Abstract: Forming of a valve head portion (1) of a hollow engine valve (V) comprising a material particularly satisfactory in heat resistance is performed by cold forging. On this occasion, the material with excellent heat resistance is worked to form a valve head portion semifinished product (11) having a hollow hole (S11) whose inner diameter (?11) is equal to the maximum inner diameter (?11) of a hollow hole (S1) of a finished product of the valve head portion (1), and having a diameter-increased section (111) whose maximum outer diameter (?12) is equal to the maximum outer diameter (?12) of a diameter-increased section (1a) of the finished product. Parts of the valve head portion semifinished product other than a central part to a lower part of the diameter-increased section (111) are necked down by cold forging performed a plurality of times to obtain the finished product of the valve head portion (1). This method of obtaining the finished product is provided by the present invention.

Abstract: A method for manufacturing a hollow engine valve includes a step for performing rotational plastic working on a follow engine valve body semifinished product which is configured from a shaft part and a valve umbrella part forming portion connected to the shaft part. A columnar hole part is formed from the shaft part to an enlarged diameter section of the valve umbrella part forming portion to thereby reduce the diameter of the shaft part. A necking step follows the rotational plastic working step, necking the hollow engine valve body semifinished product to thereby reduce the outer diameter and the inner diameter of the shaft part. A sealing step seals the leading end of the shaft part to obtain the hollow engine valve.

Abstract: Described embodiments are directed toward centrally-opening, leaflet valve devices and systems for transcatheter delivery having a two-piece valve body as well as methods of making and delivering the two-piece valve devices. A transcatheter valve comprises a collapsed configuration and an expanded configuration. The transcatheter valve can further comprise an everted configuration and a non-everted configuration.

Abstract: A prosthetic heart valve includes a base and a plurality of polymeric leaflets. Each leaflet has a root portion coupled to the base, and each leaflet has an edge portion substantially opposite the root portion and movable relative to the root portion to coapt with a respective edge portion of at least one of the other leaflets of the plurality of leaflets. Each leaflet includes) at least two polymers along at least one portion of the leaflet, and each leaflet has a composition gradient of each of the at least two polymers along at least one portion of the leaflet.

Abstract: A method of assembling a prosthetic heart valve includes providing a collapsible and expandable stent having an annulus section and an aortic section. The annulus section has a first diameter in a relaxed condition and a second diameter less than the first diameter in a collapsed condition. A constraint is applied to the stent to constrain the annulus section to a predetermined diameter between the first and second diameters. Applying a cuff and/or a plurality of leaflets to the stent in the constrained condition enables less material to be used. The resultant prosthetic valve is therefore able to be collapsed to a smaller diameter for introduction into a patient.

Abstract: The invention relates to a method for producing an injection valve for liquids, preferably an injection valve for injecting fuel into a combustion chamber of an internal combustion engine. The injection valve has a valve body, with a valve seat which is formed therein, and a valve needle which interacts with the valve seat in order to open and close at least one injection opening. The injection valve is produced by means of the following method steps: producing the valve body from steel, hardening the valve body, annealing a partial region of the valve body at an annealing temperature. The device for carrying out the method according to the invention has an inductive annealing generator which generates a suitable alternating current for operating a coil, in the magnetic field of which coil the valve body can be heated for annealing.

Abstract: A valve actuator assembly includes a housing having a diaphragm plate and diaphragm disposed within the housing. A stem projection downwardly extends from a bottom surface of the diaphragm plate, and the stem projection is coupled to an actuator stem disposed along a longitudinal axis. A guide member has a top wall and a center aperture that receives the stem projection, and the top wall is biased into engagement with the bottom surface of the diaphragm plate by a spring. The guide member also has a side wall that downwardly extends from the top wall, and an outer surface of the side wall is adapted to engage an inner surface of a spring housing to limit displacement of the diaphragm plate and the actuator stem in a direction normal to the longitudinal axis.

Abstract: A method for forming a valve includes forming a valve body; machining a bore by passing a tool having cutting edges along an axis into the valve body; machining a groove and face in the bore at axially spaced locations by revolving the tool about a circular circumference whose center is aligned with the bore; and supplying lubricant in a pneumatic stream through the tool to the cutting edges.

