Abstract: A double acting concrete pump includes a pair of pump cylinders with a piston slidable back and forth in each cylinder, the pistons being driven in opposite directions, a connecting manifold connecting each of the cylinder outlets to a source of cement via separate pumping chambers, and a separate, removable discharge manifold for connecting the pumping chamber outlets to a delivery outlet. The discharge manifold has a discharge chamber with a pair of inlets connected to the respective pumping chamber outlets, and a single discharge outlet, with an outlet control valve in the discharge chamber for alternately isolating the flow from each of the pumping chambers to the discharge outlet in response to the pumping action.

Abstract: A high pressure reciprocating pump has a flange plate or mounting plate secured to the plunger end of a pump drive housing and a suction and discharge manifold is hingedly connected thereto. A stuffing box in bores in the flange plate has a central bore receiving one end of the plunger and forming a plunger pressure chamber coaxial with the plunger. A tapered packing assembly in the stuffing box surrounds the plunger in reciprocal sealing relation. A suction and discharge valve cartridge in one or more valve cavities in the manifold block is coaxial with the plunger. The hinged connection clamps the stuffing box in the flange plate for pivotal movement permitting clear access to the stuffing box and the valve cartridges whereby either may be removed as a unit for easy field maintenance. The valve cartridge comprises a common seat member with a suction valve and a discharge valve movably mounted thereon coaxial with the plunger and positioned concentric and radially spaced on the seat.

Abstract: A variable stroke positive displacement piston pump in which the effective eccentricity of the crankshaft controlling the stroke is adjustable by means of a worm/worm gear combination driving a hub to which eccentric rings are keyed.

Abstract: An injector device for a plunger-type pump of the type having one or more cylinders, an intake valve for each cylinder operatively disposed between the pump's low pressure inlet port and each of its cylinders and outlet valve(s) for each cylinder operatively disposed between the cylinders and the pump's high pressure outlet port, where the intake and outlet valves are held in place by removable threaded plugs which afford access to the valves so that they can be repaired or replaced. The injector device comprises a threaded plug member adapted to replace one of the removable plugs used to hold an intake valve in place, but also includes a longitudinal bore in which is mounted a one-way check valve. The inlet side of the check valve is adapted to be coupled to a chemical supply tank. Also, a restrictor is placed between the particular intake valve held in place by the injector plug and the pump's inlet port.

Abstract: A method and apparatus are disclosed for heat exchange between the plunger in a plunger pump and a supply of lubricant within the plunger pump. The plunger may be heated or cooled by circulating a lubricant through a reservoir formed in the plunger and back into the sump of the plunger pump.

Abstract: In a triple cylinder plunger pump, each of the plungers is respectively actuated by one of three disc cams which are respectively connected to a common driving shaft and to a plunger. The three cams are identical in size and in contour and are positioned about the driving shaft with a phase angle of 120.degree. therebetween. Each disc cam is formed to have a contour consisting of two portions for urging each plunger to perform both a reciprocal discharge stroke and a suction stroke. The two portions are each respectively designed with a positive acceleration range, a constant speed range and a negative acceleration range. The system is so balanced that the pressure drop of any one plunger due to its negative acceleration motion can be compensated by positive acceleration motion of the next subsequently reciprocating plunger, whereby the discharge pressure of the pump is maintained substantially constant and pulsation in the discharge volume and in the suction volume is kept to a minimum.

Abstract: A homogenizer comprises a homogenizing valve mounted to a pump block. Sets of three suction valves and discharge valves are positioned in valve bores in opposite faces of the block. Each of the valve bores has a hemispherical termination. The hemispherical termination of a pump chamber is formed in an adjacent surface of the block and is in communication with the valve bores through oblique conduits. The pump cylinder is formed in a packing box mounted in the block by bolts extending through the block. Integral valve assemblies removable as units are positioned in the valve bores. A pressure sensor is coupled to a discharge manifold through an isolating piston.

Abstract: A multi-lobe gradient cam for a high performance liquid chromatography pump for controlling proportions of HPLC solvents on the low pressure side of the pump. The gradient cam is non-concentric, and has an upward or draw gradient ridge over a majority of its circumference and a downward or thrust gradient over a minority of its circumference. In operation, the cam is designed to be used with two followers, located 180.degree. apart, which follow along the cam's gradient. The unique cut of the multi-lobe cam insures a constant suction on the inlet or suction side of the cam during the entire pump cycle.

Abstract: A dual cylinder hydraulically operated pump for viscous materials is described. The pump comprises a pair of pistons reciprocable in parallel cylinders opening into a common inlet and outlet housing in which the outlet valve seats are angled with respect to the principal cylinder axes and the inlet valve seat are angled with respect to the cylinder plane, that is the plane extending between the cylinder center lines.

