Abstract: A pressure testing apparatus to bring, and maintain, pressure within a test vessel at a proof pressure. The apparatus includes an air motor and a fluid pump which is removably mountable to the air motor. The air motor drives the fluid pump and the pump piston which reciprocatively moves with the motor piston. A precision pressure adjustment unit is located on an outlet side of the fluid pump and includes a chamber and a piston manually adjustable to expel a fluid from the chamber to increase the pressure in the test vessel.

Abstract: A pumping unit, particularly for water supply in remote areas of the world, comprising a pump, control valve and tipping bucket mechanism enclosed in a single housing. The pumping unit is double-acting and, does not demand the presence of a drive pipe. The pump and the automatic control valve are powered by the potential energy of the supply and an independent power source is not necessary or required. The frequency at which the unit operates may be varied by adjustment of the supply of water to the tipping bucket.

Abstract: The invention relates to a high-pressure device (1) having a cylindrical high-pressure vessel (3) and prestressing means in order to exert an axial pressure on the vessel. The vessel (3) can have been formed from a number of layers of composite material, such as glass, carbon or aramide fibers which are oriented in the peripheral direction and are embedded in a matrix of epoxy resin or polyurethane. By applying the axial prestress to the pressure vessel (3), the tangential stress is distributed more uniformly over the wall thickness of the high-pressure vessel (3), the stress decreasing at the inside of the wall and increasing at the outside thereof. As a result, the innermost fibers of a high-pressure vessel (3) made of composite material are subjected to appreciably less stress, which has a beneficial effect on the life of the high-pressure vessel (3), and all fibers of the wall are utilized effectively.

Abstract: An improved fluid proportioner. For improved fluid flow, a body is configured to direct a first fluid wherein at least one fluid gate housing is removably fixed to the body. A bearing pressurably is fitted within the at least one fluid gate housing to seal the first fluid within the body. A fluid gate is disposed within the body configured to gate the first fluid to alternating sides of a motor cylinder having a motor piston sealably disposed within. The motor piston has a cap attached at an end wherein the cap has a concave annular groove. A seal is surroundably disposed around the concave annular groove which radially extends beyond the cap to pressurably engage against the motor cylinder to reduce friction. A slave pump has a inlet valve and a outlet valve with an inlet raised base formed around an inlet orifice and an outlet raised base formed around an outlet orifice.

Abstract: A device for pumping a stock fluid by supplying and discharging a motivating fluid to a unit is described. The device develops the suction and discharge of the stock fluid through the motion of a movable biasing boundary within a cavity. The movable biasing boundary divides the cavity into a stock fluid cell and a motivating-fluid cell. In the case that the movable biasing boundary comprises a piston, a link joined to the piston may extend outside of the unit as a means for driving the piston toward the motivating fluid cell. Each cell communicates with a fluid circuit that includes a source line, a valve or valves and a discharge line. The controlled supply and discharge of the motivating fluid to move the movable biasing boundary creates the discharge and suction of the stock fluid respectively. A valve directs the supply and discharge of the motivating fluid.

Abstract: Two cylindrical pump cylinders are mounted end-to-end. A first piston is placed in the first cylinder, a second piston is placed in the second cylinder, and the pistons are interconnected. In one embodiment compressed air alternately drives the first piston in either direction, causing the interconnected second piston to draw and pump high viscosity liquid in the second cylinder through the use of check valves. In another embodiment compressed air is alternately injected into one side of the first piston and one side of the second piston, thus alternately drawing and pumping liquid on the other side of the pistons. A heating jacket is placed around the cylinder pumping the liquid to heat and thus lower the viscosity of the liquid. Piston movement sensors that sense the limits of piston movement within the cylinders are mounted in the cylinder wall.

Abstract: A pumping unit, particularly for water supply in remote areas of the world, comprising a pump, control valve and tipping bucket mechanism enclosed in a single housing. The pumping unit is double-acting and, does not demand the presence of a drive pipe. The pump and the automatic control valve are powered by the potential energy of the supply and an independent power source is not necessary or required. The frequency at which the unit operates may be varied by adjustment of the supply of water to the tipping bucket.

