Abstract: A pressure compensated flow control valve including a body member having an axial bore extending to a closed end and a number of radially aligned ports formed near the closed end. A cylindrical spool is disposed within the axial bore and is movable between a controlled flow position where the spool extends over a portion of the radial ports and a reverse flow position where the radial ports are unobstructed. An orifice formed in an end plate of the spool is sized to allow a predetermined flow rate.

Abstract: A fuel dispensing nozzle for gasoline fuel pumping stations and the like has an inlet through which the fuel is supplied within a range of inlet pressures, an outlet from which fuel is discharged and a flow passage having valving for selectively opening communication between the inlet and the outlet in response to the pressure differential across the valving. The valving includes a housing within which a movable valve member is mounted, the valve member being actuated to open or partially close communication from an inlet of the housing to an outlet of the housing in response to the pressure differential across the valve member. As the pressure differential decreases above the pressure differential corresponding to the predetermined maximum rate, the valve member begins to close communication to prevent the flow from exceeding the predetermined maximum amount, and as the pressure differential increases communication is decreased so that the maximum predetermined flow rate is not exceeded.

Abstract: A remotely controllable fluid valve includes a solenoid-armature arrangement which functions as an electro-magnetic spring having improved force-displacement characteristics over a mechanical spring. The solenoid magnetizes a pair of axially spaced, sleevelike field poles. The armature is so shaped and initially positioned relative to the field poles that: as the armature, supported in one pole, moves further into the other pole, the axial magnetic force thereon decreases at a decreasing rate with the rate of decrease being greater at higher levels of solnoid energization.

Abstract: A flow regulator for water or other fluids has a housing with an internal shoulder between its inlet and outlet. The shoulder faces the inlet and slidably supports an elastically deformable annular flow restrictor which cooperates with a centrally located stud to define an annular passage extending from the inlet to the shoulder and followed by an annular portion of the channel between a conically diverging stepped or roughened internal surface of the housing and a stepped or roughened conical external surfaces of a guide member which carries the stud. Deformation, and hence the flow restricting action, of the flow restrictor depends upon the pressure differential which is established by the conveyed fluid.

Abstract: The clogging by impurities and the annoying noise caused by the rattling action of the internal parts of a fluids rate of flow saving or limiting device comprising a tubular fitting having an inlet end of larger diameter and an outlet end of smaller diameter with an internal shoulder formed therebetween, and a needle type shutter actuated by a spring concentrically arranged within said tubular fitting, are avoided by the improvement comprising a shutter formed by an upper larger diameter body and a lower smaller diameter body arranged concentrically within said fitting, a circular flange on the upper end of said upper body, a shoulder between said upper and lower bodies, said shoulder comprising a plurality of downwardly extending projections, at least one surface groove extending longitudinally of said upper body to permit free non-clogging passage of the fluid, and a soft material washer sandwiched between a pair of rigid washers supported on the internal shoulder of said fitting, said soft washer projectin

Abstract: In an automobile air conditioning system, an improved orifice type expansion device includes a movable piston which supports an orifice tube so that the piston is moved in response to higher than normal condenser pressure towards a stationary plug member so that the resistance to flow is increased and thus a desirable low evaporator pressure and temperature is maintained.

Abstract: The problem of controlling overspeed and/or oscillation of a variable displacement hydromechanical actuation system is solved by a multi-stage flow regulating valve (18) which includes a valve body (20, 22) having a fluid inlet (24) and a fluid outlet (26) defining a flow path (A,B) through the valve body. A first stage valve piston (30) is reciprocally mounted within a cylinder (28) in the valve body (20) in the flow path between the inlet and the outlet for restricting fluid flow in response to a first range of incoming fluid pressure. The first stage piston (30) has an inlet orifice (34) exposed to the incoming fluid and an outlet port (36) in registry with the outlet (26) of the valve body (20). A second stage valve piston (44) is reciprocally mounted within the first stage piston (30) and has an orifice plate (46) for covering the inlet orifice (34) of the first stage valve piston (30). The orifice plate has smaller orifices (48) for further restricting fluid flow through the valve body.

