Abstract: A pressure regulator for an x-ray apparatus includes a piston housing having a recess formed therein and a piston seated in the recess. The piston is free to reciprocate, and define a variable volume chamber, within the recess. A circumferential groove is formed in an exterior surface of the piston, and a seal is seated in the circumferential groove. A manifold in the piston housing places the chamber in fluid communication with an exterior of the piston housing.

Abstract: A hydraulic system (600) and method for reducing boom dynamics of a boom (30), while providing counter-balance valve protection, includes a hydraulic actuator (110), first and second counter-balance valves (300, 400), first and second control valves (700, 800), and first and second blocking valves (350, 450). A net load (90) is supported by a first chamber (116, 118) of the hydraulic actuator, and a second chamber (118, 116) of the hydraulic actuator may receive fluctuating hydraulic fluid flow from the second control valve to produce a vibratory response (950) that counters environmental vibrations (960) on the boom. The first blocking valve prevents the fluctuating hydraulic fluid flow from opening the first counter-balance valve. The first blocking valve may drain leakage from the first counter-balance valve.

Abstract: Master cylinder assemblies, particularly for operation of the brake or clutch of motorcycles or other ATVs, are susceptible to a reduction in pressure due to the introduction of unwanted gases within the hydraulic lines. As a result, the brake or clutch system may not operate as designed. The present disclosure describes master cylinder assemblies that include one or more fluid separators, with a separator at least at the compensating port of the fluid reservoir to inhibit or prevent air or other gases from entering the piston channel through the compensating or inlet ports.

Abstract: The present disclosure relates to a control method of a brake system including a reservoir in which oil is stored, wherein the control method includes detecting a first level of a liquid level of oil stored in the reservoir, detecting a second level of the liquid level of oil stored in the reservoir, determining a decrease trend of an oil amount stored in the reservoir based on a time point when the first level is detected and a time point when the second level is detected, and limiting at least one additional function based on the decrease trend of the oil amount.

Abstract: A device for amplifying a force includes a prime mover configured to receive a first force, and a secondary mover configured to generate a second force that is greater than the first force in response to the prime mover receiving the first force. The prime mover includes an output that, in response to the first force, rotates about a first axis through a power stroke defined by an angular displacement that is less than ninety degrees. The prime mover's output includes a first end that revolves about the first axis during the power stroke. The secondary mover includes an input, an output, and a body. The input includes a second end that is coupled with the first end of the prime mover's output, and that, as the first end of the prime mover's output revolves about the first axis through the power stroke, the second end of the secondary mover's input also revolves about the first axis and moves relative to the secondary mover's body.

Abstract: A sealing element for sealing a pressure chamber is provided in a master cylinder for a clutch or brake system. The sealing element has a sealing lip for sealing a feed of hydraulic fluid from a reservoir mounted on a housing of the master cylinder into the pressure chamber and has a sealing structure for sealing the pressure chamber from the surroundings of the pressure chamber.

Abstract: Combination linear and rotary actuators are disclosed. The linear and rotary actuators have a housing defining a cylindrical interior space and a pair of pistons located inside the cylindrical interior space. An inner bearing cylinder is provided that has spaced-apart ball bearings arranged in a helical pattern on its surface that engage with a structure having an inner surface with helical grooves therein. The structure at least indirectly engages a linear drive piston that is slidably mounted in the housing, and provides rotational movement thereto. The linear drive piston has an input shaft that has ball bearings on its surface, and is inserted inside the output shaft of a revolution piston that has an inner surface with linear grooves. The actuators use hydrostatically charged integral bearing races that activate during operation to reduce friction. Combination linear and rotary actuators with double actuation output shafts are also provided.

Abstract: Provided is an arrangement and a method to detect an oil leakage between a first section and a second section of a hydraulic cylinder. A movable piston is arranged between the first and second section in a way that the piston changes position between the sections. The change in position is done in dependency of a difference between a first force, which acts at the first section on a first cross sectional area of the piston, and a second force, which acts at the second section on a second cross sectional area of the piston. The first section comprises hydraulic oil with a predefined first pressure, while the first force is calculated based on this pressure and based on the first area. The second section comprises hydraulic oil with a predefined second pressure, while the second force is calculated based on this pressure and based on the second area.

Abstract: A centering apparatus for bi-directionally pivotable hopper doors. The apparatus is coupled between a frame of a hopper car and a bell crank of a hopper door. The apparatus includes a housing with a piston extending from one end. An end of the piston within the housing includes a piston head. A pair of coil springs are disposed within the housing on opposite sides of the piston head and counteract one another to bias the piston head toward the center of the housing and thus bias the hopper door toward a closed state. In a second configuration the apparatus includes a double-acting actuator with a pair of independent piston assemblies. An actuation system coupled to the actuator maintains the actuator and an associated hopper door in a closed position in a normal state and returns the hopper door to the closed position upon a failure in the system.

Abstract: A method for automatically adjusting the position of an implement of a lift assembly of a work vehicle includes determining a tilt transition boom angle for the lift assembly, determining a closed-loop control signal associated with controlling movement of the implement based at least in part on the tilt transition boom angle, generating a valve command signal based at least in part on the closed-loop control signal, and controlling an operation of at least one valve associated with the implement based at least in part on the valve command signal to maintain the implement at a target implement angle as a boom of the lift assembly is being moved across a boom travel range.

