Abstract: The pump includes a housing containing a hollow elongated part, a piston arranged to move back and forth inside an elongated part, an inlet port and an outlet port arranged so that a fluid can be sucked through the inlet port into a chamber during an instroke of the piston and expelled through the outlet port during an outstroke. A linearly and/or angularly actuable valve system has a valve holder mounted on the pump housing which includes at least one through-hole extending from the piston chamber to the housing outer surface. The valve holder contains an inlet and/or outlet to alternately connect the inlet and outlet ports of the volumetric pump.

Abstract: Once the production route by the tubing has been selected, the stem travels through the inside of a guide whose upper end has a diameter adjusted to that of a rod which develops, increasing until it is connected to a barrel. The upper part of a anchor is arranged in the lower part of the barrel. The lower part of the anchor is connected to a nipple fixed to a transfer box. The fluid passage from an admission valve to the barrel in the upward stroke and the emptying of the barrel in the downward stroke is linked at least with a connector disposed between a basket and the transfer box. The basket houses the ball and the seat of at least one production valve arranged together with at least one connector in a carrier body retained between the transfer box on the top and a cage at the bottom and fitted to a conduit. The admission valve is housed inside the cage and it is provided with a ball that releases or obstructs the fluid passage.

Abstract: A drive device, comprising a housing, a rod, a limiting device, a sliding block, a rotating block, a pair of springs, a pair of first grooves, and a second groove. The rod passes through the sliding block, an axis is disposed on the sliding block, the rotating block is disposed on the axis, the springs are disposed on both sides of the rotating block, the top of the spring is contacted with one side of the rotating block, the first grooves are disposed on one side of the rod opposite to the housing, the second groove is disposed on inner side of the housing opposite to the first groove, a middle part of the second groove is lower than other parts thereof, one end of the rotating block slides in the second groove, and the other end of the rotating block slides in and between the first grooves.

Abstract: Provided is an automated syringe pump that includes a syringe plunger controller and an elastic member, such as a spring, positioned between a rigid member and a syringe plunger retainer. The controller may include a transducer, such as a linear potentiometer, for generating a signal representative of force applied to a syringe plunger present in the syringe plunger retainer. In addition, the controller may include a proportional-integral-derivative (PID) controller that provides for at least one of constant pressure on the syringe plunger and constant flow rate of fluid out of a syringe operated by the automated syringe pump. Also provided are methods, systems and kits using the automated syringe pumps.

Abstract: A concrete pump includes a hopper having a plate with a pair of openings and an S-tube valve assembly which is movable between the two openings. The valve assembly includes an S-tube which is connected to a mounting plate which is pivotally mounted on the hopper. A wear ring is movably supported within an opening in the valve assembly and engages the hopper plate. A retainer ring is positioned within the opening of the valve assembly and engages a flange on the valve assembly. A resilient spring is positioned between the wear ring and the retainer ring and resiliently urges the wear ring against the hopper plate.

Abstract: A pivot pipe for a two-cylinder thick material sludge pump is designed to reduce the rate of wear of the sealing surfaces and flow bores of the pivot pipe and cooperating outlets on the two pump cylinders. As the pivot pipe oscillates from one pump cylinder to the other pump cylinder the contacting sealing surfaces are subjected to abrasion and impact wear. The present invention limits the rate of wear between the contacting sealing surfaces and a portion of the flow bore by fixing monolithic wearing rings on the upstream end of the pivot pipe and on the outlets of the two pump cylinders. The monolithic wearing rings are made of a hard materials such as cemented tungsten carbide.

Abstract: A metering device for liquids, especially for viscous liquids, preferably liquids which are to be metered under sterile conditions, with a plurality of metering pumps which can be simultaneously actuated. To achieve an optimized mode of operation, it is provided that the surfaces on the bottom of the pump holding plate and the top of the metering channel plate are made as adjoining sealing surfaces, forming a seal, that, in the pump holding plate, there is a bypass channel with outlet openings in the sealing surface on the bottom of the pump holding plate for each metering pump and that by the relative displacement of the pump holding plate and the metering channel plate with respect to one another, the outlet openings of the bypass channel can be moved into a position in which the bypass channel connects the respective metering channel to the respective supply channel in the metering channel plate.

