Abstract: A cooling system and method for an auxiliary braking device of a hydrogen fuel cell truck, are provided in consideration that auxiliary braking force generated by the regenerative braking of the motor may be unnecessary and the brake resistor may be unnecessary when a sufficient amount of auxiliary braking force is generated alone by the operation of a retarder. A portion of thermal energy generated by the retarder is distributed to a stack cooling system so that the portion of thermal energy is removed by the stack cooling system. Accordingly, due to sufficient cooling of the retarder, a sufficient amount of auxiliary braking force is provided, and the brake resistor that has consumed surplus electrical energy generated by regenerative braking is removed.

Abstract: A backflow prevention assembly is configurable with varying lay-lengths and orientations. The assembly includes coupling assemblies and valve bodies that adjust in length and/or rotation to allow for the varying lay-lengths and orientations of the backflow prevention valves and assemblies with and without certification. A coupling assembly is connected to a backflow prevention valve and includes an outer sleeve and an inner sleeve that is slidingly received within the outer sleeve. The lay-length is adjusted by slidably moving the inner and outer sleeves with respect to one another.

Abstract: A respirator directional valve (10) includes a valve housing (12), a plurality of valve flaps (16-18), which can be moved by a gas stream or by a flowing medium and are arranged at the edge, and a number of support surfaces (20-22) as a valve seat. A number of support surfaces (20-22) corresponds to a number of valve flaps (16-18). Each valve flap (16-18) is adapted to a surface of a respective support surface (20-22). The support surfaces (20-22) are sloped in relation to a cross-sectional surface through the valve housing (12). The support surfaces (20-22) together form a tip pointing in the flow direction of the respirator directional valve (10). A method for manufacturing such a respirator directional valve (10) is provided including method features relating to the use of such a respirator directional valve (10).

Abstract: The present invention provides valve assembly for use in a floor drain. In various embodiments, the valve assembly comprises a substantially cylindrical seal frame, the seal frame defining a seal frame wall and at least one support wall extending in the longitudinal direction of the seal frame, a flexible sealing member located proximate a distal end of the seal frame, and an attachment tab configured to secure the flexible sealing member to the seal frame, wherein the seal frame and the support wall are further configured to create a resting deflection of the flexible sealing member, such that fluid may flow through the valve assembly in one direction, and the flow of gasses through the valve assembly is prevented in the opposite direction.

Abstract: A valve having an inlet, exhaust, control port, and diaphragm. The diaphragm moves between an open position, in which the inlet and exhaust are in fluid communication, and a closed position, in which the diaphragm blocks fluid from flowing between the inlet and the exhaust. The diaphragm moves from the closed position to the open position when an inlet force due to pressure at the inlet is greater than the sum of the biasing force and a control port force due to pressure at the control port. The valve is operable to automatically drain contaminants from a vehicle air reservoir when the vehicle's emergency brakes are set. To reduce noise, the diaphragm of the valve is preferably in tension when in the closed position, and/or the diaphragm opens a limited distance when in the open position so that a back pressure is generated at the inlet.

Abstract: In one aspect, a system for controlling the direction of travel of agricultural implements may include a work vehicle having a vehicle-based controller configured to control an operation of a valve provided in operative association with the work vehicle. The system may also include an agricultural implement configured to be towed by the work vehicle. The implement may include a sensor configured to detect an operational parameter indicative of a direction of travel of the implement. The implement may also include an actuator configured to adjust the direction of travel of the implement, with the actuator being fluidly coupled to the valve such that the valve is configured to control an operation of the actuator. The implement may further include an implement-based controller configured to initiate control of the operation of the valve based on sensor data received from the sensor to adjust the direction of travel of the implement.

Abstract: A valve includes a housing with a mounting portion, a venting portion, and a cap portion. The valve also includes a piston in the housing with a shaft, a disc, and a flange, the piston being moveable between a closed position and an open position. The valve also includes a vessel that is in contact with the cap portion and the flange wherein fluid pressure contained in the vessel biases the piston into one of the opened position and the closed position.

Abstract: A microfluidic thermal bend actuated pressure pulse valve having an inlet for receiving a flow of liquid, an outlet for outputting the flow of liquid, a meniscus anchor between the inlet and the outlet such that the flow from the inlet towards the outlet stops at the meniscus anchor where the liquid forms a meniscus, a movable member for contacting the liquid, and, a thermal expansion actuator for displacing the movable member to generate a pulse in the liquid to dislodge the meniscus such that the liquid flow towards the outlet resumes.