Abstract: Improved flow control valves are disclosed which are exceedingly accurate in maintaining a constant predetermined flow rate regardless of inlet and outlet pressures. The valves are preferably designed to enable them to be fabricated almost entirely from suitable polymeric composition materials. One embodiment disclosed is extremely well suited for ultra-pure applications which require extreme care to avoid any possible contamination of the liquid flowing therethrough. Another embodiment is disclosed which is designed to achieve substantially zero leakage flow thereby rendering it particularly well suited for use in applications requiring exceedingly precise flow control and in particular relatively low flow rate applicatins wherein leakage flow is of greater significance.

Abstract: A proportional priority flow regulator valve structure comprising a cartridge-type modulated orifice valve element (MOS) in a composite multiple element valve assembly. The MOS valve operates in an hydraulic circuit to receive pressurized fluid from a source of supply and responds to variations in fluid pressure and fluid flow rates acting hydraulically on a pair of inter-dependent spring-biased spools of the valve to provide a modulated orifice for delivery of a controlled fluid flow.

Abstract: To divert sufficient fluid flow through an unsealed bearing section of a downhole drilling motor, a flow control apparatus is provided for insertion between the power section of the motor and the bottom of a drill bit which is to be turned by the motor. The flow control apparatus includes a variable flow channel having a selectable effective cross-sectional area preferably embodied by a valve. A selected effective cross-sectional area is chosen by a control mechanism, such as a snap ring or a spring used to control the position of a valve member of the valve in response to different flow rates of fluid pumped through the valve depending upon whether the drill bit is on-bottom or off-bottom. In one embodiment the apparatus is incorporated within the interior of a drill bit which has angled flow channels to direct flushing fluid flow to side wall locations where reaming occurs. Flow through these outlets is controlled by positioning of the valve member.

Abstract: A constant flow rate controller valve includes a piston spring biased towards the top of the valve. Fluid or gas flowing into the valve increases the pressure in the chamber above the piston, forcing the piston toward a valve seat. A pin type valve stem is thus seated in the valve seat, blocking gas or fluid flow to the outlet port. The pressure in the chamber below the piston builds until the pressure in this chamber plus the piston spring force is greater than the pressure in the chamber above the piston. The piston then lifts the valve stem from the valve seat, and the pathway to the outlet orifice is opened. Fluid or gas flows through the piston via the caibrated orifice. An equilibrium flow rate is reached by variation in the piston position based on the interaction of the above gas or fluid pressures and spring force.

Abstract: A control valve for controlling the flow of a liquid, especially liquid of hydraulic damping unit with a hydraulic piston-and-cylinder arrangement, has a pressure chamber defined by lamellae extending along generatrices of a cylindrical housing wall and an end wall juxtaposed with this cylindrical wall. Since the lamellae are flexible, when there is a pressure increase in the chamber, the lamellae are deflected outwardly to reduce the free cross section of the throttle gap.

Abstract: A pressure compensating flow control device for conserving water usage by controlling the water flow rate from faucets located in homes and commercial properties. The device is an inline flow control apparatus which controls the flow of water going to sinks, showers, and lavatories in a manner to conserve water usage and is therefore especially energy efficient when used to control the flow of heated water. The control device is pressure compensating in a manner which tends to provide a constant volumetric flow rate as the upstream pressure fluctuates, and as the faucet is progressively opened. The control device includes a housing within which two mutually reciprocating parts are biased apart by a spring means so that as the upstream pressure increases, the two parts move towards one another, thereby compressing the spring means therebetween, and increasing the friction to flow therethrough.

Abstract: A device for use as a safety device to cut off the water supply to a house or building in the event of overly high water consumption due to a leak or break in the plumbing in the house or building is disclosed which has only three moving parts and is of simple and inexpensive to manufacture construction. The safety flow control device of the present invention has a three position selector valve which selectively either allows water to flow freely through the safety flow control device as if it were not there, diverts water through a safety flow chamber, or acts as a shutoff valve by preventing the flow of water into the main water line entrance of the house or building.