Abstract: A two-cylinder thick-matter pump for continuous delivery of thick matter is characterized in that a reversing valve (5) has a diverter housing (8, 8′) with at least four openings (a-b), the diverter (6, 6′) disposed in the diverter housing (8, 8′) is swiveled with its outlet opening in front of the cylinder openings and has an inlet opening (RE) which is firmly connected with the suction pipe (3), the cavity (H) in the diverter housing (8, 8′) being constantly under delivery pressure, and at least one shut-off element (10) being provided for closing the suction pipe (3) and/or the first and/or second openings (a , b) of the diverter housing (8, 8′).

Abstract: A shuttle valve for use in a pumping apparatus for pumping concrete or the like. The valve uses belleville springs to hold a wear ring against the concrete hopper, thereby creating a seal.

Abstract: An air pump has a positioning seat provided to have two mouths each with an inner thread formed on an inner face thereof and an outer thread formed on an outer face thereof and a nozzle formed to adjust to an inlet of a tire; and two pump barrels each corresponding to one of the mouths to pump the air out from the nozzle. The two mouths of the positioning seat enables the user to operate the air pump in opposite directions simultaneously.

Abstract: An improved method and apparatus for pressure processing a pumpable substance are shown and described. In a preferred embodiment, a valve is coupled to a source of a pumpable substance and a pressure vessel, the valve being movable to a first, second and third position. When the valve is in a first position, an inlet port in the valve is aligned with a passageway that is open to the pressure vessel. When the valve is in the second position, the valve body seals the passageway, and when the valve is in the third position, an outlet port provided in the valve is aligned with the passageway.

Abstract: A plunger pump system including a plunger pump, and a shuttle valve connected to the plunger pump having a valve body reciprocally fitted in a hollow portion formed in a valve casing to divide the hollow portion into a liquid supply side chamber and a liquid discharge side chamber. The shuttle valve has a liquid supply hole which provides communication between a liquid supply line and the liquid supply side chamber and which is closed by a first end surface of the valve body when the delivery pressure of the liquid is higher than the supply pressure of the liquid. A first connecting hole provides communication between the pump liquid supply hole and the liquid supply side chamber. A liquid discharge hole provides communication between a liquid discharge line and the liquid discharge side chamber and is closed by a second end surface of the valve body when the supply pressure of the liquid is higher than the delivery pressure of the liquid.

Abstract: A plunger pump system including a plunger pump, and a shuttle valve connected to the plunger pump having a valve body reciprocally fitted in a hollow portion formed in a valve casing to divide the hollow portion into a liquid supply side chamber and a liquid discharge side chamber. The shuttle valve has a liquid supply hole which provides communication between a liquid supply line and the liquid supply side chamber and which is closed by a first end surface of the valve body when the delivery pressure of the liquid is higher than the supply pressure of the liquid. A first connecting hole provides communication between the pump liquid supply hole and the liquid supply side chamber. A liquid discharge hole provides communication between a liquid discharge line and the liquid discharge side chamber and is closed by a second end surface of the valve body when the supply pressure of the liquid is higher than the delivery pressure of the liquid.

Abstract: A metering apparatus has a metering chamber which has at least one boundary surface in the form of a flexible diaphragm. The diaphragm is operatively connected to an actuating device so that the volume of the chamber for metering and deliveirng the substance can be varied. An inlet opening and an outlet opening in the metering chamber can preferably be closed off directly by the diaphragm, more specifically by means of closure devices arranged in the region of those openings. The metering apparatus is particularly suitable for die bonders for the delivery of a bonding agent onto a substrate which is then equipped with electronic components.

