Abstract: In an automatic sewing machine for sewing bands onto fabric parts, a metering device (3) which meters the band is electronically coupled to the sewing machine via a position sensor (6) in the form of a pulse generator, a signal processing circuit (8) and a motor, for example a stepping motor (SM). The amount of band per unit time delivered by the metering device depends on the speed. On the other hand, the stitch length of the sewing machine is, however, not independent of the speed but becomes greater with increasing speed. The resulting, undesired tensions between the fabric part on the one hand and the band on the other hand are avoided by a correction means (10) between the pulse generator (6) and the sewing machine (2) and the driver circuit (12) of the stepping motor (SM) of the metering device (3). The correction device ensures that control signals reaching the driver circuit (12) result in corrected, excessive metering of the band at higher sewing machine speeds.

Abstract: An automatic sewing device for the sewing of workpieces of different size, such as collars, cuffs or the like, the workpieces having a seam section extending in a straight line where they differ in size, has a workpiece holding plate to press the workpiece on a bearing plate and to displace it on the bearing plate. The workpiece holding plate has two seam forming sections of maximum possible size and is made in one piece. Further devices are provided for shifting the workpiece holding plate after a 1st seam contour section has been sewn to move said workpiece holding plate with respect to said 1st seam contour section to a position of the workpiece holding plate where a second seam forming section corresponds to a second seam contour section.

Abstract: A sailboat apparatus includes a hull having a bottom, bow and stern portions along with a central portion and at least one mast for supporting a sail extending above the hull. The mast is mounted to the hull for side-to-side movement relative to the hull. A keel assembly has a keel extending below the hull bottom and through the hull bottom and attached to an elongated transfer shaft rotatably mounted to the hull and having the mast coupled to one portion thereof. The keel is coupled to another portion of the transfer shaft and extends from the transfer shaft through the hull bottom into the water so that movement of the mast from side-to-side rotates the transfer shaft and the keel in the opposite direction from the mast to stabilize the sailboat.

Abstract: To reduce the total ship resistance and to improve a propeller efficiency and cavitation performance due to the reduced thrust loading on the propeller for ships or vessels having a sonar dome or an equivalently shaped designs located below the baseline of the hull, a teardrop-shaped bulbous bow is attached to the ship stem bow between the forward perpendicular of the bow and 12.7 ft forward of the forward perpendicular of the vessel, inclusive, and between the ship design waterline and the baseline. The bulbous bow is separate and discrete, and spaced from the sonar dome and has a shaped of a teardrop. The teardrop shaped bulbous bow is mounted to the ship stem bow with the round end portion pointing in the forward direction and the pointed end portion pointing in the aft direction.

Abstract: A hoist block is fixed on an inside edge of the sail and to articulated slide in order to enable a rotation in the axis of a sail boat mast groove. A drop block is on the outside edge of the sail. An associated tube or slat extends between the hoist and drop blocks in order to stiffen the sail profile. The block 2 or 9 is rigidly fixed on an articulated slider to hoist or lower the sail mechanism.

Abstract: A sail tensioning device comprises a handle 70, an arm 73 and a tube 75 which fit together to form the device. The handle is fixed by a strip of webbing which fits in an opening 77 and is stitched to a sail to provide an anchor for the handle. The arm 73 fits in a cavity in the handle 70 to pivot about an intermediate point of the handle and urge the tube 76 against a batten (not shown), as the handle swivels about the anchor. Urging the batten in this way forces the batten against a remote end of a batten pocket to tension the sail.

Abstract: An accessory effective to pierce the seal closing the mouth of a bottle when the bottle, filled with a pourable material, is applied in inverted position to a well of a dispenser, with a shoulder of the bottle engaging a rim of the well to support the bottle in inverted position in the well. The accessory is placed in the well of a dispenser and includes a collar placeable against the rim of the well before the bottle is inserted in inverted position into the well. A piercing member is carried by the collar for piercing the bottle seal when the bottle is placed in inverted position into the collar.

