Abstract: Provided is a cylinder device capable of preventing rotation unevenness while reducing power consumption and achieving compactification in particular. The present invention is to provide a cylinder device including a cylinder body and a shaft member supported in the cylinder body, the cylinder body is provided with a rotation mechanism portion including a rotation chamber and configured to rotate the shaft member based on an action of a fluid, and rotation ports communicating with the rotation chamber are provided at a front end and a rear end of the rotation mechanism portion. Thus, it is possible to prevent rotation unevenness while reducing power consumption and achieving compactification.

Abstract: A hydraulic control block for controlling a supply of pressurizing medium to an electrohydraulic or servo hydraulic axle includes a plurality of internally situated hydraulic interfaces configured to fluidically connect at least one of a source of pressurizing medium and a pressurizing medium sink of the axle to any hydraulic cylinder selected from a group of hydraulic cylinders of different structural forms, wherein the internally situated hydraulic interfaces are configured to selectively supply pressurizing medium to the selected hydraulic cylinder. The control block further includes an insert part configured as a function of the structural form of the selected hydraulic cylinder such that each of the plurality of internally situated hydraulic interfaces is one of tapped and blocked for the purpose of the fluidic connection.

Abstract: A vehicle includes a heat exchanger, a transmission, and a controller. The transmission is configured to transfer power within a powertrain. The transmission has a primary fluid circuit, a secondary fluid circuit, and a valve. The secondary fluid circuit is configured to divert the fluid from the primary fluid circuit and deliver the fluid to the heat exchanger. The valve is configured to control diverting fluid from the primary fluid circuit to the secondary fluid circuit. The controller is programmed to, in response to a temperature of the fluid being outside of a desired range, open the valve to direct the fluid toward the heat exchanger via the secondary fluid circuit. The controller is further programmed to, in response to the temperature of the fluid being within the desired range, close the valve to isolate the fluid from the secondary fluid circuit and the heat exchanger.

Abstract: A seal assembly for an aircraft engine includes a first seal having an upstream end exposed to a first pressure area, and a downstream end exposed to a second pressure area, the first seal at least partially defining an intermediate pressure area and a chamber being fluidly connected to the second pressure area and to the intermediate pressure area through passages defined in the first seal, the chamber allowing for a mixing of a first portion of a stream of air with air from the second pressure area, and a second seal connected to the first seal, the second seal biasing the first portion of the stream of air toward the passages, and allowing a second portion of the stream of air from flowing therethrough toward the second pressure area. A method of flowing air through an aircraft seal assembly is also described.

Abstract: A method of removing hydraulic fluid from an aircraft hydraulic system is disclosed including a hydraulically actuated mechanism that is actuated by an electrohydraulic servo valve, a hydraulic fluid port through which hydraulic fluid can escape, and a hydraulic fuse with a closed state and an open state between the electrohydraulic servo valve and the hydraulic fluid port. The hydraulic fluid port is opened, and then the activation of the electrohydraulic servo valve is controlled to force hydraulic fluid to escape from the hydraulic system via the hydraulic fluid port, the control being so that the hydraulic fuse does not enter and remain in the closed state.

Abstract: An agricultural system that includes a cylinder and a rod that moves axially in and out of the cylinder to raise and lower a header. A cylinder lock system controls movement of the rod. The cylinder lock system includes a cap-end fixture that couples to the cylinder and receives the rod. A rod-end fixture couples to an end of the rod. The system includes a lock piston. The lock piston includes a protrusion. The lock piston rotates about the rod and selectively couples the protrusion to the cap-end fixture to lock and unlock the rod-end fixture to the cap-end fixture.

Abstract: There is provided a control module for a hydraulic system. The module comprises a tank and a plurality of valves. The tank is configured to store hydraulic fluid and is substantially cylindrical. The plurality of valves fluidly connect with the tank and are configured to control distribution of hydraulic fluid from the tank to one or more components of the system. The plurality of valves are spaced around a circumference of the tank. One or more passages fluidly connect the tank with at least one of the plurality of valves and/or a first of the plurality of valves with a second of the plurality of valves.