Abstract: A bi-directional valve assembly, including valves for use in closed-ended catheters or other elongate tubular devices, is disclosed. In one embodiment, a catheter assembly for insertion into a body of a patient is disclosed and comprises an elongate catheter tube including an outer wall that at least partially defines at least one lumen that extends between a proximal end and a closed distal end thereof. The catheter tube includes a valve assembly that in turn includes a linear slit valve defined through the outer wall of a distal segment of the catheter tube, and a deformation region. The deformation region includes a compliant segment disposed in the outer wall of the catheter tube and a thinned portion of the outer wall. The compliant segment and thinned portion of the deformation region cooperate to preferentially deform the outer wall and open the slit valve during aspiration through the catheter tube.

Abstract: An approach for producing a tolerance-corrected actuator for a supercharging device may include connecting a connecting element to a regulating rod of a regulating component assembly, bringing a tolerance-corrected actuator into a predefined position in response to a defined signal and adjusting a predetermined overall length of the regulating component assembly by shifting the connecting element relative to the regulating rod.

Abstract: A reversing valve comprising a valve body having an internal cavity therein and an input port, output port and first and second reversing ports. A baffle is located within the internal cavity and is configured to rotate around a pivot point within the internal cavity. At least one electromagnet is coupled to the valve body. The electromagnet is configured to cause the baffle to rotate in one of the clockwise direction or counter-clock wise direction when a voltage is applied to the electromagnet.

Abstract: The invention relates to a pipetting apparatus, in particular for pipetting a fluid sample by aspiration into a pipetting container by means of air under a pipetting pressure, said pipetting apparatus comprising: a valve arrangement having at least one valve device for setting a pipetting pressure, wherein the valve device comprises a valve chamber; at least one pump device, which is connected to the valve chamber to generate a chamber pressure in the valve chamber; a pipetting channel, to which the pipetting container can be connected, and; a bypass channel, which is open to the surrounding environment; wherein the pipetting channel and the bypass channel are each connected to the valve chamber; and wherein the at least one valve device is designed such that, to generate the desired pipetting pressure in the pipetting channel, the chamber pressure is distributed in a metered manner by the valve device between the pipetting channel and the bypass channel.

Abstract: A method of making a flow control device for controlling flow of fluid between a formation and a wellbore is provided, which method in one aspect may include: providing a member suitable for placement in a wellbore for receiving formation fluid; selecting a geometry for a flow-through region configured to substantially increase value of a selected parameter relating to the flow-through region when a selected property of the formation fluid is in a first range changes and maintain a substantially constant pressure drop across the flow-through region when the selected property of the fluid is in a second range; and forming the flow-through region on the member to provide the flow control device.

Abstract: A fluid transport apparatus includes a main unit and a replacement unit that can be removably attached to the main unit. The replacement unit includes a tube for transporting a fluid, and a plurality of fingers for pressing against and occluding the tube, the plurality of fingers being arranged along the tube. The main unit includes a cam for pressing the plurality of fingers successively in a transport direction of the fluid. The tube, the plurality of fingers and the cam are arranged in a layered arrangement along a rotation axis direction of the cam.

Abstract: A solenoid valve includes a core sleeve, in which a valve needle can be arranged in a longitudinally displaceable manner. The core sleeve has at least one radial opening in the casing wall thereof. The core sleeve further has a first sub-sleeve and a second sub-sleeve that axially adjoins the first sub-sleeve. The radial opening in the connecting region is designed as an end face axial recess in at least one of the sub-sleeves. A method for producing such a solenoid valve is also disclosed.

Abstract: Method for adjusting the throttling action of a valve comprising a valve body with at least one through-channel for a working medium, where the working medium is throttled by at least one valve disk which covers the throttle channel. By making use of the effect of the heat of a laser beam to change the elastic pretension of the disk, deviations from a predetermined throttling action are minimized. The laser beam is used to cause partial local melting in the minimum of one valve disk, the heat thus introduced having the effect of working at least one defined bending axis into the disk.

Abstract: A crank for a valve linkage system includes a pin sleeve having a bore for receiving a connecting pin to connect the crank to a link; a shaft sleeve having a bore for receiving a shaft; an arm between the pin bore and shaft sleeve; and a first stiffening rib extending from the shaft sleeve toward the pin bore.