Abstract: A fluid pump has two pairs of rectangular oppositely-disposed pistons. The pistons of each pair travel simultaneously in opposite directions at the same speed and over the same distance. Valving is provided by a reciprocating port plate, in face-to-face relation to the piston, driven in a circular path from two spaced crankpins and which in turn drives the associated piston. The sliding movement of the port plate controls the alignment of inlet and exhaust ports in the piston and port plate. The excursion or "throw" of the pistons can be varied from zero to maximum. A crankpin throw-adjusting mechanism simultaneously adjusts the throw of each crankpin, some in one direction, some in the opposite, so that all chambers are automatically adjusted for varying, but always identical, displacements. Self-lubricated seals between the piston and chamber walls are spring loaded, by an elastomerically sealed structure having non-linear deflection-to-force characteristics.

Abstract: An improved, hydraulically controlled pump for coarse, viscous material such as, but not limited to, concrete, and a gate mechanism for the pump.

Abstract: A compact sleeve pump is provided that is particularly adaptable to fluid dispensing systems having multiple pump groupings. The sleeve pump includes a generally cylindrical valving spool and generally cylindrical dispensing piston, shiftably received within opposite ends of a generally tubular pump sleeve. Sealing members shiftably carried between the valving spool and pump sleeve provide, in conjunction with the selective shifting of the valving spool within the pump sleeve, for the inflow and expulsion of fluid from the pump.

Abstract: A reversible, positive displacement, expansible chamber hydraulic pump with only three moving parts. Intended for manual operation where the creation of high fluid pressures is desired, the pump consists of a rotating input shaft with a single eccentric cam. The cam operates both a piston and a slide valve which are located at a relative angle of ninety degrees from one another about the axis of the cam. The slide valve controls fluid flow to and from the pump cylinder such that fluid flow reverses upon reversal of rotation of the input shaft and such that fluid flow is blocked when the piston is at top or bottom dead center.

Abstract: When a valve-controlled pump is to produce either vacuum or pressure at a pump outlet 9 as a function of its direction of rotation it is necessary that a 3/2-way valve be switched as a function of the direction of rotation of the motor of the pump. In accordance with the invention this is effected by a direction detection device on the motor (1) which is coupled with the motor for the control of the 3/2-way valve. The direction detection device is formed in the manner that the motor housing of the motor (1) is mounted for rotation and is provided at its end with a structural part (11) having a control kidney (10) which is movable over a control surface (7). Since the motor housing must take up the counter moment when the motor is rotating, the control kidney (10) shifts upon the starting of the motor (1) into one of its two end positions depending on the direction of rotation of the motor (1), thereby causing the pump outlet (9) to be connected alternatively to pressure or vacuum.

Abstract: A piston filler for metering two fluids intermittently comprising a cylinder having a first and a second inlet conduit and an outlet conduit, means for closing the communication between the cylinder and the first inlet conduit and between the cylinder and the outlet conduit alternately, there being present inside the cylinder a first piston for drawing in a primary fluid from the first inlet conduit and discharging it into the outlet conduit and a second piston for drawing in a secondary fluid from the second inlet conduit which piston has at least one port provided with one or more valves through which the secondary fluid can flow to occupy the space between the two pistons where it can transmit the motion of the second piston to the first piston, and means for conveying secondary fluid from the space between the pistons to the outlet conduit.

Abstract: The described air compressor has an annular piston received within a cylinder for reciprocal movement to drive pressurized air on both piston strokes to an outlet which is arranged in line with the air inlet and driving power source. A shuttle valve alternately opens and closes ports at opposite ends of the pump cylinder to accomplish valving for the pressurized air. Rotative drive applied to an axially located rotor within the compressor housing via a planetary gear assembly alternately drives the rotor in opposite directions. A gear on the rotor is drivingly related to gears located on two threaded shafts which pass through threaded openings in the piston. Accordingly, rotation of the rotor drives the annular piston from one extremity to another in the pump cylinder.

Abstract: An annular piston is received within a suitably dimensioned cylinder and reciprocally driven to pump fluid on both piston strokes to a fluid carrying line with which the pump is arranged in an in-line relationship. A centrally located shuttle-valve alternately opens and closes ports at opposite ends of the pump cylinder to accomplish the required in-line valving for the pump.

