Abstract: A relief valve is provided in a dishwasher for relieving an overpressure condition in the washing chamber of the dishwasher. The relief valve includes a cap portion fitting over a chimney opening and a base portion slidably extending into the chimney. The cap portion has a plurality of small perforations allowing for passage of overpressure air flow while precluding the passage of suds.

Abstract: A viscous polymer is passed through a filament or thread forming apparatus and introduced into a flowing solvent. The polymer containing solvent is then passed through a shear strain apparatus where the polymer not formed into filaments or threads is formed into long fibers and the solvent and polymer are thoroughly blended. The polymer and solvent leaving the shear strain apparatus may be introduced into a holding apparatus wherein the polymer and solvent are retained until the polymer has gelled.

Abstract: In a hydraulic power steering control unit of the type having an inner steering wheel operated control member which has limited relative rotation movement with respect to outer control member which controls a conventional steering motor, passages are provided in these members to control the pressures therebetween to prevent jamming thereof.

Abstract: A trailer with piping and accessories capable of maintaining the ultra high purity of a cryogenic liquid while receiving and transporting the liquid, purging an external receiver, and transferring liquid to the receiver. The trailer has a heat exchnger for vaporizing a liquid flow from its liquid container into warmed gas. The gas is used for purging an external receiver and for pressurizing the liquid container sufficiently to transfer liquid into the purged receiver. The trailer piping allows purging of and then transferring to the receiver without opening any connections. The number of welded surfaces in the trailer capable of trapping and generating contaminants are reduced, particularly the number of welded penetrations of the liquid container.

Abstract: A viscous polymer is passed through a filament or thread forming apparatus and introduced into a flowing solvent. The polymer containing solvent is then passed through a random flow path apparatus where the polymer is broken into fine particles and the solvent and polymer are thoroughly blended. The polymer and solvent leaving the random flow path apparatus may be introduced into a holding apparatus wherein the polymer and solvent are retained until the polymer has gelled.

Abstract: A charge pressure priority valve for supplying a flow of sufficient pressure to energize an auxiliary implement while supplying a nearly constant pressure flow to a hydrostatic fluid circuit includes a valve body having an interior bore with a pump inlet passage for communicating a flow from a hydraulic pump thereto. A main flow outlet passage extends from the interior bore for supplying fluid to the hydraulic fluid circuit and has a main flow feedback passage interconnecting the main flow outlet passage and the interior bore. An auxiliary flow outlet passage extends from the interior bore for supplying a flow of sufficient pressure to energize an auxiliary implement. A valve spool is disposed within the interior bore and defines a central chamber intermediate a pair of spaced apart end chambers in the bore, with one of the pair of end chambers being isolated from the other of the pair of end chambers.

Abstract: A high accuracy fill control is accomplished by using a drop-drop cam-operated timer switch in parallel with an electromagnetic water valve in series with a motor start relay and main motor machine windings. The drop-drop cam-operated timer switches almost instantaneously from one position to another, so the timer air gap variable created by the normal rise to make and activate transition is eliminated and other variables are not introduced.

Abstract: A micropanel for the delivery of gas from a supply cylinder to a tool location comprises an arrangement of valves, pressure regulator and associated components adapted to enhance the purity of the delivered gas and the safety of the gas delivery panel.

Abstract: A motion balanced pneumatic pressure controller comprised of a tubular housing having a diaphragm for sensing a process pressure on one side and a second diaphragm for sensing a pneumatic output signal on the other side; both diaphragms are connected by a stem passing the length of said housing and having valving means attached to open or close a bleed port within the second diaphragm to modulate a pneumatic signal pressure derived from compressed air passing a primary adjustable restriction in direct proportion to the movements of the first diaphragm, such movements being the results of process fluid pressure changes on the first diaphragm being supported by the force of adjustable springs.

Abstract: An improved pilot valve is disclosed having a flow path from the inlet to the sense cavity via the valve spindle. An articulated disk is provided at the bottom of the valve spindle and is secured thereto by a hollow screw. Such articulated disk can adjust itself to the valve seat below to provide sealing of the valve to the seat in cases where the valve spindle is not perfectly axially aligned with the seat. A spacer between the upper and lower diaphragms is provided for maintenance of proper effective areas of such diaphragms and for prevention of resistance to valve stem motion.

Abstract: A dual-tank fuel utilization system is provided wherein a valve apparatus is used to control flow between dual fuel tanks and an engine, the valve apparatus comprising a housing having a plurality of inlet ports and exit ports and defining a plurality of passages therein and switching means for selectively blocking one of the passages while simultaneously allowing flow through another of the passages.

Abstract: A mechanical flexure element useful for motion amplification with a closed end and two legs extending therefrom in a general U-shaped configuration. One leg may be fixed and the other leg moved, or both legs may be movable with respect to each other. Microdisplacements of a leg are amplified and translated into larger transverse movements of the closed end. Reversing the input and output displacements provides attenuation of a larger input displacement. A magnetostrictive electromechanical transducer with a flexure element having a closed end and two legs extending therefrom moving towards and away from a nozzle in an enclosed nozzle chamber under fluid pressure. An electrical input signal actuates a magnetostrictive element coupled to one leg of the flexure element to move the element with respect to the nozzle thereby changing the fluid output pressure from the nozzle chamber.

