Abstract: An integrated pump device forms a module in which a motor, an oil pump rotated by a driving force of the motor, and a hydraulic parking lock actuator are integrally constructed. The hydraulic parking lock actuator operates to switch between an advance state and a retard state by hydraulic pressure supplied from the oil pump, and locks a parking lock mechanism of an automobile in the advance state and unlocks the parking lock mechanism in the retard state. The oil pump can supply oil for cooling or lubrication to an oil consumer via the hydraulic parking lock actuator.

Abstract: Pneumatic soft actuators, and methods and machines capable of modifying their performance and mechanical characteristics. Such a pneumatic soft actuator can be used to connect mechanical components and include an inflatable pouch formed by an airtight, flexible, non-stretchable membrane. The inflatable pouch has oppositely-disposed ends adapted to couple to the mechanical components, and has two lateral edges in which symmetrical folds are formed and define end geometries at the ends of the inflatable pouch. Inflation and deflation of the inflatable pouch increases and decreases, respectively, a distance between the ends of the inflatable pouch to induce relative motion between the mechanical components coupled to the ends of the inflatable pouch.

Abstract: A piston assembly includes a piston head. The piston assembly further includes an upper connecting rod rotatably coupled to the piston head. The piston assembly also includes a shoe positioned between the upper connecting rod and an inner wall of the piston head.

Abstract: The control valve includes a valve body; a spool hole formed in the valve body; a spool slidably fitted in the spool hole; a pilot chamber into which a pilot fluid to actuate the spool is led; a discharge passage to discharge a hydraulic fluid to an outside of the valve body; a spiral groove to communicate with the discharge passage, the spiral groove being formed in a spiral shape on an outer periphery of the spool; and at least one axial groove to cause the pilot chamber and the spiral groove to communicate with each other, the axial groove being formed along an axial direction of the spool on an inner surface of the spool hole.

Abstract: A coupler for a reciprocating pump includes comprising two collar elements. Each collar element includes a semi annular body, an exterior channel extending on the exterior surface of the semi-annular body, and an interior channel extending along the interior surface of the semi-annular body, the interior channel having a depth and width to accommodate both an end of a liquid pump rod and an end of a reciprocating drive.

Abstract: A safety system for a machine includes a pressurizing device; at least one hydraulic cylinder, the at least one hydraulic cylinder including a pressure chamber and a piston having a head and a rod, the piston being movable within the pressure chamber along a longitudinal direction; a first pressure sensor and a second pressure sensor being designed to measure the pressure within the pressure chamber via a first channel having a first opening and a second channel having a second opening, which both extend into the pressure chamber, and are spaced apart as seen in the longitudinal direction; a seal device arranged circumferentially around the head of the piston, and a hydraulic system being fluidically connected to a head side and a rod side of the at least one hydraulic cylinder, the hydraulic system being fluidically connected to a hydraulic fluid reservoir and the pressurizing device.

Abstract: A variable impedance actuator is provided with a bladder-style actuator having a first end and a second end, and a jamming brake located inside the bladder-style actuator and connected to the first end and the second end of the bladder-style actuator. The bladder-style actuator and the jamming brake are independently controlled.

Abstract: A stability and control augmentation system (SCAS) actuator is operable for actuating a flight control surface of an aircraft. The SCAS actuator includes an actuator housing having a first aperture, a second aperture and a hydraulic chamber therebetween. A piston extends through the actuator housing. Fluid inlets are in fluid communication with regions of the hydraulic chamber. A first end portion of the piston is arranged to slide through the first aperture without a seal between the first end portion and the first aperture. A second end portion of the piston is arranged to slide through the second aperture without a seal between the second end portion and the second aperture. An intermediate portion of the piston is arranged to slide in the hydraulic chamber without a seal between the intermediate portion and the hydraulic chamber.

Abstract: A housing for a hydraulic unit, in particular a master brake cylinder for a hydraulic motor vehicle brake system, has at least a first and a second separate formed elements which are arranged on at least one side of the housing for a spatially clearly defined mounting of the housing and introduction of clamping forces into an external holding device.

Abstract: In accordance with one aspect of the present disclosure, a reservoir tank for a brake system can be provided, and the reservoir tank includes an upper body provided with an oil injector through which oil is injected, a lower body provided with a port through which oil is supplied to a master cylinder and coupled to the upper body to form an oil space, and a partition provided in the oil space to prevent the oil from being gathered at one side, wherein the partition includes a plurality of first partitions formed vertically and a second partition provided between the plurality of first partitions and provided with a communication space formed therein to communicate with the port.

