Abstract: A vacuum valve for high/ultra-high vacuum systems includes a valve housing defining a passage connecting a first and a second opening of the housing. A valve body and a complementary seat is disposed in the passage, the valve body and/or the seat including a seal and the valve body being movable in a linear axial direction along between an open position and a closed position. The valve body cooperates with the seat in the closed position so as to close the first opening gas-tightly. An electromechanical actuation unit for actuating the valve body includes an electric motor and a mechanical conversion unit with an input portion drivingly connected to the motor and an output portion drivingly connected to the valve body. The conversion unit converts a rotational output of the electrical motor into a linear movement of an output portion to move the valve body in the axial direction.

Abstract: The present technology relates to intraocular shunting systems and methods. In some embodiments, the present technology includes intraocular shunting systems that include a drainage element having an inflow portion configured for placement within an anterior chamber of the eye outside of an optical field of view of the patient and an outflow portion configured for placement at a different location of the eye. The system can also include a flow control assembly having a rotational control element operably coupled to the drainage element. The flow control assembly can further include an actuation structure coupled to the rotational control element and configured to selectively change an orientation of the rotational control element. An amount of fluid through the inflow portion and/or the outflow portion can vary based on the selected orientation of the rotational control element.

Abstract: Implantable physiological shunt systems and related fluid flow control devices and accessories for use therewith. Devices, systems and methods relating to implantable medical fluid flow control devices, rotors and magnets with increased resistance to inadvertent setting changes. Devices, systems and methods relating implantable medical fluid flow control devices, rotors and magnets which provide improved magnetic coupling to fluid flow control device accessories such as adjustment tools.

Abstract: An externally programmable shunt valve assembly that includes a motor having a rotor that is operable in response to an externally applied magnetic field and configured to increase or decrease the working pressure of the shunt valve assembly. The motor may further include a position sensing mechanism that allows a position of the rotor, and associated pressure setting of the valve, to be determined using an external magnetic sensor. In certain examples the motor further includes a mechanical brake that is magnetically operable between a locked position and an unlocked position and which, in the locked position, prevents rotation of the rotor.

Abstract: Disclosed is a valve assembly operable to selectively control a flow or passage of a fluid. The valve assembly may be applied to any appropriate mechanism such as a hydrocephalus shunt, fluid draining sewage system, or tank holding system. The valve assembly disclosed may include a selected profile for various applications.

Abstract: Implantable physiological shunt systems and related fluid flow control devices and accessories for use therewith. Devices, systems and methods relating to implantable medical fluid flow control devices, rotors and magnets with increased resistance to inadvertent setting changes. Devices, systems and methods relating implantable medical fluid flow control devices, rotors and magnets which provide improved magnetic coupling to fluid flow control device accessories such as adjustment tools.

Abstract: An externally programmable shunt valve assembly that includes a magnetic rotor that is operable in response to an externally applied magnetic field and configured to increase or decrease the working pressure of the shunt valve assembly in finite increments.

Abstract: A system includes a choke valve, an actuator configured to adjust a position of the choke valve, a variable frequency drive configured to adjust a speed at which the actuator adjusts the position of the choke valve, and a controller configured to receive first feedback indicative of a fluid pressure upstream of the choke valve, compare the first feedback to a first predetermined pressure range, and instruct the variable frequency drive to send electricity to the actuator at a first frequency when the first feedback is outside of the first predetermined pressure range, where the variable frequency drive is configured to control a speed and a direction of the actuator such that the actuator adjusts the position of the choke valve to a first position at a first speed, and where the first speed is based at least on a difference between the first feedback and the first predetermined pressure range.

Abstract: A self-adjusting device for controlling the clearance (C), especially in the radial direction, between rotating and stationary components of a thermally loaded turbo machine, changes clearance (C) in a linear and/or non-linear way during transition of the machine between standstill and steady-state operation. Simple and effective control can be achieved, even in the case of a nonlinear variation of the clearance during transitional operation, by the self-adjusting device including at least two different driving elements (A, B) to move the rotating and fixed components relative to each other in order to change the clearance (C) between them, and by the different driving elements (A, B) being configured to be activated at different times during the transition of the machine.

