining at least one fluid passageway therein. The fluid energy harvester also includes a converter disposed within the housing and configured to convert at least a portion of potential energy in an exhaust fluid, a generator operably coupled to the converter and configured to generate an electrical current from the converter, a charging controller electrically coupled to the generator, and a storage medium electrically coupled to the generator and configured to store the electrical current generated by the generator. The fluid energy harvester further includes a nozzle configured to control a flow of the exhaust fluid.

An attitude-supporting apparatus of a wearable robot includes an actuator for generating a hydraulic pressure by a worker's direct manipulation, and a driving unit including, the driving unit including: an inner component and an outer component capable of relatively rotating, and control components for controlling the relative rotations of the inner component and the outer component, wherein a motion of the control components is controlled by receiving the hydraulic pressure generated from the actuator.

An attitude-supporting apparatus of a wearable robot includes an actuator for generating a hydraulic pressure by a worker's direct manipulation, and a driving unit including, the driving unit including: an inner component and an outer component capable of relatively rotating, and control components for controlling the relative rotations of the inner component and the outer component, wherein a motion of the control components is controlled by receiving the hydraulic pressure generated from the actuator.

A cryogenic fluid pump includes a drive assembly and a pumping assembly. The drive assembly includes a cylinder. The cylinder includes an annular dump channel formed in and extending about an interior wall of the cylinder. A piston is reciprocatable within the cylinder between a first and second position. A hydraulic pressure chamber is defined by the cylinder and the piston. The piston includes an axial spill passage in communication with the pressure chamber and a transverse spill passage in communication with the axial spill passage. The transverse spill passage includes a piston dump port which is sealed to the cylinder in the first position and in the second position unsealed to the cylinder to permit fluid exit from the pressure chamber. The second position includes an over travel state and the dump area of the piston dump port when unsealed to the cylinder increases as the piston advances.

A radial crank external heated engine having multiple alignments of pistons radial to multiple collinear rotary valves, multiple crankshafts connected to alignments of pistons, and a common output shaft connected to the crankshafts. A heat conductive working fluid is cycled to the engine from a heat producing external energy source via a slotted channelled tube extended centrally through the rotary valves. The rotary valves have intake and exhaust sections that communicate with the channelled tube and provide means working fluid exchange with respective pistons at timed intervals. The pistons are reciprocally driven by the entry of pressurized work fluid in the cylinder, and the resulting motive power is transferred along the crankshafts to the output shaft where it can be harnessed.

A radial crank external heated engine having multiple alignments of pistons radial to multiple collinear rotary valves, multiple crankshafts connected to alignments of pistons, and a common output shaft connected to the crankshafts. A heat conductive working fluid is cycled to the engine from a heat producing external energy source via a slotted channelled tube extended centrally through the rotary valves. The rotary valves have intake and exhaust sections that communicate with the channelled tube and provide means working fluid exchange with respective pistons at timed intervals. The pistons are reciprocally driven by the entry of pressurized work fluid in the cylinder, and the resulting motive power is transferred along the crankshafts to the output shaft where it can be harnessed.

A sliding component and its producing method are provided. The sliding component includes a base section made of steel or cast iron, and a sliding section having a sliding surface, made of copper alloy including hard particles, and joined to the base section. The hard particles in the sliding section are arranged such that those in a region including an outer periphery of the interface with the base section have their longitudinal directions coinciding with the directions along the outer periphery as compared to those in an inner peripheral side. This improves the durability of the sliding section in its region including the outer periphery of the interface with the base section.