Abstract: A piston for a heavy duty diesel engine including a composite layer forming at least a portion of a combustion surface is provided. The composite layer has a thickness greater than 500 microns and includes a mixture of components typically used to form brake pads, such as a thermoset resin, an insulating component, strengthening fibers, and an impact toughening additive. According to one example, the thermoset resin is a phenolic resin, the insulating component is a ceramic, the strengthening fibers are graphite, and the impact toughening additive is an aramid pulp of fibrillated chopped synthetic fibers. The composite layer also has a thermal conductivity of 0.8 to 5 W/m·K. The body portion of the piston can include an undercut scroll thread to improve mechanical locking of the composite layer. The piston can also include a ceramic insert between the body portion and the composite layer.

Abstract: The invention relates to a modular construction system for a piston machine (100), comprising at least two separate housing parts capable of being joined together into a housing (1) of the piston machine (100), a piston (15) which is configured as a swivel element, is pivotable and is able to be arranged in the housing (1), and a housing cover (7) for covering the housing (1). The piston machine (100) is in particular configured as a modular construction system, the components of which are formed by multiple segments and joined together in a horizontal and a vertical direction in each case. The invention further relates to a piston machine (100) produced using the modular construction system and to a method for producing a piston machine (100).

Abstract: Hydraulic actuator systems of aircraft are described. The hydraulic actuator systems include a hydraulic actuator having a housing and piston therein. The piston includes a piston head separating the housing into a retract cavity and an extend cavity. An actuator controller is hydraulically coupled to the retract cavity by a first hydraulic line and hydraulically coupled to the extend cavity by a second hydraulic line and configured to control a hydraulic pressure within each of the retract cavity and the extend cavity to control actuation of the hydraulic actuator. A position-lock controller is arranged along at least one of the first hydraulic line and the second hydraulic line, the position-lock controller is configured to hydraulically decouple the actuator controller from at least one of the retract cavity and the extend cavity.

Abstract: A fluid end, includes a plunger reciprocating within a first bore, the plunger increasing a pressure of a fluid within a pressure chamber. The fluid end also includes a second bore. The fluid end further includes a plug assembly associated with the second bore. The plug assembly includes a plug body positioned within the second bore. The plug assembly also includes a lock ring positioned, at least in part, within the second bore, the lock ring positioned to be driven radially outward responsive to a longitudinal force applied to the plug body.

Abstract: A piston with an oil return channel may include a piston head, a piston skirt, and an oil return hole. The piston head may include a ring groove. The piston skirt may be connected to the piston head. The piston skirt may have a surface including a concave face window. A connection between the face window and the ring groove may form a residual ring bank. The oil return hole may be formed by milling on the residual ring bank. The oil return hole may connect the ring groove close to the piston skirt with the face window. A depth of the oil return hole may be greater than a depth of the ring groove.

Abstract: A hydraulic system for a working vehicle includes a first hydraulic pump to deliver pilot fluid to a control valve for a hydraulic actuator whose highest load pressure acts on a first fluid passage, and a second hydraulic pump to deliver hydraulic fluid whose pressure acts on a second fluid passage. A hydraulic controller is operable to control a load-sensing (LS) differential pressure between the highest load pressure and a delivery pressure of the hydraulic fluid from the second hydraulic pump. A third fluid passage to which the second hydraulic pump delivers the hydraulic fluid branches to a fourth fluid passage for flow of the pilot fluid. A solenoid valve is operable to change a pilot pressure of the pilot fluid for the hydraulic controller, and a controller is configured or programmed to control the solenoid valve to adjust the pilot pressure to change the LS differential pressure.

