Abstract: A vacuum-actuated tool for handling of electronic articles, such as integrated circuit chips, wherein the tool includes an elongated body having first, second, and third passageways. The second passageway is connected to a vacuum source, while the first passageway leads to a pickup tip that contacts the article to be handled. Positive pressure sealing provides a leak-proof closure of the second passageway when the article is to be released. The third passageway is in fluid communication with the atmosphere and is linked to the first passageway simultaneously with the positive pressure sealing of the second passageway. In a pickup position, the third passageway to the atmosphere is pressure sealed to prevent leakage through the third passageway to the atmosphere. The pressure seals are provided by elastomeric members.

Abstract: A vacuum manipulator having a spool valve mounted in a sliding fashion in a guide channel at the bottom of which are two holes in communication with two duct segments with one segment intended to be connected to a suction source, and a longitudinal guide channel connected to the spool valve for placing the holes in communication with the atmosphere, and a bearing surface of the spool valve with the bottom of the guide channel being limited to three zones which provide a high specific vacuum while also providing a large seating and guide area, and the spool valve being movable against the pressure applied by a spring between a front span and a back stop which may also define a third locking position.

Abstract: A valve arrangement for a pressure fluid, particularly high-pressure oil, has a valve housing (10, 90, 190) with an internal, cylindrical sealing surface (16, 100, 160) which forms a guide for the outer, cylindrical sealing surface (42, 107, 162) of a piston body (18, 106, 138). There is provided a circular groove which accommodates a sealing ring (46, 64, 108, 164). An axially displaceable valve sleeve (30, 70, 122, 156) is disposed coaxially with the two cylindrical sealing surfaces(16, 42, 100, 107, 162, 160) and has a cylindrical valve-sealing surface (40, 74, 124, 158). This valve sleeve is biased by a spring (34, 80, 118, 172) such that one end (36, 82, 126, 174) abuts substantially sealingly a seating (38, 86, 128, 176) at that end of the sealing surface such as to form a closed gap (41, 86, 130, 178) at one end of a channel (32, 73, 132, 145).

Abstract: In a valve pistol, particularly for a high pressure cleaning device, with a pistol housing (1) with a handle (2), with a valve (3) placed in the pistol housing (1) that is opened against the system pressure by a force transmission element that is displaced against a valve body (9) by a hand lever (12) that is mounted so that it can be pivoted on a pivot pin (11) in the pistol housing (1). The hand lever (12) can be pivoted over a certain pivoting path and has an actuating arm (13) that engages against the force transmission element (10).

Abstract: A push-button type water-controlling device having a press control rod having a cylindrical button on the top and a rectangular rod portion with a rectangular leading groove; a heart-shaped positioning groove; a fixed base, an upper fixed cover having a round hole; and a rectilinear hole; a positioning member entering into the round hole and into the rectangular leading groove at one end, and encasing to the rectangular hole and the heart-shaped positioning groove at the other end; and a spring mounted between the cylinder button and the fixed base is shown and described.

Abstract: Disclosed is a cartridge-type flow control valve principally for use in public drinking fountains. The cartridge-type valve includes a substantially cylindrical housing open at one end. Mounted within the housing is a fluid transfer member which includes an integrally formed fluid transfer chamber, inlet nozzle and outlet nozzle. A valve stem slidably extends into the fluid transfer chamber and is sealed by means of O-rings. The valve stem includes a substantially cylindrical eccentric protrusion which can be used to regulate the amount of flow through the cartridge valve. The eccentric protrusion is adjacent to the inlet bore to the fluid transfer chamber and thus, by rotating the valve stem, the gap between the eccentric protrusion and the inner wall of the fluid transfer chamber at the inlet bore can be varied. Varying this gap allows some amount of flow control.The valve stem has attached thereto a valve stem cap.

Abstract: A coupling having one end attached to a drop pipe of a fire sprinkler system and another end for attachment to a tool subsequent to initially testing the sprinkler system and to a sprinkler head thereafter. The coupling includes an internal frangible closure member to prevent flow of fluid from the drop pipe during the test phase so that the sprinkler may be pre-tested prior to attachment of the sprinkler head. The tool includes an external housing which after completion of the test phase is connected to the coupling, a ram being mounted within the housing and adjustable to position and impact member at the end of the ram at or in abutment with the frangible closure member. The ram is connected to a propelling assembly which permits the ram to be pulled manually against the biasing force of a spring away from the closure member, and upon release of the ram, the ram is propelled toward the closure member so that the impact member shatters the closure member to open communication through the coupling.

