Abstract: A unit for a single-lever mixing valve, includes a fixed housing defining an upper region, and a bottom, inlet region. An inner sleeve is located within the fixed housing. A cage is located within the fixed housing and adjacent to the inner sleeve. The cage is rotatable and radially displaceable relative to the housing. A spindle is swively mounted obliquely inside the inner sleeve, and engages the cage. The spindle is actuated externally relative to the fixed housing. A plurality of flat, superposed washers are provided. Each washer has at least one opening therethrough. One of the washers is an inlet valve attached to the fixed housing. Another of the washers is a distributor, temperature valve attached to the cage. Another of the washers is a volume valve forming a shim fitted between the inlet valve and the temperature valve. The volume valve and the cage are together radially displaceable on the inlet valve relative to the fixed housing.

Abstract: An actuator for fluid control valves with a reversible power module having a stationary inner member and a coaxially aligned movable outer member coupled to the valve flow control element and slidably movable on the inner member. A chamber is formed between respective ends of the members. Pneumatic pressure applied to the chamber drives the movable member to actuate the valve in a first direction. A spring returns the movable member in the second direction. A second chamber is defined within the inner member and pneumatic pressure applied to the second chamber drives the movable member with or without the spring.

Abstract: A mixing valve (10) has a limiting mechanism (26) for controlling the maximum flow rate and maximum temperature mix of the mixed water. The limiting mechanism (26) includes a rotatable plate member (70) retains on a cap assembly (56) by a positioning ring member (82). The plate member (70) has a slot (74) that receives a control stem (22) of valve element (20). A handle (90) has a leg section (96) that fits onto control stem (22) and has a cross-sectional shape that prevents the handle from rotating about the control stem axis. The positioning ring has a projection (88) that limits the rotation of the plate member (70) to define a maximum temperature mix of the discharged water through outlet port (30) of the mixing valve (10).

Abstract: The present invention is a faucet which can be opened to a user settable degree, thus allowing a user to set the water temperature. The faucet knob has an internal cavity which houses a left-hand threaded sleeve. As the faucet knob is turned counter-clockwise, a threaded stop collar, which matingly engages the threaded sleeve, is drawn up within the faucet knob cavity until the collar encounters a setscrew. The setscrew prevents further movement of the stop collar along the threaded sleeve, thus preventing further turning of the knob. The surface, of the stop collar, which contacts the setscrew can be provided with resilient ramps which allow further adjustment of the knob position by an adult user, and raised flats or steps which completely prevent any further turning of the knob once the stop collar reaches the setscrew. More than one setscrew can be provided to accommodate the water temperature preferences of different users.

Abstract: A variable valve timing mechanism for controlling at least one biased valve comprising a guide assembly having a mounting surface and a spaced apart upper guide surface. The guide assembly includes spaced apart longitudinal guides; a closing stop positioned on the mounting surface and a stop surface. An opening stop is positioned on the guide assembly and has a stop surface. A valve activator is movably positioned within the guide assembly and in operable contact with the biased valve. The valve activator has first and second stop surfaces to contact a respective closing stop and opening stop, and includes an angled contact surface. A drive ram is movably positioned within said guide assembly and in contact with the upper guide surface and the valve activator. The drive ram has an angled drive surface positioned for contacting the valve activator and is connected to a drive for imparting reciprocating motion thereto. The drive is synchronized with the operation of the valve.

Abstract: A valve assembly is disclosed which comprises a screw spindle threadingly mounted to a valve housing and having a tap handle secured to a first end and a valve disc located at a second end, and wherein rotation of the spindle causes the valve assembly to move between an open and a closed position. The valve assembly further incorporates an indicator arranged to indicate a predetermined degree of rotation of the spindle from the closed position.

Abstract: A micro-valve assembly for providing precise regulation of fluid flow between an input port and an output port comprises a valve body configured to installed with the valve assembly and forming therewith a fluid flow chamber between the fluid flow rate control port and the output port, the valve body having an internally threaded cylindrical portion. A rotatable valve adjustment member has an externally threaded cylindrical portion sized to engage the internally threaded cylindrical portion of the valve body. The externally threaded cylindrical portion of the rotatable valve adjustment member has an internally threaded axial bore. The internally threaded bore of the rotatable valve adjustment member has a longitudinal axis and a pitch finer than that of the externally threaded cylindrical portion thereof.