Abstract: An artificial muscle includes an electrode pair including a first electrode and a second electrode. One or both of the first electrode and the second electrode includes a central opening. The first electrode and the second electrode each include two or more fan portions and two or more bridge portions. Each fan portion includes a first end having an inner length, a second end having an outer length, a first side edge extending from the second end, and a second side edge extending from the second end. The outer length is greater than the inner length. Each bridge portion interconnecting adjacent fan portions at the first end.

Abstract: An electromechanically drivable brake pressure generator for a hydraulic braking system of a vehicle, including an electric motor unit, which is activatable with the aid of an electronic control unit in accordance with a brake pressure to be applied and whose rotary motion generated thereby is converted by a reducing gearbox unit including an output-side spindle drive unit into a translatory motion for actuating a piston of a hydraulic piston/cylinder unit. A hydraulic block of the piston/cylinder unit also at least partially accommodates the electric motor unit in such a way that a motor shaft of the electric motor unit extending at least predominantly in the area of the hydraulic block is situated axially parallel to a longitudinal axis of the piston of the piston/cylinder unit which is movable in the hydraulic block.

Abstract: An automatic venturi vacuum regulator includes a housing having a pressure inlet port and a vacuum outlet port; a venturi vacuum pump within the housing, the venturi vacuum pump configured to receive compressed air from the pressure inlet port in order to generate suction at the vacuum outlet port; a movable piston configured to seal the pressure inlet port from the venturi vacuum pump responsive to a sufficient pressure differential between the vacuum outlet port and the pressure inlet port; and a check valve configured to seal the vacuum outlet port from the venturi vacuum pump to resist loss of vacuum at the vacuum outlet port.

Abstract: An object of the present disclosure is to provide an actuator having even better durability than the conventional actuator. Specifically, an actuator has an actuator main body constituted of a cylindrical tube capable of expanding/contracting by hydraulic pressure and a sleeve for covering an outer peripheral surface of the tube, the sleeve having a cylindrical structure formed by cords woven to be disposed in predetermined directions, wherein: the inner diameter r0 (mm) of the tube, the thickness t (mm) of the tube, the storage elastic modulus E? (MPa) of the tube at 25° C., and the mesh aperture ratio A of the cords constituting the sleeve in a pressurized state satisfy the following formula (1): 50?E?×(t/r0)/A?600??(1).

Abstract: A piston for a fluid-actuated working cylinder, with a piston base unit which is coaxial to a piston longitudinal axis, consisting of a rigid core body which has radial outer peripheral surface and of an annular filling body which is seated in an annular receiving groove. The receiving groove is coaxial to the piston longitudinal axis and in the region of the radial outer peripheral surface is designed with a radially outwardly facing groove opening in the core body. The piston further includes a ring element which consists of plastic. The ring element radially outwardly coaxially encompasses the piston base unit at least in the region of the filling body, being radially supported with a radial inner peripheral surface on the piston base unit, projecting radially beyond the radial outer peripheral surface of the core body and comprising an axially orientated axial support surface radially outside the piston base unit on its two axial face sides.

Abstract: The present disclosure relates to a hydraulic power pack arrangement that can be configured in multiple different mounting configurations. The hydraulic power pack arrangement can include a bracket assembly for mounting a hydraulic power pack core assembly and a hydraulic reservoir assembly at a mounting location such as a floor, wall, or ceiling of an aircraft.

Abstract: An electro-hydraulic actuator includes: a motor output rotative power; an external gear pump activated by the motor; a hydraulic actuator operated by a pressurized working fluid supplied by the external gear pump; a manifold block in which a flow channel forming a working fluid circuit of the hydraulic actuator is incorporated; a first portion to store the motor; a second portion to store the external gear pump, the hydraulic actuator, and a reservoir; and a coupling portion to couple the first portion and the second portion in a liquid-tight state. The coupling portion includes a communication hole through which the first portion and the second portion communicate, a rotational shaft of the motor and a driving shaft of the external gear pump are joined to each other, and the external gear pump is attached to the coupling portion while being stored in the manifold block.