Abstract: A device for achieving visual marking of a line by a marking body is described. It relates especially to a substantially horizontal ground wire in a transfer system for high voltage electricity, at a relatively high altitude above the ground.The device comprises:a shell, especially in the form of a sphere, divided into two semispheres, carried bya fastening device, comprising clamping elements, provided to encompass the line in a first position, and to grasp the line fastening, in a second position, anda carrying device, in turn carried by a lifting device such as a helicopter or crane, which carrying means in said first position of the clamping elements carries the fastening device, and is arranged to be released, in said second position of the clamping elements, from the fastening device, so that said shell, in the form of a marking body, remains attached to said line, free from the carrying device.

Abstract: In a subsea fluid extraction system, the wellhead equipment comprises an X-mas tree on a guide base, the tree having a borethrough which can be run and retrieved a pump unit including an electric motor driving an impeller, the pump unit being suspended from a pump hanger in the X-mas tree by an elongate electrical conductor assembly consisting of concentric tubular conductors with insulating sleeves therebetween. An outer tube spaced around the conductors provides a fluid passage communicating through the pump unit with a second passage within the conductors for circulation of barrier fluid. Electrical supply to the pump unit is effected by a female connector located at the side of the X-mas tree which mates with an upright connector element on a transformer on the guide base.

Abstract: Stackable rectangular containers, such as those for receiving pets, the top and bottom half of each container having spaced ledges adjacent the corners of the container for receiving extensions of the bases of rollers, when needed. When the rollers are removed, the containers become securely stacked by having upstanding rectangular portions which interfit with those of a stacked container at the four corners.

Abstract: This invention is a method of reducing the incidence of bovine mastitis by mounting an extended release insecticide dispenser on the ventral surface of the bovine's tail just cranial to the switch. This allows the insecticide vapors to permeate the area between the rear legs and the udder and its associated teats. This greatly reduces the incidence of biting insects which transmit mastitis causing bacteria to the teats. Also, tabs are provided on the extended release insecticide dispenser to hold the same in place on the tail until the adhering medium is cured. These tabs are preferably made from a moisture degenerative type material such as paper.

Abstract: The present invention discloses a means for limiting the pressure within the induction system of an internal combustion engine having a flexible elastomeric sealing wall disposed between components of the intake. When internal pressures reach a predetermined limit, the wall is subject to elastic deformation to thereby vent the pressure increase within the induction system to the exterior thereof. Rates of pressure rise and peak pressures are thereby lowered. Return of normal system pressure levels operate to reseat the sealing wall enabling continuation of engine operation.

Abstract: In a control system for a valve actuation property variable control device which can switch over between a plurality of modes including a low speed mode for adapting at least one of an intake valve and an exhaust valve of an engine to a low speed range and a high speed mode for adapting the valve to a high speed range at least according to the rotational speed of the engine and a representative temperature of the engine, to prevent an abrupt change in the engine output by switching over valve actuating properties while the engine is being warmed up, the load condition of the engine is detected so that the transition from the low speed mode to the high speed mode may be prohibited if the representative temperature of the engine exceeds a prescribed level while a load higher than a prescribed level is being detected. Thereby, the driveability of the engine is improved.

Abstract: A direct acting hydraulic tappet and a method for making same in which an oil groove and interior structure defining a weld interface are formed in a cup-shaped body by a rolling process, the body is heat treated, a web and hub structure is positioned against the weld interface and the resulting assembly is subjected to a localized, capacitive discharge welding process in the weld interface area. In accordance with the invention, the weld interface is formed to a specific shape to enhance the integrity of the weld. In accordance with a further aspect of the invention, a baffle member can be assembled to the web and hub structure prior to its positioning within the body member.