Abstract: A variable flow rate expansion valve designed for in-line installation in a fluid conveying conduit such as between the high pressure condenser and lower pressure evaporator of a refrigeration system includes an integrally defined restrictor disc and a closure disc for controlling the flow of fluid through the valve. The restrictor disc has a first set of flow apertures and the closure disc a second set of flow apertures. The closure disc is rotatably coupled to the restrictor device in a plane parallel to the plane of the restrictor disc and perpendicular to refrigerant flow. A stepper motor is coupled to the closure disc through a linear actuator. Movement of the linear actuator causes the closure disc to rotate relative to the restrictor disc such that the flow apertures of the closure disc are selectively brought into and out of registry with the apertures of the restrictor disc.

Abstract: A multiple flow rate fluid control valve assembly in which the mode of fluid flow is interfaced with the rate of fluid flow has a mode control valve having a switch for selectively setting the valve to either of a continuous fluid flow mode or a pulse fluid flow mode. A fluid flow rate control valve is connected to the mode control valve for selectively controlling the rate of fluid flow from a source of fluid through the rate control valve to the mode control valve, to thereby provide fluid from the source of fluid to the mode control valve at a rate which is appropriate for the mode of fluid delivery and the particular fluid use.

Abstract: A fluid pressure regulator capable of adjustably setting a cut-off pressure between an upper and a lower limit having a two-piece valve body where the two pieces are threadably joined such that adjusting the distance between the two pieces of the valve body moves a piston stem valve operating a high pressure port towards or away from the high pressure port while not changing the distance between the spring engaging the piston and the piston head.

Abstract: The flow control for fluid circuits having dual power outlets includes a housing having an interior compartment with the compartment having an interior surface, center portion and first and second ends. The compartment has a maximum cross-sectional area at its center portion uniformly decreasing in area towards the first and second ends. First and second outlet fluid ports are located in the housing adjacent the first and second ends. A pressure fluid inlet port is located in the housing at the center portion thereof. A flow control element is mounted for longitudinal movement in the interior compartment and has an outer surface symmetrical in shape to that of the compartment, but has a smaller diameter wherein a fluid flow space exists between the outer surface of the control element and the interior surface of the compartment.

Abstract: Measuring and regulating valve assembly which includes a butterfly valve and a measuring flange, the measuring flange being situated upstream of the butterfly valve, the distance between the valve and the measuring flange being at least 0.6.times. the nominal passageway diameter, the assembly including a control box that has an adjustable stop that may contact a cam of a sleeve connected to an operating means whereby the maximum opening angle of the butterfly valve can be restricted in a reproducible manner, the sleeve being connected to the valve shaft.

Abstract: A slow vent valve for semiconductor wafer manufacturing equipment is disclosed, which generates a gentle flow of nitrogen gas to the vacuum chamber enough to maintain an undisturbed ambient environment for the wafer being processed in the chamber, protecting the product from disturbed by particulate raised or objectionable ambient stirring caused by the entering gas. The valve includes an adjustable cam mechanism including a valve open timing adjuster and a slow-venting adjuster. The valve open timing adjuster changes the initial diaphragm pressing force on the valve seat, to thereby determine the open speed and the open timing of the valve to take a lift off the valve seat. The slow venting adjuster is provided to adjust the resistance of a spring that exerts downward pressure on a second piston integrated with the valve rod, to thereby slow the slightly upward movement of the rod to operate the diaphragm to permit a slowed flow of nitrogen gas to the vacuum chamber.