Abstract: An adjustable flow regulating valve has a flexible apertured diaphragm which coacts with a fixed conical needle to provide a gradually variable effective flow controlling orifice area to compensate for changes in a supply fluid pressure. As the supply fluid pressure changes, the aperture of the flexible diaphragm moves relative to the apex of the needle to reduce or increase the effective orifice area which determines the regulative flow rate. The position of the diaphragm aperture relative to the needle is manually adjustable by rotating an adjustment collar on the valve housing to vary the amount of movement of the diaphragm required to engage the aperture with the valve needle. The diaphragm may also be carried by a spring balanced inner sleeve which allows relative sliding movement between the flexible diaphragm and the needle. The amount of force required for engagement is determined by the strength of compression springs at each end of the sliding sleeve set by the adjustment collar.

Abstract: A fluid flow regulator in which the fluid flow therethrough is restricted twice, first through a fixed orifice in a slidable piston and then through a variable flow restrictor which is a spring. This spring is axially aligned with and bears against the piston, and fluids issuing from the orifice empties into the interior of the spring, the end of the spring opposite the piston being closed. Fluids thus flow from within the spring through the gaps between its coils and into a chamber surrounding the spring, and from there exits through the outlet of the regulator. The gaps between the spring coils are quite narrow and cause the flow of fluids to be restricted this second time. This restriction is variable since the piston moves as the differential pressure thereacross varies which causes the length of the spring to vary accordingly. This in turn varies the size of the gaps. In this manner, the regulator compensates automatically to provide a fluid flow rate which is substantially constant.

Abstract: The flow-rate control device (10), which is arranged in a branch line (6), comprises a slide (19) forming, together with an outlet channel, a variable constriction (.sigma..sub.1), the slide being biased by a spring, one end of which bears against the end of an actuating rod (30) biased by a piston (21) actuated by a speed-reducing servo-drive unit (22) controlled by an electrical signal (11) dependent on a significant parameter, for example the speed of a vehicle for power-assisted steering of the vehicle. The rod (30) further controls an internal bypass passage (33, 34) parallel to the variable constriction (.sigma..sub.1).

Abstract: A gas fuel torch assembly is provided for attachement to a portable pressurized gas fuel cylinder. The assembly includes a housing and a gas delivery system in the housing. The system delivers gas fuel from the cylinder within an adjustable operating pressure range to a burn tube connected to the housing. The gas delivery system includes a gas passageway, an on/off valve and a pressure regulator valve assembly. The pressure regulator valve assembly includes a regulator body slidably received in the housing and an adjustable regulator valve stem. A metering orifice provided in the gas passageway of the regulator body defines a maximum pressure at which gas fuel is fed into the burn tube. Both the on/off valve and regulator valve include spring biased resilient ball members loosely held within enlarged valve chambers.

Abstract: A constant air flow rate valve with changing cross-section, and having a throttling member disposed within a passage of changing cross-section, the throttling member changing shape depending upon differential pressure across the passage section. The throttling member is also disposed to be displaceable in a direction of a central axis of the passage section, for imposing a set-point value of flow rate. A procedure for controlling the constant air flow rate valve is also provided.

Abstract: A flow control valve for use in dispensing fuel or other fluid and which can be facilely installed in the inlet end of an automatic fuel dispensing nozzle. This flow control valve does not incorporate a valve seat, for its piston like valve, and pressure compensation is controlled by the valve and includes a sleeve incorporating a slidable piston therein, a fluid outlet port is provided at one end of the sleeve, and which is capable of being partially closed by the slide of the piston therein, under fluid pressure conditions, to thereby create a pressure drop that eventually forces the piston into the sleeve and to close off the sleeve port openings in order to reduce fluid flow, during a dispensing function.

Abstract: The flow-rate control device (10), which is arranged in a branch line (6), comprises a slide (19) forming, together with an outlet channel, a variable constriction (.nu..sub.1), the slide being biased by a spring, one end of which bears against the end of an acutating rod (30) biased by a piston (21) actuated by a speed-reducing servo-drive unit (22) controlled by an electrical signal (11) dependent on a significant parameter, for example the speed of a vehicle for power-assisted steering of the vehicle. The rod (30) further controls an internal bypass passage (33, 34) parallel to the variable constriction (.nu..sub.1).

