Abstract: A linear actuator includes a hermetically sealed housing, a cantilever that can be retracted into and extended out of the housing, and several components provided in the linear actuator. The components are configured so as to facilitate a flow of lubricating oil through the linear actuator, in particular when the cantilever is rapidly retracted and extended. This is achieved in that through-holes are provided in some components, through which lubricating oil and gas that has been filled into the housing can flow upon retraction and extension.

Abstract: An electromechanical linear actuator includes a threaded drive which has a threaded spindle and a threaded nut. The threaded spindle is coupled to a hollow shaft of an electric motor via a rotationally fixed connection. The threaded nut is fastened to a linearly movable extension tube. In a maximally retracted state of the extension tube, the threaded nut is retracted at least in portions, preferably completely, into the interior of the hollow shaft. During operation of the linear actuator, the threaded spindle rotates and is not moved linearly. The threaded nut does not rotate and is moved linearly.

Abstract: A linear actuator includes a hermetically sealed housing, a cantilever that can be retracted into and extended out of the housing, and several components provided in the linear actuator. The components are configured so as to facilitate a flow of lubricating oil through the linear actuator, in particular when the cantilever is rapidly retracted and extended. This is achieved in that through-holes are provided in some components, through which lubricating oil and gas that has been filled into the housing can flow upon retraction and extension.

Abstract: An electromechanical linear actuator includes, among other things, a sliding piston with helical grooves for a floating bearing of a spindle in an electromechanical actuator. With relative movement of the spindle with respect to the sliding piston, a lubrication fluid passing through the grooves between the sliding piston and the spindle may assist in hydrodynamic lubrication between these two parts.

Abstract: An actuator includes a housing, an extension arm, and a threaded spindle. The threaded spindle is rotatably supported on the housing with respect to the center axis of the threaded spindle. The extension arm projects slidably out of the housing in the direction of the center axis. The housing and the extension arm together surround an interior space, whose volume changes as the extension arm moves. One end of the threaded spindle projects into a tubular portion of the extension arm, regardless of the position where the extension arm is located. The tubular portion extends about the central axis with a constant internal cross-sectional shape. The end of the threaded spindle is connected to a piston, which divides the internal space into a first region and a second region such that the first and second regions are separated from each other in a fluid-tight manner. The first region is only delimited by the piston and the extension arm. The second region is sealed against the environment in a fluid-tight manner.

Abstract: A linear actuator having a threaded drive including a nut connected to a cantilever tube and a leadscrew coupled to a motor, so that, by rotation of the leadscrew, the threaded nut and the cantilever tube are linearly movable, and, regardless of the position of the cantilever tube, one end the leadscrew projects into the cantilever tube and is connected to a piston which divides an internal space formed by the cantilever tube into a first region on the side of the piston opposite the threaded nut and a second region on the side of the piston facing the nut. The two regions are separated from one another in a fluidically sealed manner. A relief of the threaded drive is improved since the first region is connected to a pressure accumulator to generate a relief pressure in the first region using the first pressure source.

Abstract: A linear actuator has a screw drive having a threaded nut connected to an extension arm tube and a threaded spindle couplable to a motor. A first end of the spindle always projects into the tube and is connected to a piston which partitions an interior space formed by the tube into a first region on the side of the piston opposite to the nut and a second region on the side of the piston facing the nut. The regions are separated in a fluid-tight manner. The spindle is held in position since the nut comprises an annular piston that delimits an annular fluid space between a housing of the linear actuator and the tube in a fluid-tight manner, the hydraulically effective surface of which is the same size as that of the first region. The first region and the annular fluid space are fluidically connected by a switching valve.

Abstract: An electromechanical linear actuator having a threaded drive, which comprises a threaded nut connected to a cantilever tube and a lead screw connected to a hollow shaft of an electric motor via a rotationally fixed connection in such a way that, by a rotation of the hollow shaft and the lead screw, the threaded nut and the cantilever tube are linearly movable. An axial design length of the electromechanical linear actuator in the maximally retracted state is minimized in that a holding brake for the lead screw and a first rotary bearing for bearing the lead screw on a housing of the linear actuator are arranged within the hollow shaft.

Abstract: An electromechanical linear actuator having a threaded drive, which comprises a threaded nut connected to a cantilever tube and a lead screw connected to a hollow shaft of an electric motor via a rotationally fixed connection in such a way that, by a rotation of the hollow shaft and the lead screw, the threaded nut and the cantilever tube are linearly movable. An axial design length of the electromechanical linear actuator in the maximally retracted state is minimized in that a holding brake for the lead screw and a first rotary bearing for bearing the lead screw on a housing of the linear actuator are arranged within the hollow shaft.

Abstract: A linear actuator having a threaded drive including a nut connected to a cantilever tube and a leadscrew coupled to a motor, so that, by rotation of the leadscrew, the threaded nut and the cantilever tube are linearly movable, and, regardless of the position of the cantilever tube, one end the leadscrew projects into the cantilever tube and is connected to a piston which divides an internal space formed by the cantilever tube into a first region on the side of the piston opposite the threaded nut and a second region on the side of the piston facing the nut. The two regions are separated from one another in a fluidically sealed manner. A relief of the threaded drive is improved since the first region is connected to a pressure accumulator to generate a relief pressure in the first region using the first pressure source.