Abstract: A valve assembly includes a housing having at least one valve orifice for fluid flow therethrough, and a valve member which moves between a fully closed position and a fully open position, respectively, closing and opening said valve orifice. The valve orifice has a clearance surface forming an auxiliary valve passageway selectively enabling flow communication therethrough in an intermediate position of the valve member between said fully open and fully closed positions, and in the intermediate position the valve member partially obstructs the valve orifice so that the passageway provides attenuated fluid flow communication through the valve orifice relative to fluid flow communication in the fully open position of the valve member. A manually controlled actuator enables limited displacement of the valve member between the fully closed position and the intermediate position for the attenuated flow communication through the valve orifice.

Abstract: Flow-rate limiting device in a single-control mixer cartridge for hot and cold water including a body associated with a bottom for containing a fixed plate and a movable plate coupled with an actuation lever pivoted on a rotating coupling; the flow-rate limiting device includes a bush suitable to be associated with the lever and having a plurality of protrusions of different thicknesses which are adapted to selectively constitute an element for contrast against the stroke limiter of the lever which corresponds to the maximum flow-rate position.

Abstract: A device for controlling the rotation of a valve and/or valve actuator, such device including a housing secured to said valve and actuator, hub member rotatably received by said housing, at least one stop member receiving device provided said housing, and at least one stop member engageable surface provided said hub.

Abstract: A servo valve comprising a drive for moving a valve spindle (6) coupled through a lever and a link body with the drive. The lever (34) is pivotably mounted in a lever housing (30) which is connected at one end to the valve housing (2) and at its other end to a housing (54) of the drive, and a position controller (114) is disposed on the lever housing (30). The servo valve has a compact and enclosed design and can be economically manufactured and assembled.

Abstract: In a valve mechanism for controlling oil pressure in an oil path (13) connecting between a hydraulic pump (11) and motor (12) of a hydrostatic transmission (10), a differential piston (23) serving as a relief valve member for gradually increasing the oil pressure has a larger pressure-applied surface area at the side opposite to the oil path than at the side of this path. A throttled oil passage (24) is provided for conducting oil pressure in the path to the larger surface area. The piston is biased by a valve spring (25) through a control piston (26). A receiving member (27) for the spring and a stopper member (28) for the control piston are provided such that they are adjustable in position independently of each other. By this, the manner of increasing the oil pressure may be adjusted in a large variety. The valve mechanism also serves as a relief valve for excluding a possible, excessively high pressure.

Abstract: A stop assembly for a valve is disclosed. Two stop rings are interfitted by meshing teeth and driven by a valve stem. In one embodiment, an escutcheon provides a mounting for one of the ring members as well as a stop surface for contact with both rings. The stop assembly provides a stop for maximum rotation of a valve member, as well as an adjustable temperature stop function.

Abstract: A valve assembly includes a housing having at least one valve orifice for fluid flow therethrough, and a valve member which moves between a fully closed position and a fully open position, respectively, closing and opening said valve orifice. The valve orifice has a clearance surface forming an auxiliary valve passageway selectively enabling flow communication therethrough in an intermediate position of the valve member between said fully open and fully closed positions, and in the intermediate position the valve member partially obstructs the valve orifice so that the passageway provides attenuated fluid flow communication through the valve orifice relative to fluid flow communication in the fully open position of the valve member. A manually controlled actuator enables limited displacement of the valve member between the fully closed position and the intermediate position for the attenuated flow communication through the valve orifice.

Abstract: An apparatus for limiting the rotational travel of a shaft of a valve actuator. A shaft engaging element having detents disposed therewith is connected to the shaft. A stop element is coupled to the actuator. When the shaft engaging element rotates with the shaft, the detents cooperate with the stop such that after a predetermined degree of rotational travel of the shaft the detents limit the travel of the shaft such that the resultant force balance of the shaft engaging element and thus the shaft is substantially zero.

Abstract: An automatic selector device for multi-gear change-speed gearbox includes a multi-way valve which can be driven into several valve positions each associated with one gear by a stepper motor whose operation depends on an electronic control unit. Each of the valve positions causes the appropriate gear to be selected. The multi-way valve is connected kinematically to a selector unit which can be actuated manually in order to block gears through the intermediary of a stop and an opposing stop.