Abstract: In a process for controlling the speed of an internal combustion engine after starting, the ignition angle (ZW) is adjusted in the retarded direction when an engine speed threshold (nS) is reached, in order to reduce the power and to reach the idling speed (nLL) without overshooting. The engine speed threshold (nS) is dependent on the temperature-dependent idling speed (nLL). The degree of ignition angle adjustment (Z) is dependent on the rate of variation of the engine speed.

Abstract: A method and apparatus for injecting fuel into a combustion chamber of an air compressing, spontaneous ignition, internal combustion engine are provided. An adjustment member of an injector is actuated electrically and is controlled via an electronic circuitry, with the fuel quantity being withdrawn from a pressure chamber. The adjustment member acts upon a release sectional area of a restrictor. An adjustment member in the form of a magneto strictive rod is provided. The release sectional area is controlled by a control voltage, generated by the electronic circuitry, and can be chronologically modulated.

Abstract: A known fuel injection apparatus, in which fuel and foreign matter outside the fuel injection valve can not flow past the injection valves because a flow opening is disposed between fuel supply conduit and fuel outlet conduit and of which degassing of the fuel takes place before it enters the injection valve, any foreign matter entrained in the fuel will not give rise to malfunctions in a pressure regulation. The penetration of foreign matter into the pressure regulator is prevented by means of an appropriate choice of the dimensions of the flow opening, which is provided between a filter element of the fuel injection valve and the wall of a receiving bore. The fuel injection apparatus is employed in fuel injection systems for mixture compressing internal combustion engines with externally supplied ignition.

Abstract: A constant-pressure operating valve is provided to allow communication between a canister passage connected to a canister and a fuel tank passage connected to a fuel tank and to selectively terminate the communication between them. The constant-pressure operating valve is opened when the internal pressure of the fuel tank exceeds a predetermined value, thereby allowing the fuel vapor in the fuel tank to flow into the canister. Further, when the engine is in operation, the constant-pressure operating valve can be opened, for example, through the action of solenoid, irrespective of the internal pressure of the fuel tank. If the constant-pressure operating valve is opened when the internal pressure of the fuel tank is less than the predetermined value, then the fuel vapor in the fuel tank is drawn into the canister, and so even if the lid of the fuel tank is opened in this condition, the amount of the vapor escaping into the atmosphere is limited.

Abstract: The present invention relates to an improved fluid vaporization means for use in conjunction with an internal combustion engine comprising intake and exhaust valves, each of the valves including seats. An exhaust valve seat means is provided for receiving and directing unheated fuel around the exhaust valve seat whereby the fuel is preheated by the cylinder means. An intake valve seat receives the heated fuel from the exhaust valve seat and includes means for directing the now heated fuel from the intake valve seat and into the cylinder for increased combustion efficiency.

Abstract: An arrow holding and loading device for an archery bow has a frame to be bolted to the bow so that it can support a carriage that moves horizontally from left to right at the arrow plate side of the riser, through a window in the arrow plate side of the riser, or to the rear of the riser to automatically shift a follow-up arrow into shooting position upon release by the archer of an initial arrow.

Abstract: A compressed gas powered gun is disclosed having a semi-automatic firing mechanism for enabling successive firing sequences. The firing mechanism includes a sear having a latch arm, with a cam at one end and an interlocking element at the other end. The cam is positioned to close a firing chamber as the latch arm is rotated. The interlocking element is positioned to concomitantly release an actuating bolt as the latch arm is rotated. A recoil spring repositions the actuating bolt for engagement with the interlocking element upon discharge of the firing chamber.

Abstract: An archery bow, such as a compound bow, is provided with pivoting pocket members for attaching each limb to the bow handle. Each pocket has a recess for receiving the fixed end of a limb and is attached to the handle by an adjustment bolt through the limb and the pocket. A pair of pocket walls extend away from the recess to straddle the end of the handle. The pocket pivots about a pin passing through the end of the handle and through bores in the walls of the pocket.