Abstract: A linear actuator has a screw drive having a threaded nut connected to an extension arm tube and a threaded spindle couplable to a motor. A first end of the spindle always projects into the tube and is connected to a piston which partitions an interior space formed by the tube into a first region on the side of the piston opposite to the nut and a second region on the side of the piston facing the nut. The regions are separated in a fluid-tight manner. The spindle is held in position since the nut comprises an annular piston that delimits an annular fluid space between a housing of the linear actuator and the tube in a fluid-tight manner, the hydraulically effective surface of which is the same size as that of the first region. The first region and the annular fluid space are fluidically connected by a switching valve.

Abstract: An electromechanical linear actuator includes a threaded drive which has a threaded spindle and a threaded nut. The threaded spindle is coupled to a hollow shaft of an electric motor via a rotationally fixed connection. The threaded nut is fastened to a linearly movable extension tube. In a maximally retracted state of the extension tube, the threaded nut is retracted at least in portions, preferably completely, into the interior of the hollow shaft. During operation of the linear actuator, the threaded spindle rotates and is not moved linearly. The threaded nut does not rotate and is moved linearly.

Abstract: A servohydraulic drive includes a hydrostatic displacement machine, an electric machine that is mechanically speed-coupled with the displacement machine, a hydraulic cylinder that is fluidically connected to the displacement machine via first and second working lines, a hydraulic accumulator, and a supply unit. The displacement machine has a stroke that is adjustable via a hydraulic adjustment device. The cylinder is configured to be activated by reversal of the fluid flow through the displacement machine in opposite directions. The accumulator is preset to a low pressure and is fluidically connected via a valve assembly in each case to the lower pressure working line. The supply unit is configured to supply the adjustment device with pressurized fluid under the necessary pressure for the adjustment regardless of the present pressure in the working lines such that the displacement machine is configured for an active and load pressure-independent adjustment of its stroke volume.

Abstract: A servohydraulic drive includes a hydrostatic displacement machine, an electric machine that is mechanically speed-coupled with the displacement machine, a hydraulic cylinder that is fluidically connected to the displacement machine via first and second working lines, a hydraulic accumulator, and a supply unit. The displacement machine has a stroke that is adjustable via a hydraulic adjustment device. The cylinder is configured to be activated by reversal of the fluid flow through the displacement machine in opposite directions. The accumulator is preset to a low pressure and is fluidically connected via a valve assembly in each case to the lower pressure working line. The supply unit is configured to supply the adjustment device with pressurized fluid under the necessary pressure for the adjustment regardless of the present pressure in the working lines such that the displacement machine is configured for an active and load pressure-independent adjustment of its stroke volume.

Abstract: Online advertisements are delivered to one or more users. An authorization to access one or more data streams for a given user is received. The authorization is explicitly granted by the user. The data streams are stored within a user data repository. Upon the user conducting an online action that initiates a dynamic advertisement (DA) request, the authorized data streams for the user are used to generate a customized DA that is optimally relevant to the user. The customized DA is then delivered to the user. The customized DA is also monetized.

Abstract: Online advertisements are delivered to one or more users. An authorization to access one or more data streams for a given user is received. The authorization is explicitly granted by the user. The data streams are stored within a user data repository. Upon the user conducting an online action that initiates a dynamic advertisement (DA) request, the authorized data streams for the user are used to generate a customized DA that is optimally relevant to the user. The customized DA is then delivered to the user. The customized DA is also monetized.

Abstract: A method for estimation of component gating risk in manufacturing operations is disclosed. The method includes generating an altered component plan by altering a component plan for a component, computing a mean production value using the altered component plan, and computing the component gating risk using the mean production value.

Abstract: A method for forecasting the component surpluses for a target planning period is provided. To begin this method, a planner first identifies each component required to produce a product. For each component, the planner defines a planned level and an uncancelable level. The planned level for a component is the quantity at which the component is expected to be available. The uncancelable level for a component is the quantity of the component that cannot be liquidated without charge. The planner also defines a vector of connect rates for the components. After the required data has been entered, an expected surplus is computed for each component. To compute a component's expected surplus, the component is assumed to be available at its uncancelable level. The remainder of the components are assumed to be available at their respective planned levels.

Abstract: A method for forecasting the component surpluses for a target planning period is provided. To begin this method, a planner first identifies each component required to produce a product. For each component, the planner defines a planned level and an uncancelable level. The planned level for a component is the quantity at which the component is expected to be available. The uncancelable level for a component is the quantity of the component that cannot be liquidated without charge. The planner also defines a vector of connect rates for the components. After the required data has been entered, an expected surplus is computed for each component. To compute a component's expected surplus, the component is assumed to be available at its uncancelable level. The remainder of the components are assumed to be available at their respective planned levels.

Abstract: A representative implementation of a method begins when a planner captures assumptions about products and components in an entity called a “scenario.” A scenario is the parameterization of all the demand, financial, and operational information for a portfolio of products and components across a set of time buckets (planning periods). The planner then specifies a component plan to be analyzed, which identifies the quantities of each resource that will be used or procured during each planning period. A request for analysis includes one or more analysis parameters that will be used in order to evaluate the performance and the risks associated with the component plan and scenario. The request for analysis is submitted to an analysis engine for calculation of risk indicators. The analytical engine calculates all the performance indicators and returns the results. The results are then typically stored in a database or other persistent storage system.