Abstract: An automatically resetting mechanical valve used to control unwanted discharge of liquids less dense than water, principally oil, which may be present in waste water flows. The valve is closed by sinking both a primary float and a secondary float, each less dense than water but more dense than the liquid whose discharge is to be stopped. The sinking primary float effectively closes an orifice in an outlet conduit upon the sinking primary float's becoming sufficiently immersed in the less dense liquid. Upon the reintroduction of water, the secondary float acts upon a lever of high mechanical advantage, which pries the primary float upward, which, in turn, allows hydraulic pressure inside and outside the conduit to equalize, thereby allowing the primary float to unseat and the valve to automatically re-open.

Abstract: The safety of control may be secured by decreasing error in the valve position detection to increase the accuracy of flow control and stopping the control function when the valve is in an abnormal condition, so as to prevent any malfunction. The valve position is controlled so that the valve opening rate may correspond with the intended opening rate. When judgement is made to determine that said valve opening rate corresponds with the full-closed position, an output signal produced by the means for detecting the valve displacement when the valve is in the full-closed position is updated and stored as a new signal showing the valve full-closed position, and the intended opening rate of the valve is corrected with reference to the stored value.

Abstract: A system for controlling fluid flow between a first point and a second point on a fluid line is disclosed. The system includes the first valve located at the first point on the fluid line to permit forward fluid flow from the first point to the second point on the fluid line and for closing to prevent such forward fluid flow. The system also includes flow sensors for detecting forward fluid flow at the second point and opening the first valve when such forward fluid flow is detected. The flow sensors also close the first valve when fluid flow at the second point stops. The system further includes a second valve located at the second point for opening and closing to control forward fluid flow at the second point. The system prevents forward fluid flow if a break in the fluid line occurs between the first and second points by preventing the first valve from opening.

Abstract: A transducer having an explosion-proof housing with a divider forming two compartments, and the divider having formed therein a well. A magnet and flapper arm arrangement is suspended within the well. A coil winding is fixed in the other compartment around the well so that a magnetic field generated thereby influences the pivotal position of the magnet. Set screws adjustable in the bottom of the well are effective to preset a rest position of the magnet.

Abstract: A mass flow controller having a bypass portion provided in a body through which a large amount of gas is passed and a sensor portion, laid between a primary chamber which is an inlet of the bypass portion and a secondary chamber which is an outlet of the bypass portion, through which gas flows at a small flow rate proportional to the flow rate of the gas passed through the bypass portion and capable of measuring the total flow rate of gas by measuring the flow rate in the sensor portion. The body is partitioned by a bulkhead into a primary chamber and a secondary chamber. The primary chamber is provided with an inlet for gas inflow and the secondary chamber is provided with an outlet for gas outflow. The bulkhead is provided with a plurality of through holes for connecting the primary chamber to the secondary chamber, and bypass elements selected depending on the flow rate in the bypass portion are fitted in the through holes in the bulkhead.

Abstract: A method for controlling a refrigerant path apparatus including a pressurized gas refrigerant path for a flow of a pressurized gas refrigerant which has not been substantially cooled to be liquefied, a pressurized liquid refrigerant path for a flow of a pressurized liquid refrigerant which is generated from the pressurized gas refrigerant by being cooled to be liquefied, a first heat exchanger means which is fluidly connected to the pressurized gas refrigerant path to supply the pressurized gas refrigerant into the first heat exchanger so that a heat exchange is carried out between the pressurized gas refrigerant in the first heat exchanger and the outside of the first heat exchanger, comprises the steps of allowing a flow of the refrigerant from the pressurized gas refrigerant path to the pressurized liquid refrigerant path when a supply of the pressurized gas refrigerant from the pressurized gas refrigerant path into the first heat exchanger means is prevented, and preventing the flow of the refrigerant fro

Abstract: A cleaning device for heat exchangers mounted on construction machines such as a bulldozer, for example, and for water pipe that can be cleaned without removing the heat exchanger or pipe from a machine, includes a cleaning water storage tank (1) connected to a pump (2) for pumping water under pressure to a heat exchanger (a) through pressure and flow regulating valves (31, 32) and a gas-liquid mixer (5) to which gas is fed from tank (6) for pulsating and producing gas bubbles in the water flow for effecting the cleaning. Flow control valves (7, 9) control the direction of flow through the heat exchanger and a strainer (8) removes the residue cleaned and carried by the water. An accumulator (4) is connected in the flow circuit with the regulating valves (31, 32) to absorb shock when the regulating valve (32) is closed and which functions together with the valves (31, 32) to produce a pulsation in the water flowing in the system.

Abstract: A stand-alone electropneumatic closed loop servo system, with a separate gas supply to an air actuated cylinder, provides pressure, position, or fluid flow control of a variable conductivity valve in a device by automatically varying the conductance of the device. The air cylinder defines a control chamber and a smaller volume response chamber separated by a piston operatively connected to the variable conductivity valve. The gas supply includes a constant pressure line, with a pressure regulator valve and a check valve, into the control chamber and a variable pressure line, with a variable pressure solenoid valve, into the response chamber. A feedback signal from the device to a controller is compared to a desired pressure set point. The controller signals the solenoid to vary its output pressure thereby causing the piston to move accordingly to actuate the variable conductance valve.