Abstract: A work machine includes a first hydraulic circuit, a second hydraulic circuit, a single electric motor, and a controller. The first hydraulic circuit includes a first pump and a first valve. The first pump is configured to drive a first group of hydraulic accessories. The second hydraulic circuit includes a second pump and a variable pressure valve. The second pump is configured to drive a second group of hydraulic accessories. The single electric motor is connected/configured to drive the first pump and the second pump. The controller configured to estimate a torque of the second pump, estimate a total torque of the motor as a sum of a current operating torque of the motor and the estimate of the torque of the second pump, and, on condition the total torque of the motor is greater than a threshold torque, lower an operating torque of at least one of the first pump or the second pump.

Abstract: The present invention aims to provide a work machine capable of performing tasks with high precision by preventing the deterioration of speed responsiveness of the hydraulic cylinder driving the working device, as well as preventing the hydraulic cylinder from surging or deviating. To achieve this, the controller calculates the correction value for the target operating pressure of the flow control valve to keep the meter-out pressure of the hydraulic cylinder, measured while driving the hydraulic cylinder to perform a predetermined operation on the working device, within a range from a predetermined first lower limit to a predetermined first upper limit, and corrects the target operating pressure according to the correction value.

Abstract: The application pertains to a process for subsea power generation and fluid utilization from open water currents. In one embodiment the process comprises channeling water from a subsea current through a pipe system constructed to withstand subsea pressures; creating a water hammered pressurized fluid within the pipe system; directing the water hammered pressurized fluid through a delivery valve; and using the water hammered pressurized fluid.

Abstract: A valve arrangement includes a plurality of hydraulic rail ports each configured to be coupled to a pressure rail, a plurality of hydraulic chamber ports each configured to be coupled to a chamber of one or more actuators, a plurality of proportional valves each corresponding to one of the plurality of hydraulic chamber ports, one or more sets of on-off valves and check valves coupling two or more hydraulic rail ports to each of the supply sides of each of the plurality of proportional valves, and one or more sets of on-off valves and check valves coupling two or more hydraulic rail ports to each of the return sides of each of the plurality of proportional valves, wherein electively operating each of the on-off valves and the proportional valves provides selective pressure or flow to each one of the plurality of hydraulic chamber ports.

Abstract: A plurality of control valves (39A to 39D, 40A to 40D, 41A to 41D, 42A to 42D, 43) is aligned and disposed in the right-and-left direction and in the vertical direction on a first mounting surface (38C) and a second mounting surface (38D). Further, a plurality of control valves (47, 48) is aligned and disposed in the right-and-left direction and in the vertical direction on a first mounting surface (46B) and a second mounting surface (46C).

Abstract: The disclosure herein relates to a single acting hydraulic cylinder (100) configured to provide a smooth extension stroke of a piston (102). The cylinder (100) includes a piston rod (108) connected to the piston (102), wherein the piston rod (108) has a plurality of orifices (110) defined at pre-determined positions, and the piston (102) has a groove (106) defined in fluid communication with the orifices (110) and a fluid gallery (104) defined in the piston (102). The orifices allow fluid to flow from an annular side chamber (124) to a full-bore side chamber (125) via the fluid gallery at end of extension stroke, to gradually dampen impact of the piston (102) with a cylinder head end cover (130). The cylinder prevents jolts and jerks in a hydraulic system, provides better control, and ease in operation.

Abstract: A closed-circuit pipe group (30) that constitutes a closed circuit system (25 to 28) is distributed through upper positions of a closed-circuit hydraulic pump (29) and an open-circuit hydraulic pump (35) along an upper surface plate (22) of a housing (20). Further, an open-circuit pipe group (36) that constitutes an open circuit system (31 to 34) is distributed through lower positions of the closed-circuit hydraulic pump (29) and the open-circuit hydraulic pump (35) along a revolving frame (8). Therefore, a working space for performing operational work can be formed between the closed-circuit pipe group (30) and the open-circuit pipe group (36).

Abstract: An energy storage system includes a pneumatic vessel, a cable system attached to the vessel, a compressor for pressurizing the vessel, a generator attached to the cable system, a turboexpander generator for receiving compressed air from the vessel, and a control system. The system deflates and allows the vessel to sink in a body of water, inflates the vessel to store energy when an abundance of it exists, and allows the inflated vessel to resurface to release its buoyant energy to the generator via the cable system and to release compressed air to the turboexpander generator to generate electricity when electricity demand is high and/or electricity generation from other sources is low.

Abstract: A process for start-up of a propulsion system for a vehicle displacement component. The propulsion system includes a hydraulic pump, a hydraulic motor fed by the hydraulic pump via a closed-loop hydraulic circuit, and an electric motor. The process for start-up includes the following steps, given a configuration when the propulsion system is at a standstill, in which the electric motor, the hydraulic pump and the feed pump are at a standstill, and the hydraulic motor is disengaged: start-up of the feed pump, starting up of the electric motor, setting in rotation of the hydraulic pump, adjustment of the displacement of the hydraulic pump and/or of the rotational speed of the electric motor for providing a flow rate corresponding to a setpoint on the hydraulic motor, start-up of the hydraulic motor.

Abstract: A fastening system for fastening an annular body, in particular a covering cap, end shield, or the like. The fasting system includes an annularly extending side wall having an outer side and an inner side and comprising a collar which projects radially from the outer side, to an element, in particular a housing, hydraulic block or the like, which includes a receiving region for the collar. For fastening the annular body to the element, the element is or will be plastically deformed in such a way that the material of the element is or will be displaced to engage behind the collar. The element includes an annular recess having a caulkable lateral outer wall and having a retaining contour which is radially spaced apart from the lateral outer wall. The retaining contour is configured to interact in a form-fitting manner with the collar.

