Abstract: An apparatus for the treatment of gases in a positive crankcase ventilation (PCV) system, in an internal combustion engine, is provided with a housing defining a gas treatment chamber. At least one gas filtering medium is disposed in the treatment chamber, and the gases from the engine crankcase are passed through the gas filtering medium in the treatment chamber, before the gases are routed into the air intake portion of the engine. In addition, the gases, after passage through the gas filtering medium, are passed through an ionization device.

Abstract: A biasing circuit for an ion current measurement system draws power from a primary side of the ignition coil, and applies a positive polarity bias voltage to a low voltage side of a secondary winding of the ignition coil. The biasing circuit includes a silicon-controlled rectifier (SCR) which has an on state for carrying spark current during a spark interval of operation, and further includes an off state which prevents the stored biasing voltage on a capacitor from being shunted to ground, thereby allowing ion current sensing through the low voltage side of the secondary winding. The low on-state voltage drop of the SCR during conduction of spark current minimizes losses of spark energy.

Abstract: An ignition control system for an internal combustion engine includes a control circuit, an ignition coil, a switch, and a sensing circuit. The control circuit is configured to interrupt a primary current, thereby establishing a secondary current which is discharged to cause a spark plug coupled to the secondary winding to produce a first spark. The sensing circuit is configured to generate a secondary current signal representative of a level of secondary current. The control circuit is responsive to the secondary current signal to terminate the discharge by closing the switch to cause the primary current to again flow in preparation of a second spark. The termination of the discharge occurs when the secondary current level reaches a secondary current threshold which is determined as a function of engine speed and ambient temperature.

Abstract: The engine of the present invention has a plurality of cylinders that are divided into a first group and a second group. An air flow meter for detecting an amount of air supplied to the engine is provided downstream of an air cleaner in an intake system. A crank angle sensor for detecting a rotational speed of the engine is provided adjacent to a crank shaft. The amount of air distributed to the first group and the amount of air distributed to the second group are calculated based on the detected amount of air and the detected rotational speed of the engine. The amount of fuel injected into the first group and the amount of fuel injected into the second group are corrected according to the calculated amounts of air distributed to the first and second groups.

Abstract: A service machine mountable on a court for table tennis comprises a service machine body, wherein a micro-controller is used to control a ball-positioning mechanism built in the service machine body and a ball-projecting mechanism coupled with the ball-positioning mechanism. The ball-positioning mechanism further comprises an elevation control motor and a sway control motor, while the ball-projecting mechanism comprises a ball-conveying device and a ball-projecting device. A ball-collecting tray is arranged to collect plural balls, which will be delivered via a conveyer from the service machine body to the ball-projecting device sequentially through the ball-positioning mechanism and a spin. control motor for projection. The micro-controller can be set by a user or provided with a preset program to enable the service machine to shoot spun balls one after another at various angles or directions in continuous or intermittent mode automatically or manually.

Abstract: A ball-throwing machine is provided for throwing baseballs, softballs and the like, which machine includes a power head having three coacting wheels for propelling a ball toward a batter to simulate a variety of pitches at different speeds and different locations. Three AC motors and companion motor drives are provided for causing the wheels to rotate at predetermined speeds. The motor drives include dynamic braking circuits to permit rapid deceleration of the wheels. A pair of linear actuators is provided to permit the power head to be moved to predetermined horizontal and vertical positions. The pitches are established by providing a table of five separate data elements for each of said pitches, three of said data elements corresponding to the rotational speed of each of said wheels, and the remaining two data elements corresponding to the horizontal and vertical angular position of the power head.

Abstract: A pitching system is provided for throwing baseballs, softballs and the like, which machine is synchronized to work in conjunction with a video display means to permit a batter to visually view a pitcher prior to and during delivery of the pitch. The machine includes a power head having at least two and preferably three coacting wheels for propelling a ball toward a batter to simulate a pitch. Three AC motors and companion motor drives are provided for causing the wheels to rotate at predetermined speeds. The motor drives include dynamic braking circuits to permit rapid deceleration of the wheels. A pair of linear actuators is provided to permit the power head to be moved to predetermined horizontal and vertical positions. A programmable controller is included for individually controlling the rotational speed of each individual wheel, the horizontal position of the power head and the vertical position of the power head.