Abstract: An apparatus for conserving oxygen delivered to a patient including a flat annular housing with an interior chamber having an outlet and inlet port, with the outlet port affixed to a flow check valve. The interior chamber is divided by a flexible diaphragm with the diaphragm and one wall of the housing defining an oxygen storage reservoir which communicates with the outlet and inlet ports. The inlet port directs oxygen from an oxygen tank into the reservoir, and the outlet port directs oxygen through the check valve to the patient. During inhalation, the patient inhales oxygen from the storage chamber through the check valve, thus collapsing the diaphragm. During exhalation the check valve closes, preventing introduction of potentially infectious exhaled air into the system and allowing oxygen to accumulate within the oxygen storage chamber instead of being wasted and expelled during exhalation.

Abstract: There is disclosed a guide device for guiding an endoscope. The guide device includes an elongate, tubular guide body so flexible as to be bent. An insertion portion of the endoscope is adapted to be inserted into and guided by the guide body. A direction indication mechanism is mounted on an inner periphery of a front end portion of the guide body. The direction indication mechanism includes an annular holder member, and a displacement member supported by the annular holder member for displacement circumferentially of the holder member under the influence of gravity. The endoscope itself is not provided with a direction indication mechanism, and by observing the displacement member from the inner side of the front end portion of the guide body, the direction is confirmed.

Abstract: A laparoscopic retractor device comprising an elongate rigid frame member insertable through a laparoscopic trocar sleeve into a patient's body, a rigid retractor member pivotably attached to a distal end of the frame member, and one or more components on the retractor member for enabling modification of an effective length or width of the retractor member. A variable length retractor member may have modular extension elements or a telescoping insert.

Abstract: A continuous passive motion device for achieving full extension of the leg of a patient includes a base and a four-bar articulated limb support member which is mounted for movement on the base. For the articulated limb support member one bar is a femoral support member which is pivotally mounted on the base. Another one of the bars is a tibial support member which is pivotally joined to the femoral support member. Also included in the device is a drive bar which has a first end reciprocally mounted on the base of the device and a second end which is pivotally attached to the femoral support member. A cross bar having a first end pivotally attached to the tibial support member and having a second end pivotally attached to the drive bar interconnects the tibial support member and the drive bar. The device further includes a motor which is connected to the device for reciprocating the first end of the drive bar to alter the configuration of the device for exercising the leg.

Abstract: An inhaling device for treating the lungs and respiratory tracts of humans or animals has a pressurized gas source, an atomizer connected to the gas source in a pressure conveying manner, a mouthpiece connected to the atomizer, and a spent gas flue. A valve for periodically interrupting the flow of exhaled air is provided in the region of the spent gas flue. The valve is activated by a control unit.

Abstract: A diving snorkel having a ventilating portion comprising an assembly of a first pipe portion and a second pipe portion extending in parallel to and communicating with each other, and a main pipe of which the upper end is connected to the first pipe portion, wherein the second pipe portion is provided at its upper end with an air inlet and at its lower end provided with means to prevent the undesirable flow of water into the main pipe 2 through the air inlet as a diver is in the water.

Abstract: A fiberoptic based sensor for patient care use. The sensor includes a catheter placed transcutaneously into a blood vessel which is connected to an external measuring head. A sensing tip of the catheter includes a pressure sensing element and an oxygen saturation measuring element. Features of the invention include novel tip designs, measuring head features, and approaches for enhancing measurement though correlation of the saturation and pressure readings.

Abstract: An improved technique for establishing the position, dimensions and orientation of a vessel which is essentially free of internal acoustic discontinuities involves scanning the vessel with a beam of ultrasonic energy and, from the ultrasonic echoes received in the A-mode lines of sight of the ultrasonic beam, establishing a B-mode image of the vessel. An angle marker, in the form of a short line segment, is established, using the B-mode image, on or near a straight axis of the vessel. The length of the angle marker is divided into a number of sub-sectors, each of which receives approximately the same number of A-mode lines of sight of the ultrasonic beam. An average A-mode signal is obtained for each sub-sector. Comparison of the average A-mode signals provides information about the orientation of the angle marker relative to the axis of the vessel.