Abstract: A pump for metering two fluids comprising a cylinder having a first and second inlet conduit and an outlet conduit, means for closing the communication between the cylinder and the first inlet conduit and between the cylinder and the outlet conduit alternately, there being present inside the cylinder a first floating solid piston for drawing in a primary fluid from the first inlet conduit and discharging it into the outlet conduit and a second piston for drawing in a secondary fluid from the second inlet conduit which piston has at least one port provided with one or more valves through which the secondary fluid can flow to occupy the space between the two pistons where it can transmit the motion of the second piston to the first piston, and a by-pass for conveying secondary fluid from the space between the pistons to the outlet conduit.

Abstract: A compact and highly reliable proportioning pumping system for supplying a precise and controllable mixture of concentrate and water in a kidney dialysis machine comprises a central body and a pair of oppositely mounted pivotable linkages coupled to the body. A first pivotable linkage is coupled by connecting rods to a water metering piston and a concentrate metering piston respectively, a variable stroke ratio being provided by a signal actuated drive coupled to the linkage mechanism and controlling the relative position of the end of one of the connecting rods. The change of position is advantageously effected so as to maintain a precise proportionality between the flows delivered by each of the pistons throughout their variable stroke lengths. The range of proportioning adjustments can be mechanically limited and alarm conditions can readily be detected.

Abstract: A dispensing apparatus for aseptic measurement and filling of a fluid product is proposed, which, particularly as a result of the simple embodiment of a control slide valve, is especially suitable for the development of a multiple dispensing apparatus. A groove-like recess provided in the control slide serves both to connect the fluid reservoir chamber with the dispensing chamber and to connect the dispensing chamber with the particular container to be filled.

Abstract: A cassette and controller for accurately controlling fluid flow through an administration set while maintaining a closed fluid system. Inlet and outlet conduits are defined in a body of the cassette and inlet and outlet valves control fluid flow through the respective conduits. A rigid internal cavity of predetermined volume is also defined in the cassette body with an impermeable and flexible diaphragm spanning the cavity. A control conduit communicates with the internal cavity on an opposite side of the diaphragm from the fluid to alternately exert negative and positive pressure on the diaphragm. Negative pressure causes the diaphragm to conform to the shape of the internal cavity when the inlet valve is open to fill the cavity-shaped diaphragm with fluid from the inlet conduit. Positive pressure against the diaphragm expels fluid from the cavity through the outlet conduit when the outlet valve is opened.

Abstract: An apparatus for dispensing liquid or pasty substances to gelatin capsules and the like, in particular for dispensing pharmaceutical products thereto. In order to maintain the substance to be dispensed in relative motion to prevent deleterious thickening, the apparatus includes a reciprocating dispensing control plunger which periodically enters a capsule or container to be filled. If no container is present and no dispensing is to take place, the control plunger retreats into a position wherein a separate metering piston continues to transport the material but returns it to a storage container via a conrol channel in the control plunger.

Abstract: An automatic drain system for compressed air systems, air dryers, aftercoolers, separators and the like, which eliminates the loss of compressed air and is not clogged by sediment in the accumulated liquid or slurry.

Abstract: A diluting apparatus or pump having first and second chambers coaxially formed in a single pivotally mounted block. A first piston is reciprocally disposed in the first chamber and a second piston is coaxially mounted on the first piston and reciprocally disposed in the second chamber, substantially eliminating any transverse thrusts on the pistons. A spool valve is pivotally mounted on an eccentric pin mounted on a rotating crank to drive the pistons. The valve reciprocates within a valve body to couple the first chamber to a fluid supply line on a return stroke and to couple the first chamber to an output line on a delivery stroke. The second chamber is coupled to the output line on both strokes to draw in a second fluid on the return stroke and discharge it with the fluid from the first chamber on the delivery stroke thus mixing the two fluids.

Abstract: Volumetric pump with a cylinder and a piston reciprocably driven therein, comprising an inlet at one end of the cylinder, ports at each end of the cylinder connected by a passage and a valve controlling the flow in said passage, and a closable outlet connected with the cylinder port at the cylinder end opposite the inlet end.