Abstract: A method for actuating a fluid actuator in a motor vehicle seat system having a motor vehicle seat and a pneumatic system for actuating a seat function. The pneumatic system has a pump and the fluid actuator housed in the motor vehicle seat. The pump motor is an electric motor controlled by a PWM signal and is set up to fill the fluid actuator with fluid within a filling phase. The pneumatic system is set up to withdraw fluid from a fluid actuator filled with fluid, in an emptying phase. The fluid actuator runs through a plurality of filling phases and emptying phases in succession. The duty cycle of the PWM signal is set to a working level during a filling phase and is lowered to a lower level between filling phases. The lower level is dimensioned such that the rotor of the pump motor can still rotate.

Abstract: The present invention relates to an inflatable, moveable structure comprising: a fluid source; at least one chamber comprising a substantially inelastic outer membrane defining a cavity extending therebetween, in which the or each cavity is in fluid communication with the fluid source, and in which the or each chamber further comprises at least one first valve located on and extending through the outer membrane thereof; and a control system.

Abstract: A mobile machine such as a tractor has an engine and hydraulic supply system including a pump supply with a pump (MP) driven by the engine to provide a pressurized fluid at a pump supply pressure PSP. The hydraulic supply system has an electronic load sensing system (E-LS) to regulate the pump supply pressure. The E-LS is arranged to increase a stand-by pressure differential of the pump supply once the engine is determined to be running following start-up. This enables the hydraulic supply system to be configured with a reduced hydro-mechanically defined stand-by pressure differential so that it places a reduced load on the engine when it is started. The E-LS may be arranged to inhibit LS control of the pump supply when the engine is started, with LS functionality only commenced once the engine is running. Reduced load on the engine during start-up can improve cold starting.

Abstract: A double quad valve design and associated use and system is presented that provides a user to control directional, bidirectional and in some cases tri-directional balanced flow into and out of three (or more) ports that together with one or more sets of springs and sliding seats ensures an ability to allow for a completely static condition that is absent any fluid or fluid flow leaks as well as completely balanced flow that eliminates hydraulic seizure during the operation of one or more mechanical, hydraulic, electro-mechanical, and/or electro-hydraulic devices.

Abstract: A system for oil leak mitigation in hydraulic systems. The systems and methods prevent or mitigate oil leakage from hydraulic components. In one embodiment, a flexible bellows is provided positioned over a hydraulic rod to collect leaking oil. The bellows is connected to the hydraulic actuator by means of at least one magnet, in one embodiment. In another embodiment, a sleeve is connected to the actuator to collect oil droplets. The sleeve is connected to the actuator by means of a 4-bolt flange (in some embodiments).

Abstract: A soft structure fiber reinforcement and actuation technology is provided. In an example embodiment, the tendon-driven, fiber-reinforced elastomer membrane comprises an elastomer matrix material and a fiber array embedded within the elastomer matrix material. The one or more tendons are not mechanically bonded to the elastomer matrix material, such that the one or more embedded tendons are able to move through the elastomer matrix material. One or more apparatuses may employ one or more such tendon-driven, fiber-reinforced elastomer membranes for use in a variety of applications.

Abstract: A hydraulic drive valve monitoring device includes a determination part and an alarm part. The determination part is configured to determine whether there is a sign of failure in the hydraulic drive valve device based on a result of comparison between a transition of a working fluid pressure measurement value obtained by measuring a pressure of the working fluid flowing into the valve body part and a transition of a working fluid pressure reference value set for the pressure of the working fluid flowing into the valve body part, when the opening degree of the valve body part is changed. The alarm part is configured to output an alarm when the determination part determines that there is a sign of failure in the hydraulic drive valve device.

Abstract: A rotary actuator includes an actuator body having a first end and a second end defining an interior of the actuator body therebetween, an axis X of the body being between the first and second ends. Each end is provided with a port arranged to receive hydraulic fluid. The actuator also includes: mounting parts extending from the ends into the interior of the actuator body a screw mounted to the mounting parts within the actuator body between the first and second ends, the screw mounted to the mounting parts via splines to allow linear axial translation of the screw relative to the mounting parts. The screw having one or two walls extending across an inner diameter d of the screw.

Abstract: An electrohydraulic system for a work machine includes a pump, a motor fluidly coupled to the pump, a subassembly driven by the motor, and a rate-control valve fluidly coupled to the pump and the motor. The rate-control valve is movable through a range of positions. A present speed of the motor is proportional to a present position of the rate-control valve. The present position of the rate-control valve is adjustable by varying a current supplied to the rate-control valve. The supply of current to the rate-control valve is adjusted based on the difference between the present speed of the motor and a target speed of the motor.

Abstract: A hydraulic cylinder includes a cylinder tube, a piston rod that has a rod end portion disposed inside the cylinder tube and moves in an axial direction, a first rod passage that is formed inside the piston rod and connects a hydraulic source and a first opening formed in the rod end portion, a plug that is inserted into the first rod passage through the first opening, and a piston that is fixed to the piston rod in a state of covering at least a part of the plug and partitions an inside of the cylinder tube into a bottom chamber on one side in the axial direction and a head chamber on the other side in the axial direction.