Abstract: A check valve comprises a housing, a fluid passage, a seat, a valve member and a stop. The fluid passage extends through the housing. The seat is disposed in the fluid passage. The valve member is positioned in the passage to engage the seat. The stop extends through the housing to engage the valve member. The stop is accessible from outside the housing to adjust a distance the valve member can travel from the seat. In one embodiment, the stop includes a variable stop feature, such as an offset pin or a cam. In another embodiment, the stop includes a pump control valve. In yet another embodiment, the housing includes markings to indicate a position of the stop. The valve member comprises a ball or a poppet in different embodiments.

Abstract: A multifunction relief valve includes a relief chamber having an introduction port and a relief port for introducing and relieving pressure fluid; a back pressure chamber formed on one end side of the relief chamber; a piston which is movably provided in the back pressure chamber and divides the back pressure chamber into a first back pressure chamber and a second back pressure chamber; a first spring which is provided in the first back pressure chamber and exerts a biasing force in a direction in which the relief port is closed; a second spring which is provided in the second back pressure chamber and biases the piston in the direction in which the relief port is closed; and a pilot pressure supply port formed in the first back pressure chamber. The pressure fluid introduced into the first back pressure chamber via the pilot pressure supply port changes the relief pressure.

Abstract: A hydraulic manifold has features adapted to the needs of hybrid vehicle applications. In one embodiment, multifunction valves selectively regulate fluid flow among primary and auxiliary flow paths. A normally closed butterfly valve is biased by a relatively small secondary biasing force against rotation in first and second (opposite) directions, and by a relatively large principal biasing force against rotation in the first direction past a transitional angular position at which the principal biasing force takes effect. An actuator selectively controls the transitional angular position and the magnitude of the principal biasing force. In the first direction, flow must overcome only the secondary biasing force to pass the valve. In the second direction, any flow sufficient to overcome the secondary biasing force but not the principal biasing force will divide into a first flow passing the valve and a second flow induced to enter an auxiliary path upstream.

Abstract: A pressurized gas containing system has a cowling and mounting ring which supports a valve and regulator on a cylinder containing gas under pressure.

Abstract: A valve unit capable of being implanted in a patient and having adjustable performance settings, such as pressure settings and/or flow control, to regulate passage of a bodily fluid. A casing defines a port for the bodily fluid, and a valve mechanism positioned at the port includes a movable valve member. The valve unit further includes a rotor disposed at a first location in the casing and having an axle which turns about an axis of rotation. The rotor defines a plurality of arcuate, radially flat cam surfaces. Each cam surface occupies an arc about the axis of rotation. A spring arm unit is disposed at a second location in the casing having a cam follower arm in slidable contact with the cam surfaces of the rotor and having a resilient spring element applying a closing effect with the movable valve member to establish a performance setting for the valve unit.

Abstract: A vacuum regulator has a vacuum range controller and a manifold including an inlet opening, a vacuum source connection, and a bleed orifice. The vacuum range controller includes a regulator stem having a metering tip, a stem body, and an adjustment rod. The metering tip is selectively positioned against the bleed orifice. The vacuum range controller further includes a vacuum adjuster having an adjustment collar and a resilient member which are coaxially disposed on a portion of the regulator stem. An adjustment knob engages the adjustment rod for concurrent rotational movement therewith.

Abstract: A fluid dispensing system includes a pump assembly for pressurizing a low cost container, the container non reversibly connected to a coupler module. A wand assembly is releasably connected to the coupler module. A discharge conduit fluidly connects the wand assembly to the container to displace a check valve in the pump assembly to permit flow from the pump assembly. The wand assembly includes a grip body slideable relative to the discharge conduit between a retracted storage position and an extended operable position.

Abstract: A pressurized gas containing system has a cowling and mounting ring which supports a valve and regulator on a cylinder containing gas under pressure.

