Abstract: A system for mixing a first grade of fuel with a second grade of fuel to create a third, intermediate grade of fuel includes a blend valve and a novel shut-off system for stopping fuel from flowing from the blend valve to a dispensing meter when either the first grade of fuel of the second grade of fuel is not being supplied to the blend valve.

Abstract: A power steering device using a generally triangular valve member selectively pivoted by the pressurization of two chambers on either side of such valve member.

Abstract: A descending stream of molten metal is electromagnetically metered by a primary coil surrounding an upstream portion of the stream. Alternating electric current flows through the coil, and the frequency of that current is controlled to optimize the electromagnetic efficiency (magnetic pressure/power loss) of the electromagnetic metering system. Direct current can be added to the alternating current to also optimize electromagnetic efficiency.

Abstract: Selective valves to pass fluids consisting of a body and a housing, provided with a midway communicating passage in which is placed a dynamically governed mechanical system able to separate gases from fluids compressed by a subsurface oilfield pumps. The mechanical system utilizes a pair of half-shells, a ball or equivalent, provided with or acting on a roughness controlled surface which allows only a gas to pass.

Abstract: An apparatus having a pair of normally closed solenoid valves is retrofitted between hot and cold water inlets and a mixing faucet. Each valve includes a bypass with a mechanically operated valve. A flexible conduit is used to connect each of the valves to the faucet. A switch and an electrical circuit is used to simultaneously open the solenoid valves.

Abstract: An improved chemical feeder employing periodic partial immersion in a forced circulation system is provided having a soluble chemical hopper, and a dissolving chamber into which the soluble chemical chamber extends an adjustable distance and a discharge chamber in fluid flow communication with the dissolving chamber to selectively receive chemically treated water from the dissolving chamber and discharge it into a flow loop connected to the forced circulation system. A visual indicator ring is preferably present to show the height of the hopper. The adjustable hopper allows an expanded range of chemical feed rates for the feeder.

Abstract: An axicage multistage choke (10) wherein fluid flow is caused to impinge upon itself at each stage. Fluid entering inlet (14) is distributed by primary annulus (32) around the interior of upper cage (30). Fluid enters upper cage port (36) and impinges on itself in axial chamber (37). Fluid leaves chamber (37) through stem slots (38) into secondary annulus (42). From secondary annulus (42) fluid passes through lower cage ports (46) into axial chamber (47), again impinging on itself and dissipating energy. Fluid leaves choke (10) through outlet (16). Additional stages maybe added depending on the flow rate or pressure drop desired in the valve.

Abstract: A pneumatic control valve (10) including a valve body (12) with fixed aperture plate (14), a movable redirector (18) and a force motor (26). The force motor (26) supports the redirector (18) adjacent to the aperture surface (16) of the fixed aperture plate (14) and is operable to move the redirector (18) back and forth along a line (28) without contacting the aperture surface. The aperture surface (16) has a plurality of apertures (70,72,74,76,78) with metering edges (124,126,128,130,132,134,136,138). The redirector (18) has redirector cavities (102,104,106,108) with metering edges (140,142,144,146). The force motor (26) deflects the redirector (18) to positions in which one or more of the cavities in the redirector connect two or more of the apertures (70,72,74,76,78) and direct fluid from some apertures and into other apertures. The location, length and shape of the metering edges can be varied as required to obtain desired fluid flow characteristics.

Abstract: A servovalve apparatus for use in fluid systems which comprises an elongate flexible valve element having a fixed end and a free, moveable end, and a conductive coil which surrounds at least a portion of the valve element adjacent its fixed end. An armature is secured to the valve element so as to be adjacent the conductive coil. Two permanent magnets, are provided adjacent the armature on opposite sides thereof, the magnets being positioned such that one magnet presents a north magnetic pole facing the armature and the other magnet presents a south magnetic pole facing the armature. A recieving plate is provided adjacent the free end of the valve element, the receiving plate having one or more channels formed therein for receiving fluid, and a bore for delivering fluid.

Abstract: A hydraulic pressure control valve, wherein a valve body having six oil grooves on its outer periphery at specified intervals is rotatably disposed in a cylindrical casing having six oil grooves on its inner periphery at specified intervals, and throttles are constructed on both sides of the respective oil grooves, thereby two throttling units each of which consisting of six throttles, are constructed and respective two throttles facing to each other in the radial direction among respective six throttles constructing respective throttling units have regions in which throttle areas do not substantially change until the relative angular displacement between the valve body and the casing reaches a predetermined magnitude.

Abstract: The present invention provides an apparatus for controlling the flow of a liquid supplied to a system applying a liquid to a substantially flat surface, the apparatus including a source of pressurized air, an enclosed tank containing a predetermined amount of liquid and connecting with the source of pressurized air through an air line, a pressure reducing valve arranged in the air line and adapted to control the pressure of air to be fed into the enclosed tank, a nozzle connecting with the liquid outlet of the enclosed tank through a liquid supply line and also coupling with the liquid applying system, a two-way valve disposed in the liquid supply line between the enclosed tank and the nozzle and adapted to intermittently blocking the flow of the liquid in the liquid supply line, and a restrictor disposed in the liquid supply line downstream of the two-way valve.