Abstract: The present invention relates to systems and methods employed in the use of spectroscopy in the diagnosis of tissue. More particularly, it relates to the use of surface contact and needle probe devices having one or more optical fibers used to direct laser radiation onto tissue to be diagnosed, collecting radiation subsequently emitted by the tissue and delivering that radiation to a system for spectral analysis.

Abstract: An apparatus for vertically aligning a given point on a pressure transducer unit with a desired point an a patient, the apparatus comprising: (a) a light source; (b) a housing adapted to contain the light source; (c) at least one leveling tube having a leveling axis that is substantially parallel to the light beam, the leveling tube comprising (i) a closed transparent envelope containing a liquid and a bubble of gas, and (ii) lines formed on the envelope, where the leveling axis is substantially horizontally aligned when the bubble of gas is located between the two lines; (d) an indicating mark formed on the housing means, where the beam of light is vertically aligned with the given point on the transducer unit when the indicating means is vertically aligned with the given point on the transducer unit; and (e) a locking system for selectively locking the housing means to prevent movement thereof relative to the transducer unit when the beam of light is both horizontally aligned and vertically aligned with the

Abstract: An automatic blood pressure monitor having a blood pressure cuff, an air pump applying pressurized air to the cuff, an air valve selectively venting the cuff, and a pressure transducer generating an output signal having a D.C. component indicative of the steady-state pressure in the cuff, and an A.C. component indicative of oscillometric pulses. The pressure transducer output is amplified and applied to an analog-to-digital converter which generates a digital word indicative of the steady-state cuff pressure. The amplified pressure transducer output is also applied to one input of a differential amplifier having an output that is applied to an analog-to-digital converter having a limited operating range. The other input of the amplifier receives an offset signal from a voltage source to offset the amplified pressure transducer output so that the output of the differential amplifier will not exceed the operating range of the analog-to-digital converter.

Abstract: A simple system for determining a non-invasive sleep state of a person is described. The system comprises: (a) means for measuring the person's cardiac R-R waves interval; (b) means for calculating the power spectrum of the cardiac R-R interval, thus obtaining a ratio between spectral power in the and high frequencies; (c) means responsive to the measuring and calculating means for generating output signals, one output signal having a first value when said ratio is above a specific predetermined threshold, designated as REM sleep-and one outputs signal having a second value when the above ratio is below this threshold, designated as non-REM sleep, and (d) means responsive to the output signal for designating a time period of predetermined duration as a REM period or a non-REM period, respectively. The system enables an accurate determination of the sleep state.

Abstract: The application is directed to a method for automatically classifying intracardiac electrograms, and a system for performing the method. In a further aspect, it concerns an implantable cardioverter defibrillator which incorporates the system and uses the method to monitor cardiac activity and deliver appropriate treatment. The method uses a combination of timing analysis and pattern matching using a neural network in order to correctly classify the electrograms. This technique allows both changes in rate and morphology to be taken into account.

Abstract: A method and system for treating a patient having a pathological condition characterized by asymmetry between brain waves measured from two locations of the scalp. The method comprises the steps of attaching a first electrode to a first scalp location of the patient and a second electrode to a second scalp location of the patient. Then, brain waves of the patient are recorded from the electrodes. These brain waves are used for the purpose of biofeedback. Specifically, the brain wave asymmetry is presented to the patient and the patient is rewarded for changing the asymmetry.