Abstract: A compressor and a method of manufacturing the same are disclosed. The compressor includes a piston having a cylindrical shape and having formed therein a suction space, in which refrigerant gas is sucked, and a cylinder having, as a space formed therein, formed therein a compression space, in which refrigerant gas is compressed, by reciprocation of the piston in an axial direction. A gas inflow passage having one side communicating with a gas pocket outside the cylinder and the other side communicating with a space formed in the cylinder is formed in the cylinder, and the piston includes a plurality of fine irregularities formed in an outer circumferential surface of a guide facing the cylinder and provided at a position corresponding to the gas inflow passage.

Abstract: Provided is a hydraulic drive apparatus including a specific working actuator making a working arm perform a traveling assist motion upon the slip, first and second traveling motors, first and second hydraulic pumps, a traveling selector valve switchable to a neutral position and a straight traveling position, a communication throttle portion between a working fluid passage and a traveling fluid passage in the straight traveling position, and a switching control part switching the traveling selector valve to the neutral position when a single operation action is performed and to the straight traveling position when a specific combined operation action including a forward traveling operation and the specific working operation is performed. The switching control section adjusts the opening of the communication throttle section to decrease the flow rate therethrough with an increase in the difference between the first and second pump pressures.

Abstract: A hydraulic rotary drive includes a first rotary drive element and at least two annular pistons connected to the first rotary drive element in a rotationally fixed manner and configured to be axially movable on the first rotary drive element between two end positions. Each annular piston has two annular spur serrations directed away from one another. The hydraulic rotary drive includes a second rotary drive element with ring type serrations that are complementary to the spur serrations of the annular pistons. The hydraulic rotary drive includes a control unit that is configured to control supply of hydraulic fluid to the annular pistons to cause a reciprocating movement of the annular pistons on a shaft in accordance with an operating signal. The hydraulic rotary drive includes a sensor arrangement communicatively coupled to the control unit and arranged to detect the positions of the annular pistons along respective sliding paths.

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: A method of determining a homing position of a piston within a plunger assembly for a vehicle brake system at the beginning of an ignition cycle of the vehicle includes first providing a plunger assembly having a housing defining a bore therein. The plunger assembly includes a piston slidably disposed in the bore for pressurizing fluid within a pressure chamber when the piston is moved in a first direction. The plunger assembly further includes an electrically operated linear actuator for moving the piston within the bore. The method further includes providing electrical power to the linear actuator of the plunger assembly. The linear actuator is actuated to retract the piston in a second direction opposite the first direction towards an end stop. The piston engaging with the end stop is then detected.

Abstract: Provided is a master cylinder for an electronic brake system. The master cylinder for the electronic brake system includes a pedal simulator provided between a first master piston and a second master piston and having a rubber member that provides reaction force to a brake pedal, and the first master piston includes a first piston and a second piston coupled to be movable relative to each other and having a communication channel to allow a pressing medium to flow between a reservoir and a first master chamber, a communication channel sealing member configured to block a portion of the communication channel according to a relative movement of the first piston and the second piston, and an elastic member configured to provide elastic force in a direction in which the first piston and the second piston are spaced apart.

Abstract: Methods can comprise charging a first hydraulic device of a first hydraulic circuit with a first quantity of hydraulic fluid from a hydraulic fluid source. The methods can further comprise pressurizing a control segment and locking the first quantity of hydraulic fluid from exiting the first hydraulic circuit in response to hydraulic pressure within the control segment. The methods can also include unlocking the first quantity of hydraulic fluid to permit exiting of the first quantity of hydraulic fluid from the first hydraulic device in response to dropping the hydraulic pressure within the control segment after a delay. Hydraulic apparatus can comprise a normally open hydraulic pilot operated control valve that can be configured to hydraulically lock a first hydraulic device in response to a hydraulic pressure within a control segment rising to greater than or equal to an actuation pressure.

Abstract: A pneumatically driven fluid pump apparatus is disclosed which includes a pump casing having an inner wall, a pump cap secured at a first end of the pump casing, and a liquid discharge tube in communication with the pump cap and extending at least partially within an interior area of the pump casing toward a second end of the pump casing, and where fluid is admitted into the pump casing at the second end. The pump cap has an airflow inlet for receiving a pressurized airflow from an external pressurized air source, which helps displace liquid collecting within the pump casing upwardly through the liquid discharge tube. A flow channeling subsystem is in communication with the airflow inlet and directs the pressurized airflow towards the inner wall of the pump casing to create a swirling airflow within the pump casing that extends along at least portions of the inner wall.

Abstract: A motor creep control system includes at least one motor and a manifold fluidically coupled to the at least one motor and configured to control flow of a fluid through the at least one motor. The manifold includes an input port, an output port, at least one fluid control valve to control the at least one motor, and a motor creep control valve. A first state of the motor creep control directs the fluid from the input port, through the at least one fluid control and motor, and to the at least one output port. Meanwhile, a second state of the motor creep control in conjunction with the at least one fluid control valve being deactivated directs the fluid from the input port that leaks past the deactivated at least one fluid control valve to the at least one output port, while bypassing the at least one motor.

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.