Abstract: A hydraulic valve arrangement includes a manifold and a poppet. The manifold defines a bleed ring that surrounds a bore and has an angled surface. The manifold also defines an annular recess around the bleed ring that provides a relief region. The poppet is slidably disposed within the bore and is structured to close a main flow path between the first and second ports when the poppet is in a first position and the poppet being structured to at least partially open the main flow path when the poppet slides away from the first position. The poppet defines an angled contact surface that is configured to engage the angled contact surface of the bleed ring when the poppet is in the first position.

Abstract: The valve is switchable between metering, full flow and shut off configurations. The preferred embodiments of the inventions include a metering-full flow, a metering-shut off and metering-shut off-full flow valves.

Abstract: In accordance with various embodiments, a plug head assembly is provided comprising a ceramic plug head having a frustroconical geometry, wherein the ceramic plug head has a proximal terminus and a distal terminus, wherein the ceramic plug head has a first coefficient of thermal expansion (CTE), a sleeve having a frustroconical geometry conforming to the ceramic plug head and a second CTE, wherein the second CTE is greater than the first CTE, a distal retainer having a frustroconical geometry conforming to the sleeve, the distal retainer having a first engagement portion for engaging the a proximal retainer, the proximal retainer having a second engagement portion for engaging the distal retainer, and a base that couples with the proximal retainer.

Abstract: An IV flow rate regulator for precision dosage of medical liquids including a first part, a second part with an integrated outlet tubular connector and a mating attachment part with an integrated inlet tubular connector, coupled to one another in a rotatable manner with a first elastic gasket in a depression in the base wall of the second part, a second elastic gasket in a depression in the base wall of the mating attachment part, a dosing passage groove provided between the first and second gaskets, the dosing groove opening progressively the communication between the inlet tubular connector and the outlet tubular connector by rotation of the first and second parts. Also provided is a method for the fabrication of the said IV flow regulator.

Abstract: Embodiments of a lightweight, high temperature airborne valve are provided. In one embodiment, the airborne vale includes a valve element and a flowbody. The flowbody is formed at least partially from a titanium aluminide alloy and has a flow passage therethrough in which the valve element is movably mounted. Embodiments of a method for producing such a lightweight, high temperature airborne valve are also provided. In one embodiment, the method includes the steps of forming a lightweight flowbody at least partially from a titanium aluminide alloy, hot isostatically pressing the lightweight flowbody, and machining the lightweight flowbody to desired dimensions.

Abstract: There is provided a vacuum valve used in a vacuum storage container, having a simplified configuration, being installable in the container, and improved in vacuum maintenance. The vacuum valve includes a base having a hole; a sealing film attached to a flexible film and covering the hole between the base and the flexible film; and the flexible film attached to an upper surface of the base and the sealing film using an adhesive layer, wherein the flexible film is movable to an open position, and when the flexible film is disposed in the open position, the sealing film attached to the flexible film causes the hole to be open and an air path is formed between the sealing film and the base such that air passes therethrough.

Abstract: A self-locking T-piece connects an attachment to a breathing gas line. The self-locking T-piece has a line section (2), a connection line (4) branching off therefrom, a movable valve body (10) with a valve disk (12), and a valve seat (14). The valve body (10) is prestressed by a spring (16) into a position to seal the connection line (4) against the line section (2), with the valve disk in the valve seat, and moves out of the sealing position when connecting the attachment to the connection line. The valve body (10) is elastically deformable such that it can be advanced through the connection line (4) and the valve seat (14), while undergoing elastic deformation, and returns to its original shape during the entry of valve disk (12) into the line section, in which it has a sufficient extension to be able to cover the valve seat for sealing.

Abstract: A valve, in certain embodiments, includes a drive shaft configured to couple to a fluid control component and having an interlace material at the joint between the drive shaft and the fluid control component. A valve, in other embodiments, includes a fluid control component configured to receive a drive shaft and having an interlace material at the joint between the fluid control component and the drive shaft. A valve, in further embodiments, includes a drive shaft having a mechanical locking system and a fluid control component coupled to the drive shaft at a joint, wherein the spline aids in coupling the fluid control component to the drive shaft.