Abstract: A high-pressure water pump for supplying high pressure water for atomization in the inlet stream of a gas turbine is disclosed which includes at least one hydraulic cylinder containing a piston secured to a piston rod extending from the hydraulic cylinder and defining within the hydraulic cylinder first and second hydraulic chambers on opposite sides thereof, hydraulic oil pump and solenoid valve for selectively supplying oil under high pressure alternately to said hydraulic chambers while releasing oil from the opposite chamber thereby to reciprocate said piston rod, and at least one water cylinder including a housing and a piston therein secured to the piston rod for movement therewith and defining at least one fluid chamber in the cylinder on the side of thereof opposite the piston rod; and check valves in fluid communication with said fluid chamber for allowing water to enter the chamber from a water source when the piston in the water cylinder is moved by the hydraulic cylinder in a direction which enlar

Abstract: An improved fluid proportioner. For improved fluid flow, a body is configured to direct a first fluid wherein at least one fluid gate housing is removably fixed to the body. A bearing pressurably is fitted within the at least one fluid gate housing to seal the first fluid within the body. A fluid gate is disposed within the body configured to gate the first fluid to alternating sides of a motor cylinder having a motor piston sealably disposed within. The motor piston has a cap attached at an end wherein the cap has a concave annular groove. A seal is surroundably disposed around the concave annular groove which radially extends beyond the cap to pressurably engage against the motor cylinder to reduce function. A slave pump has a inlet valve and a outlet valve with an inlet raised base formed around an inlet orifice and an outlet raised base formed around an outlet orifice.

Abstract: A pump having both a short stroke pumping mode and a long stroke pumping mode. The pump has two material cylinders, each with an attached hydraulic cylinder for operating a piston rod extending through both the material and hydraulic cylinders. The piston rods are driven by hydraulic fluid supplied to the hydraulic cylinders and are synchronized so that as one piston rod extends, the other piston rod retracts. The piston rods draw material into the material cylinders when retracting, and pump material out of the material cylinders when extending. To pump in a short stroke mode, a diverter valve is placed between the hydraulic pump and the hydraulic cylinders which diverts an amount of hydraulic fluid to the cylinders, causing the hydraulic pistons to only be extended about half the length of the hydraulic cylinder.

Abstract: A suction muffler for a compressor employed in a home appliance having a refrigeration cycle reduces noise produced by the compressor. The suction muffler includes a muffler body and a refrigerant suction pipe. The muffler body defines a resonance chamber and is coupled to a refrigerant supply pipe. The refrigerant suction pipe connects the resonance chamber to a compressor cylinder. The refrigerant suction pipe has at least one hole formed in its cylindrical wall. The muffler further includes a guiding portion in the resonance chamber to direct refrigerant from the supply pipe to the at least one hole in the refrigerant suction pipe and to direct noise exiting an upper end of the refrigerant suction pipe away from the refrigerant supply pipe. The suction muffler shortens the refrigerant flow path and lengthens the noise transmission path, thereby reducing the level of noise emitted while increasing efficiency of the compressor.

Abstract: A double-force type pressure cylinder structure includes a gas cylinder secured on a pressurizing cylinder base, and a top cap secured on the gas cylinder. The pressurizing cylinder base has a liquid inlet port forming a first check valve, a liquid outlet port forming a second check valve, and a pressurizing cylinder chamber for receiving a piston rod. The gas cylinder includes a piston, a spring biased between the piston and an end face of the pressurizing cylinder base so that the piston is pushed upward by the spring. The circuit of the compressed air is controlled by air holes in conjunction with the spring so that the piston and the piston rod are reciprocally moved quickly for compressing the hydraulic oil at a high speed, thereby forming a thrust with a high pressure.

