Abstract: Various embodiments include methods and apparatus structured to pump material, where such material is difficult to pump. In an embodiment, an apparatus can include an injector device capable of self-injecting material into a high pressure line. The apparatus may include multiple valves to control recharge of material into the injector device and to control reinjection of the material into the high pressure line. In an embodiment at a well site, a portion of fluid being injected into a wellbore can be diverted from one or more high pressure pumps to an injector device, where the diverted portion of the fluid can be used to power the injector device to inject material from a mixing tank to add material to the wellbore in addition to the non-diverted portion of the fluid injected into the wellbore. Additional apparatus, systems, and methods can be implemented in a variety of applications.

Abstract: The bellows pump device supplies pressurized air to one air chamber of two hermetic air chambers thereby to cause a bellows to perform expansion operation to suck a transport fluid, and supplies pressurized air to the other air chamber thereby to cause the bellows to perform contraction operation to discharge the transport fluid. The bellows pump device includes: an electropneumatic regulator configured to adjust a first air pressure of the pressurized air to be supplied to the one air chamber, and a second air pressure of the pressurized air to be supplied to the other air chamber; and a control unit configured to control the electropneumatic regulator such that, at least at a time point of end of expansion during expansion operation of the bellows, the first air pressure is lower than the second air pressure.

Abstract: A fuel supply device includes: a linear actuator; a reciprocating pump having a boosting piston driven by the linear actuator, configured to axially reciprocate, and configured to alternately repeat suction of the fuel and ejection of the fuel more boosted than the fuel at a time of suction by reciprocation of the boosting piston; and a controller to control driving of the linear actuator. When reciprocation amplitude of the boosting piston is A (A>0) and a reciprocating cycle time is T, the controller controls the linear actuator so a maximum value of an absolute value of acceleration when the reciprocating pump sucks the fuel with an absolute value of speed of the boosting piston increasing is smaller than A·(2?/T)2, and so a maximum value of the absolute value of the acceleration of the boosting piston when the reciprocating pump ejects the fuel is larger than A·(2?/T)2.

Abstract: The present invention provides a fluid control system and associated methods. The fluid control system includes a source of a pressurized fluid and a first spool valve having at least two positions, wherein the first spool valve is connected in fluid communication with the source of the pressurized fluid. The fluid control system further includes a second spool valve having at least two positions, wherein the second spool valve is connected in fluid communication with the first spool valve and the source of the pressurized fluid. When the first spool valve is in a first position and the second spool valve is in a second position, a first portion of the pressurized fluid is directed from the source of the pressurized fluid to the second spool valve via the first spool valve.

Abstract: The present invention provides a hydraulically driven multiphase pump system and methods for pumping a fluidstream from the surface of a well. The hydraulically driven multiphase pump system consists of two vertically disposed plungers. The plungers are hydraulically controlled and actuated to work in alternate directions during a cycle using a closed loop hydraulic system. Each cycle is automatically re-indexed to assure volumetric balance in the circuits. An indexing circuit ensures that each plunger reaches its full extended position prior to the other plunger reaching its preset retracted position. A bias member and an acceleration valve are used to prime the indexing circuit for use in low or variable inlet pressure situations. A power saving circuit is used to transfer energy from the extending plunger to the retracting plunger.

Abstract: An apparatus is provided for transferring electrically conductive coating materials, such as water-based paint, from a source to at least one coating dispenser such as a spray gun for discharge onto a substrate. In alternative embodiments, the coating material is supplied to the dispenser(s) from parallel flow paths which are comparatively simple and inexpensive in construction, and which are capable of delivering high pressure, high volume flows of coating material while substantially eliminating pressure fluctuations in the coating material supply when switching from one flow path to another.

Abstract: A hydraulic fluid-driven, multicylinder, modular, reciprocating piston pumping machine of non pulsating flow and independently variable forward and return stroke speeds comprises several pumping modules (A, B . . . E) each having one primary cylinder (A1, B1 . . . E1) and one secondary cylinder (A2, B2 . . . E2) coaxially joined by an angularly and radially oscillating bushing (100) through which slides a piston rod (A3, B3 . . . E3) with an angularly oscillating piston (A4, B4 . . . E4; A5, B5 . . . E5) at each of its ends. Each primary cylinder (A1, B1 . . . E1) has the end opposed to the bushing closed by valve monifolds (A11, B11 . . . E11) interconnected through a pressurized hydraulic fluid distritubor conduit (5) through which pressurized hydraulic fluid is supplied to the primary cylinder of each module by at least one hydraulic pump (1, 2). A hydraulic fluid chamber (A18, B18 . . .

Abstract: An apparatus comprising a pair of fluid driven pump assemblies in a back-to-back configuration to yield a bi-directional pump. Each of the pump assemblies includes a piston or diaphragm which divides a chamber therein to define a power section and a pumping section. An intake-exhaust valve is connected to each of the power sections of the pump chambers, and function to direct fluid, such as compressed air, into the power section and exhaust fluid therefrom. At least one of the pistons or diaphragms is connected by a rod assembly which is constructed to define a signal valve, whereby the intake-exhaust valve of one pump assembly is controlled by the position or location of the piston or diaphragm in the other pump assembly through the operation of the rod assembly signal valve. Each of the pumping sections of the pump assemblies are provided with intake and exhaust valves to enable filling of the pumping section with fluid and discharging fluid therefrom when a desired pressure has been reached.