Abstract: Provided is an easy to use valve controller designed to obtain optimum operation performance. The valve controller is designed to control the valve opening of an expansion valve by calculating the valve opening such that a detected temperature coincides with a target temperature. The valve controller includes an automatic for calculating a deviation between the detected temperature and the target temperature and for calculating a changing amount of the valve opening by substituting at least the deviation and a set control parameter into an arithmetic expression to automatically set the control parameter. The valve controller further includes and control level adjuster for adjusting a magnitude of the valve opening calculated with the control parameter set by the automatic tuning means in stages in accordance with a set control level.

Abstract: An agricultural implement system is provided that includes a valve in fluid communication with first and second actuating cylinders and with first and second fluid conduits. The valve is configured to control fluid flow from the first and second fluid conduits to the first and second actuating cylinders. Furthermore, a controller is communicatively coupled to first and second pressure sensors and to the valve. The first pressure sensor is coupled to the first fluid conduit, and the second pressure sensor is coupled to the second fluid conduit. The controller is configured to determine whether the first fluid conduit or the second fluid conduit is supplying fluid to the valve based on signals from the first and second pressure sensors, and to automatically control fluid flow to the first and second actuating cylinders such that wheel assemblies are rotated to a desired angle relative to an implement frame.

Abstract: There is provided a rotary valve for fluid analytical systems. The present valve provides improved characteristics such as an extended lifetime. The valve can fulfil different fluid analytical functions and can be a multi-ports and/or multi-positions valve. The valve is provided with extra recesses in the rotor and extra ports in the stator. These recesses allow to cancel the effect of any possible leaks by evacuating them. Such a valve then prevents cross-port leaks and can advantageously be used in highly critical applications. Moreover, the present valve can be used in an analytical system which is advantageously self-diagnostic.

Abstract: To provide an inexpensive hot-water supply system that allows a user to readily select a desired unit for a physical quantity indicated on a display section of a remote controller. A bathroom-installed remote controller 4 is provided with a indication unit switching device that switches the units of hot-water temperature and hot-water amount represented by data transmitted from a water heater and indicated on a display section 20 between Fahrenheit/gallon (shown in FIG. 3(a)) and Celsius/liter (shown in FIG. 3(b)) depending on the presence or absence of long press of an operational switch 32 while the water heater is in a stand-by state.

Abstract: A device for driving a plurality of hydraulic shift cylinders, especially shift cylinders for shifting gears of a twin-clutch transmission, includes a first slide valve having a control intake to which control pressure is applied, a system pressure intake to which system pressure is applied, two outlets and at least one return outlet, the one outlet being connected to the system pressure intake and the other outlet being connected to the return outlet, as desired, and a valve device connected to the outlets of the slide valve via which the shift cylinders may be selectively actuated.

Abstract: In an apparatus capable of distilling and refining an easily polymerizable substance, piping is performed so that when a strainer in action is switched to a backup strainer, the strainer can be switched after removing air in the backup strainer to replace air in the backup strainer with a discharge liquid of a pump. According to the apparatus, switching the strainers installed on an upstream side of the pump for extracting a liquid of a vacuum distillation column, which distills and refines the easily polymerizable substance, can be performed with no trouble during operation of the distillation column. When the apparatus includes a device for measuring a differential pressure between an upstream side and a downstream side of the strainer in action, two or more strainers installed in parallel can be switched at proper times and the easily polymerizable substance can be produced efficiently.

Abstract: The invention provides a pressure reducing valve in which a minimum pressure can be secured even when an engine speed is reduced. A pressure reducing valve changing an output pressure in correspondence to an engine speed has means for outputting a predetermined minimum pressure when the engine speed is equal to or less than a first predetermined rotational speed.

Abstract: A variable displacement compressor having a pressurizing passage, which extends through a cylinder block. The pressurizing passage connects a discharge chamber and a crank chamber. A valve is arranged in the pressurizing passage. A drive shaft rotates and produces centrifugal force that causes the valve to open the pressurizing passage. The pressure of the crank chamber is increased when the rotation of the drive shaft is accelerated thereby opening the pressurizing passage with the valve. This moves a swash plate such that its inclination, relative to a plane perpendicular to the drive shaft, decreases. As a result, the compressor shifts from a maximum displacement state to a minimum displacement state, which improves the acceleration performance of an engine connected to the compressor. Furthermore, the displacement of the compressor in the minimum displacement state is 50% of that in the maximum displacement state. This prevents an excessive decrease in the cooling capability of the compressor.

Abstract: A flow control device or valve used in a power steering system of an automotive vehicle. The flow control device comprises a housing formed with an axially extending hole in which a spool valve is movably disposed. A first pressure chamber is defined in the hole, with one end of the spool valve. A drain passage is opened to the first pressure chamber and closable with the spool valve. A second pressure chamber is defined in the hole, with the other end of the spool valve. A restricting orifice is provided to be communicated with the first pressure chamber. An introduction passage is formed to be communicated through the restricting orifice with a discharge passage and opened to the first pressure chamber. The pressure in the discharge passage is introduced to the second pressure chamber. A first spring is disposed in the second pressure chamber to bias the spool valve in a direction to close the drain passage. A spring holding member is movably and coaxially disposed in the axially extending hole.