Abstract: A two-stage flow controller for use in a vehicle heating circuit including a housing defining an inlet and an outlet and a flow control chamber disposed between the inlet and outlet. A spring biased flow controller is disposed for sliding movement within the chamber towards and away from a valve seat. The flow controller includes an annular segment defining a through aperture and a plurality of axially extending legs which support the segment for sliding movement within the chamber and in predetermined alignment with the valve seat. Projections are defined on a face of the annular segment. When the fluid flow exceeds a predetermined level, the projections initially engage a valve seat surface such that a variable orifice is formed by clearance regions between a confronting face of the element and the seat. The element deforms to diminish the clearance space between the face and the seat as a function of fluid flow rate.

Abstract: A flow-regulated drip emitter, including a housing provided with an inlet connector connectable into a relatively high-pressure liquid-line and an outlet opening, a flexible diaphragm retained along a peripheral portion thereof in the housing and dividing the interior of the housing into an inlet chamber and an outlet chamber, a flow-regulating valve comprised of a valve head accessible to the high pressure and a valve stem one end of which is attached to the valve head. The emitter further includes at least one flow-attenuating element disposed in the path of the liquid flowing from the inlet chamber into the outlet chamber, a valve seat associated with the valve head and located in a high-pressure region upstream of the inlet chamber, the valve seat and the valve head defining between them a gap through which the liquid passes on its way from the high-pressure line into the inlet chamber.

Abstract: Flow regulator valves that adjust to various fluid flow line pressure variations to stabilize flow to designed regulated flow rates in various flow line sizes and with fluid pressure build up in the line encountered such as with water hammer are combined with through flow relief valving to diffuse excessive line pressures. This includes the addition of a relief valve, of any of several configurations, to a flow regulating valve, in several configurations with the relief valve opening to relieve higher than flow regulating valve design working pressures.

Abstract: An automatic recirculation valve is disclosed which utilizes three valve elements to accomplish particularly smooth and nondisruptive switching of fluid flow between main fluid flow and recirculation fluid flow. A unique back pressure control valve provides close control over changes in fluid pressure relative to fluid flow rate and functions to suppress erosion and cavitation of the bypass valve.

Abstract: An implantable valve for controlling the passage of cerebrospinal fluid (CSF) from a ventricle of the brain to a suitable drainage location in the body includes a movable diaphragm responsive to pressure differentials between the ventricle and the drainage location. When the pressure differential is below a minimum threshold level, the valve is closed and CSF flow is prevented. When the pressure differential increases beyond the minimum threshold, the valve operates in a constant pressure mode to maintain a first predetermined CSF pressure differential across the valve. When the differential pressure increases beyond an intermediate threshold level, the valve operates in a constant flow mode to maintain a desired constant CSF flow rate through the valve. When the pressure differential increases beyond a maximum threshold level, the valve operates in a constant pressure mode to maintain a second predetermined CSF pressure differential across the valve.

Abstract: An implantable valve for allowing the passage of cerebrospinal fluid (CSF) from a ventricle of the brain to a suitable drainage location in the body includes a movable diaphragm, one side of which is in pressure communication with the drainage location of the body and the other side of which is in pressure communication with the ventricular spaces of the brain. A valve assembly, actuable by displacement of the diaphragm in response to a pressure differential applied thereto, regulates passage of CSF from the ventricular spaces to the drainage location. When differential pressure is relatively small, the valve is actuated to a constant pressure mode in which a predetermined differential pressure across the valve is maintained. In response to a sudden increase in differentail pressure, the valve mechanism is actuated to a constant flow mode in which a desired relatively constant rate of fluid flow is maintained.

Abstract: A flow regulating device for gravity infusion and transfusion of fluids comprises upper and lower housing parts which include inflow and outflow channels respectively. A continuously adjustable valve is connected between the inflow and outflow channels. The outflow channel has an outlet opening which defines a valve seat and a membrane extends across the outlet opening and is movable toward and away from the outlet opening depending on pressure appearing on opposite sides of the membrane. In this way extraneous pressures, such as patient venous pressure, can be compensated for by the membrane to maintain a substantially constant flow of fluid once the valve is set.