Abstract: A double-acting reciprocating motor with uni-directional fluid flow path comprises a piston disposed within a cylinder. A first chamber is defined by the cylinder space between the piston and a cylinder base. A second chamber is defined by the cylinder space between the piston and a cylinder head. Fluid is introduced into the motor through an inlet port and into the first chamber. A pass-through valve controls the flow of fluid from the first chamber to the second chamber. An outlet valve regulates the draining of fluid from the second chamber through an outlet port. The outlet port and the inlet port are associated with opposite ends of the motor. Differential fluid pressure urges the piston towards the cylinder head when the pass-through valve is closed and the outlet valve is open. The piston surface facing the second chamber is larger than the piston surface facing the first chamber, so the piston moves towards the cylinder base when the pass-through valve is open and the outlet valve is closed.

Abstract: A pump comprises a reciprocating piston movable in a piston chamber by pneumatic pressure. The pneumatic pressure is directed through air channels by one or more valves. At least one of the valves and/or air channels is located in a removable portion of the pump.

Abstract: A method of detecting an air pocket in a concrete pump and minimizing the effect of the nozzle and boom reaction as the air pocket reaches the end of the boom. The hydraulic pressure of the pump is monitored to determine when a pump stroke contains air. Upon detection of air in a pump stroke, an alarm is sounded and the pump is slowed to minimize the effect of the air pocket when it reaches the nozzle of the boom.

Abstract: A bulk material pump device includes first and second hydraulic drive cylinders capable of causing alternate reciprocating movement of the corresponding pumping pistons to pump concrete contained in a hopper through a transportation conduit. The first drive cylinder has a cylinder housing whose bore is divided into a base chamber and a head chamber by a drive piston slidably received in the cylinder housing. The base chamber is in fluid communication with an oil pump while the head chamber is connected to the second drive cylinder. Under a loaded operation condition, a part of the pressurized oil in the base chamber is admitted into the head chamber via a head bypass line at the end of retracting movement of the drive piston and almost the same amount of the oil is returned back from the head chamber to the base chamber via a base bypass line at the end of extending movement thereof.

Abstract: A pressure intensifier for fluids, particularly for hydraulic liquids, includes a piston/cylinder arrangement with a low pressure side provided with a low pressure connection and a high pressure side provided with a low pressure connection and a supply connection, as well as an intensifier piston constructed as a double diameter piston arranged between the low pressure side and the high pressure side. The pressure intensifier further includes a valve slide member which alternatingly connects the low pressure connection to a pressure source and a negative pressure source, wherein the control valve is connected through a control line to the piston/cylinder arrangement, so that the pressure in the control line acts on a first side of the valve slide member. The control valve is configured such that a constant force acts on a second side of the valve slide member.

Abstract: A pump having both a short stroke pumping mode and a long stroke pumping mode. The pump has two material cylinders, each with an attached hydraulic cylinder for operating a piston rod extending through both the material and hydraulic cylinders. The piston rods are driven by hydraulic fluid supplied to the hydraulic cylinders and are synchronized so that as one piston rod extends, the other piston rod retracts. The piston rods draw material into the material cylinders when retracting, and pump material out of the material cylinders when extending. To pump in a short stroke mode, a diverter valve is placed between the hydraulic pump and the hydraulic cylinders which diverts an amount of hydraulic fluid to the cylinders, causing the hydraulic pistons to only be extended about half the length of the hydraulic cylinder.

Abstract: The present invention relates to a diaphragm pump comprising an entirely pneumatic control mechanism, which has a double acting jack (18), to which is connected a diaphragm (19), delivery being obtained by the pressurizing of several chambers (15, 16, 17), admission being obtained by the preparation of a first chamber (15), the other chambers (16, 17) being under atmospheric pressure.