Abstract: A bow stabilizer having a hollow body with at least one opening and forming a chamber. A plug is removeably mounted within each opening. At least a portion of the plug is positioned between two contact surfaces of a sealing device. The sealing device further has a threaded member rotatably mounted with respect to the plug and mateably engageable with an internally threaded bore formed by a first plate of the sealing device. As the threaded member is rotated, the two plates of the sealing device move towards each other which compresses and deforms at least a portion of the plug. An outer surface of a portion of the plug is enlarged and compressed against an inner surface of the hollow body to form a tight seal that contains a fill within the chamber.

Abstract: A chain saw for aggregate material has a nozzle that provides a spray of water to that portion of the saw chain that is traveling between the guide bar and the drive sprocket. The flooding provided by the nozzle washes slurry off of the saw chain. A basin with inclined baffles is provided to collect the slurry carried by the saw chain into the housing. Apertures are provided in the basin for discharging the collected slurry.

Abstract: Cooking apparatus comprises an elongated post supportable in an upright position in proximity to a cooking fire, a collar slidably mounted directly on the post for sliding movement along the post; a cooking platform secured to the collar, a tether, and a hook or link engaging mechanism carried at the upper end of the post. At least a portion of the tether is a link chain. The hook or link engaging mechanism serves to releasably secure the collar together with the platform at a selected position of elevation on the post. In order to control the cooking process, the apparatus may be structured not only to control the elevation of the cooking platform over the cooking fire but also to control the horizontal angular position of the cooking platform in relation to the cooking fire.

Abstract: A portable controlled heating unit providing for recirculating heated air to obtain better control of exit temperature from a heating unit. Temperature sensors of exit temperature control vaned entrances and exits under one single unit to control the recirculation.

Abstract: A filter for covering a surgical orifice at a base of the neck of a tracheotomized person and connecting the trachea to the ambient atmosphere. The filter comprises a bib having a cutout neck with a border extended by one or more attachment strips adapted to form with the border a closed loop around the neck of the person by complementary joining elements which may not be separated after being joined, so that the filter cannot be re-used.

Abstract: The present invention provides for a filter assembly (124) which includes a filter element (128) and a memory device (402). The memory device (402) allows for a record of the filter element's usage to be available at all times even if the filter assembly (124) is moved from one filtering system to another one. In another embodiment of the invention, the filter assembly (124) interacts with a filtering device such as air unit (130) which periodically updates the memory device (402) while the air unit (130) is operational. The air unit (130) also periodically checks to see if the filter assembly (124) has reached the end of its useful life. If so, the air unit provides an audible and/or visual alarm.

Abstract: A device for dispensing a unit dose of substance comprises a nozzle assembly (2) including a container (24) housing a unit dose of the substance, and an outer body (4) to which the nozzle assembly (2) is releasably attached. The body (4) includes a system actuable to effect discharge of the substance from the nozzle assembly (2) and actuating means operably by a user to effect discharge. Preferably the discharge system comprises a spring-loaded air piston (68) actuable to inject air into the container (24) to cause discharge of the substance. In one embodiment a driving spring for the air piston is loaded with spring energy by the action of installing the nozzle assembly on the body, the driving spring thereafter being held in a cocked state until operating of the actuating means by the user to effect release of the spring energy to cause discharge.

Abstract: Methods and systems for supplying respiratory oxygen to patients when the patients are inhaling are disclosed. The methods and systems may rely on delivery devices that are selectively placed in fluid communication with either a respiration sensor or a source of oxygen. The methods and systems may actively monitor for exhalations, as well as monitor for oxygen in the oxygen source. The respiration sensor may preferably be a flow sensor.

Abstract: An apparatus for supplying air and at least one additional gas to a respirating subject has a container with an open end for receiving air, which is connected to a tubing system for conveying gas to the subject. The additional gas is supplied from an additional gas source via a metering system and a supply line to the container. As gas is supplied to the subject during inspiration phases by a compressor, air will flow into the container via the open end. At the same time a flow of additional gas is supplied to the container via a point of entry. During expiration phases gas will be diverted via a flow divider to flow back to the container via the supply line for the additional gas. A homogeneous and controllable concentration of additional gas is obtained within the container before each inspiration phase. The apparatus requires only a few components, making it a low cost apparatus, but it provides a good control of the concentration of additional gas supplied to the patient.

Abstract: A system for simply and effectively introducing transponders into human or animal recipients is disclosed. A transponder, such as a microchip, is coated with a degradable coating and shaped so that is may be pushed through the recipient's skin. An insertion tool is used as indicated by the type of recipient. The tool receives the transponder, protects the transponder while it is pushed into the skin, and releases the transponder when rotated.

