Abstract: The invention relates to an assembly (10) for a hydraulic brake system having a fluid container (12) for a brake fluid, an electronic control unit (14) with a first housing (16), a hydraulic block (18) with a second housing (20), and a brake pressure control device which is arranged at least in sections in the second housing (20), and a fastening device for fastening the fluid container (12) and the electronic control unit (14) to the hydraulic block (18). The second housing (20) has a first fluid connector for connecting to the fluid container (12) and a second fluid connector (24) for connecting to a hydraulic line of the brake system. The brake pressure control device is set up to pressurize the brake fluid. The fastening device has a single-piece connecting element (28) which, in the mounted state of the assembly (10), connects the second housing (20) to the first housing (16) and/or an electric motor (26) of the brake pressure control device.

Abstract: A method for expanding a compressed gas (GD) at a gas pressure (pD) with a reciprocating-piston machine, wherein the reciprocating-piston machine includes a piston that can move to and fro and a working chamber delimited by the movable piston. The method being carried out as follows: the compressed gas (GD) is supplied to the working chamber via an actuatable rotary slide valve, wherein the compressed gas (GD) in the working chamber is expanded in the working chamber.

Abstract: A reciprocating pump includes a frame for a power end, a skid support structure integrally formed at a base of the power end frame to provide proper support and rigidity for the pump power end, where the integral skid support structure has a plurality of struts forming a series of chambers.

Abstract: A hydraulic system for a rear gate of a baler implement includes a fluid circuit having a first portion connected to and disposed in fluid communication with a first fluid port of a hydraulic cylinder. A flow bypass assembly is disposed in the first portion of the fluid circuit. The flow bypass assembly includes a flow rate control valve selectively moveable between a first position allowing fluid communication therethrough at a first flow rate, and a second position blocking fluid communication therethrough. The flow bypass assembly further includes a bypass passageway for circulating the fluid when the flow rate control valve is closed. A flow restriction is disposed within the bypass passageway to provide a second flow rate that is less than the first flow rate.

Abstract: A closed-loop hydraulic circuit associated with a swing mechanism of a machine is controlled to obtain both a pressure control during acceleration and deceleration of the swing mechanism and a velocity control during coasting. In this manner, a system pressure in closed-loop hydraulic circuit is maintained below a maximum allowable pressure during acceleration and deceleration, and the swing mechanism can be rotated at a desired constant speed during coasting. This is achieved by controlling a hydraulic actuator adjusting the displacement of a variable displacement pump in different control modes, depending on a comparison between a desired displacement of the pump and an actual displacement of the same.

Abstract: An electro-hydraulic control unit for a vehicle brake system includes a hydraulic control unit including an HCU block defining a motor bore containing an electric motor and an eccentric chamber containing a rotating eccentric driven by the electric motor. The HCU block also defines a pump bore containing a piston pump including a piston rod having a generally cylindrical shape with a smooth exterior surface extending substantially its entire length. An end cap is press fit around an end of the piston rod and includes a flange portion extending annularly outwardly for engaging a return spring. A piston guide includes a tubular portion guiding the piston rod and a shoulder for engaging the return spring. A throat of the piston guide holds a gland seal surrounding the piston rod. An outlet valve housing includes a tubular protrusion extending into the throat of the piston guide to hold the gland seal.

Abstract: A pneumatic textile system capable of transforming from a two-dimensional structure to a three-dimensional structure under pneumatic pressure is provided. The pneumatic textile system includes a seamless knit fabric having a grid configuration defining a plurality of grid areas—a first of the plurality of grid areas having a tensile strength that is different from a second of the plurality of grid areas. A pneumatic bladder member is disposed along at least a portion of a boundary between adjacent ones of the plurality of grid areas and is inflatable to exert a force on the seamless knit fabric, wherein upon inflation of the pneumatic bladder member the force is exerted on the seamless knit fabric such that the first of the plurality of grid area assumes a shape different than the second of the plurality of grid areas resulting in a three-dimensional structure transformation.

Abstract: A piston includes a piston cap, a piston rod body, and a piston head, with the piston cap being removable from the piston rod body. The piston cap includes a cap body and a connecting portion extending from the cap body and away from the piston rod body. The connecting portion includes a neck and a cap head with the cap head connected to an end of the neck disposed opposite the piston rod body. The cap head is wider than the neck. A mounting portion of the piston rod body extends into a receiving portion of the cap body to connect the piston rod body to the piston cap.

Abstract: An excavator or other work machine includes a tilting bucket operated by a hydraulic actuator controlled by a bucket control valve responsive to control signals including a bucket shake control signal, which causes the bucket to move repeatedly in the rack and dump directions to shake debris from the bucket in a bucket shake operation. The actuator is powered by pressure from a hydraulic pump, and a control system includes an unloader valve to relieve pressure from the supply line to unload the pump when there is no demand for power. The control system is arranged to maintain a constant pressure signal in a load sensing line, to maintain the unloader valve constantly in a closed condition, for the duration of the bucket shake operation. This may be achieved by pressurising an actuator of a quick coupler to lock the bucket to the machine.

Abstract: The disclosure provides a hydraulic control device capable of suppressing an excessive increase in the rotation speed of a second pump and stabilizing the discharge pressure of the second pump. The target rotation speed of the second pump for making a pressure value of a first oil close to an estimated value of a pressure value of a third oil is calculated, and a feedback amount with respect to the target rotation speed is calculated by subtracting the estimated value of the pressure value of the third oil from the pressure value of the first oil detected by a hydraulic sensor. Time regions for performing calculation of the feedback amount include an update region in which the feedback amount with respect to the target rotation speed is updated, and a hold region in which update of the feedback amount with respect to the target rotation speed is temporarily stopped.