Abstract: An appliance for supporting a woman during childbirth includes a flexible supporting part of flat design for supporting the woman's back, buttocks and thighs. Attached to the supporting part are suspension elements by means of which the supporting part can be suspended. The supporting part preferably has a basic shape in the form of an elongate quadrilateral, with two longitudinal sides, a head side and a leg side. The leg side is bent in or recessed thereby forming two tabs which are intended for supporting the thighs and between which the child-bearing region in the vicinity of the woman's vagina remains freely accessible. By adjusting the suspension height of the head side or leg side, the position of the supporting part and therefore the woman's position can be selected, any position from an upright posture to a supine position being possible.

Abstract: According to the process for applying reshaping to hair by use of a hair-curler, the hair-curler (1) is arranged in such a way that the perimeter along which the lock of hair (M) is rolled increases by approx. 2 to 3% when its temperature rises to pass from a starting temperature to a higher temperature which nevertheless remains lower than a relatively low limit thus avoiding the burning of the hair and/or of the scalp; the longitudinal section of the curler is sufficient to withstand the stresses imposed by elongation of the lock of hair; the lock of hair is rolled around the curler at the starting temperature so that the hair is retained against the hair-curler; the curler is raised to the said higher temperature; the hair is thus subjected to elongation ensuring an increase in the life of the reshaping applied to the hair.

Abstract: A germicidal dental floss having a coating of the active material typically a phenol derivative/compound removably fixed thereon by a binder such as wax. The active material is rubbed off by contact with the teeth thereby treating areas between the teeth and gums for improved oral hygiene.

Abstract: A dental floss tool has a short flat handle in a first plane, with a floss winding post extending from the upper surface thereof. Extending downwardly from the lower surface are a pair of spaced legs attached to the handle at one end and spaced apart from one another at the opposite end thereof. Guide grooves are placed on the legs for guiding dental floss from the winding post to the end of the first or outermost leg, back to the second leg, and then upwardly through a hole in the handle located between the winding post and the second leg, back to the winding post. The floss, which extends from the lower end of the second leg through the hole, then may be engaged by the thumb of the user to adjust the tension of the floss extending between the ends of the two legs.

Abstract: A system for protecting golf clubs and a golf bag from exposure to natural elements such as rain. The system includes a protective cover comprising a club head protector for covering the head of a respective golf club, a compartment, such as a hidden pocket, located on the club head protector, and a sack-like waterproof hood attached, by its closed end, to the inside of the hidden pocket. The system further includes a method of use of the protective cover which includes storing the hood out of view when the hood is not being used. If rainfall or other hazardous condition appears imminent, the method includes drawing the hood outwardly from the pocket and reversing the hood so that the club head protector is moved from a first position outside the hood to a second position inside the hood.

Abstract: An umbrella that when folded functions as a conventional flashlight, and when opened functions as an umbrella with a two-way flashlight handle. The flashlight handle contains two lamps/reflectors. One is located in the side of the umbrella handle. The other is positioned in the base of the handle. The handle also serves as a battery compartment for a plurality of "AA" size batteries. The lamp/reflector at the base of said handle is intended to produce the illuminating power of a conventional flashlight. The lamp/reflector at the side of said handle is intended to provide illumination for the forward path of the umbrella user when the umbrella is fully extended. The side lamp/reflector is positioned to direct light onto the forward path of the user when the handle is held vertically. Either lamp may be activated at a time via a two-way switch, located on side of said handle, when said umbrella is either folded or fully extended.

Abstract: An integral, removable walker seat is easily attachable and detachable by persons having limited dexterity, and can be folded and transported when not in use. The walker seat comprises a substantially rectangular sheet of flexible material on which the user can sit. The sheet is attachable to opposite horizontal frame members of the walker via two pairs of bars affixed to the narrow ends of the sheet. The sheet and the bars cooperate to form a seat when the sheet is suspended across and engaged to the opposite horizontal frame members of the walker.