Abstract: In accordance with the present invention, a constant flow rate control valve is provided including a cup member disposed in the flow passage through the valve. The cup member has a port located in an end wall of the cup member and a plurality of ports in the sidewall of the cup member. The cup member is movable axially within the valve, with such movement being opposed by a resilient spring member downstream of the cup member. A fixed shear ring in the valve body surrounding the sidewall of the cup member blocks or exposes areas of the sidewall ports in response to movement of the cup member. Fluid pressure acting on the end wall of the cup member urges the cup member against the spring, so that the shear member exposes only that sidewall port area appropriate to the pressure being exerted. The sidewall ports have non-identical shapes and areas, with one or more longer sidewall ports extending further toward the end wall of the cup member than the other, shorter sidewall ports.

Abstract: A flow control valve which exhibits a so-called drooping response is provided which causes the flow rate supplied to a hydraulic instrument to be reduced as a discharge flow from a pump increases. A union is inserted into and fixedly connected to a bore which receives a spool valve, and is formed with an orifice. A sleeve having an outer diameter which varies in its axial direction is fitted around the union, thereby defining a restricted passage on the outside of the sleeve which restricts the passage of a hydraulic fluid. A pressure differential between the upstream and the downstream side of the restricted passage is effective to slide the sleeve, thereby reducing the opening of the orifice to reduce the flow rate supplied to the hydraulic instrument in a gradual manner.

Abstract: An implantable valve for controlling the passage of cerebrospinal fluid (CSF) from a ventricle of the brain to a suitable drainage location in the body includes a movable diaphragm, one side of which is in the pressure communication with the drainage location of the body, and the other side of which is in pressure communication with the ventricular spaces of the brain. A valve assembly, actuable by displacement of the diaphragm in response to applied pressure differentials, regulates passage of CSF from the ventricular spaces to the drainage location. When the pressure differential falls below a minimum threshold level, the valve is closed to prevent fluid flow. When the pressure differential increases beyond the threshold, the valve operates in a constant pressure mode to maintain a first predetermined pressure differential across the valve.

Abstract: A speed control valve is formed with a pair of cooperating inversely operating dashpots to control movement of a valve element in either direction so as to prevent sudden actuation upon change in fluid velocity or oscillation due to fluid flow changes. Bleeding of fluid into and out of the dashpots controls the speed of movement of the valve element.

Abstract: A flow regulator is disclosed having a body with a central bore and a dished shaped surface with a tapered groove from the bore to the periphery, a diaphragm is fastened to the periphery of the body with a passage extending around the periphery providing fluid communication between the upstream side of the diaphragm and the tapered groove, a spring is provided to bias the diaphragm towards the upstream side, the diaphragm is inelastically deformable against the dish shaped surface solely in accordance with the resistance to deformation of the spring and the fluid pressure on the upstream side of diaphragm to regulate the volume flow of fluid through the central bore.

Abstract: An implantable valve for controlling the passage of cerebrospinal fluid (CSF) from a ventricle of the brain to a suitable drainage location in the body includes a movable diaphragm which positions a valve seat in response to the pressure differential between the inlet and outlet of the valve. The valve seat defines a fluid orifice. An improved valve stem, preferably of one-piece construction, and provided with a series of cooperating diverging and converging frusto-conical portions, extends through the orifice to provide four stages or conditions of fluid flow and pressure control in response to relative movement between the valve seat and stem. In a first stage or condition of operation of the valve, wherein the fluid pressure differential falls below a threshold level, fluid flow is prevented. In a second stage, sufficient fluid flow is permitted to maintain a first substantially constant predetermined differential pressure.

Abstract: An implantable valve for controlling the passage of cerebrospinal fluid (CSF) from a ventricle of the brain to a suitable drainage location in the body includes a movable diaphragm, one side of which is in pressure communication with the drainage location of the body and the other side of which is in pressure communication with the ventricular spaces of the brain. The diaphragm includes a flexible valve seat which moves relative to a valve closure means and a fluid flow control means in response to applied pressure differentials, thus regulating passage of CSF from the ventricular spaces to the drainage location. When the pressure differential is relatively small, the valve operates in a constant pressure mode to maintain a predetermined pressure differential across the valve. In response to a sudden increase in differential pressure, the valve operates in a constant flow mode to maintain a desired relatively constant CSF flow rate through the valve.