Abstract: A valve assembly has a valve operting button with an outwardly extending button flange received in a cavity. Liquid entering the cavity floats the button to move the button flange into engagement with a surface, and this tends to seal the cavity and cause liquid pressure buildup therein. A venting path between the button flange & the surface it engages prevents sealing of the cavity, and prevents liquid pressure buildup therein.

Abstract: An exhaust valve (10), particularly for a blood pressure measuring apparatus, comprising a valve seat (31) disposed along the course of an outlet channel in a valve housing (11) and oriented toward the pressure side of the valve. A valve body (25) having the form of a slender conical frustum arranged on the pressure side of the valve seat (31) cooperates with the valve seat. Valve body (25) is urged against the valve seat (31) by a closing spring (27). To facilitate controlled release of an elevated pressure contained by the valve, a screw cap (37) is arranged on the valve housing (11) along the axial projection line of the valve body (25), and the valve body (25) is connected to the screw cap (37) through a support bearing (43). A two-stage steep thread (44,45) is provided between the screw cap (37) and the valve housing (11).

Abstract: The valve comprises a flat, rectangular body attachable to the drain fittings of crankcases by an attachment fitting having passages which allow flow through the fitting into the body. The body has an outlet port in one of its sides. The port is opened and closed by a seal attached to a slider which slides on bolts extending from the side having the port. The slider is forced toward the port by coil springs on the bolts and moved away from the port to open the valve by tension applied by the core wire of a Bowden cable. The cable extends from a header piece held between the springs on the bolts and the bolt heads to an operating mechanism attached to a readily accessible point on the vehicle in which the crankcase is used. A lever, pivoted to the base of the operating mechanism, is operable to apply tension to the core wire of the cable to open the valve and can be moved over center to hold the valve open. Moving the lever back over center allows the springs to close the valve.

Abstract: A manually-operated dispenser for user-controlled discharge of an internally-stored fluid includes a variable length assembly normally driven to its maximum longitudinal extension for substantially closing a fluid discharge opening and for fluid-tightly closing a vent opening disposed at opposite ends of an elongated housing, the fluid discharge opening being normally sufficiently closed so as to prevent discharge of stored fluid through the discharge opening but permitting predetermined bleeding of fluid from the housing interior through the discharge opening, a piston bounding an end of an internal fluid reservoir and operatively movable along the housing for volumetrically reducing the reservoir and for driving stored fluid toward and through the discharge opening, and an actuator assembly manually operable by the user for causing controlled foreshortening of the variable length assembly whereby the fluid discharge and vent openings are concurrently opened permitting the forced discharge of a corresponding

Abstract: A dual push-button control valve assembly which can be mounted on the side wall of a cistern. The assembly includes a housing having an end which is passed outwardly through a hole in the wall of the cistern. Collars are threaded onto the end on opposite sides of the cistern wall to lock the assembly in place. The assembly also includes a cap which is clipped to the outer collar and which has openings receiving side-by-side push-buttons. Selective depression of the push-buttons results in actuation of the valve components situated within the housing and the supply of mains water through one of two outlet ports leading from the housing.

Abstract: A cistern flushing apparatus of the kind which comprises an upright stem carrying a closure member at its lower end which, in a first position of the stem, seats on a cistern outlet and which, in a second position of the stem, is raised off the outlet to permit flushing to take place. The stem is held in its second position by a float-controlled arm which releases the stem to return to its first position with a predetermined volume of flush has taken place. The stem is raised by water at mains pressure.

Abstract: A package (10) for dispensing a fluid (26) in the package under gas pressure has a biaxially oriented polyethelene terepthalate bottle (12) with a neck (14). A dispensing head (22) is attached to the neck (14). A normally closed valve (16) is mounted in the neck and has a housing (50) sealed to the inside surface of the neck (14). The housing (50) has a syphon flange (54). An integral structure (56) having a spring (58) at one end and a poppet (60) at a second end rests on the syphon flange (54). The housing has an opening (48) above the syphon flange 54). The integral structure (56) extends between the syphon flange (54) and the opening (48). The integral structure (56) is dimensioned so that the spring (58) is compressed to bias the poppet end of the integral structure (56) into sealing engagment around the opening (48). The dispensing head (22) has an integral diaphragm (42) and rods (52) and (46) extending above and below the diaphragm (42).

Abstract: An infusion pump is disclosed in which a canister of compressed gas is regulated to provide a continuous source of pressure to one or more compressible fluid sources. Valves on the outlets of the sources prevent fluid from escaping except when the valves are opened. The valves are opened by solenoids which are selectively activated to open the valves.