Abstract: Methods and systems for monitoring, diagnosing and/or treating psychological conditions and/or disorders in patients with the aid of computer-based virtual reality simulations. Pursuant to one preferred embodiment, a computer program product is used to control a computer. The program product includes a computer-readable medium, and a controlling mechanism that directs the computer to generate an output signal for controlling a video display device. The video display device is equipped to display representations of three-dimensional images, and the output signal represents a virtual reality simulation directed to diagnosis and/or treatment of a psychological condition and/or disorder.

Abstract: An in situ treatment of an organ, such as a kidney, of a living body, having a disease or tumor. The method includes: subjecting a diseased or tumorous organ, such as a kidney, to an effective amount of a therapeutic agent, by infusing the agent via blood entering the organ, creating an isolated section in a major vein spanning the area where the tributary veins connect with the major vein, the major vein and tributary veins being directly associated with the organ; passing contaminated effluent blood from the tributary veins of the organ to the isolated section and capturing the effluent blood therein; and, evacuating the captured blood from the isolated section without exposing the contaminated effluent blood to other organs or tissues of the body and without interrupting the general circulation in the system of the body.

Abstract: The apparatus and method of the current invention relate to electrosurgical work involving the forming of cuts in and coagulation of body tissue of a patient. The apparatus and method of the invention overcome disadvantages common with conventional dipolar and monopolar apparatus. In one aspect the invention provides a cutting tool or instrument with at least one cutting or coagulation tip and the tool is adapted to operate as both a power supply electrode to supply power to the tip and as a return electrode to allow impedance feedback signals to be received by a control means thereby eliminating the need for a separate second electrode and taking the patient out of the circuit received by a control means According to a second aspect the feedback information is stored, processed and analyzed in relation to pregrogrammed and previous actual feedback to allow alteration to the power supply to the tip to create optimum cutting and/or coagulating conditions.

Abstract: Posterior capsular opacification can be prevented by modulating focal contacts, which mediate adhesion between lens epithelial cells and the lens capsule, using a treating solution containing a focal contact-modulating substance or a proenzyme, such as Lys-plasminogen, which is introduced into the lens capsular bag during cataract surgery. To secure the passage of a treating solution between the lens epithelial cells, a calcium chelating agent, such as ethylenediamine tetraacetic acid CEDTA), is included in a treating solution. To limit the effect of the treating solution to lens epithelial cells prior to, during, and/or after capsulotomy, an inhibitor, such as &ohgr;-amino acid, can be introduced into the anterior chamber before the treating solution as a mixture with a viscoelastic material, such as sodium hyaluronate, or into the lens capsular bag without a viscoelastic material during capsulotomy.

Abstract: The present invention pertains to a circulatory system, such as a circulatory assist system for a patient. The system comprises a blood pump having tubing fluidically communicating with a person's blood vessel. The blood pump can be, for instance, a centrifugal blood pump but is not limited thereto. The system also comprises an occluder device for controlling flow of the blood pump. The occluder device is in contact with the tubing of the blood pump. The occluder device can be incorporated into an anti-kink sheath over the outlet graft tubing of the blood pump. Preferably, the system comprises control means for actuating the occluder device when the blood pump malfunctions. In this manner, potentially fatal retrograde blood due to pump failure is automatically prevented. In a preferred embodiment, the occluder device comprises a cylindrical tube and a bladder mechanism connected to the inside surface of the tube. Type bladder mechanism preferably comprises a bladder and means for inflating the bladder.

Abstract: A hair roller cloth and a hair roller includes a hair roller made of heat-resistant material and having mainly a circular cross-section of the same diameter all along its length or of different diameter regularly changing all along its length so as to set various curlings and waves, and a hair roller cloth directly wound around the hair roller and having ceramics powder coated on an outer surface to be heated up by a heating member provided flatly in the cloth and to produce special function for hot setting hairs.

Abstract: Apparatus for grooming and decorating hair includes a hair clip and a grooming device pivotally connected to the hair clip. The grooming device can be moved between a position between the jaws of the hair clip and a position exterior of the hair clip and projecting outwardly from the jaws.

Abstract: The invention relates to a makeup box or the like comprising a body housing a supply of substance, a lid, and a sealing member having a deformable lip extending around the supply of substance when the box is closed, one of the lid and the body of the box bearing against said sealing member when the box is closed. The sealing member is secured to a support piece fitted on the other one of the body of the box and the lid, and extending at least in part beneath said deformable sealing lip.

