Abstract: A solenoid valve includes: a valve housing having, at one end thereof, an inlet port through which a fluid is introduced and having, at the other end thereof, an outlet port through which the fluid is discharged; a solenoid provided in the valve housing and disposed between the inlet port and the outlet port; a first plunger provided at one end of the solenoid adjacent to the inlet port and configured to selectively open or close the inlet port by being rectilinearly moved by the solenoid; a first spring member configured to provide elastic force to allow the first plunger to move in a direction in which the first plunger closes the inlet port; a second plunger provided at the other end of the solenoid adjacent to the outlet port and configured to selectively open or close the outlet port by being rectilinearly moved by the solenoid in a direction opposite to the movement direction of the first plunger; and a second spring member configured to provide elastic force to allow the second plunger to move in a dir

Abstract: Systems and methods for optimizing the application of pulse width modulation (PWM) in a voltage signal for delivering a current in a valve used to alternatively deliver pressurized gas to and vent from chambers in a vitrectomy probe used to drive a cutter.

Abstract: A chemical liquid dilution system includes a first material offering device providing fluid, a second material offering device, and a mixing device. The second material offering device provides liquid. The mixing device includes a fluid mixer, a first connection port, a second connection port, and an output port. The fluid mixer has a fluid limiting channel with an interface communicating with the first connection port and another interface communicating with the second connection port and the output port. The first connection port is connected to the first material offering device. The second connection port is connected to the second material offering device. After the fluid passes through the first connection port and the fluid limiting channel, the fluid and liquid are mixed up to form a diluted chemical liquid, and the output port discharges the diluted chemical liquid. A chemical liquid dilution method is also disclosed.

Abstract: A seal for use in a fluid control valve includes: a first, elastically deformable, plastic part; and a second plastic part configured as a hard seal element and connected to the first plastic part. The first and the second plastic parts form a seal assembly having a first frontal end configured to bear in a sealing manner on an actuatable valve body of the fluid control valve, and a second frontal end configured to bear in a sealing manner on a valve housing of the fluid control valve, wherein at least the first frontal end has a first end side having an encircling projecting bead configured to seal against the actuatable valve body.

Abstract: A refrigerator appliance includes a water system. The water system has a fluid circuit and valve assembly. The valve assembly is configured to control flow through the fluid circuit. The valve assembly has a valve, at least one actuator disposed on the valve, and a framework configured to secure the at least one actuator to the valve. The framework has first and second upright members, a crossmember, and an electrical connector. The first and second upright members secured to the valve on opposing sides of the at least one actuator. The crossmember is secured to opposing ends of the first and second upright members relative to the valve such that the valve, first upright member, second upright member, and crossmember form a closed loop around the at least one actuator. The electrical connector is electrically connected to the at least one actuator and is secured to the crossmember.

Abstract: A valve assembly is adjustable in three independent ways allowing it to provide a variable input volume. The valve assembly has a base and an entrance plate. An outer guide, an inner guide and a shaft, each with a passage, are held together and the shaft is rotatable between the guides. The valve is open when the passages of the inner guide plate and shaft are aligned and closed when the passages are not aligned. The shaft RPM determines how many times per minute the valve opens. The open/closed ratio of the valve assembly determines how long the valve is open during each half revolution. The location of the shaft up or down in relationship to the inner guide determines what percentage of possible flow passes through the valve during each half revolution. The valve assembly can be used with either a gas or liquid medium.

Abstract: Systems and methods for a solenoid supervisory detection system which can detect the presence or absence of a solenoid plunger within a solenoid coil. These systems can be used to verify correct reassembly of a solenoid valve after it has been disassembled for testing.

Abstract: The present disclosure provides: at least one component of a rotary valve subassembly; a rotary valve assembly including the rotary valve subassembly; a hydraulic circuit including the rotary valve assembly; an assembly including a robot that incorporates the hydraulic circuit; and a method of operating the rotary valve assembly. The at least one component of the rotary valve subassembly includes a spool. The at least one component of the rotary valve subassembly includes a sleeve.

Abstract: A valve trim includes a body having a plurality of parallel flow passages extending from a first end of the body to a second end of the body, opposite the first end. Each flow passage includes a throat and an expansion chamber and each throat is nested between the expansion chambers of directly adjacent flow passages.

Abstract: An electrically operated valve includes a rotor, a stator assembly, a sleeve, a valve assembly, a box body, a circuit board assembly, and a valve port. The stator assembly is disposed outside the rotor, and the stator assembly includes a coil assembly. The sleeve is configured to isolate the stator assembly from the rotor. The valve assembly includes a spool. The box body has a cavity, and the circuit board assembly is accommodated in the cavity. The rotor is configured to drive the spool to move close to or away from the valve port.

Abstract: A multi-passage coolant valve may include an outer housing including an outer body formed with a first outer inlet, a second outer inlet, a first outer outlet, and a second outer outlet, and an auxiliary body formed with a third outer outlet, and an inner housing rotatably provided in the outer housing. As the inner housing rotates by a predetermined angle, the first outer inlet and the first outer outlet are fluidly communicated with each other, the first outer inlet and the second outer outlet communicate with each other, and the second outer inlet and the third outer outlet communicate with each other.