Abstract: A drainage valve unit for use with a casing for collecting a drain includes a valve body adapated to be mounted on the casing and having a fluid passage and a chamber defined therein and communicating with each other, a valve member disposed in the fluid passage and movable axially of the fluid passage for opening and closing the fluid passage, and a pusher body disposed in the chamber and movable axially of the chamber, the pusher body being displaceable from outside of the valve body for causing the valve body to open the fluid passage to discharge the drain from the casing through the fluid passage. The valve member can reliably be moved to open the fluid passage for discharging the drain by pushing the pusher body irrespective of the pressure within the casing. When the fluid passage is opened, the drain can quickly be discharged without falling on the operator's hand and fingers.

Abstract: In construction of a valve shifting mechanism for a brass instrument in which tube length is changed by selectively moving a piston tube in a valve casing against a spring, a valve guide made of synthetic resin is fixed, in sliding engagement with the valve casing, to a valve rod seat fixed to the piston tube by means of a piston rod screwed at one end into the piston rod seat for reduced generation of harsh noises when the valve is shifted and to simplify assemblage of the valve. An elongated slot is formed in the valve guide extending in the radial direction of the piston tube so as to permit a fixed size valve guide to be used with valve casings of different sizes.

Abstract: In an hydraulic anti-skid braking system of the pump and de-boost type, the de-boost piston is held in an advanced inoperative position by a volume of fluid trapped in a space and supplied by a pump. A bleed device communicating with the space is held in an open position during initial bleeding of the system by a friction device which acts as a stop and which is releasable when the bleed device is subjected to a predetermined pressure. This enables initial bleeding to be carried out automatically and without an operator operation to open and close a bleed device. After initial bleeding, the device can be opened manually to enable subsequent bleeding to be carried out, with the spring assembly acting on the de-boost piston also acting to close the bleed device following release of the manual force.

Abstract: A valve especially designed for use in a prosthetic device such as an artificial limb wherein the limb stump is mounted within a mating socket provided by the prosthetic device and is firmly secured therein by vacuum sealing, the valve being is connected to vent the lower portion of the prosthesis socket when manually actuated. The valve includes a central core section of elastomeric material which is formed with a passageway therethrough for venting the prosthesis cavity and which is formed with an enlarged valve chamber and a valve set facing away from the prosthesis cavity. A valve member is mounted in the chamber and is moveable to and from the set to provide sealed and vented positions respectively. The movement of the valve is controlled by a finger engaging button which is in turn biased by elastomeric nodules to move the valve member to its seat thereby sealing the prosthesis chamber.

Abstract: A catheter and closure device in the form of a valve which remains in place at the hose during normal urination and has to be separated from the hose only for flushing out; the catheter valve includes a conical part serving for the insertion into the catheter hose; additionally, the valve includes on its inside a rubber-elastic valve hose adapted to be influenced from the outside, which during actuation of the valve is opened uninterruptedly but is closed in the non-actuated rest position by a single or multiple kink, fold or twist; the valve includes a fixed part with a through-bore as well as the rubber-elastic hose in extension of this bore; a sleeve with a spring 5 is placed over these parts, whereby the kinked hose is straightened out by the axial displacement of the sleeve opposite the spring force.

Abstract: Pulsation absorption device comprising a pressure vessel, a bladder housed in the pressure vessel, liquid incoming and outgoing paths formed by dual cylinders placed under the pressure vessel, a valve system for opening and closing said liquid incoming and outgoing paths, said valve system includes a dash pot means for slowly opening and closing a valve body whereupon the valve body is controlled from being abruptly moved with rapid streaming speed of high pressure liquid or pressure variation thereby the function of pulsation absorption is more enhanced and any trouble and damage to the pressure accumulator system is avoided.

Abstract: A housed valve is proposed which serves in particular as a metering and distribution valve for a fuel injection system of a mixture-compressing internal combustion engine with externally supplied ignition. The valve includes a control slide with a control edge and at least two control slits. The control edge opens the control slits to a greater or lesser extent depending on the relative movement between the control slide and the control slits. A helical spring is supported on one control slide end, the end of the spring oriented toward the control slide being bent at an angle and arranged to protrude into an opening of the control slide end, while the other end of the spring is connected in a twist-free manner with the valve housing.