Abstract: Providing a dry cleaning method capable of removing deposition films which adhere to the inner walls of a semiconductor manufacturing apparatus-that is, removing dust production sources therefrom. To this end, the dry cleaning process is supplemented by a step of removing either ion sputtered matter or products of the internal member materials of the apparatus or chemical compounds of such apparatus internal member materials and of an etching gas, in addition to a step of removing etching reaction products. It thus becomes possible to eliminate dust generation due to pealing off of deposition films with an increase in the number of wafers being processed, which in turn increases the manufacturing yield and working efficiency of the manufacturing apparatus.

Abstract: A method for detecting completion of reaction chamber cleaning, comprising monitoring the pressure within the reaction chamber, calculating and tracking voltage versus time gradient of the pressure within the reaction chamber, recognizing when positive and negative gradients of pressure change have occurred and, based on this recognition, terminating the cleaning process of the reaction chamber.

Abstract: Color is used to divide a towel (8) into sections. A larger section (10) lay adjacent to a smaller section (12). The larger section (10) is designated to remove perspiration from the user's face/body while the smaller section (12) is designated for the user to remove perspiration from fitness machines. Furthermore, an arrangement to retain small, personal belongings may be provided by either a retaining device (14), or a storage pocket (22).

Abstract: In the case of a cleaning device (1) a washer jet (9) is arranged on a piston rod (6) which can be moved by means of an electromotive drive unit (3). A heating element (10), which is connected to a hollow cylinder (2) which is in a fixed location, is situated, in its illustrated position of rest, in the direct vicinity of the washer jet (9) and in this manner makes it possible for the washer jet (9) to be heated thereby preventing it from freezing up when ambient temperatures are critical. No electrical contacts are required on the moveable part of the cleaning device (1) because of the connection of the heating element (10) in a fixed location.

Abstract: A windproof umbrella includes: a central shaft, a rib assembly having at least a top rib and a stretcher rib pivotally secured to the central shaft for securing an umbrella cloth thereon, a pulling rod secured on the stretcher rib and a pulling rope connected between the pulling rod and the top rib (or an outer rib portion of the rib assembly), with the pulling rope and pulling rod fastening the top rib (or the outer rib portion of the rib assembly) towards the central shaft for preventing inversion of the umbrella cloth and the rib assembly when opening the umbrella, whereby upon folding of the umbrella, the pulling rod and pulling rope will be tensely folded within the rib assembly without loosening for forming a compact folded umbrella.

Abstract: A shelter for the condenser of an air conditioning system. The shelter comprises four lateral wall panels and a covering panel which are joined together to form a parallelepiped covering the condenser on all sides except the bottom where the condenser rests on the ground. The panels have rigid peripheral structural frame channels and mesh material supported on the frame channels. The mesh material passes air and obstructs leaves and similar debris which would otherwise clog the condenser. The shelter is assembled by threaded fasteners which are threaded into holes formed in the frame channels of the various panels. One lateral panel has a relief opening enabling the assembled shelter to be lowered over the condenser without causing interference with refrigerant conduits and power and control cables.

Abstract: A pressure responsive valve assembly is disclosed as having a frangible burst disk that largely controls actuation of the valve. The valve assembly includes a housing having an inlet and an outlet and a valve seat therein. An actuating unit includes a collapsible fluid chamber and a moveable pressure responsive valve member. The valve member is engageable with the valve seat, positioned to experience the pressure conditions at the inlet, and operably coupled with the mechanism to cause collapsing of the fluid chamber when the valve member moves relative to the valve seat to establish or close communication between the inlet and outlet. The rupture disk normally blocks fluid flow from the chamber and thereby prevents collapsing of the chamber and corresponding movement of the valve member until the valve member experiences a predetermined maximum pressure at the inlet.

Abstract: A device for drawing off gaseous and liquid media from an inflowing medium, in particular in a tank ventilation system, has the following features: a housing, a feed connection for introducing the inflowing medium into the housing, an outlet connection for drawing off the liquid medium at the lower side of the housing, an outlet connection for drawing off the gaseous medium at the upper side of the housing, a float chamber which is arranged between the outlet connections, a floating body which is arranged in the float chamber in a manner which allows it to be displaced in the longitudinal direction of the float chamber, a closing device for closing the float chamber with respect to the outlet connection for the liquid medium, a closing device for closing the float chamber with respect to the outlet connection for the gaseous medium, and a deflecting device for deflecting a longitudinal movement of the floating body within the float chamber into an opposite direction and for transmitting the said longitudinal

Abstract: For the purpose of obtaining a manifold for a change-over valve capable of corresponding with given situations easily and reliably even when some of piping directions of the change-over valves are different or piping directions are altered during an operation, port surfaces 21, 22 are respectively formed on a front end surface and a bottom surface of a manifold 1, output openings 23a, 23b commonly in communication with output passages 14a, 14b are respectively formed on the port surfaces 21, 22, and a port block 26 having output ports A, B in communication with the output openings 23a, 23b and a closing plate 27 for closing the output openings 23a, 23b are allowed to be selectively mounted.