Abstract: A cylinder valve includes: a single valve member in the form of a spring loaded shuttle, the spring exerting a pressure on the shuttle in a valve-closing direction; a valve seat against which the valve member bears in its valve-closing position; a guide defining a channel in which the shuttle is able to travel; a stop member able to be translated in the channel into and out of a position in which the stop member holds the valve member in its valve-closing position; and a valve body which is engaged by the guide, the guide being able to be translated into a position in which the shuttle cannot be brought to bear against the valve seat.

Abstract: A pressure-variable valve device which is adapted to be embedded in the human body and which is capable of changing a difference in pressure between an inlet-side and an outlet-side duct, the valve device including a rotating member capable of rotating around a central axis in directions to vary a set pressure for a valve, and a rotation control mechanism for controlling the rotation of the rotating member, wherein the rotation control mechanism includes permanent magnet structures supported by the valve-device main body so as to be capable of making a linear reciprocal translation in directions, and displacement transmission mechanisms, for rotating the rotating member in the direction corresponding to the direction of the translation of the permanent magnet structures. A set-pressure adjusting device includes a magnetic field generating mechanism which generates a magnetic field in which the permanent magnet structures cause the rotating member to rotate in the same direction.

Abstract: A valve can varied in operating pressure and stopped in opening and closing by an efficiently movable actuator due to feeding of electric power without malfunction due to disturbance of magnetism, impact or temperature. A variable pressure valve is provided with a shape memory alloy spring. The shape memory alloy spring is raised in temperature and varied in length by a secondary coil that is electromagnetically given power from a primary coil of a control probe. When the shape memory alloy spring varies in length, a feed ratchet performs linear movement to rotate a cam wheel. The cam wheel has a cam with which an urge spring and a rectifying lever at its one end is engaged. The urge spring and rectifying lever at their other ends engage a ball valve to vary an urge force on the ball valve due to rotation of the cam wheel.

Abstract: A pressure-variable valve device which is adapted to be embedded in the human body and which is capable of changing a difference in pressure between an inlet-side and an outlet-side duct, the valve device including a rotating member capable of rotating around a central axis in directions to vary a set pressure for a valve, and a rotation control mechanism for controlling the rotation of the rotating member,wherein the rotation control mechanism includes permanent magnet structures supported by the valve-device main body so as to be capable of making a linear reciprocal translation in directions, and displacement transmission mechanisms, for rotating the rotating member in the direction corresponding to the direction of the translation of the permanent magnet structures. A set-pressure adjusting device includes a magnetic field generating mechanism which generates a magnetic field in which the permanent magnet structures cause the rotating member to rotate in the same direction.

Abstract: A valve can varied in operating pressure and stopped in opening and closing by an efficiently movable actuator due to feeding of electric power without malfunction due to disturbance of magnetism, impact or temperature. A variable pressure valve is provided with a shape memory alloy spring. The shape memory alloy spring is raised in temperature and varied in length by a secondary coil that is electromagnetically given power from a primary coil of a control probe. When the shape memory alloy spring varies in length, a feed ratchet performs linear movement to rotate a cam wheel. The cam wheel has a cam with which an urge spring and a rectifying lever at its one end is engaged. The urge spring and rectifying lever at their other ends engage a ball valve to vary an urge force on the ball valve due to rotation of the cam wheel.

Abstract: In a vacuum valve including a main flow path and an auxiliary flow path for connecting a chamber port and a pump port in parallel, a main valve body for opening and closing a main valve seat in the main flow path, and an auxiliary valve body for opening and closing an auxiliary valve seat in the auxiliary flow path, the main valve body includes, in addition to a valve sealing member for opening and closing the main valve seat in a poppet manner, a flow rate adjusting portion in a gradually-tapered shape to be fitted in an inner hole of the main valve seat and the flow rate adjusting portion functions to gradually increase an exhaust flow rate when the main valve body opens after opening of the auxiliary valve body.