Abstract: A tire valve assembly (10) which includes a valve stem (11), a combined actuating pin and valve element (14), a spring (18) and a retainer (16). A valve seat (19) is formed as part of the stem, and the combined pin and valve element is made of a material which is sufficiently rigid to function as an actuating element yet is sufficiently resilient to serve as an effective seal.

Abstract: A closure insert assembly (10) for a control rod drive mechanism that has incorporated therein a vent valve arrangement which permits the release of air trapped in the nuclear reactor during the filling of the primary coolant system therein and allows the entrance of air into the reactor for the draining of same. To accomplish this, the vent valve is of the ball type which engages two oppositely disposed conical ball seats (44, 70), one of which is allowed to move laterally with respect to the other, causing the ball (66) and ball seats (44, 70) to be "self-centering" and resulting in a uniform compressive force being applied over minor circumferences on the ball (66). The use of conical ball seats (44, 70), one of which is laterally movable, also permits the axes of the conical ball seats (44, 70) to be non-parallel and/or non-concentric without hindering the operation and effectiveness of the vent valve.

Abstract: A test in place poppet valve and fitting assembly having a minimal air volume internal configuration is provided for attaching a portable hydraulic test system to a snubber internal hydraulic line. The valve fitting includes structure for connection to the test system. After the valve fitting has been attached to the poppet valve, but before the poppet valve has been opened, a passageway and the interior of the poppet valve are evacuated and filled with hydraulic fluid. A remotely actuated, spring biased probe extends from the fitting through the passageway to engage a poppet for selectively opening the poppet valve. When actuated to an open position, a prong on the probe is inserted into a cavity, and the poppet is supported on the probe. Using the poppet valve and valve fitting, the test system may be attached to a snubber internal hydraulic line 12 without introducing an appreciable amount of air.

Abstract: A cleansing device for use in a substantially erect attitude, the device having a housing with a grasping portion and a cleansing portion and a passage extending through the housing interconnecting the grasping and cleansing portions; a conduit mounted on the grasping portion of the housing having a distal end portion adapted to be connected to a source of liquid for transfer of liquid from the source through the conduit and into the passage of the housing; and a liquid absorbent element affixed on the cleansing portion of the housing in communication with the passage and facing in an upward direction when the housing is held in a substantially erect attitude with the cleansing portion higher than the grasping portion.

Abstract: The valve of U.S. Pat. No. 3,774,877 in which have valve operating pistons are mounted in a tubular sleeve received in a bore in a two part valve body, one part containing the connection for P1 and the other part containing the connection for P2 and the valve port.

Abstract: A remote delivery nozzle assembly is adapted to be releasably connected to a pressurized container to permit delivery of the pressurized contents thereof to a location remote from the container. A cap assembly is connected through a flexible conduit to a wand for delivery of the pressurized contents of the container. Upon seating of the cap assembly on the container, the valve of the container is opened pressurizing the wand through the flexible conduit. The wand includes a flexible membrane which when depressed by finger pressure opens a valve between the pressurized inlet and an outlet passage to deliver the pressurized fluid.

Abstract: An improved blood sampling device particularly suited for obtaining arterial blood samples. The device includes a molded plastic carrier having front and rear needles and a valve for controlling flow between the needles. The rear needle punctures the stopper of an evacuated sampling tube when it is inserted into the carrier. The front needle is then inserted into the patient and the value, which may be a one piece device made of a resilient material such as polyurethane, is opened to allow blood to be drawn into the sampling tube.

Abstract: A fast acting on/off valve formed of molded plastic components includes a molded plastic body bearing offset inlet and outlet passages which extend from opposite ends through integral nipples to a common area, with communication effected by way of a bore and counterbore for respective outlet and inlet passage portions. The end of the bore, at a shoulder formed between the bore and counterbore, is chamfered. A spool type plunger having lands at opposite ends is mounted within the counterbore and bore with one land sized to the bore and the other being sized to the counterbore, that land having a conical inside face at an angle corresponding to the chamfer. A coil spring is compressed between the larger diameter land end of the plunger and a cap which is welded to the valve body and closes off the counterbore, the spring biasing the spool type plunger to valve closed position.

Abstract: An attachment for the spout of a sink fixture permits the stream of mixed hot and cold water to be readily turned all the way on and off, by simple flipping of a snap-action lever control, without it being necessary to adjust the hot or cold faucets. The flipping is non-critical and does not require any fiddling. The desired temperature and rate of flow are maintained, after having been initially achieved, during subsequent turnings on and off of the stream. The attachment is designed to be screwed into place between the spout and its matching non-splash aereator, normally screwed directly to the spout.