Abstract: A sensor-activated, battery-powered toilet room flush valve has a body with an inlet and an outlet. There is a valve seat in the body and a diaphragm which closes upon the seat to control flow between the inlet and the outlet. A cover mounted on the body defines a pressure chamber with the diaphragm and there are a sensor, solenoid and battery mounted on the cover and connected for operation of the flush valve. There is a passage in the cover connecting the pressure chamber and the outlet. Operation of the solenoid opens the passage to relieve pressure in the chamber to the outlet whereby the diaphragm moves off its seat to open communication between the inlet and outlet. A stop is positioned within the chamber and attached to the diaphragm to limit its movement toward the cover, which in turn controls the volume of water passing through the flush valve prior to closure of the diaphragm upon its valve seat. The stop is adjustable from the outlet side of the valve.

Abstract: A valve extension actuator subassembly for rotating an extending valve stem of an HVAC valve, having a rotational, polymeric, cylindrical, hollow projection body extending on a central axis coaxial with the valve stem, having an inner end and an outer end, and defining a central space therein, a transverse polymeric handle on the outer end of the projection body, a metal valve plate at said inner end of the projection body, rotatable therewith, and receiving the extended valve stem to rotate it, a removable thermal insulative plug in the central space for thermally insulating the subassembly, and a removable cap closing the outer end of the body. Connection of the body to the valve plate preferably includes snap-on detents. The body preferably has drive lugs interfitting with the valve plate. One embodiment has an adjustable memory stop plate serving as the valve plate, the stop mechanism being accessible with a tool extended through the central space of the body after removing the insert and cap.

Abstract: A valve apparatus has a flow control valve having a supply passage communicating with a hydraulic fluid supply source, a load passage communicating with an actuator, and a first meter-in variable restrictor disposed between the supply passage and the load passage and opened dependent on an operation amount there; a first signal passage located downstream of the first variable restrictor and having a passage section for detecting load pressure of the actuator; a tank passage communicating with a reservoir tank; a discharge passage for communicating the first signal passage with the tank passage; and a second variable restrictor provided in the discharge passage and having its opening variable dependent on the operation amount of the flow control valve to produce in the first signal passage a control pressure different from the load pressure, the control pressure in the first signal passage being led to the hydraulic fluid supply source though a second signal passage.

Abstract: A suction inlet pump, useful with pumper firetrucks, has a floating valve element which is normally biased closed by a spring. The motion of the floating valve is also positively determined by a cam engaging a shaft extending from the floating valve element and aligned with the cam. The cam is moved from a first position that positively holds the floating valve element completely closed to a second position which allows the floating valve element to fully open. By selectively positioning the cam between the completely closed and fully opened positions, the amount of water entering the valve may be selected so that the valve functions properly for the particular use to which it is put. The suction inlet valve includes a lockable operating handle which is used to rotate and position the cam. An indicator on the exterior of the valve housing indicates the position of the cam.

Abstract: A travel stop assembly is provided for a valve and an actuator. The travel stop assembly includes a coupling which can be non-rotatably engaged between the valve stem and the actuator shaft to transmit rotation from the actuator shaft to the valve stem. The coupling includes a flange intermediate its length with a pair of opposed stop surfaces thereon. A pair of threadedly adjustable bolts are mounted intermediate the valve and the actuator for threaded advancement toward or away from the coupling. The bolts are angularly aligned to one another and can be independently advanced or retracted to engage the stop surfaces of the flange on the coupling to control the maximum rotation of the coupling and hence the valve stem.

Abstract: This invention pertains to a method and apparatus for venting pressure from within a pressurized housing. It incorporates a sealing assembly that is secured within a housing and restrained against a pressurized channel by a nut. By loosening the nut, restraint on the sealing assembly is released thereby allowing fluid from the channel to travel the length of the sealing assembly and exit the housing. Conversely, by tightening the nut, restraint on the sealing assembly is reapplied which blocks the channel once again thereby preventing any more fluid from flowing.

Abstract: An improved vacuumizer valve assembly is provided which permits precise, infinite valve adjustment from outside of a vacuumizer apparatus, thus eliminating the need to open the vacuumizer chamber during adjustment procedures. The valve assembly of the invention preferably includes a piston and cylinder assembly operated valve member, with a threadably shiftable adjustment stop coupled with the piston and cylinder assembly. During adjustment procedures, the stop is shifted as necessary to thereby alter the stroke length of the valve assembly and thereby the maximum valve clearance achieved when the valve is opened.