Abstract: A piston pump for conveying fragile particulate food products without damaging the product. The pump includes a filler and a discharge conduit containing piston valves actuated by hydraulic cylinders. The pumping chamber in which the product is compressed is equipped with a linear displacement transducer/magnet sensor which senses not only the position, but the speed of the piston. In response to the sensor, a proportioning valve releases hydraulic fluid at increasing pressure to a desired maximum, to the hydraulic cylinder actuating the piston in the pumping chamber of a second pump operating in tandem with the first pump. The product is expelled alternatively from the two pumps at the maximum desired pressure appropriate for the character of the product. The pump also includes means for flushing the pump without dismantling.

Abstract: Processes and apparatus for the construction of improved tank structures employing a pump metering and delivery system which accurately meters, mixes and evenly applies composite materials to form the walls of tanks or containment vessels. Such systems have specific application to the construction of walls of prestressed tanks formed by inflating a membrane and applying rigidifying material outwardly of said membrane and then prestressing the walls by circumferentially wrapping prestressing material around the same. Promoters, catalyst, and other chemicals are used to create composite walls, each feeding into individual pump systems comprised of at least two hydraulic cylinders connected to supply cylinders which are coordinated so that their strokes are controlled to arrive at a desired flow. The flow is then channeled through a mixer which mixes the material for spraying through a nozzle. The flow from the nozzle can also be intermixed with chopped glass from a chopper system or with granular materials.

Abstract: For the production and exact control and regulation of very high pressures, in particular for actuating a press, two pressure intensifiers are provided which each have a differential piston. The second pressure intensifier is connected via a shutoff valve to the first pressure intensifier and to the load or consumer. Both pressure intensifiers have a small volume compared with the volume required by the consumer. By activating the second pressure intensifier fluid can be exchanged between the consumer and the first pressure intensifier to replenish the first pressure intensifer in a pressure buildup phase and to empty the first pressure intensifier in a pressure relief phase.

Abstract: An apparatus for the construction of improved tank structures employing a pump metering and delivery system which accurately meters, mixes and evenly sprays composite materials to form the walls of tanks or containment vessels. Such systems have specific application to the construction of walls of prestressed tanks formed by inflating a membrane and applying rigidifying material outwardly of the membrane and then prestressing the walls by circumferentially wrapping prestressing material around the same. Promoters, catalyst, and other chemicals are used to create composite walls, each feeding into individual pump systems comprised of at least two hydraulic cylinders connected to supply cylinders which are coordinated so that their strokes are controlled to arrive at a desired flow. The flow is then channeled through a mixer which mixes the material for spraying through a nozzle. The flow from the nozzle can also be intermixed with chopped glass from a chopper system or with granular materials.

Abstract: Continuous extrusion apparatus for continuously deforming an elongated workpiece of indefinite length (e.g. rod) to produce an elongated product of indefinite length (e.g. wire) is disclosed wherein the improvement includes combination of structure for maintaining the elongated workpiece, the moving centrally apertured chamber through which it moves to be deformed by the deforming agency in coaxial alignment with the apparatus centerline during deformation and for maintaining the moving centrally apertured chamber in predetermined geometric shape (e.g. round).

Abstract: A hydraulic intensifier for oil well fracturing and/or erosion drilling, having a pair of intensifier units including a pair of sequentially operated reciprocating ram assemblies powered by hydraulic cylinder motors which are operated to maintain a substantially uniform output fluid pressure from the intensifier unit. Each cylinder motor is supplied from a main source of hydraulic fluid under high pressure which operates on the working faces of the pistons of the cylinder motors. Hydraulic fluid is also supplied to the return face side of each piston in the hydraulic cylinder motor.

Abstract: A dual-unit pump, e.g., a rolling diaphragm piston pump, suitable for pumping an abrasive high-viscosity slurry, is adapted to operate at a constant flow rate by means for detecting and correcting a pressure differential in the two units before the units switch from the pumping cycle to the filling cycle and vice versa. The flow of liquids is controlled by valves of the type which switch the flow to and from the units with essentially no volume change in the liquid inlet and outlet lines.

Abstract: A multiple-mode, multiplex pumping apparatus includes circuit control elements for initializing the apparatus by placing each of the pistons and plungers in each pumping section of the multiplex pumping apparatus at a respective initial starting point. The pumping apparatus also includes electronic circuit elements for controlling the inlet valves, exhaust valves and precompression valves of the hydraulic circuit of the pumping apparatus. The apparatus includes phase control circuit elements for controlling the separation of the leading edges of the plungers of two of the pumping sections of the apparatus when the apparatus is operating as a quadruplex pump. The pumping apparatus also includes elecrtronic circuit elements for insuring that each plunger of each pumping section stops at a fixed stopping point. The apparatus also includes electronic circuit elements for controlling the volume of fluid in the rod end portions of each of the pumping sections.