Abstract: In a branch hydraulic line (6.sub.a, 6.sub.b) upstream of the distribution servovalve (1) of the assisted steering system, a valve mechanism with electromagnetic control (10) is situated, which comprises a valve member biased by an electromagnetic actuator (16) having two states, energized and unenergized, which is controlled by a switch (20.sub.a, 20.sub.b) actuable by the lever (21) of the gear changing mechanism of the vehicle so as to close the branch line (6.sub.a, 6.sub.b) during engagement of the parking gears (first and reverse) and thus to obtain maximum hydraulic assistance power, the assistance power being reduced during other conditions of use (driving along the road) of the vehicle.

Abstract: A control valve for automatically maintaining a constant rate of flow of a fluid through a pipeline includes a housing having therethrough a passage including an inlet opening and an outlet smaller than the inlet opening. An orifice plate is positioned within the passage adjacent the outlet opening, the orifice plate having therethrough an orifice. A regulating diaphragm is positioned within the passage at a location upstream of the orifice plate. The regulating diaphragm has therethrough circumferential ports and a central opening smaller than the orifice.

Abstract: A flow control valve which exhibits a drooping response, namely, having a response which causes the flow rate supplied to a hydraulic instrument to be reduced as the discharge flow from a pump increases is disclosed. A spool valve is received in a bore, in which a union is disposed and secured. An orifice is formed in the union, and a sleeve is fitted around the union. A restriction which limits the passage of hydraulic fluid therethrough is formed on the external surface of the sleeve. A pressure differential between the upstream and the downstream side of the restriction is effective to cause a sliding movement of the sleeve to thereby reduce the area of the orifice, thus gradually decreasing the flow rate supplied to the hydraulic instrument.

Abstract: An implantable valve for allowing the passage of cerebrospinal fluid (CSF) form a ventricle of the brain to a suitable drainage location in the body includes a plurality of fluid flow pressure differential responsive valves arranged in parallel relationship and having common inlet and outlet means, a portion of said inlet and outlet means imparting fluid flow restriction to the system in conjunction with the operation of at least one of said valves, the system being in pressure communication with the drainage location of the body and the ventricular spaces of the brain. When the pressure differential is relatively small, the system operates in a constant pressure mode to maintain a first predetermined pressure differential across the system. In response to a sudden increase in differential pressure, the system operates in a constant flow mode to maintain a desired relatively constant CSF flow rate through the system.

Abstract: A flow regulating cartridge assembly that can be adjusted from substantially zero flow to a predetermined maximum flow determined by the maximum size of a flow controlling orifice located within the valve assembly. The valve includes a spool slidably mounted within a step bore located in the valve body which is operative to control the fluid communication between an inlet port and a bypass port. The spool includes an adjustable orifice for adjusting a regulated fluid flow through a regulated port. The spool member threadedly carries an adjustment stem which includes a tapered end that is adapted to move into and out of the orifice to adjust its effective orifice size. A coupling member including an adjustment segment extending externally of the valve body includes a coupling arrangement which allows relative axial movement between the adjustment stem and the coupling member but prevents relative rotation.

Abstract: A regulator having turbulence generating device for controlling thrust. A differential piston (2) is biased by a spring (3) located in a discharge channel (8a) of a medium under pressure. The spring (3) is weighted in such a way that it is compressed at a given pressure within the container so that the differential piston (2) takes a first end position and decreases the opening of the discharge channel (8a) to a minimum. The spring (3) expands proportionally to the pressure drop due to the discharge of the medium (18) from the container and shifts the piston (2) so that the opening of the discharge channel (8a) increases gradually until the piston (2) has reached a second end position as soon as a given minimum pressure has been reached in the container.