Abstract: A smooth exhaust valve includes a main flow path having a large cross-sectional area and an auxiliary flow path having a small cross-sectional area for connecting a first port and a second port in parallel, a main valve body for opening and closing the main flow path, an auxiliary valve body for opening and closing the auxiliary flow path, a first piston for opening and closing the main valve body, a second piston for opening and closing the auxiliary valve body, a first spring device for repulsing the main valve body in a valve-closing direction, a second spring device for repulsing the auxiliary valve body in a valve-closing direction, and an adjusting rod mounted to a valve casing so as to be operated from outside to move forward and rearward and for changing a compressed amount of the second spring device by operation of forward and rearward movements of the adjusting rod to adjust a repulsing force of the second spring device.

Abstract: A pressure-variable valve device which is adapted to be embedded in the human body and which is capable of changing a difference in pressure between an inlet-side and an outlet-side duct, the valve device including a rotating member capable of rotating around a central axis in directions to vary a set pressure for a valve, and a rotation control mechanism far controlling the rotation of the rotating member wherein the rotation control mechanism includes permanent magnet structure supported by the valve-device main body as to be capable of making a linear reciprocal translation in directions, and displacement transmission mechanisms, for rotating the rotating member in the direction corresponding to the direction of the translation of the permanent magnet structures. A set-pressure adjusting device includes a magnetic field generating mechanism which generates a magnetic field in which the permanent magnet structures cause the rotating member to rotate in the same direction.

Abstract: A variable pressure valve apparatus has a case having a fluid inlet port and a fluid discharge port, a valve element for closing the fluid inlet port, a spring member disposed in the case for biasing the valve element to close the fluid inlet port, and a cam wheel for undergoing rotation to deform the spring member and thereby vary a biasing force applied to the valve element by the spring member. A feed ratchet is disposed in the case for undergoing movement to rotate the cam wheel. A shape memory alloy or a piezoelectric element undergoes extension movement to move the feed ratchet to thereby rotate the cam wheel to deform the spring member.

Abstract: A valve apparatus of a valve system includes a long-sized elastic member a base end portion of which is fixed and a front end portion of which is brought into contact with a valve element and a movable member capable of moving in B1 and B2 directions actually linearly along a longitudinal direction B of the elastic member between both end portions of the elastic member and having a fulcrum portion for flexing the elastic member in C direction between the both end portions of the elastic member. The movable member is constituted by a slider linearly moved in accordance with a mover of a linear step motor element or rotation of a rotor of a rotary type step motor element.

Abstract: A pressure-variable valve device which is adapted to be embedded in the human body and which is capable of changing a difference in pressure between an inlet-side and an outlet-side duct, the valve device including a rotating member capable of rotating around a central axis in directions to vary a set pressure for a valve, and a rotation control mechanism for controlling the rotation of the rotating member, wherein the rotation control mechanism includes permanent magnet structures supported by the valve-device main body so as to be capable of making a linear reciprocal translation in directions, and displacement transmission mechanisms, for rotating the rotating member in the direction corresponding to the direction of the translation of the permanent magnet structures. A set-pressure adjusting device includes a magnetic field generating mechanism which generates a magnetic field in which the permanent magnet structures cause the rotating member to rotate in the same direction.

Abstract: The present invention relates to an excess flow valve system having a sliding poppet within a chamber with an orifice at one end, wherein the closing flow rate settings can be adjusted. Precise adjustments can be made externally by turning a threaded member extending through the valve, which causes a retainer, threadably located on the member, to move laterally within the chamber. This movement causes an angled surface on the retainer to engage and slide in relation to a similarly angled surface on the poppet. As the poppet is urged toward the retainer by a coiled spring, the poppet is moved longitudinally within the chamber, either toward or away from the orifice. Turning the threaded member enables the maximum travel distance of the poppet, and therefore, the threshold flow rate of the valve, to be precisely set.