Abstract: Provided are a valve unit, a microfluidic device including the same, and a method of fabricating the valve unit.

Abstract: A slide gate for controlling fluid flow having improved slide gate seals.

Abstract: The present invention minimizes the assembly time of a dispenser head by inserting a rigid seal retaining element. The seal retaining element comes in different configurations thus allowing a variety of compressed gas cartridge dispensing options. Additional features are integrated into a molded dispenser head thus requiring fewer components to accomplish a useable dispenser thus reducing manufacturing costs. Reliance on conformable plastic allows for relaxed dimensional tolerances. This method of making a dispenser head can equally apply to threaded or non-threaded lance housings.

Abstract: When manufacturing a disk valve having a ring-shaped elastic seal member fixed to one side thereof for use in a cylinder type hydraulic shock absorber, a disk valve blanked from a plate material is set on a bottom of a lower mold member that is curved to be convex on one side. Mold clamping is performed to form a cavity by a cylindrical mold part and to press the disk valve with a press part to deform the disk valve into a shape that is convex on one side. In this state, a rubber material is filled into the cavity through a passage and vulcanized and cured to mold and fix an elastic seal member to the disk valve. At this time, the disk valve is deformed in a direction in which the curvature reduces by shrinkage of the rubber material. Accordingly, it is possible to reduce variations in flatness of the disk valve and hence possible to obtain stable damping force characteristics.

Abstract: A method of producing a diaphragm damper 1 having a high pressure chamber 3 comprised of two diaphragms 2 with flanges 6 welded together and charged inside with a high pressure gas. The diaphragms 2 are made of magnetically attractable thin metal sheets. A pair of jigs 30, 40 provided to face each other inside the pressure vessel 20 hold the diaphragms 2 by magnetic force. The pressure vessel 20 is sealed and evacuated, then the pressure vessel 20 is charged and pressurized by a mixed gas including helium. After this, the pair of jigs 30, 40 are made to approach each other to make the flanges 6 of the pair of diaphragms 2 come into close contact. Inside the pressure vessel 20, the jigs 30, 40 are simultaneously rotated to rotate the pair of diaphragms 2 and a laser beam is fired at the flanges 6 of the diaphragms 2 to weld the flanges 6 over their entire circumferences.

Abstract: A valve, including a valve opening and a valve plate arranged to seal the valve opening in a closed state by means of compressing a sealing structure is provided, wherein the sealing structure includes an uncompressed dimension in a compression direction of less than 100 ?m.

Abstract: A product transfer valve (1) includes a valve body (3), an inlet port (2), an outlet port (18). A safety interlock mechanism includes a segmented collar (22) with internal threads (23) for mounting the valve to a connection. A safety collar (6) is axially movable between a valve open position and a valve closed position, and causes movement of the segmented collar. An interference member (12) engages the safety collar (6) to prevent inadvertent radial outward movement of the internal threads on the segmented collar until the safety collar is moved to the valve closed position.

Abstract: A shut-off valve for the plumbing sector for shutting off a line through which a fluid can flow that preferably includes a housing having at least two connecting pieces. A flow path is defined from one of the connecting pieces through the housing to another of the connecting pieces, and a shut-off body is disposed rotatably in the housing with a single shut-off section running crosswise to the flow path. Preferably, the shut-off segment is constituted as a spherical segment, and the shut-off body can be moved between a closed position in which the flow path is completely blocked to only one of the connecting pieces and an open position in which the flow path is completely clear. A switching shaft which is rotatably mounted in the housing and is connected in a rotationally fixed manner at its one end to the shut-off body.

Abstract: A check valve includes a housing, a bore, and a liftably movable valve body which is spring-loaded at least after a small axial travel of the valve body and tightly contacts a valve seat. The bore is constructed as a stepped bore, the bore section of smaller diameter having the valve seat, and the bore section of larger diameter receiving the liftably movable valve member. A ball which is held captive by a holding element arranged in the bore is provided as valve body. The valve seat has a contour corresponding to the valve body in the area of the contact surface of the valve body.