Abstract: A pump system, particularly suitable for pumping wet mixes and slurries, achieves an output of pumped material substantially free from pulsations or fluctuations by control movement of power pistons (12A,12B) within power cylinders (10A, 10B). The power pistons (12A,12B) are connected by piston rods (14A,14B) to pumping pistons (16A,16B) which suck material to be pumped in through valves (20A,20B) and out through valves (22A,22B) into a delivery pipe (26). A closed loop (32) connects annular chambers (13A,13B) of the power cylinders (10A,10B), and a continuously operating pump (P2) feeds the closed loop (32). The power pistons (12A,12B) on their suction strokes move faster than on the delivery strokes, whereby one or other or both pistons (12A,12B) are always moving forwards.

Abstract: A quadraplex pumping unit for use as a mud pump, an intensifier, or as a pump for abrasive fluids or the like includes four rams and four ram operating pistons. A control valve arrangement provides for pressure equalization and energy transfer from a cylinder which has just extended in a working stroke to a companion cylinder which has just returned to its retracted to rest position, to conserve energy and reduce the thermal burden on the hydraulic system. The valve arrangement further provides for prepressurization, after pressure equalization, prior to an extending stroke.

Abstract: A pumping system which converts a source of gas under pressure to hydraulic fluid under pressure. The system includes three free floating pistons coupled through control valves to the pressurized gas source on one side and through appropriate check valves to hydraulic fluid on the other side. The pistons are reciprocated within respective cylinders by application of the pressurized gas to one side thereof and by application of the return pressure of the hydraulic fluid to the other side thereof. Appropriate porting on the gas side of the pistons sequentially applies the gas under pressure to the three pistons to synchronize reciprocation of them so as to provide a continuous flow of fluid under pressure, upon demand, to a load.

Abstract: A wet blasting machine for permitting deburring of workpieces by utilizing a slurry of water and abrasive particles. The slurry is discharged by a blasting gun against the workpiece, and is then collected within a reclaiming tank. The top water flows from the reclaiming tank into an intermediate settling tank, and the top water is then withdrawn therefrom into a clear water tank. A multiple-section reciprocating pumping unit supplies pressurized water from the clear water tank to the blasting gun, which sucks slurry to the gun from an abrasive particle reservoir located approximately at or above the elevation of the gun. The abrasive particles are supplied to the reservoir from the reclaiming tank.

Abstract: A multicylinder piston pump for pumping viscous liquids of varying composition with each cylinder having an extendible tubular piston intake valve and discharge valve is disclosed. The extendible tubular piston valves have a tubular piston slidably mounted in a cylindrical passage of a housing mounted adjacent to each cylinder. The tubular piston has an inner bore into which an inner piston is slidably mounted therein. The inner piston is connected to a piston rod which is connected to the housing. Hydraulic oil is used to extend each tubular piston valve so as to control the intake and discharge of fluid into the piston pump.

Abstract: Two hydraulic pressure intensifiers are coupled in parallel between a source of hydraulic fluid at relatively low pressure and an output path. Each intensifier provides a pressurizing stroke in only one direction of linear reciprocation. The intensifiers are so operated, under the control of a hydraulic circuit, as to create a tendency for an initial portion of the pressurizing stroke of each of the intensifiers to overlap a final portion of a preceding pressurizing stroke of the other intensifier, and thereby to deliver high pressure hydraulic fluid to the output path simultaneously with continuing delivery from such other intensifier. Such simultaneous delivery does not actually occur, however, since the hydraulic circuit is so arranged that the delivery of high pressure hydraulic fluid from each intensifier to the output line can begin only upon a falling off in the pressure provided by the other intensifier.

Abstract: A fluid power system comprising a steam generator connected to a hydraulic pumping device for delivering steam under pressure to the device for driving the same, while steam is returned to the steam generator via a condenser. The hydraulic pumping device is connected by means of suitable conduits to a plurality of hydraulic motors for driving the same and the conduits include valving means for controlling the direction of fluid between the hydraulic pumping device and the hydraulic motors and returning fluid to a reservoir from which fluid is initially drawn by the hydraulic pumping device. The hydraulic motors provide a rotary output for driving the wheels of a vehicle on which the fluid power system is used. The system further comprises valve means for controlling the pressure at which the system operates.

Abstract: An intensifier unit includes a pair of sequentially operated reciprocating ram assemblies, each powered by a cylinder motor. Extension of the cylinder rods is accomplished by application of pressurized hydraulic fluid to the pistons. The pistons are returned quicker than they are extended by means of continuous application of pressurized air to the back side of the pistons. The cylinder motors are precompressed prior to their respective forward strokes by means of an accumulator which continuously bleeds from the main hydraulic fluid supply line. Circuitry is provided to insure that precompression continues even if the ram and its driving piston move from their retracted position. Also disclosed is a safety interlock to shut down the intensifier if both cylinder rods become accidentally simultaneously extended.