Abstract: A single-handle faucet has a valve, a connecting rod and a handle on the connecting rod which can be pivoted between an OFF position and a full ON position. The handle is movably mounted on the connecting rod. When the handle is moved to a first position, the handle is prevented from pivoting past an intermediate position between the OFF position and the full ON position. When the handle is moved to a second position, the handle can be moved to the full ON position.

Abstract: A desired-value transmitter (2) is flanged onto a throttle-valve connecting piece (1), the desired-value transmitter having a setting shaft (5) aligned with a throttle-valve shaft (3). The setting shaft (5) engages in rotatable manner via a pin (9) into a bearing bushing (11) which is also rotatably mounted within a mounting hole (10) in the throttle-valve shaft (3). In this way, capacity for rotation of the adjusting shaft (5) with respect to the throttle-valve shaft (3) is doubly assured. Supporting of the setting shaft within the housing is unnecessary on the side facing the throttle-valve shaft (3).

Abstract: A hydraulically operated valve with controlled lift, in particular a fuel/gas injection valve for internal combustion engines, has a stop face fixed on the valve stem. For accurate control of the opening of the valve a stop cam is provided, which is drivn mechanically via a friction clutch, and which cooperates with the stop face. By rotating the cam through a predetermined angle the maximum valve lift will be obtained. The cam may be brought into contact with the stop face even in the closed position of the valve.

Abstract: In a valve apparatus comprising a controlling arrangement which is for controlling a flow of a beverage in a beverage path, the controlling arrangement comprises a valve member which is movable between an open and a close position for opening and closing the beverage path and which is urged to the close position through a force transmission member by a compression spring. When the force transmission member is moved against the urging arrangement, the valve member becomes movable towards the open position. However, movement of the valve member is restricted at the open position by a stopper. Preferably, the stopper has a position which can be adjusted by operating of an operator or a user.

Abstract: A beverage dispenser valve system in which the mixture ratio is controlled by continuous modulation of the solenoid valves. The solenoid valves have a movable stop (or push rod) that controls the travel of the armature, which in turn controls the position of a needle valve with respect to the valve seat to gradually change the flow opening and thus the syrup and water flow rates. A microprocessor uses the movable stop to adjust the syrup and/or water flow rate to deliver the proper ratio of syrup to water based on the flow of water and syrup as measured by flow meters. In addition, the total flow rate from the nozzle can be controlled and varied in relation to the distance the cup lever arm is depressed, thus, the flow rate can be made slow at the beginning and end, and fast in-between.

Abstract: A burner assembly includes a burner housing having a combustion chamber defined therein and a fuel injection nozzle secured to the burner housing and communicating with the combustion chamber. A fuel control device is provided for controlling the amount of fuel flowing through the nozzle. The fuel control device includes a valve chamber including a bore and a valve seat and a needle valve adapted to reciprocate in the valve chamber. An adjusting device is provided for adjusting a range of motion of the needle valve in the valve chamber. The adjusting device includes a control rod secured at one end to the needle valve and a bimetallic assembly for regulating the motion of the control rod. The bimetallic assembly includes a pair of legs which are operably connected to the control rod and are exposed to the heat produced by the burner assembly.

Abstract: This invention is an improved brake bleeder screw for use in the removal of entrapped gases from a vehicle's hydraulic wheel brake system. It is comprised of a discharge section containing external threads and an internal passageway, an extending device such as a compression spring, which is partially contained within an internal passageway of the discharge section and a sealing mechanism with an internal passageway, a head and an opening from the outside of the sealing mechanism to the internal passageway of the sealing mechanism. This improved brake bleeder screw can be substituted for existing hydraulic brake bleeder valves and permits the one-person bleeding of a hydraulic brake system.