Abstract: A water shut-off system incorporates a water shut-off valve utilizing a pair of adjacently disposed electrodes, a transmitter and a receiving means. The water shut-off valve is in the form of a ball valve. A timing logic causes current to flow to a valve driving motor as electric pulses.

Abstract: The invention is directed to a double seat valve with means for preventing leakage. A shared drive unit is provided for the actuation of the two valve disks (6, 7). This drive unit contains a cylinder (17) with a first work piston (18) which is loaded at both sides by pressure springs (29, 22) and is fixedly connected with the valve stem or valve shaft (13) of the lower valve disk (7), this valve disk (13) penetrating the upper valve disk (6) and its tubular shaft (14) in a telescoping manner, the shaft, in turn, projecting into the cylinder (17) by its upper end and having an abutment (28) at that location for the lower pressure spring (29) which presses the upper valve disk (6) into its seat (8), and a second work piston (36) which acts on the tubular shaft and is movable on the tubular shaft is arranged under the first work piston (18) in the cylinder (17), and a third work piston (30) which acts on the lower valve disk is arranged above the first work piston.

Abstract: A rotary valve includes a housing having a housing bore which can be laterally closed by bearing covers. Inside the housing, a cellular wheel is rotatably supported. A guiding device extends in an axial direction of the cellular wheel and serves for drawing the cellular wheel in the direction of its axis of rotation out of the housing bore. This guiding device includes an additional bearing which can be displaceable in the axial direction relative to that bearing cover which is on the guiding side. The additional bearing serves to support the cellular wheel temporarily during removal from the housing bore. This additional bearing can be connected to that end of a cellular wheel shaft which is situated at the side of the guiding device.

Abstract: The invention relates to a hot water delivery device (20), for application to trucks, tractor-trailer vehicles and the like, including a water tank (1) which can be housed in a casing (10) rigid with the platform of the vehicle The main feature of the invention is that the device further comprises an electric power supplied boiler (6), having a size adapted to allow the boiler to be housed in said casing.

Abstract: This invention generally relates to rescue, firefighting, or paying devices and, more particularly, to a fire hose dispensing device and method. The present invention includes a hose box, fire hose, and a hose box release mechanism. The device and method allow firefighters to release and pay hose without leaving the passenger compartment of a fire truck.

Abstract: An emergency shutdown system for a process control system includes an emergency shutdown (ESD) valve and an associated valve actuator. An emergency shutdown (ESD) controller provides output signals to the ESD valve in the event of a failure in the process control system. A solenoid valve responds to the ESD controller to vent the actuator to a fail state. A digital valve controller (DVC) test strokes the ESD valve. An impedance booster device enables the dc powering of the solenoid valve and the DVC over a two wire line while still permitting digital communication over the same two wire line.

Abstract: A regulator for regulating outlet pressure of a fluid contained in a tank includes first and second pistons. The first piston is biased in a first direction and is movable against the bias when exposed to pressure in the tank. The second piston is biased in a second direction away from an end of the first piston, and the second piston is movable against the bias when exposed to the outlet pressure. The ends of the first and second pistons are separated by a first distance to allow the fluid to flow out of the tank, and the ends of the first and second pistons are positioned closer together than the first distance to inhibit flow out of the tank when the outlet pressure reaches a threshold.

Abstract: A valve and valve arrangement for a fire suppression system includes a valve having an inlet and an outlet provided on opposite ends of the valve housing with a pressure relief valve in communication with the interior of the housing. A gap in a seat for the valve member provides communication with the inlet of the valve. In another embodiment, a valve has a disk provided in a passageway through the valve member to restrict the flow through the valve to a predetermined rate which is less than the fully opened flow rate through the valve.