Abstract: A pilot control valve for controlling a reciprocating pump having a valve member shiftable within a valve body between a first or “downstroke” position and a second or “upstroke” position. When the valve member is in its first position, the valve member allows communication of control fluid to the lower surface of a piston to move the piston from a first position to a second position. As the piston reaches its second position, a vent in a rod attached to the piston allows control fluid acting on the valve member to depressurize. As such control fluid is depressurized, pressurized control fluid acts on the valve member to move the valve member from its first position to its second position. In its second position, the valve member blocks communication of the control fluid to the lower surface of the piston and allows communication of the control fluid to the upper surface of the piston causing the piston to return to its first position.

Abstract: A dual acting pump for dispensing pressurized liquids including a pump housing, a reciprocating pump shaft contained in a pumping chamber and at least one spring-biased check valve member. In the preferred embodiment, a spring-biased check valve member is connected to one end of the pump shaft for closing a flow passage in the pump shaft during movement in one direction and for opening the flow passage during movement in the opposite direction. Similar spring-biased check valves are connected to the pump inlet and pump outlet. The check valves comprise hollow balls and, in combination with the springs, this assures that liquid output from the pump is not reduced significantly when the pump shaft changes direction.

Abstract: A pneumatically operated reciprocating pump and pneumatic control means therefor having in separate chambers a geared air flow control mechanism and a piston/piston rod sub-assembly. The geared air flow control mechanism has two toothed gear members, the first being quasi-circular with upper and lower fins and the second being semi-circular and having two sealing members and fins attached thereto. The gear members are mounted in tooth meshing relationship within a gear chamber disposed above the piston chamber. Two sealable passages connect the gear chamber to the piston chamber, one passage communicating directly with that portion of the piston chamber above the piston and the other communicating by means of an external tube system with that portion of the piston chamber beneath the piston. The gear having the two sealing members attached thereto is disposed so that each sealing member will alternately properly seal a corresponding sealable passage when the gear is sufficiently rotated thereto.

Abstract: A governor for fluid powered diaphragm pumps is shown and described. At least one pump member or oscillatory member moves in response to the varying pressures in the inner chambers of the diaphragm pump. Thus, each pump member or oscillatory member moves at the frequency at which the pump operates. Each pump member pumps fluid through a hydraulic circuit. The fluid flowing through the hydraulic circuit moves a flow regulator disposed in the line that provides communication between the air or power fluid supply and the main air valve or main valve with a pump. In the event the pump operates too fast or at too high a frequency, the pump member or members will pump hydraulic fluid through the circuit at a sufficient flowrate so as to move the flow regulator to a position where it reduces the flow rate of power fluid to the main valve of the pump.

Abstract: A metering pump includes a motor compartment with a drive compartment defining a drive chamber. The drive chamber has an inlet and an outlet for a main liquid. A drive piston is moveably arranged in reciprocating translational motion in the drive chamber. A controller for controlling the movement of the drive piston under the action of the main liquid. A metering compartment defines a metering chamber. The metering chamber has an inlet and an outlet for an auxiliary liquid. The outlet for the metering chamber is separated from the outlet of the driving chamber. A metering piston is arranged in the metering chamber. The metering piston is driven by the drive piston. A frustoconical sealing member is arranged with its small base facing the drive compartment. An extension of the metering piston has a diameter smaller than a body of the metering piston. The extension and the frustoconical sealing member form a suction valve. A suction-delivery portion is arranged on the metering piston.

Abstract: The invention relates to a piston pump for thick matter such as concrete, sewage sludge, excavated tunnel material and similar. The inventive piston pump has at least one hydraulically operated pump cylinder (10, 12). The pump piston (30) of said pump cylinder (10, 12) is connected to the piston (38) of a hydraulic drive cylinder (26, 28) by a common piston rod (34). A water box (42) is situated between the pump cylinders (10, 12) and the drive cylinders (26, 28), the piston rod (34) passing through said water box (42) for cleaning purposes. Said water box (42) has an assembly opening (44) at the top end, said opening being accessible from above, and a closeable water outlet nozzle (66) located at the bottom end. The water box also has an assembly opening located at the bottom end for easier assembly. Said bottom-end assembly opening (54) can be closed in such a way that it is liquid-tight by means of a removable base plate (52).