Abstract: A solenoid valve assembly is provided. The solenoid valve assembly includes a pilot assembly, a body, and a main poppet valve assembly. The pilot assembly includes a frame having an external wall and an internal wall forming an annular cavity. The body includes an inlet cavity, a channel, an outlet cavity, and a main poppet valve seat disposed in the channel between the inlet cavity and the outlet cavity. The main poppet valve assembly includes a main poppet valve and two movable sealing elements. The main poppet valve has a cylindrical shape having an internal diameter, an external diameter, and grooves. The main poppet valve is at least partially disposed in the annular cavity and configured to shut the main poppet valve seat. The movable sealing elements are disposed in the grooves to seal the main poppet valve to the external wall and the internal wall of the frame.

Abstract: Hydrogen discharge system for a truck and truck comprising such system The invention concerns a hydrogen discharge system (14) for a truck, this system comprising a pipe (16) provided with at least one discharge opening (162), a deflector (18), that is rotatably mounted with respect to the pipe and that includes a vent, for venting hydrogen exiting through the discharge opening. The system further includes a balancing weight (22) secured to the deflector (18), so as to maintain the deflector in a configuration wherein the vent is facing upwards with respect to the ground, in order to always discharge hydrogen upwards relative to the ground.

Abstract: A handwashing valve structure includes a mounting structure, a dispensing structure, and a control structure. The mounting structure is configured to attach to a liquid vessel. The dispensing structure is configured to dispense a liquid from the liquid vessel and is movable between a closed position and an open position. The control structure is configured to move the dispensing structure between the closed position and the open position. The control structure is configured to be moved by pressure from a portion of a user's body to move the dispensing structure from the closed position to the open position. The dispensing structure is configured to automatically move from the open position to the closed position in the absence of any pressure from the portion of the user's body onto the control structure.

Abstract: A multi-fitting rotatable fluid connection apparatus comprising a fluid entry fitting and first and second fluid discharge fittings. The fluid entry fitting comprises a first end connector threaded for attachment to a fluid source, and first and second distribution connectors. The first fluid discharge fitting has a first intake connector which receives fluid from the first distribution connector. A first rotation member is coupled between the first intake connector and the first distribution connector such that the first fluid discharge fitting is rotatable about a first axis of rotation. The second fluid discharge fitting has a second intake connector which receives fluid from the second distribution connector. A second rotation member is coupled between the second intake connector and the second distribution connector such that the second fluid discharge fitting is rotatable about a second axis of rotation.

Abstract: An actuator of a refrigerant valve is described, the actuator comprising a housing (5) having a chamber (12) with an opening (15) in an end face (26) of an end section (17) of the housing (5), the end section (17) having an outer thread (18), a tightening collar (6) having a radially inwardly protruding flange (20) and an inner thread (19) matching the outer thread (18), and an anchor ring (7) positionable between the tightening collar (6) and the end face (16), wherein the anchor ring (7) is elastically deformable at least in a radial direction with respect to an axis of the outer thread (18) and in a mounted condition at least partially overlaps the end face (16) and the flange (20) of the tightening collar (6), wherein a sealing ring (8) at the end face (16) shows a free side to the axial direction and is com-pressed by an axial force produced by screwing the tightening collar (6) onto the outer thread (18).

Abstract: A diagnostic method for solenoid valves includes detecting, at excitation of the solenoid, a variation rate of the supply voltage of the solenoid and comparing it with a predetermined value, generating an error signal if the variation rate is lower than the predetermined value, otherwise, detecting characteristics of the waveform of the solenoid current over a time interval between a moment of excitation of the solenoid and a moment wherein the movable core reaches end-stroke position, comparing the detected characteristics with threshold values, generating an alarm signal if the detected characteristics are lower than the threshold values, otherwise calculating the value of solenoid resistance and comparing it with a minimum resistance value and a maximum resistance value when the solenoid current is in steady state, and generating an alarm signal if the solenoid resistance value is lower than the minimum resistance value or greater than the maximum resistance value.

Abstract: A flow path switching valve includes (a) a valve body in a shape of a rectangular parallelepiped having a predetermined surface and an opposite surface, the valve body including an open flow passage having an opening on the predetermined surface, (b) a main body including a plurality of ports having a respective opening on a facing surface thereof facing the predetermined surface, and a plurality of connection flow passages each connected to respective one of the plurality of ports, (c) a pair of plate springs attached to opposite ends of the valve body to support the valve body with a predetermined gap formed between the predetermined surface and the facing surface, the plate springs applying elastic force to the valve body in accordance with an amount of movement of the valve body in a predetermined direction, and (d) an actuator for reciprocating the valve body in the predetermined direction.

Abstract: A microfluidic valve formed in a body having a first and a second surface; an inlet channel extending in the body from the second surface; a first transverse channel extending in the body in a transverse direction with respect to the inlet channel; and an outlet channel extending in the body from the first surface. The inlet channel, the first transverse channel and the outlet channel form a fluidic path. The microfluidic valve further has an occluding portion, formed by the body and extending over the transverse channel; and a piezoelectric actuator coupled to the occluding portion and configured to move the occluding portion from an opening position of the valve, where the occluding portion does not interfere with the fluidic path, and a closing position of the valve, where the occluding portion interferes with and interrupts the fluidic path.

Abstract: A safety valve is provided with an electronic control unit for generating a control voltage. An electro-fluidic preliminary stage has a piezo bending actuator which can be actuated between a working position and a safety position by the control voltage and influences the flow of a secondary control fluid flow depending on its position. A fluid-mechanical main stage has an influencing device for influencing the flow of a primary working fluid flow. The influencing device can be actuated by means of the secondary control fluid flow which flows into a control chamber of the main stage. The control unit caries out a test of the preliminary stage repeatedly in an iterative manner after the expiration of a specified time interval. As part of the functionality test, the position of the piezo bending actuator is changed slightly by varying the control voltage.