Abstract: An autonomous vacuum includes mopping and sweeping functionalities. A magnetic locking system secures a cleaning head of the autonomous vacuum into a mopping position when in a mopping state, allowing the vacuum to move a mop roller back and forth to scrub stubborn stains on a floor surface without the cleaning head shifting into an alternate sweeping position. The autonomous vacuum also includes snorkel ducts to direct fluid waste and water from the mop roller to a waste bag without mixing the fluid waste with dry waste collected by a sweeping system. The snorkel ducts are configured to kink shut when the cleaning head is in a sweeping state, to avoid unnecessary suction through the snorkel system. Additionally, the mopping system includes cleaning logic routines that can sense and control mop roller saturation and drying, and that can perform automatic mop cleaning.

Abstract: A self-propelled work vehicle includes a vehicle frame and a plurality of wheels or tracks supporting the vehicle frame from a ground surface. A battery provides electrical power to an electric motor. A hydraulic pump provides hydraulic fluid to a hydraulic system. A steering valve directs hydraulic fluid from the hydraulic system to a steering actuator. A steering priority valve prioritizes supply of hydraulic fluid from the hydraulic system to the steering valve. A proportional relief valve provides a load sense signal to the load sense port of the steering priority valve which shifts the steering priority spool to build hydraulic system pressure. A controller is configured to detect whether the battery is able to be further charged and to control operation of the proportional relief valve to control a hydraulic braking function provided by the steering priority valve.

Abstract: A wind-based power generation system including a base, a plurality of towers including a plurality of turbines, at least one pneumatic pump, at least one pneumatic motor, at least one pneumatic generator, an air storage chamber, and a tail component. The wind-based power generation system receives wind via the plurality of turbines and transmit the airflow to pneumatic pumps and motors to power a generator.

Abstract: A substrate polishing apparatus includes; a platen including an upper surface configured to perform a polishing process on a semiconductor substrate, a slurry supply configured to supply slurry to the upper surface of the platen, wherein the slurry includes aqueous solution and abrasive particles, a collection pipe disposed under the platen and configured to guide the slurry, wherein the collection pipe includes a vertical guide pipe and a lateral guide pipe, a collection device disposed on an outer surface of the collection pipe, wherein the collection device includes an alternating arrangement of magnetic separators configured to separate the abrasive particles from the slurry using an electromagnetic force and sonicators configured to decompose the abrasive particles, and a collection tank connected to the collection pipe and configured to store the abrasive particles separated from the slurry by the collection device.

Abstract: This hydraulic drive device supplies and drains a working fluid to and from a hydraulic cylinder and includes: a plurality of hydraulic pump motors including suction ports and discharge ports; a plurality of electric motors respectively connected to the plurality of hydraulic pump motors; and a directional control valve that is connected to a meter-out passage and connects the hydraulic cylinder to the meter-out passage to drain the working fluid from the hydraulic cylinder to the meter-out passage. The suction ports of the plurality of hydraulic pump motors are connected in parallel with the meter-out passage.

Abstract: Disclosed herein are components, systems, and methods for sealing and pressurizing fluids at eccentric temperatures. Embodiments of a high-pressure system include static seals, dynamic seals, or both. A fluid tight seal formed between abutting surfaces of stationary, adjacent components is movable, via rolling contact between the abutting surfaces, as a temperature of the adjacent components enters the eccentric temperature range. The materials of the adjacent components may be selected based on their thermal expansion and contraction characteristics, and respective geometries of components of the high-pressure system may be selected to maintain a minimal gap between moving, adjacent components of the high-pressure system.

Abstract: A piston for a compressor comprises a piston rod which defines a longitudinal axis, and a piston ring package with a carrier sleeve which extends along the longitudinal axis, is arranged on a circumferential surface of the piston rod and is releasably fastened to the piston rod, and a plurality of piston ring devices arranged next to one another along the longitudinal axis, which are arranged on an outer circumferential surface of the carrier sleeve and are fastened to the carrier sleeve, the carrier sleeve preferably having a mechanical interface for attaching a withdrawal tool for applying a force directed along the longitudinal axis.

Abstract: This work machine includes: a first hydraulic cylinder and a second hydraulic cylinder that telescope a telescopic boom on the basis of hydraulic oil supply and discharge, a switching valve that is disposed on a pressure relief circuit for connecting the first hydraulic cylinder and the second hydraulic cylinder to a tank, and a control unit that causes the switching valve to connect the first hydraulic cylinder to the tank and releases the pressure in the first hydraulic cylinder when contracting or extending the second hydraulic cylinder in a condition in which the first hydraulic cylinder is contracted.

Abstract: A method for manufacturing an electrode includes the steps of (a) laminating an active material layer on the surface of the current collector; and (b) removing a portion of the active material layer by irradiating a laser beam on the surface of the active material layer. Before irradiating the active material layer with a laser beam in step (b), a process of supplying moisture to the active material layer is performed. A system for manufacturing an electrode according to the above method is also provided.

Abstract: A patient handling apparatus includes a patient support surface, a base, and a hydraulic circuit. The hydraulic circuit includes a pump, a fluid reservoir, and a hydraulic cylinder operable to selectively raise or lower the patient support surface or the base. The hydraulic circuit controls flow of fluid between the cylinder and the fluid reservoir to thereby control the movement of the base or patient support surface. In addition, the hydraulic circuit may include a manual bypass circuit configured to bypass the pump in response to a manual input, which allows manual extension or retraction of the cylinder, for example, when the pump is not operational. The hydraulic circuit may also include a pump bypass circuit configured to bypass the pump to allow fluid to discharge from the cap end to the fluid reservoir for faster evacuation of fluid from the cylinder, thereby increasing retraction speed of the rod.