Abstract: A well testing system and method in which a by-pass valve is positioned in the tubing and a probe run on a line from the surface opens and closes the valve with vertical movement of the probe. The probe when landed in the valve is exposed to formation fluids and may transmit back to the surface, or may record information about the formation. The probe may also collect a sample of fluid to return to the surface with the probe.

Abstract: A purge valve for full face masks or helmets includes a base member fixed the mask wall and having passages opening in a flat, annular valve seat surface. A manually operable valve member includes an outer cylindrical wall, an inner cylindrical wall reentrant from an end wall and is axially slidable on a stem extending from the base member against the action of a compression spring nested between the cylindrical walls.

Abstract: The invention is an improved aspirator for use in medical procedures. The aspirator is provided with a rubber band powered piston control valve that maintains the valve in the off position. When operated to the on position by a user, the rubber band is placed in tension mode so that when released by the user the rubber band returns the valve to the off position. The rubber band powered piston valve aspirator is simple to disassemble without tools for cleaning and sterilization.

Abstract: A brake control apparatus for railway cars having sprung and unsprung portions is interposed between a brake pressure supply line and a brake cylinder line. A first chamber is connected to the brake pressure supply line and a second chamber is connected to the brake cylinder line. The chambers are abutted by surfaces having different cross-sectional areas of a diaphragm which is biased. A first valve responsive to positioning of the diaphragm, and a second valve responsive to positioning of a strut in a strut cylinder, effect first and second predetermined relationships between pressure drop in the brake pressure supply line and pressure drop in the brake cylinder line. The strut cylinder, mounted between the sprung and unsprung portions of the railway car, may be adapted to sense partially loaded as well as fully loaded or unloaded conditions.

Abstract: A pressure relief valve for a blood pressure measuring instrument which is provided with a discharge mechanism for selectively discharging a small or large amount of compressed air. The discharge mechanism of simple structure is constituted from a small number of members including a valve member, a spring, an adjustment screw plug and a push button. A cuff pressure is automatically reduced at the predetermined reducing rate by rotating the adjustment screw plug during the measurement of blood pressure. Pushing of the push button also makes it possible to discharge at once the remaining cuff pressure after the measurement of blood pressure.

Abstract: A brake valve device including a valve-actuating piston for contacting and effecting operation of a valve member, the valve-actuating piston being provided with a stepped bore in which a spring-biased spring seat member is engaged by and axially slidably movable by a push rod for actuating the valve device. The peripheral surface of a guide flange formed on the spring seat member for stabilizing axial movement thereof in the stepped bore, is spherically-shaped for permitting such axial movement without hang-up or jamming in the bore.

Abstract: A feed pressure bypass valve means and actuator means primarily for a single acting servomotor, is provided having a unitary housing construction and an assembly of opposed springs wherein one spring biases a bypass valve to closed position and the other spring is compressed by the servometer piston to act in the opposite direction. The bypass valve is mounted externally of the servomotor as a separate and integral unit and has for its purposes to ensure maintaining a drop in feed pressure as the piston nears the end of its stroke. The provision of the spring compressed by the piston toward the end of the stroke ensures the opening and maintenance of opening of the bypass valve. There can be no instability of steering operation by virtue of the bypass valve closing and the striking of the servomotor cylinder wall by the piston is precluded.

Abstract: An attachment for the spout of a sink fixture permits the stream of mixed hot and cold water to be readily turned all the way on and off, by simple flipping of a snap-action lever control, without it being necessary to adjust the hot or cold faucets. The flipping is non-critical and does not require any fiddling. The desired temperature and rate of flow are maintained, after having been initially achieved, during subsequent turnings on and off of the stream. The attachment is designed to be screwed into place between the spout and its matching non-splash aereator, normally screwed directly to the spout.

Abstract: A fluid flow valve stem for a vessel, tire, or the like comprising a sleeve having an inner annular valve seat, an end cap secured to one end of the sleeve by a vacuum lock, and a captive plunger interposed between the valve seat and end cap, and having a seal member biased by a spring into engagement with the valve seat. The sleeve is encapsulated within a polymeric body which is securable to a vessel, tire wheel, or the like. Alternatively, the end cap may be directly secured to an inner tube or the like.

Abstract: The improvement in a blood filtration unit for filtering multiple units of blood comprising means for filtering air entering the unit.