Abstract: An apparatus for preventing the outflow of a fuel from a fuel tank for vehicle comprises a vent tube device connected to the fuel tank and a canister device connected to the inlet system of an engine to supply the fuel into the tank, an evaporating tube device separated from the vent tube device and connected to the fuel tank and the canister device to supply the evaporated fuel within the tank to the canister device, a shut-off valve disposed in the vent tube device to pass and interrupt the fuel flow through the vent tube device, an opener switch for detecting the opening and closing states of a lid opener opening and closing a filler lid for supplying the fuel into the fuel tank, and a control device for controlling the opening and closing of the shut-off valve by the opener switch to open the shut-off valve only in the open state of the lid opener.

Abstract: A process for conveniently transporting particulate coal and crude oil together as a slurry through a pipeline. The coal, having particle size of 20-350 mesh size range, is added to the oil in sufficient amount to form a transportable coal-oil slurry. The slurry is maintained at sufficient velocity and turbulence in the pipeline to prevent solids settling, and also at sufficient pressure, temperature, and time conditions to liquify at least 5 weight percent of the coal. Also, when the sulfur content of the coal used is less than the oil, the sulfur content of the delivered oil portion is reduced during its transit through the pipeline. At its destination, the oil portion can be separated from the slurry and passed to refining operations, while the coal along with some contained heavy oil can be either liquefied to produce hydrocarbon liquid fuel products, or burned as fuel in a power plant.

Abstract: An apparatus for providing selective fluid communication between a helium transporter and an electric machine with superconductive exciter windings includes a coupling of the transporter which is mated to an undriven end of the shaft of the electric machine. Passages in the coupling and shaft supply liquid helium to the winding and return warmed liquid helium to the transporter. Quick interchangeability of the transporter is facilitated by a bayonet fitting and a spring biased sealing arrangement between corresponding passages in the coupling and shaft. A pressure actuated valve in the passages is provided to interrupt fluid communication when the pressure of the liquid helium falls below a predetermined value. A centrifugal force actuated valve in the passages is provided to interrupt fluid communication when the shaft speed falls below a predetermined value.

Abstract: A system to protect piping and containers from damage by freezing of contained aqueous liquid includes a temperature-actuated SPDT switch connected at its movable contact to a rechargable battery. The fixed contacts of the switch are connected to two input terminals of a DC motor of a motor-actuated valve having its valve opened or closed depending upon the operation of the switch. The movable contact normally engages the fixed contact that provides voltage to close the valve, if open, as the sensed temperature is above about 35.degree. F., but moves to the other fixed contact when the temperature drops to 35.degree. F. to open automatically the valve. A relay having a coil energized by AC power has a normally open contact coupling the motor and the fixed contact used to close the valve so that closing is inhibited, if the AC power is off, until power is on.

Abstract: A governor is adjusted as to speed by having a fluid diaphragm directly connected to a speeder spring which acts against a thrust bearing which bears against the flyweight toes. The fluid diaphragm is resisted by a set of low speed springs at all times. A lost motion arrangement brings a set of normal speed springs into use at larger diaphragm movement so that the response to the speed adjustment varies for different values of pressure acting upon the diaphragm.

Abstract: An arrangement for metering a blast of air delivered to a driven machine, particularly a sheet separation device of a sheet feeder. A control slide is connected via an air intake opening to a pressure source, and the control slide has an air discharge opening connected to the driven machine and leading into the open. The latter opening is controlled or disconnected during upward movement or stoppage of the machine coupled to the driven machine by means of a control element actuated as a function of the machine speed. The air intake opening and the air discharge opening leading to the driven machine, face each other coaxially, and upon reaching a set final speed, these openings are connectable by means of a coaxial recess passing through the control element. A rotary valve plug with a through-bore is provided to form the control element.

Abstract: This disclosure deals with a variable fluid pressure regulator wherein the level at which the fluid pressure is regulated is adjustable. A member has a flow passage formed therein, and the fluid flows through the passage and out of the member, and a closure is positioned over the opening. The closure is yieldably mounted relative to the member and a spring urges the closure toward the opening. A recess or cavity is formed in the closure, and the fluid flows from the opening, into the recess, and then through a space between the closure and the member. The fluid pressure in the passage is a function of the spring force and the effective area of fluid pressure on the closure, and the effective area comprises the area of the opening plus any area of the recess which lies outside the margin of the opening. The regulated fluid pressure level may be varied by laterally shifting the closure relative to the opening in order to change the effective area.