Abstract: An intensifier pump for a water jet pump includes an exterior cylinder having a fluid inlet port and a fluid outlet port. A valve is disposed at the fluid outlet port. The intensifier pump includes a piston head and a plunger disposed within the exterior cylinder and which is driven by fluid entering the inlet port. An interior cylinder is disposed within the exterior cylinder. A piston having an anterior plunger is disposed within the interior cylinder and is driven by the plunger for compressing a fluid in a compression chamber to flow through the valve. A ceramic liner is disposed within the interior cylinder and circumferentially disposed around the compression chamber.

Abstract: It is intended to provide a piston type gas compressor capable of replacing a seal ring of a piston with a new one while preventing incorporation of metallic particles into a processing gas. A gas suction port 9 and a gas discharge port 10 are formed in a flange 2 of a cylinder 3 in communication with a gas compressing space H. With a plug 7 removed from an internally threaded hole 6A, a free piston 5, together with a seal ring 4, can be inserted into and removed from the cylinder 3 through the internally threaded hole 6A.

Abstract: A fluid driven reciprocating engine includes a main body having an inlet for receiving a primary fluid and an outlet for discharging the fluid. A drive piston is sealingly mounted in the main body for reciprocating movement in response to flow of the primary fluid through the body. The drive piston divides the body into first and second chambers. A first valve selectively transmits the primary fluid from the inlet to the first and second chambers and a second valve selectively transmits the primary fluid from the first and second chambers to the outlet. An overcenter linkage mechanism that operably interconnects the drive piston and the first and second valves.

Abstract: The invention is a method for producing reservoir fluids from an underground reservoir through the wellbore. The method includes the steps of intaking the gas phase from the wellbore into the wellbore-contained pump drive, powering the pump drive using the gas pressure of the gas phase in the wellbore, pumping the liquid phase from the wellbore towards the surface by a first pump and exhausting the gas phase from the pump drive towards the surface.

Abstract: This invention provides the structure and operation of a double-acting, deep-well fluid extraction pump assembly which includes a power piston housed on top of a pumping piston along with a power control system. The pumping piston has a dynamic, reciprocating, bi-directionally self-cleaning, suction filter and houses poppet-type, uni-directional, fluid flow control valves that control the inflow and outflow of extracted fluid through the pumping piston. Gland membranes and a number of double-acting, lineal, fluid motor pistons divide the power piston into pressure chambers and into fluid conduits, with the divisions conjointly providing a path for inflow of hydraulic power fluid and a path for outflow of extracted fluid. The power control system includes a four-way, directional, flow-control valve for controlling cycling frequency, a timer and a flow switch for controlling recovery periods, an unloading relief valve for controlling fluid pressure and a flow-control valve for controlling pumping speed.

Abstract: A liquid feeding pump includes two coaxial cylinder chambers, a piston mounted in each chamber, and a piston rod connecting the pistons. A head side of one cylinder chamber functions as a liquid chamber, a rod side functions as a first air chamber, a rod-side of the other cylinder chamber functions as a second air chamber, and a head side functions as a third air chamber. The liquid chamber is formed with liquid inlets or outlets. Each of the air chambers is formed with air inlets or outlets, a part of the supplying pipes connected to the liquid inlet or outlet of the liquid chamber is wound around an outer periphery of the other cylinder chamber, or a peripheral wall of the other cylinder chamber is formed with a liquid cooling chamber and supplying pipes communicated with and connected to the liquid inlets or outlets of the liquid chamber are connected to the liquid cooling chamber.

Abstract: A capsule-type dosing pump wherein the minimum volume of the pump capsule is reduced substantially to zero through use of a stationary capsule wall which is shaped so as to complement, i.e., to conform to, the bulged-out shape of the capsule diaphragm when in its most forward position, and wherein means are provided for ensuring that the capsule diaphragm, when in its most forward position thereof, will lie flush against the complementary surface of the stationary capsule wall so as to prevent pockets of liquids from forming therebetween.