Abstract: A diaphragm valve includes alternative actuator structures. The first actuator arrangement includes an adjustable nut received on a bonnet portion of the valve for adjusting the stroke of an actuating stem. According to a first alternative arrangement, a sleeve is interposed between a biasing spring and an actuating member to limit the closing force imposed on the diaphragm. A stop defined on the bonnet limits axial movement of the actuating stem so that the spring eventually imposes the entire closing force on the diaphragm. In yet another embodiment, actuating pressure is reduced through incorporationh of a dual pistion actuator arrangement.

Abstract: The invention relates to a mixing valve for hot and cold water comprising a cartridge type body, two overlapping disks, one fixed and the other one movable, which interact in opening and closing the water ducts, and a rotating and pivoted control lever to displace and position the movable disk on the fixed one to open or close the water flow. Said control lever is assisted by a slide gate to control the maximum water output by limiting the oscillation of the lever and by a ring designed to adjust the temperature of the mixed water by limiting the rotation of said control lever.

Abstract: A high speed water dumping valve apparatus usable attached with respect to a water reservoir which includes a housing with a flow chamber and water inlet and outlet defined therein. A door with a gasket means is adapted to extend over the water inlet for selective sealing thereof. A door control member including a horizontally extending crankshaft and a crank yoke fixedly secured thereto is included. A drive bar is connected between the crank yoke and the door for controlling movement of the door between the opened and closed positions. The drive bar preferably is formed of two bar sections at an oblique angle with respect to one another such as to extend around the crankshaft to facilitate over-center locking of the door in place selectively. A handle is secured with respect to the crankshaft to be rotatable therewith to urge movement between opened and closed positions as desired.

Abstract: A mixing valve (10) has a modular cartridge (60) rotatably mounted in housing (12). The cartridge has a bottom volume control valve plate (58) attached to a lower section (62) housing a pressure balance valve (80). The lower section (62) is secured to an upper section (120) that rotatably receives a temperature control plate (150). The plates (58) and (150) are both rotatable about a common axis (64). The plate (58) is controlled by operation of stem (180) attached to handle (34). The plate (150) is controlled by stem (160) which is operated by knob (38). An insert (250) allows the knob (38) to operate even when hot and cold water supplies are inverted. A splined hot water stop ring (228) sits in handle (34) and adaptably limits rotation of knob (38) for a selected maximum water temperature. Outer seals (58) assure that all water flows through cartridge (60) when the volume is set for partial flow.

Abstract: A control valve in which the bonnet is removably fixedly attached to the valve body by a retained bolt and slot arrangement in such a way as to fix the marginal edge of the diaphragm main valve therebetween. The diaphragm defines with the bonnet a control chamber having an inlet control passage leading thereto from the valve body inlet and an outlet control passage leading therefrom to the valve body outlet. A control valve seat in the outlet valve seat is controlled by a solenoid plunger valve element in such a way as to afford either manual or electrical solenoid operation by virtue of a manually movable member mounting the solenoid assembly on the bonnet. An adjusting knob member is mounted by a snap fit on the bonnet in laterally offset relation with respect to both the main valve and the solenoid assembly.

Abstract: A beverage dispenser valve system in which the mixture ratio is controlled by continuous modulation of the solenoid valves. The solenoid valves have movable stop (or push rods) that control the travel of the armature, which in turn controls the position of a needle valve with respect to the valve seat to gradually change the flow opening and thus the syrup and water flow rates. A microprocessor uses the movable stop to adjust the syrup and/or water flow rate to deliver the proper ratio of syrup to water based on the flow of water and syrup as measured by flow meters. In addition, the total flow rate from the nozzle can be controlled and varied in relation to the distance the cup lever arm is depressed; thus, the flow rate can be made slow at the beginning and end, and fast in-between.

Abstract: A flapper control valve having a valve housing and at least one valve port plate sealably secured to the valve housing. Each valve port plate has at least one valve port plate through hole. At least one back plate is mounted downstream from the valve port plate and in an open position at a distance from the valve port plate. Each back plate has at least one back plate through hole. In the open position, at least one valve port plate through hole is in communication with at least one back plate through hole. The distance between the back plate and the valve port plate in the open position can be closed thus sealing the communication between at least one valve port plate through hole and at least one back plate through hole.