Abstract: A tent frame comprising a frame-carrying base; means for mounting the base, in use, on a mobile platform such as the roof of a vehicle; an elongate frame member constituting the ridge frame member of the ultimately-assembled tent frame; and respective arms and legs each mounted or adapted for mounting upon the ridge frame member in such a way that the arms can extend from the ridge frame member outwardly, and the legs can extend from the arms generally downwardly, to form the side frame members of the ultimately-assembled tent frame; characterized by the features that the ridge frame member, the base, and some at least of the frame's arms and legs, are packaged in such a way that when the package is mounted on the mobile platform and conveyed to an intended site of use, (a) sufficient of the frame can be assembled for the frame to be self-supported on the surface on which the vehicle rests; (b) the thus-far-assembled frame is then readily separable from the platform; and (c) the frame side members do not then

Abstract: A first and second sensor and alarm member is mounted relative to a gas appliance, and more particularly to the diverter housing and adjacent a lower portion of the gas appliance for detection of spillage in the form of flue restriction relative to the first sensor or roll-out sensing relative to gas fumes backed up relative to the flame portion of the gas appliance.

Abstract: An hydraulically assisted inlet valve is disclosed having a by-pass passage (32) which is permanently open. Preferably the valve has a valve body (13) reciprocally mounted in the inlet (4) and carried by a diaphragm (23). The by-pass passage preferably extends through the valve body (13) to apply inlet pressure to one side of the diaphragm.

Abstract: This invention is intended to control the flow rate and pressure in a valve body by operating a throttling valve connected to the opening of the valve body by a remote pipe. The construction of the control valve is as follows: A spool type pressure compensated control valve 3 is installed on the upstream side of a flow passage of the valve body having an inlet 2 and an outlet 5, and a variable orifice 3' is formed on the pressure compensated control valve 3. On the downstream of the pressure compensated control valve 3 is installed a flow control throttling valve 4, which is urged by a spring 7 in the direction of closing the flow passage. The spring chamber 12' of the flow control throttling valve 4 is connected to the outlet 5 through a central passage 12 in the throttling valve 4. A chamber 20 at the other end of the flow control throttling valve 4 is connected to the inlet 2 via a variable throttle 16, and is also open to the outside of the valve body.

Abstract: A constant flow rare controller valve includes a piston spring biased towards the top of the valve. Fluid or gas flowing into the valve increases the forces in the chamber above the piston, forcing the piston toward a valve seat. The piston is thus seated in the valve seat, blocking gas or fluid flow to the outlet port. The forces on the piston in the chamber below the piston builds as flow goes through the piston until the forces in this chamber including the piston spring force is greater than the forces in the chamber above the piston. The piston then is lifted from the valve seat, and the pathway to the outlet orifice is opened. Fluid or gas flows through the piston via the calibrated orifice. An equilibrium flow rate is reached by variation in the piston position based on the location of the movable seat which sets and maintains a constant differential pressure across the piston thus maintaining constant flow.

Abstract: An excess flow valve comprising a valve body defining a passage for a flow of fluid therethrough, the passage having an inlet and an outlet for fluid, a magnetically attractable closure member movably located within the passage for movement toward and away from the outlet, a seat located adjacent to the outlet for receiving the closure member. A flow restriction assembly is located in the passage for defining at least two flow paths for fluid along the passage, the flow restriction assembly including a retaining member comprising a permanent magnet for retaining the closure member in one of the flow paths and away from the seat whilst there is a flow rate of fluid through the passage which is less than a predetermined rate, the retaining member releasing the closure member when the flow rate of fluid through the passage equals or exceeds the predetermined rate so that the closure member moves toward the outlet to engage the seat and shut off flow of fluid through the outlet.

Abstract: A supply circuit for a hydraulic fluid system has at least one pressure generation device, at least one connecting valve, a main line and a safety deactivation unit. The supply circuit permits a hydraulic fluid to be fed in such a way that, in all operating states, occurrence of pressure surges in the system is prevented. The connecting valve is designed as a slide valve with three control edges for regulating filling, operation and testing functions. A plate valve, in fluid communication with the slide control valve, is designed as an outflow amplifier and fulfills the safety related tasks.