Abstract: An adjustable pressure limiting valve having a non-linear biasing means. The valve has a movable valve member that can be moved to an open position by a predetermined pressure and a closed position on a valve seat. A rotating control knob is rotated by the user to adjust the bias acting against the movable valve member toward the closed position to, in turn, set the pressure at which the valve opens. A rotating cylindrical drum rotates along with the control knob and has a helical groove formed in its exterior and a pair of fixed pins that ride in the helical groove. When the cylindrical drum is rotated, the fixed pins riding in the helical grove cause the cylindrical drum to move along its longitudinal axis to compress or decompress a spring acting against the movable valve member. The pitch of the helical groove is designed so as to create a non-linear relationship between the rotational movement of the control knob and the longitudinal movement of the cylindrical drum.

Abstract: A pressure cooker pressure regulator having at least two operating thresholds, the regulator being of the type comprising a valve body fixed to the lid of a pressure cooker and having a valve seat formed therein, and a needle carrying a rating mass and bearing against the seat, the regulator is such that the needle is slidably mounted relative to the rating mass, that a spring is interposed between the needle and the rating mass, and that means are provided for adjusting the force exerted by the spring on the needle and comprising means selectively implemented to oppose upward displacement of the rating mass relative to the valve body under the effect of pressure applied to the needle via the seat.

Abstract: A device for charging sever line traps automatically upon decrease in main line water pressure comprising a branch line having a piston valve member telescopically received over the end of an adjustable tubular member, the piston having a first seat for sealing engagement with the end of the tubular member under normal pressure conditions in the main line and a second seat for sealing engagement with the inlet end of the chamber in which the piston and tubular member are mounted when the pressure in the main line is shut off. The piston being unseated from both the end of the tubular member and the end of the chamber, thus permitting flow to the trap, when the main line water pressure is decreased. The piston includes a metering pin for metering the flow of water through the tubular member. Provision also is made for making running adjustments to the valve during its service life as required to compensate for changes in house line pressure.

Abstract: Axial displacement between two components of a valve occurs as a result of relative rotation through the cooperation of helical ramps. Preferably another pair of helical ramps is provided concentric with the first but angularly offset 180.degree. with the result that when the components are at maxinum axial separation the residual contact between the ramps of each pair (shaded areas in FIG. 5e) will be on opposite sides of the axis x of rotation and prolongation, thus preventing tilting of the one component out of axial alignment with the other component. In other constructions more than two pairs of ramps are employed. The ramp means of the invention replaces a screw-thread to provide adjustment of the loading of a valve spring and permits the use of more economical manufacturing and assembly techniques.

Abstract: An entirely uniformly heated responsive cooker comprising an inner pot and an outer pot, wherein the inner pot neither directly touches the heating source nor the wall portion of the outer pot by means of exhalation valve means capable of adjusting proper pressure and thermal energy existing in the outer pot according to the cooking requirements of different foods, resulting in the food in the inner pot being entirely and evenly heated by thermal energy so that the cooking time is reduced, safety is ensured, and the original flavor of food is preserved to effectively achieve the object of energy-saving and economy.

Abstract: An adjustable air pressure valve for placement in a compressed air hose. Positioning a knob determines the pressure exerted by a spring on a valve member which allows air above a predetermined pressure to escape from the hose to the atmosphere. The knob is incrementally moveable to provide incremental pressure changes.

Abstract: The invention provides a spray gun for liquids and more especially liquid coatings such as paints and varnishes, comprising a liquid container, a housing, a pump for the supply of the liquid from the liquid container to a spray nozzle via a spring loaded outlet valve, and a return duct connecting the outlet of the outlet valve with the container and having an adjustable valve therein. Pumping may be caused to take place by switch means on the handle. For adjustment of the further valve, which may be preferably completely shut, there is an adjustment member in the front part of the spray gun on the jet side thereof, which is decoupled from the switching on means and, while being able to be steplessly adjusted, is able to remain in each setting of its own accord. This makes it possible for the spray jet to be modified readily without interrupting spraying and even when the spraying density is very low it possible to ensure an even spray cone.