Abstract: A deflation valve for blood pressure measuring devices having a valve body with a threaded extension surrounded by concentric outlet grooves for slow-deflation and dumping purposes, respectively, in an outwardly facing flat valve seat covered by a flexible valve disc. The valve disc, clamped fast on its inner periphery and held against the valve seat by a spring, has attached to it a sleeve-like control member which can be operated at any point on its periphery by a hand holding the inflation bulb to which the valve is attached.

Abstract: A valve for regulating flow of fluid in a refrigerating system. The valve includes a valve chamber with an inlet, an outlet and a sensing bore communicating therewith and there is a valve element in the chamber for controlling flow of fluid from the inlet passage past a valve seat to the outlet passage. The valve element is urged by a spring pressed plunger toward an open position and is pressed by a thermostatically actuated piston extending through the sensing bore toward a closed position in opposition to the spring pressure.

Abstract: A specific embodiment provides a valve structure for an evacuator system adapted to be connected to a source of negative pressure. The valve structure includes an elongated housing having a longitudinal bore extending through the housing, and a valve seat formed by a reduced diameter portion of the bore. A valve member is situated in the bore for abutting engagement with the valve seat to prevent passage of flowable materials therebetween. Biasing means is provided for urging the valve member into abutting engagement with the valve seat. A manually operable member is operatively associated with the biasing means for moving the valve member out of engagement with the valve seat to permit passage of flowable materials therebetween.

Abstract: Improvement in a spray bar for metal rolling having a body and a plurality of spray nozzles carried thereon, a flow control valve for the spray bar for controlling the flow of liquid through the nozzles, the valve having a valve body and a valve spool reciprocable in the valve body, a liquid passage in the spray bar, the valve arranged in respect to the spray bar so that a portion thereof extends across the passage and liquid enters the valve from the passage, a yieldable member operative upon the valve spool for biasing it into its closed position, the improvement comprising a moveable member arranged in respect to the spray bar for controlling the movement of the valve spool, an arrangement for applying a variable force on the member so that the movement of the valve spool and the flow of liquid through the valve is directly proportional to the amount of force applied to the member, the member disposed at the rear of the spray bar so that the member pushes upon the valve spool for opening the valve, and the

Abstract: A slide valve is disclosed including a slider disposed between and slidable with respect to a pair of intercoupled valve body members. Selective positioning of the slider controls fluid flow through the slide valve. The slider includes at least one aperture and a tube communicating therewith. One of the valve body members includes at least one passageway with which the aperture of the slider can selectively communicate. A resilient pad with at least one aperture therethrough is positioned in a cavity in this valve body member and is disposed between the slider and the passageway. The other valve body member functions as a cap and is coupled with the first, and includes an elongated slot through which the tube of the slider extends. When the aperture of the slider overlaps or is aligned with the passageway of the first valve body member and the aperture of the pad, fluid communication exists through the valve.

Abstract: A depress button type sprayer comprises a piston slidably inserted into a cylinder and provided with a liquid jetting nozzle, a lever for moving the piston into the cylinder against the force of a spring and a depress button for operating the lever.

Abstract: An air valve for a carburetor has its lower end mounted for pivotal movement between open and closed positions relative to the air and fuel mixture conduit and carries a metering rod which extends generally in a horizontal direction. The metering rod has an end extending within a metering orifice of an orifice plate in an opening of the mixture conduit wall. The metering rod is urged by a coiled torsion spring upwardly against the orifice plate. The torsion spring has a small coil with a relatively high spring rate and a large coil with a relatively low spring rate. The large coil continuously urges the rod into engagement with the upper surface of the orifice plate defining the orifice, while the small coil urges the rod into engagement with the orifice plate only after the air valve is around one half open.

Abstract: A water spigot has a quickly attachable and detachable nozzle for sanitary, assembly and constructional purposes. The nozzle besides producing a uniform flow denys access to the valve element and its actuator thereby greatly minimizing possibility of contamination which otherwise exists by persons who are inclined to touch the valve element and/or its actuator in prior art spigots. The nozzle is quickly attachable and detachable for assembly purposes and testing in original manufactive and, if desired, in subsequent repair. The construction is such that the valve actuator, in the form of a wire, is no longer required to be as long as in prior art spigots thereby minimizing mechanical problems and resulting in a more trouble free sanitary spigot.

Abstract: A well testing system and method in which a by-pass valve is positioned in the tubing and a probe run on a line from the surface opens and closes the valve with vertical movement of the probe. The probe when landed in the valve is exposed to formation fluids and may transmit back to the surface, or may record information about the formation. The probe may also collect a sample of fluid to return to the surface with the probe.