Abstract: An ozone-water feeding facility is able to feed ozone-water at a highly-accurately controlled concentration from an ozone-water producing apparatus to a remote service location even under an intermittent usage condition. The facility includes an ozone-water producing apparatus disposed remote from an ozone-water service location; a circulating pipeline extending outwardly from the ozone-water producing apparatus and returning thereto by way of a neighborhood of the service location; and a short branch pipe branched from the circulating pipeline at the above neighborhood. The ozone-water is intermittently introduced from the branch pipe, to thereby supply the ozone-water at a specific concentration to the service location. The facility may preferably include a discharge side ozone-water conditioning portion for diluting the ozone-water intermittently introduced from the short branch pipe into a specific concentration before the supply of the ozone-water to the service location.

Abstract: In a pneumatically driven liquid supply apparatus comprising a circulation pump 26 or constant-volume pump 34 for supplying a washing liquid or chemical to a washing tank 20 for semiconductor wafers used during the fabrication of semiconductor devices; an electromagnetic switching valve 51 and a pressure regulator 52 that configure an air-pressure adjustment means 50 are connected to an air source 60; and air supply pipelines 41a, 41b, 41d, and 41e are each connected to the air-pressure adjustment means 50, the circulation pump 26 and the constant-volume pump 34. A leakage sensor 70 is interposed within each of the air supply pipelines 41a, 41b, 41d, and 41e between the air-pressure adjustment means 50 and the circulation pump 26 or constant-volume pump 34, so that any liquid that flows backward through the circulation pump 26 or the constant-volume pump 34 and into the air supply pipeline 41a, 41b, 41d, or 41e is detected by the leakage sensor 70.

Abstract: A directional control valve system is provided in conjunction with a hydraulic actuator, using a meter-in flow control valve that is simple in structure to permit pressure fluid to be fed into a first and a second chamber of the hydraulic actuator. The directional control valve system includes a meter-in flow control valve 1 for establishing and blocking fluid communication of a pump port with an outlet port 12, a first and a second load checking valve 2 and 3 that is in fluid communication with the outlet port 12, and a meter-out flow control valve 4 for establishing fluid communication of one of a first and a second actuator port 72 and 74 at an output side of the first and second load checking valves 2 and 3 with a tank port 71, and has an arrangement that permits the first and second load checking valves 2 and 3 to be held in a closed state with pressure fluid.

Abstract: The invention concerns a hydraulic steering arrangement (1) with an adjustable throttle, which has an internal rotary slide (2) with internal steering openings (4) in its circumferential wall and rotatable in relation to this, an external rotary slide (3) with external steering openings (7, 10) in its circumferential wall (8). The production of such steering arrangements must be inexpensive, yet a jamming during operation must be avoided. For this purpose, each of the external steering openings is made by a substantially radially extending bore (7), which penetrates part of the circumferential wall (8), and a following section (10) with reduced flow cross section.

Abstract: Multi-port valve assemblies with, typically, two-piece housings are disclosed. Particularly useful in connection with swimming pools and associated water pumps, the assemblies avoid reliance on an elongated handle to effect rotation of the internal structure of the valve. Instead, the assemblies utilize a knob—which users need not lift—coupled to a post in which an elongated slot is formed. Doing so avoids breakage problems associated with use of elongated handles while reducing wear of internal seals. Each valve assembly additionally may include a cam having non-semicircular, asymmetrically-shaped recesses into which followers attached to a shaft passing through the elongated slot are received.

Abstract: A rocker valve with pneumatic pre-control includes a housing (G) with the pressure means connections (P, A, R, Ps), at least one rocker in the housing which is movable between two final positions about an axis and works together with at least one sealing surface for at least two pressure means connections, where one handle of the rocker can be impacted with a pre-control pressure via a pre-control connection and the rocker in one final position connects one working connection (A) with the supply connection (P) and in the other final position with the ventilation connection (R).

Abstract: A method and system for controlling the flow of a gaseous medium through a fluid are described. The method includes providing a rheologic fluid through which a gaseous medium can be conducted, and controlling the viscosity of the rheologic fluid to control the flow of the gaseous medium. The system has a rheologic fluid, which is located in particular in a device to be controlled, a guide guiding the gaseous medium through the fluid, and a field applier for applying a field at least partially in the area of the rheologic fluid.

Abstract: A gas delivery system comprises a common mounting block that supports the components in a predetermined arrangement and defines passageways between components so that a gas can flow through the passageways and components along a predetermined flow path. The mounting block is formed so that at least a portion of at least one mechanical part of at least one component is provided in the block, the passageways connect the components together and the remaining portion of each component not formed in the block is removably attached to the block. The electrical circuitry that is used to operate the components is separately provided remote from the components so that replacement of a component replaces those mechanical parts of the components not provided in the block, without requiring the replacement of the electrical components.