Abstract: A modular hydraulic device comprising: a housing having a receptacle having a first open end, a second end and a first port, the first port for facilitating an ingress and an egress of hydraulic fluid with respect to the housing; a sleeve configured to be received in the first open end and abut the second end; and an end cap for closing the first open end once the sleeve is inserted in the receptacle; the sleeve having: a body having a fourth lan (L4) positioned in the body for aligning with first port; a main cylinder for holding a main piston for reciprocation about a reciprocation axis; and a first bore portion fluidly coupled to the first lan, the first bore portion for receiving the ingress of the hydraulic fluid and for outputting the egress of the hydraulic fluid; wherein once assembled the main piston is coupled to a cam for facilitating said reciprocation.

Abstract: A hydraulic powering system includes a hydraulic cylinder, an accumulator, and a manifold assembly. The hydraulic cylinder includes: (i) a hydraulic cylinder construction having a hydraulic cylinder wall and first and second hydraulic cylinder end caps forming an internal volume, a piston constructed to slide within the internal volume between the first and second hydraulic cylinder end caps and dividing the internal volume into an extend region and a retract region, and a piston rod extending from the piston and through the retract region and one of the first and second end caps to outside the hydraulic cylinder; (ii) an extend port in fluid connection with the extend region of the hydraulic cylinder; and (iii) a retract port in fluid communication with the retract region of the hydraulic cylinder.

Abstract: A layered actuation structure includes one or more actuation platforms interleaved with one or more mounting platforms to form one or more actuation cavities between platform pairs, each platform pair having an individual mounting platform and an individual actuation platform. The layered actuation structure also includes a support arm coupled to the one or more mounting platforms, an actuation arm coupled to the one or more actuation platforms, and one or more artificial muscles disposed in each of the one or more actuation cavities. The one or more artificial muscles each include an electrode pair that is actuatable between a non-actuated state and an actuated state to direct a dielectric fluid into an expandable fluid region of a housing of the artificial muscle, expanding the expandable fluid region thereby applying pressure to the one or more actuation platforms, generating translational motion of the one or more actuation platforms.

Abstract: Artificial muscles are provided including a housing having an electrode region and an expandable fluid region, an electrode pair including a first electrode and a second electrode positioned in the electrode region of the housing, a dielectric fluid housed within the housing, and a stiffening member positioned between the housing and at least one of the first electrode and the second electrode. The stiffening member increases a stiffness of the housing in a direction toward the expandable fluid region from an opposite edge of the electrode region. The electrode pair is actuatable between a non-actuated state and an actuated state such that actuation from the non-actuated state to the actuated state directs the dielectric fluid into the expandable fluid region.

Abstract: The present invention provides a seal housing (102) for releasable attachment to a hydraulic or pneumatic cylinder (101), the seal housing (102) being suitable for retaining a seal assembly and the seal housing (102) comprising a generally annular main body (201). The annular main body (201) defines an annular disc-shaped portion (202) having an upper surface (203), a lower surface (204), an outer peripheral edge (205) and an inner edge (206). Said inner edge (206) bounds a circular opening (207) extending the full height of said annular disc shaped portion (202) between said upper and lower surfaces (203, 204).

Abstract: Hydraulically-amplified, self-healing, electrostatic transducers that harness electrostatic and hydraulic forces to achieve various actuation modes. Electrostatic forces between electrode pairs of the transducers generated upon application of a voltage to the electrode pairs draws the electrodes in each pair towards each other to displace a liquid dielectric contained within an enclosed internal cavity of the transducers to drive actuation in various manners. The electrodes and the liquid dielectric form a self-healing capacitor whereby the liquid dielectric automatically fills breaches in the liquid dielectric resulting from dielectric breakdown. Due to the resting shape of the cavity, a zipping-mechanism allows for selectively actuating the electrodes to a desired extent by controlling the voltage supplied.

Abstract: A hydraulic system for a vehicle includes a hydraulic monitoring control unit configured to receive an operational signal from a sub-system of the vehicle and control flow of hydraulic fluid to actuators of components based on the operational signal. The hydraulic monitoring control unit is configured to bypass the flow of the hydraulic fluid in relation to a subset of the actuators in response to the operational signal indicating an altered operational state of the sub-system.

Abstract: A hydraulic system includes: a cylinder in which an interior of a tube is divided by a piston into a first pressure chamber and a second pressure chamber; a first bidirectional pump connected to the first pressure chamber by a first supply/discharge line; a second bidirectional pump connected to the second pressure chamber by a second supply/discharge line and coupled to the first bidirectional pump in a manner enabling torque to be transmitted between the first and second bidirectional pumps; a relay line connecting the first and second bidirectional pumps such that a hydraulic liquid discharged from one of the first and second bidirectional pumps is introduced into the other of the first and second bidirectional pumps; and an electric motor that drives the first or second bidirectional pump. At least one of the first and second bidirectional pumps is a variable displacement pump whose delivery capacity per rotation is freely variable.

Abstract: An actuator assembly comprises a housing having a piston at least partially disposed therein. The actuator assembly includes at least one biasing mechanism disposed within the housing to selectively position the piston between a first position, a second position, and a third position located between the first and second positions.

Abstract: A hydraulic actuator can be provided for actuating a functional part by a movement of a force transmission element, with a working piston which can be acted upon by a hydraulic pressure of a pressure supply and is movable thereover between a first extreme position and a second extreme position in a piston/cylinder unit, wherein two chambers separated from one another by the working piston are present and a first chamber is formed as a first working chamber with a pressure inlet and a hydraulic pressure applied to the first pressure inlet urges the working piston in the direction of the first extreme position in order to enlarge the first working chamber. At least one retaining means is provided which is capable of automatically locking the working piston in one of the extreme positions when this extreme position is reached, even without any hydraulic pressure being applied.