Abstract: A linear pump assembly includes a cylinder piston disposed in a generally tubular internal cylinder chamber defined within a cylinder housing having first and second ends, a first plunger-cylinder rod securely coupled to a first end of the cylinder piston and disposed in a first generally tubular internal plunger chamber defined within a first plunger housing in linear alignment with the cylinder housing, and a second plunger-cylinder rod securely coupled to a second end of the cylinder piston and disposed in a second generally tubular internal plunger chamber defined within a second plunger housing in linear alignment with the cylinder housing and the first plunger housing. First and second fluid ends are coupled to the first and second plunger housings respectively, the first and second fluid ends each housing a suction valve and a discharge valve.

Abstract: A filter adaptor joins a canister filter to a hydraulic manifold block. The adaptor includes a hexagonal tool-receiving portion, an outflow passageway and one or more inflow passageways. The outlet flow passageway extends between opposed ends of the adaptor, and is used to direct filtered fluid from the filter to the manifold block. The inlet flow passageway(s) extend between the one end and a sealed region of the adaptor, and are used to direct fluid from the manifold block to the filter. The adaptor includes auxiliary ports formed in the tool-receiving portion that communicate with the inlet flow passageways and permit monitoring thereof.

Abstract: A closed-circuit, self-contained hydraulic axis includes an electric motor, a hydraulic cylinder configured to be connected to a load and a main pump driven by the electric motor to pump hydraulic fluid through the circuit. Pressure connections of the pump are connected to the respective chambers of the cylinder such that the cylinder rod is configured to extend and retract depending on a direction of flow of the hydraulic fluid through the main pump. The hydraulic axis includes a main accumulator connected to the pump via first control valve, an energy storage accumulator connected to the pump via a second control valve, and a charge pump. The hydraulic axis is switchable between a first operating mode that is free of energy storage in the energy storage accumulator, and a second operating mode in which energy is stored in the energy storage accumulator.

Abstract: An electrohydraulic system configured to operate a number of snow-removal components associated with a vehicle. The electrohydraulic system may comprise a controller, a number of actuators in electrical communication with the controller, a user interface in electrical communication with the controller, and a number of input regulators operable to regulate the control of the actuators.

Abstract: A rotary electrohydraulic actuator includes a direct drive hydraulic motor having an output shaft through opening that is concentric with a rotational axis of a rotor of the hydraulic motor. The actuator includes a power plant mounted on the hydraulic motor via a manifold. The power plant includes an electric motor driven hydraulic pump. Operation of the electric motor causes the hydraulic pump to supply pressurized fluid to the hydraulic motor. The power plant is compactly mounted to the manifold so that a longitudinal axis of the electric motor is parallel to and spaced apart from the rotational axis of the hydraulic motor.

Abstract: A belt-driven linear module includes a tensioning assembly and a drive belt. The tensioning assembly includes a support shaft and a bearing. The support shaft is configured to be installed at a driven end of the linear module. The bearing includes an inner ring and an outer ring. The inner ring is positioned on the support shaft, and the outer ring is configured to be wrapped by the drive belt of the linear module so as to tension the drive belt of the linear module.

Abstract: A hydraulic valve comprises: a spool; and a valve body defining a valve chamber for receiving the spool, wherein the spool is adapted to linearly reciprocate within the valve chamber in an axial direction, the valve chamber at least comprises a pressure chamber and a first working chamber, between which a first valve body shoulder is provided on the valve body, and the spool has a first spool shoulder adapted to contact with or axially disengage from the first valve body shoulder in order to hydraulically isolate the pressure chamber from the first working chamber or communicate the pressure chamber with the first working chamber.

Abstract: There is provided a hydraulic circuit which can further improve a responsive characteristic in a pressure reducing operation and a reliability in the pressure reducing operation of a relief valve device, when a main circuit pressure exceeds a predetermined pressure.

Abstract: A method for controlling a variable displacement pump by calculation by a controller using a closed-center-type directional control valve, the method allowing effective utilization of the variable displacement pump while avoiding the risk of engine stall is provided. The method includes determining a first virtual discharge pressure and a second virtual discharge pressure. The method includes controlling the variable displacement pump based on a smaller value of the first virtual discharge pressure and the second virtual discharge pressure.

Abstract: A power-split transmission for a traction drive includes a hydraulic power branch and a further power branch. In order to control a velocity, a displacement volume of a hydraulic pump of the hydraulic power branch is configured to be adjusted by a hydraulic actuating device. For the purpose of adjustment, a control pressure medium can be applied to the actuating device by a control valve. An additional pressure-control device is configured to be used to set a control pressure of the control pressure medium to a setpoint value which is dependent on a drive range of the transmission or of the traction drive.

Abstract: A method for operating a redundant communication network with network participants includes the steps of determining by network participants to which network channels they are connected and using a telegram for said determining by the network participants to which network channels they are connected.

Abstract: There is provided a hydraulic circuit which can further improve a responsive characteristic in a pressure reducing operation and a reliability in the pressure reducing operation of a relief valve device, when a main circuit pressure exceeds a predetermined pressure.

Abstract: A power split transmission includes a hydraulic power branch having two hydraulic machines arranged in a hydraulic circuit, at least one of which comprises an adjustable displacement. The transmission comprises a control device for controlling the transmission ratio, and is configured to actuate at least the one adjusting device at a displacement setting. The displacement setting is adjusted in relation to a displacement setting oriented to a current demand, at least in a drive mode or drive mode section in which the displacement of one of the hydraulic machines reaches a maximum or is reduced from this maximum.

Abstract: A power-split transmission for a traction drive includes a hydraulic power branch and a further power branch. In order to control a velocity, a displacement volume of a hydraulic pump of the hydraulic power branch is configured to be adjusted by a hydraulic actuating device. For the purpose of adjustment, a control pressure medium can be applied to the actuating device by a control valve. An additional pressure-control device is configured to be used to set a control pressure of the control pressure medium to a setpoint value which is dependent on a drive range of the transmission or of the traction drive.