Abstract: A faucet having a single piece underbody comprising a unitary injection-molded structure is provided. A tubular waterway within the faucet underbody provides a leakproof path for water through the faucet to an outlet. Further, an injection molding procedure in which a tubular waterway is formed and in turn placed into a second mold, whereupon a second injection-molding is made, is provided. The procedure allows the formation of a unitary faucet underbody resistant to leakage and conducive to quick and inexpensive installation and replacement.

Abstract: A precision pressure regulator not only providing makeup pressure in response to a low pressure condition, but also for providing the ability to vent off excess pressure. A system in a self-contained unit is used, thereby eliminating a need for an external power supply such as battery, electrical, or mechanical power. The precision pressure regulator also provides extremely accurate control of pressure even in the low pressure ranges of less than 1 inch of water column, and does so without the need for constant supervision by a skilled technician. A safe inert atmosphere is provided for chemical processes utilizing volatile and/or contaminant sensitive substances.

Abstract: A hydraulic circuit includes a supply and exhaust valve provides a housing having a tapered passage and a tapered plug rotatable in the passage. The plug is biased into sealing engagement with the passage by a spring assembly acting on an inlet conduit providing a power fluid inlet. Rotation of the plug connects the inlet conduit to one of two housing ports to deliver power fluid to either the rod end or the cylinder end of a fluid motor to either retract and extend the piston rod. The plug also provides two additional independent fluid passages connecting other conduits leading to the motor and sump.

Abstract: A rotary valve (1) for hydraulic power steering of vehicles with arcuate slots (9,10) in the sleeve (2) and slots (11) in input-shaft (3) of the valve (1) where some of the slots (10) in the sleeve (2) are formed to provide hydraulic fluid return ports (13) axially of the valve (1) between the sleeve (2) and the input-shaft (3) while the axial extent of adjacent sleeve slots (10) and input-shaft slots (11) is the same at their ends remote from the return ports (13).

Abstract: This invention represents an improvement in a gas pressure regulator of the type comprising a body having an inlet, an outlet, a gas flow passage in the regulator body interconnecting the inlet and outlet, and a regulator mechanism in the valve body including a relief valve which is set to open when the pressure of the gas in the flow passage exceeds a predetermined pressure. The improvement comprises a valve seat in the gas flow passage immediately upstream from the outlet in the body of the regulator, and a check valve member in the gas flow passage disposed between the valve seat and the outlet in the body of the regulator, the check valve member being movable between an open position in which it is spaced from the valve seat to permit flow in downstream direction from the inlet to the outlet past the valve seat, and a closed position in which the check valve member prevents reverse flow in upstream direction past the valve seat.

Abstract: A pilot operated, balanced piston relief valve is provided with a body having a flow passageway therethrough and a main valve disposed therein, a pilot valve secured to the body and responsive to the pressure of fluid within the flow passage through the body, and a selective valve disposed between the body and the pilot valve for selectively discharging fluid from the body through a vent without requiring actuation of the pilot valve. In a preferred embodiment, the selective valve comprises an electrically actuatable cartridge valve secured within a manifold, with passageways formed through the manifold for providing fluid communication between the pilot valve, the main valve, and the vent.

Abstract: A method of rendering an existing pipeline flexible, by cutting out an intermediate portion of a pipe in a ring form, inserting a pipe joint into a cutout position, and connecting the pipe joint to the pipe. The pipe joint used in this method includes a plurality of sleeves interconnected in a fluid-tight condition to be oscillatable relative to one another. The pipe joint is inserted into the cut-out position and connected to the pipe, with the plurality of sleeves substantially fixed to one another while being interconnected in the fluid-tight condition to be oscillatable relative to one another. The sleeves are thereafter released from the fixed state.

Abstract: An improved mass flow controller can be connected to a passageway of a fluid, and can utilize a sensor unit for measuring a characteristic of the mass flow, and deriving a corresponding flow rate signal. Supplemental condition sensors can measure other parameters of the flow rate independent of their utilization in determining the actual flow rate, and can monitor and compare the current value of these sensor conditions, with standards to thereby monitor the operational performance of the mass flow controller.

Abstract: A housing for roof top refrigeration equipment has a metal frame supporting at least one compressor unit on a building roof. A pair of end panels and a roof panel are attached to the frame with the roof panel being leakproof to protect the equipment in the housing. A hinged access panel is attached to the frame and has a closed position and an open position and a pair of panel support members to hold the panel in an open position so that the side panel forms a roof canopy in the open position for sheltering a person working on the equipment in the housing. An electrical box is attached to the exterior of one of the end panels and has an access opening thereinto for rapid access to the power for the refrigeration equipment.