Abstract: Example methods, apparatus and articles of manufacture to calibrate valve-mounted instruments, such as a position controllers and/or a position transmitter, are described. An example method disclosed herein includes securing a position of a flow control member of a control valve assembly to prevent movement of the flow control member and installing a controller to the control valve assembly.

Abstract: An integrated microfluidic check valve has a first chamber having inlet and outlet ports and divided by a barrier the said inlet and outlet ports into first and second subchambers. A membrane forms a wall of the first chamber and co-operates with the barrier to selectively permit and prevent fluid flow between the inlet and outlet ports. A second chamber adjoining the first chamber and has a wall formed by the membrane. A microfluidic channel establishes fluid communication between the second chamber and the first subchamber. The membrane deflects to permit fluid flow around the barrier when the pressure in the first subchamber is lower than the pressure in the second subchamber. Two such valves can be combined into a peristaltic pump.

Abstract: Positive displacement using a connector with dual diaphragms is provided. For example, the connector includes a single fluid flow path, an air chamber and a valve. The single fluid flow path is configured for delivering fluid to a person and configured for receiving fluid from a person. The air chamber configured for expelling air from the air chamber when an actuator is inserted into the connector and for receiving air into the chamber when the actuator is removed from the connector. The valve plug comprises two diaphragms that separate the air chamber from the single fluid flow path. The valve plug is configured for creating positive displacement by returning the valve plug to its uncompressed state when the actuator is removed from the connector.

Abstract: A method for at least providing at least a first and a second assembly for manufacturing, respectively, a first reference pressure chamber (1A) which in use in a pressure control device encloses a gas such that the gas is held under a first reference pressure, and a second reference pressure chamber (1B) which in use in a pressure control device encloses a gas such that the gas is held under a second reference pressure, wherein the first reference pressure differs from the second reference pressure, and wherein the pressure control device is suitable for feeding through, on the basis of the reference pressure, a fluid from a first space (I) in which a relatively high pressure prevails to a second space (II) in which a relatively low pressure prevails, the method comprising providing the first and the second assembly such that each assembly for forming the respective reference pressure chamber comprises a casing (3A, 3B) and a plunger part (11A, 11B), while the casing is closed at a first end and the plunger p

Abstract: A valve for a ball includes a casing and a core. The core is arranged at least partially inside the casing. The core comprises a first sealing area with a plurality of sections which have alternating concave and convex curvatures.

Abstract: A needle for use in a needle valve, such as the needle valve of a fuel injector, comprises a tip section (2), a first guide section (1a) and a second guide section (3). The tip section (2a) has a needle tip. The first guide section (1a) is remote from the needle tip. The second guide section comprises a tube, wherein the first guide section (1a) and the tip section (2a) are comprised in an integrated inner needle component (7) extending through the tube (3). A method of manufacturing such a needle is also described.

Abstract: A proportional valve (1), including a piston guide sleeve (4) and a valve piston (3) that can be moved in the piston guide sleeve (4), and further including a check valve (13) arranged in a pressure medium inlet (10) to the proportional valve (1). According to the invention a proportional valve (1) is provided, in which the adaption of the check valve (13) to the proportional valve (1) is improved with respect to the prior art. This is achieved in that the check valve (13) is arranged in an annular gap (14) surrounding the piston guide sleeve (4) in a region of the pressure medium inlet (10).

Abstract: A microfluidic system includes a bubble valve for regulating fluid flow through a microchannel. The bubble valve includes a fluid meniscus interfacing the microchannel interior and an actuator for deflecting the membrane into the microchannel interior to regulate fluid flow. The actuator generates a gas bubble in a liquid in the microchannel when a sufficient pressure is generated on the membrane.

Abstract: Disclosed is a method—for producing an engine valve (V) filled with metallic sodium (Na) within by means of: forming a stem section (S), which has a hollow section (H), at an intended size by successively drawing the stem section (S) using dies (D1, D2, Dx, Dx+1, Dn) in a manner so as to causing the size of the outer diameter and the inner diameter of the stem section (S) to contact in a stepwise fashion; and inserting metallic sodium (Na) into the hollow section (H) of the stem section (S)—wherein after drawing the stem section (S) until the inner diameter of the hollow section (H) of the stem section (S) has become a prescribed size (steps S11-S15) and then inserting the block-shaped solid metallic sodium (Na) into the hollow section (H) of the stem section (S) (step S16), the stem section (S) is further drawn (steps S17 and S18).