Abstract: A high-pressure pump having a high-pressure cylinder which has a vertically moving plunger fitted therein from the upper side thereof. The high-pressure cylinder has at least one opening in the bottommost portion thereof to allow a fluid to flow in or out of the high-pressure cylinder. A hydraulic cylinder for driving the plunger is provided on the top of the high-pressure cylinder. In addition, a migration preventing device is provided between the hydraulic cylinder and the high-pressure cylinder and in contact with the plunger driving shaft to prevent migration of a working fluid leaking out from the hydraulic cylinder to the surface of the plunger fitted in the high-pressure cylinder.

Abstract: This invention features a small-enveloped (with an outside diameter of at least approximately 38 mm), single-acting, hydraulically-operated, reciprocating, deep-well, fluid-extraction pump, operable in non-straight and angular wells, and its mode of operation. The hydraulically-operated, deep-well pump, in addition to having an above-ground installation of its motor-fluid generator and of its control valving, comprises a compound, stepped piston that is reciprocably mounted within a cylinder which in turn is divided into individual pressure chambers. Hydrostatic pressure created by a hydraulic pump is selectively directed to two outlet ports to produce an overpressure in one of the outlet ports at any given instant. The overpressure in each outlet port leads to creation of overpressure in one or more pressure chambers. Imbalances in pressure among the pressure chambers result in movement of the compound, stepped piston and extraction of hydraulic-well fluid by the compound, stepped piston.

Abstract: The present invention utilizes a combined dual piston and cylinder arrangement surrounded by a sleeve all mounted within a container which is in turn placed within a drill collar. The pressure of the drilling mud within the drill string drives the pressure pump of the present invention by forcing the piston up and down. Stops on the piston rod maneuver a sleeve which opens and closes inlets and outlets so that the desired flow can be obtained to drive the cylinder, piston and rod arrangement up and down. When the pistons are driven downward, drilling mud is forced through a conduit into a drill bit and out a jet nozzle at a high pressure so as to facilitate the fracturing and removal of the formation being drilled.

Abstract: An air pressure pump with reversible power cylinder comprises a cylinder, a left cap and a right cap disposed at two sides of the cylinder. A piston passes through the cylinder. An air inlet pipe and two air outlet pipes connect the left cap. A collar has five lead holes. The collar surrounds a movable sleeve. Two ring grooves are formed on the movable sleeve. Two passages are disposed on the left cap. The right cap has a central hole to receive a pump. The pump has a central hole to support a rod. A Second valve seat is disposed at the bottom of the pump. A through hole is in the second valve seat.

Abstract: A pumping apparatus which is particularly useful in catheterization procedures has two pumps supported in a parallel arrangement. The pumps are engaged by an actuating rod connected to a power cylinder which reciprocates longitudinally between the two pumps. The two pumps are held within the housing such that only the plunger element of one pump is capable of movement in response to the actuating member while only the barrel element of the other pump is capable of movement in response to the actuating member. By way of this linkage, during movement of the actuating rod, one pump performs a pumping stroke while the other pump performs a suction stroke.

Abstract: In a hydraulic control device for a viscous fluid pump with at least one feed cylinder (11) drivable by a hydraulic cylinder (12), the feed chamber (17) of which can be alternately connected via a hydraulically operable inlet valve (18) a hydraulically operable outlet valve (21) to a reservoir (19) and a feed line (22), whereby in the loading phase of the feed cylinder (11) the inlet valve (18) is open and the outlet valve (21) closed and in the feed phase of the feed cylinder, in which its piston is driven so as to reduce the volume in the feed chamber (17), the outlet valve is open and the inlet valve is closed, and with a hydraulic sequence control actuating the correct cyclic changeover between the inlet and outlet valves and the changeover of the pump drive, a valve forming part of the changeover control device of the sequence control and relieving the pressure in the feed chamber of the control cylinder (53) designed to actuate the outlet valve (21) takes the form of an electrically or hydraulically act