Abstract: A liquid flow controller suitable for a liquid containing numerous solid particles has a casing in which a valve body is slidably accommodated. Between the inner surface of the casing and the outer surface of the valve body is provided a wide space by forming some sliding projections. Furthermore, at least one flexible closing member is provided between the casing and the valve body. This construction enables the valve body to move smoothly without jamming of the solid particles in the liquid in the space.

Abstract: A constant airflow control apparatus is connected to an air duct of an air conditioning system to keep the flow rate of air fed from the air duct constant. The apparatus comprises a rectangular pressure receiving plate slidably mounted on a guide shaft extending in one direction inside a passage of a housing. The plate extends substantially at right angles to the central axis of the housing so as to block part of the cross section of the passage. The apparatus further comprises a coil spring for urging the plate against the flow of the air, and two swinging plates swingably attached to two opposite side edges of the pressure receiving plate, individually. The swinging plates are adapted to change the cross-section area of an air passage defined between the swinging plates and the inner surface of the housing in a mode represented by a quadratic curve in accordance with a rectilinear change of the pressure of the air.

Abstract: In accordance with the invention, a full opening check valve is provided which will close in response sustained high velocity flow through the valve. In one embodiment, a downhole blowout preventer is provided having a rigid outer sleeve which may be interspaced within a casing string near its lower end for insertion into a bore hole. The downhole blowout preventer has an inner sleeve including an upwardly longitudinally collapsible tube within the outer sleeve. The tube may be composed primarily of rubber or the like. The inner sleeve includes a surface for developing an upwardly acting collapsing force responsive to the upward flow of well fluids through the blowout preventer.

Abstract: A fluid flow regulating device comprising a housing defining an inlet, an outlet orifice, and a fluid flow passage therein between the inlet and the outlet orifice, a movable piston in the housing having an upstream surface and a downstream surface exposed to fluid flowing through the passage, means for providing a drop in pressure between the upstream surface and the downstream surface as a function of fluid flow rate through the device, and a closure member that is connected to the movable piston and has an externally curved surface that is movable between positions adjacent to and in front of the outlet orifice as the piston moves in response to changes in the magnitude of the drop in pressure.

Abstract: Forms of a reaction control valve are disclosed utilizing various control signals with linear and rotary displacement structures to balance flow reaction forces and attain desired signal-responsive positioning. Different flow passage configurations attain different degrees of damping. An embodiment of the valve functions as a flow proportioner.

Abstract: A playground unit having a rotatable horizontally disposed deck adapted to support at least one passenger is provided with a control device operatively connected to the deck to limit the rotational speed thereof. The control device is a hydraulic governor comprising a fluid reservoir, a pump, and a valve with interconnecting fluid lines and check valves providing appropriate directional flow of fluid between the reservoir, pump and valve. The valve automatically moves between an open and closed position depending upon the rotational speed of the unit. The force required to maintain the rotational speed of the playground unit is much greater when the valve is closed as compared to when the valve is open.

Abstract: The rate at which a flow control valve maintains flow under varying pressures can be adjusted by positioning a resilient flow control washer on a valve seat and engaging the opposite surface of the washer with an adjustable member which can be moved toward and away from the valve seat to compress the washer in varying amounts and thereby alter the value at which the washer maintains a constant flow.

Abstract: A constant flow valve includes a valve body having an inlet portion, an outlet portion and a main valve body portion, the inlet portion and the outlet portion being connectable within the run of a fluid pipe line. The main valve body portion is interposed between the inlet portion and the outlet portion and has an open end, a cap member on the open end, and valve means disposed in the main valve body portion for maintaining a constant flow rate through the valve body means regardless of pressure differential between the inlet portion and the outlet portion.

Abstract: A flow regulator comprises a sleeve fixed within a body member and formed with an opening serving as a metering passageway, a second sleeve displaceable with respect to the fixed sleeve so as to vary the effective size of the metering passageway, a spring biasing the displaceable sleeve in the direction to enlarge the met metering passageway, and a flow sensor element carried by the displaceable sleeve and impinged by the flowing fluid so as to displace the second sleeve in the direction of restricting the metering passageway. Also described is a spray nozzle including the above flow regulator, and a deflector floatingly mounted so as to be impinged by the jet issuing from the spray nozzle.