Abstract: A fluid pressure control valve and a fluid control system (such as for beverage dispensing) with such a valve has a beverage passage 3, pressure fluctuations in which are detected by a diaphragm 17 to displace a sensing member 15 axially against spring loading 23. Spring 23 reacts on thrust member 22 which is adjustable axially through a cam mechanism 25/26 to vary the biasing force of spring 23. A valve member 20 spring loaded at 21 relative to thrust member 15 normally closes an exhaust port 19 to an air or other gas passage 5 through which gas passes under pressure to be injected into the beverage from passage 3. An increase in beverage pressure in passage 3 displaces sensing member 15 to increase the spring biasing 21 on the closure member 20 and reduce the proportion of air which can escape to atmosphere from passage 5 through exhaust port 19 to provide an increase in air flow into the beverage.

Abstract: Relief valve facilitating the underwater balancing of scuba divers' inflatable articles, which is finely adjustable and extremely responsive, and is designed to ensure a high functionality by using simplified components to minimize the manufacturing costs.

Abstract: A valve assembly for the control of pressurized fluids. The assembly comprises a casing housing a valve chamber with communicating inlet and outlet ports. A valve seat and valve-operating subassembly is associated with one of the ports. The valve-operating subassembly comprises a valve body threaded into the casing adjacent the valve seat. The valve body has an axial bore which receives a headed shaft having a seal washer mounted on its head in separable engagement with the valve seat. Resilient means, e.g. a coil spring, urges the washer in the direction of engagement with the valve seat with a force less than the force of the pressurized fluid introduced into the chamber. The shaft and/or seal washer preferably are mounted for free rotation to minimize scuffing of the washer during operation of the valve.

Abstract: A surgically-implantable shunt valve in which the popping pressure is adjusted in finite increments by application of an external magnetic field.

Abstract: A pressure control valve including a valve, a spring for pressing the valve, and a power input means for compressing the spring further comprises a backup force-generating mechanism for producing and directing a backup force counter to the direction in which the reaction force due to the compression of the spring is exerted on the input means, so as to impart the backup force to the input means.

Abstract: In the housing of a closing cap 2, a valve seat plate 3 is held in place by means of a resilient ring 8 forming at the same time a seal relative to the tank connection to which the closing cap is screwed by its internal thread 1. The valve seat plate 3 supports a sub-pressure valve 4 and an excess-pressure valve 5. Aside from its seal ring 13, the closing member 4 of the sub-pressure valve is made in one piece.The excess-pressure valve 5 comprises a loose valve disc 28 cooperating with a valve seat 27 of the valve seat plate 3. The closing spring 30 is non-rotatably secured to the valve disc 28 and bears by its other open end against a stop 37 so that, by turning the valve disc, the spring pressure is increased or reduced. For this purpose, the valve disc is actuated by a tool introduced through the outlet aperture 21.

Abstract: A system incorporated with an internal combustion engine for recycling engine exhaust fumes back into the engine for a more thorough burning before final discharge; the system including a one way valve unit installed along a line between the muffler and the engine intake manifold.

Abstract: There is disclosed a pressure relief valve having a part which is movable to a first position for returning the closure member thereof to closed position, and thus resetting the valve, automatically in response to a predetermined low pressure level of fluid within the flowway, and to a second position which permits the closure member to move to open position automatically in response to a pressure level of the fluid to be contained which is less than that at which the valve is set to open.

Abstract: Hydraulic double clutch comprising a tractor-driving clutch unit and a power takeoff clutch unit accommodated in a clutch housing serving also as an oil tank. Hydraulic pumps disposed in the housing have gears respectively meshing with a gear on the drive disk assembly of the double clutch to force the working oil into the clutch units through individual oil passages and to push the pistons of the units. Each of the oil passages is provided with a poppet valve at an intermediate portion thereof. The poppet valves are opened or closed to disengage or engage the clutch units independently of each other for interruption or transmission of the torque of engine. Each of the valves is automatically opened when the pressure on the piston builds up to excess and is therefore serviceable also as a pressure control valve. The valve is operable to bring the clutch unit into substantially semi-engaged state.