Abstract: A fuel injector apparatus and method is provided for use in a fuel injection system of an internal combustion engine that includes a body, a valve seat, closure member, and an orifice plate. The valve seat comprises the intersection of two angled surfaces with a radius before assembly of the fuel injector. During assembly of the fuel injector, a member presses against the radius edge of the sealing surface of the valve seat to create an oblique third sealing surface or sealing band that is coined into the valve seat. The sealing band provides an improved seal between the valve closure member and the valve seat which operates to prevent leakages of fuel in the fuel injector.

Abstract: Embodiments and methods are disclosed herein that relate to a valve assembly. The valve assembly includes a housing having a passage formed therethrough, and a valve ball having a through hole and disposed in the housing, in which the valve ball is rotatable between an open position that has the through hole aligned with the passage and a closed position that has the through hole misaligned with the passage. The valve assembly further includes a first seat having a first sealing surface and disposed in the housing adjacent to the valve ball, and a second seat having a second sealing surface and disposed in the housing adjacent to the first seat such that the first sealing surface of the first seat is disposed adjacent to the second sealing surface of the second seat. At least one of the first sealing surface of the first seat and the second sealing surface of the second seat comprises an arcuate surface.

Abstract: The method for manufacturing a solid housing, in particular a valve housing for an electromagnetically operable valve, is characterized in that the following method steps are used: a) providing a sheet metal strip made of a magnetic or magnetizable material, b) introducing an additive into a middle area of the sheet metal strip and fusing there for forming a non-magnetizable structure, c) cutting the sheet metal strip into a sheet metal piece of desired width, d) deforming the sheet metal piece into a sleeve shape, e) mutual fastening of the cut edges now facing each other and running in the longitudinal direction of the sleeve for forming a sleeve blank, f) final machining of the sleeve blank until a desired geometry of the housing is achieved. The housing is suitable in particular for use in fuel injectors in fuel injector systems of mixture-compressing spark-ignition internal combustion engines.

Abstract: A valve block assembly (300) for a blow molding system is provided. The valve block assembly (300) comprises a valve block housing (301) and a stretch rod (303) movable along a longitudinal axis (324) within a stretch rod bore (304) formed in the valve block housing (301). The valve block assembly (300) also includes one or more valves (302a) coupled to the valve block housing (301) and spaced away from the stretch rod (303). Each of the one or more valves (302a) includes a valve piston (323) with a longitudinal axis (325) substantially parallel to the longitudinal axis (324) of the stretch rod (303).

Abstract: An automotive engine valve stem, engine valve and method of producing both. The valve includes a head and a stem joined to the head. Lightweight, high-temperature materials, such as titanium-based materials may be used to make up at least a the majority of the valve. These materials are combined with fabrication techniques that may vary between the head and the stem, where at least a part of the valve is made by dynamic magnetic compaction. While a majority of the stem may be made from a titanium-based powder material, its tip may be made of a high strength hardened material, such as a steel alloy. The valve head may be made by single press and sintering, double press and sintering, forging and machining, forging and sintering, and dynamic magnetic compaction and sintering.

Abstract: A pressure control valve assembly including a valve body with a valving cavity, a metal insert, a member and ball, a plastic internal ball guide, and a plug. The metal insert, which is received within the valving cavity, includes an exhaust port, a pressure control port, a supply port, and a plug-receiving end. The plastic internal ball guide is included within a portion of the metal insert. The member extends within a portion of the insert and is movable with respect to the exhaust port, the member moving a ball with respect to a supply port. In an embodiment, a plug is received within the plug-receiving end of the insert. A method for making a valve body for a valve assembly is also disclosed.

Abstract: A multiple coil solenoid valve (100) is provided. The multiple coil solenoid valve comprises a first solenoid coil (101A) and at least a second solenoid coil (101B). One or more magnetic cores (210) are positioned at least partially between the first and second solenoid coils (101A, 101B). The multiple coil solenoid valve (100) also includes one or more movable armatures (211) movable between a first position and at least a second position. The one or more movable armatures (211) are positioned at least partially between the first and second solenoid coils (101A, 101B).