Abstract: A direct action fluid motor and injection pump is disclosed which injects small quantities of a second fluid into a primary fluid stream. A housing has an inlet and an outlet connected to a primary fluid conduit. The housing contains a stepped piston which reciprocates in response to the fluid pressure applied alternately to the closed small and large face of the piston. A valve set alternately closes one and opens the other of the faces. A valve positioner carried with the piston is held in alternate stable positions by cooperating springs on the valve positioner and a post in the piston. Stop members are located above and below the piston travel, each associated with an actuating spring. The valve positioner is preshifted at the end of the stroke, using the full force of the piston, by stop members to move the valve positioner and valve set to an intermediate unstable position.

Abstract: The device (D) for controlling the reciprocating displacements of a differential piston (1) includes at least one valve associated with each of the parts of different cross-sections of the piston (1), and a rocker mechanism (B) urged by a spring in a direction transverse to the direction of displacement of the piston (1). The rocker mechanism (B) is designed to control the valves in closure and/or opening at each end of stroke in order to reverse the movement of the piston (1); a push rod (55) is mounted so that it slides relative to the piston (1), whilst being able to be driven by this piston, the push rod being capable of coming to bear, at each end of stroke, against a limit stop (s, 14a) connected to the enclosure, in order to give rise to the rocking of the mechanism (B).

Abstract: A booster pump for a reverse osmosis water purification system. The booster pump has a spring return piston that is stroked by the pressure of feedwater. The pump also has a pair of solenoid control valves that control the flow of feedwater into and out of the pump to move the piston between stroke and return positions. The control valves are switched by a detector switch which detects when the piston reaches the fully stroked and return positions.

Abstract: A reverse osmosis system includes a reverse osmosis module with a reverse osmosis membrane and having an inlet port coupled to a source of feed water under predetermined pressure via a feed water inlet conduit, a product water outlet port for filtered outlet product water, and a flush water inlet port. A reciprocating pump is coupled into the feed water inlet conduit between the source of feed water and the inlet port of the module and is driven during both the pumping and return strokes solely by the feed water under pressure. A spool valve controls the flow of feed water to and from the pump during the pumping and return strokes and also controls the flow of feed water and flush water to the module, as well as brine from the module. During the pumping stroke, a check valve in a flush water inlet conduit between the spool valve and the flush water inlet port prevents brine from exiting the module.

Abstract: An apparatus for rapidly refilling a dry wall cement dispensing tool from a dry wall cement-filled bucket containing a thick-walled, heavy, metal pump tube for submerging into the dry wall cement contained therein, all of a weight to provide the pump tube with a low center of gravity when set in the bucket of dry wall cement, a cement-moving piston attached to the pump rod for reciprocal motion inside the pump tube, a thin-walled, light weight transfer device lighter in weight than the pump tube, extending outward from the aperture top end of the pump tube and in hydraulic communication therewith including a nozzle device for conveying the cement from the heavy pump tube into the cement dispensing tool, and a thin-walled, light weight pneumatic rectilinear reciprocating device lighter in weight than the pump tube, mounted above the tube of a size easily balanced by hand, interconnected the pump rod and including an actuation valve, for sequentially and rapidly raising and lowering the piston in the heavy pump

Abstract: A downhole hydraulically operated pump having a power piston reciprocated by alternating pressurized hydraulic fluid flow controlled at the surface by a hydraulic power control system which quickly reverses the flow direction. The pump housing, suspended in the well fluid of a cased well by a discharge tube, has a power piston chamber in which the power piston is housed, a production piston chamber in which a production piston is housed, and an intermediate fluid and gas collection chamber disposed therebetween. The power piston, production piston, and a suction filter are connected by an elongate hollow tubular piston rod to reciprocate together and the piston rod interior is in communication with the discharge tube. On up strokes, a series of check valves direct well fluid upwardly through the suction filter, the piston rod interior, the production piston, the production piston chamber, the piston rod interior, and into the discharge tube.