Abstract: A device is provided for controlling the position of a damper within a flue or stack of a forced air heating or cooling system or a commercial or industrial boiler. The device comprises a damper plate and means to control rotation of the plate within a flue under force supplied by the movement within the flue of air or gases.

Abstract: A quick-action valve is opened and closed by a quarter turn. Safe closing with high mechanical advantage is provided, while the valve member is removed completely from the path of the flow upon valve opening. The valve member is fixed to a valve arm, mounted for rotation on a shaft. The valve includes an auxiliary shaft around which an actuating arm with a roller fixed to it are turnable. The roller moves the valve arm, or an auxiliary arm connected to it, so that upon closing it rolls substantially tangentially on a camming surface, thus bringing about maximum force transmission. A few degrees after the dead center position, rotation of the actuating arm is limited by a stop, and self-holding takes place in the closed position. In a preferred version the roller runs in the groove on the valve arm or auxiliary arm.

Abstract: A fuel control system for a turbine engine includes a fuel flow regulator comprising a double differential piston slidable in a sleeve to vary the opening and closing of a fuel inlet or outlet and thereby regulate the output flow of fuel from the regulator. A first fixed stop limits the movement of the piston in one direction to define the maximum output flow of fuel permitted by the regulator, while a second stop, in an operative safety position, limits the movement of the piston in the opposite direction to define a minimum fuel output threshold. The second stop can, however, be retracted to an inoperative position by actuation of a control circuit to allow the minimum fuel output threshold to be overcome and the regulator piston to reach an extreme nil outflow position.

Abstract: A valve has a housing to which a 360 degree notch plate is integrally connected. A valve member mounted within the housing control fluid flows and rotates though substantially 90 degrees between maximally open and closed positions. A valve stem extends upwardly from the valve and through an opening formed in the notch plate. A handle is releasably secured to the valve stem immediately above the notch plate and has a spring-biased pivoting arm which cooperates with the notches to permit the angular position of the handle and consequently the valve member to be incrementally adjusted and locked. The upper surface of the notch plate has four distinct quadrants, and a number of holes formed at predetermined locations, a different pair of holes being associated with and positioned to either side of each quadrant. The valve stem is shaped to receive the handle in only predetermined angular orientations relative to the valve member.

Abstract: An improved liquid dispensing apparatus having a micro-adjustment of the opening travel of a needle valve of the apparatus. This micro-adjustment comprises a sleeve-stop member which is axially movable but non-rotatable in the body of the apparatus. One end of the sleeve-stop member forms an end-stop to limit opening movement of the needle valve away from the valve seat. Screw threads of a first pitch are formed on an external portion of the sleeve-stop member and internal screw threads of a second pitch different from the first pitch are formed on a portion of the apparatus body. A generally tubular adjustment screw element is engaged with both the internal scew threads of the body bore and the external screw threads of the sleeve-stop member so that rotation of the adjustment screw element causes differential axial movement of the sleeve-stop member for fine adjustment of the maximum opening needle valve travel.

Abstract: A pressure control valve (10) comprises a first element (14) arranged to pivot relative to a second element (18) in response to inflation and deflation of a sac (16) interposed between the elements, the second element having a fluid passageway (32, 34) including an outlet (32a) which is controlled by said first element by virtue of its pivotal movement, said fluid passageway communicating with said inflatable sac, means (30) being provided to adjust and limit the pivotal action of the first element.

Abstract: A self-closing valve assembly for sanitary installations is disclosed. The valve assembly includes upper and lower valve housings which define a metering chamber that is normally filled with a metering fluid. A metering means, shiftably mounted in the lower valve housing, includes a first one-way valve means which displaces a predetermined volume of the metering fluid when said valve assembly is shifted to its opened position. A closure means, which includes a second one-way valve means, is operably coupled to the metering means to automatically shift said metering means from its opened to its normally closed position, by transferring the displaced volume of said metering fluid in the metering chamber through a second one-way valve means after a predetermined period of time has elapsed, to thereby close said valve assembly.