Abstract: A pilot control relay valve to change the directional flow of fluid to a piston (such as, for example, the piston of a chemical injection pump for injecting chemicals at a slow or rapid rate over a long period of time), but also allow the recovery of exhaust fluids under significant back pressure. The pilot control relay valve comprises an elongated valve member shiftable within a valve body between a first and second position. The first position allows communication of control fluid to a first pressure receiving surface while allowing exhausting of fluid from a third or opposing pressure receiving surface, thereby to initiate movement of the valve member against the back pressure of the exhaust fluid from its first position to a position equalizing the pressure acting on a second pressure receiving surface with the pressure of the control fluid, thereby causing the valve member to move to its second position.

Abstract: The invention relates to a pump assembly comprising first and second pump units designed to be driven hydraulically, consisting of pump housing chambers, pump housing cylinders with pumping plungers mounted therein, and hydraulic cylinders with driving chambers which can be connected to a pressure source through a control valve for developing in the driving chambers a certain hydraulic pressure, which is used to operate the driving plungers.

Abstract: This invention relates to an accurate mechanical proportioning pump and/or mixing device that is adaptable for industrial, commercial and consumer use that incorporates a series of piston-seal-cylinder configuration with necessary check valves and seats that automatically proportionally pumps and/or mixes such fluids as soaps, fruit concentrates, food syrups, pesticides, herbicides, fungicides and fertilizers based on various other fluid driving mediums with a high degree of accuracy of controlled fluid to driving mediums.

Abstract: A high pressure fluid pumping transformer apparatus has a cylindrical transformer body surrounded by an outer pressure sleeve defining an annular working fluid chamber substantially surrounding the transformer body which receives fluid from an external source. The interior of the transformer body is divided into a central exhaust chamber and axially spaced working chambers at each end thereof. High pressure cylinders mounted in the transformer body at the end of each working chamber have a high pressure chamber spaced axially outward of the working chambers which contains a suction valve. Discharge valves mounted in the outer ends of the transformer body each contain a discharge valve and discharge port. An exhaust outlet extends from the exhaust chamber and is isolated from the working fluid chamber. A plunger reciprocally mounted in the transformer body has a portion which reciprocates in the working chambers and a reduced diameter at each end which reciprocates in the high pressure chambers.

Abstract: The present invention provides a self-powered proportioner which can automatically, proportionally mix two fluids in a low ratio. A fluid gating means is disposed intermediate a fluid supply and a motor piston to cause reciprocating movement of the motor piston within a motor cylinder. A connecting rod secured to the motor piston is disposed within a cavity in the housing extending between the motor cylinder and a slave pump cylinder. A slave pump piston is secured to the connecting rod for providing responsive reciprocatory movement of the slave pump piston within slave pump cylinder for pumping a second fluid. A connecting rod seal is interposed between the cavity wall and the connecting rod intermediate the motor cylinder and the slave pump cylinder preventing fluid communication through the cavity between the motor cylinder and the slave pump cylinder.

Abstract: A pump that is in essence leak-proof and prevents the escape to ambient atmosphere of environmentally hazardous fluent materials is comprised of an outlet block defining a pump chamber having a fluid inlet and a fluid outlet, a piston having one end reciprocable within the pump chamber and sealed to the outlet block, a piston rod connected to the other end of the piston for reciprocating the piston, a dynamic block secured to the outlet block and defining a sealed dynamic chamber within which the other end of the piston reciprocates, and an outlet from the dynamic chamber in continuous closed-circuit communication with a recirculating system for preventing escape into the environment of any fluent material that may leak past the piston seal. The pump also includes an articulated seal for sealing the piston rod to the dynamic chamber to maintain the sealed integrity of the chamber while at the same time accommodating reciprocation of the piston rod.