Abstract: A high-pressure plunger pump which is designed for maximum pressures in the range between 1,000 and 4,000 bars includes a pump housing centered on an axis and including a main body having two axially spaced ends, and a pump head mounted on one of the ends of the main body. A plunger coaxially extends into the pump housing, and a sleeve is floatingly supported on the plunger. The sleeve has two end portions one of which is closer to the pump head than the other, converges toward the pump head and has an axial end face. Pressure and suction valves are coaxially arranged within the housing. The pump head includes a tube which forms a collecting container for a pressurized medium being pumped. This tube has a bore extending transversely of a longitudinal axis of the tube and around the axis of the housing and receiving a sleeve-shaped end portion of a pressure valve holder, and an external contact surface surrounding one end of the bore and engaging a corresponding sealing surface of the holder.

Abstract: A discharge valve retainer for a compressor with at least two arcuately-shaped, annular segments which segments are joined together. By joining the annular segments together, a retainer structure having a very rigid central portion results, thereby reducing stress and fatigue of the retainer. The discharge ports are arranged in an annular fashion and the suction ports are disposed radially inside the annularly arranged discharge ports.

Abstract: A reciprocating pump comprises a plurality of parallel connected cylinder plunger arrangements and is driven via a cam mechanism (10) by means of a rotary driving device. In order to insure a constant discharge, the cam mechanism (10) comprises in the case where three cylinder plunger arrangements are employed, three plate cams (14) fixed on a common shaft (13) so that they are spaced 120.degree. apart from each other, and the displacement curve (a1;a2;a3) of each plate cam is designed such that the sum of the displacement per unit angle of rotation in the accelerating section and the displacement per corresponding unit angle of rotation in the decelerating section is equal to the displacement per unit angle of rotation in the uniform velocity section.

Abstract: A pumped medium supplied to a suction chamber of the pump is first introduced under the action of the plunger into a working chamber of the plunger and then into a pressure chamber and a subsequent pressure line. The seats of a suction valve and of a discharge valve are arranged on a housing of a central valve, which can be inserted into a cylinder head through an opening formed in a cylinder head which can be closed by means of a base part. A piston-like element which is provided with intermediate seals between the base part and the central valve housing serves to secure the position of the central valve housing. The piston-like element is acted on at both its end faces, due to the provision of spacing chambers, by the pressure of the pumped medium in the pressure chamber. The seals are wedge-shaped so that they are increasingly urged radially outwardly against the cylinder head under axial loading.

Abstract: A pump which operates with several plungers is described with the plunger preferably being actuated via an eccentric drive unit and, having regard to the particular volume of flow per unit time, using several small plungers rather than a lesser number of comparatively large plungers, and accordingly operating with a large number of small volume displacements at a comparatively high speed of rotation. In this arrangement the suction chamber is centrally arranged in the pump body and the high pressure outlets of the pump chambers, which open into a common pressure chamber of ring-like construction, extend at least substantially in a radial direction.

Abstract: A reciprocating-type pump with simplified construction and enhanced performance is achieved by the use of a unitary, rigid pump body support structure and modular pump component designs. This unitary structure includes forward and rearward pump body mounting plates to which the pump body is secured, with the overall support structure being securely attached to the power frame of the pump by means of a power frame mounting plate. Rigid connecting members secure said plates together to form the unitary structure that is particularly advantageous for use in the fabrication of cryogenic pumps suitable for high pressure operation. Valve means, packing means and a pump body cooling jacket can be conveniently secured to the unitary support structure.

Abstract: A pump for forwarding liquids is described which has at least one pump chamber with inlet and outlet valves and also a plunger which periodically varies the volume of the pump chamber. To avoid the problems of dry running with very rapidly running pumps, and in order to overcome the resulting danger of destruction, the pump is arranged so that the closing force of at least one inlet valve of each pump chamber is controlled in dependence on the movement of the displacement member.

Abstract: A triplex or quadruplex pump having pump pistons which are equally phased apart and driven by a common drive shaft so that the velocity, i.e., speed with direction of all pistons in the particular pump is equal to zero at all times.

Abstract: An inline valve pump design is provided wherein the suction and the discharge valves operate along a central axis coincident and inline with a reciprocating plunger. The reciprocating plunger operates within a cylinder and a stuffing box which are independently secured by separate securing means to the drive housing of the pump. The cylinder thus secured by these independent securing means to the pump housing is also provided with an outer end having a large threaded portion to which a mounting adapter ring is secured. This ring in turn provides the mounted base to which further securing means, independent of the securing means holding the cylinder and stuffing box to the drive housing, are attached. These second or further securing means are effective to attach the suction and discharge manifold assemblies to the head of the cylinder, and in so doing capture the inline suction and discharge valve assembly to the cylinder head.

Abstract: Closure for openings in the housings or covers of piston pumps or the like to withstand an operating pressure which is in part an alternating load comprising an inner cover, a loadable and releasable pressure-applying member therefor, a loading device for the pressure-applying member, and for the purpose of satisfactorily meeting the requirements of practical operation without critically loading screw-threads, the loading device comprises a compression spring arranged between the pressure-applying member and a backing member, and a biassing device is provided for producing a releasing force acting in the direction opposite to that of the force of the compression spring to initially release the spring force on the pressure-applying member so that the backing member can be finally adjusted into a position to produce the desired compressive force in use.

Abstract: A helicopter transportable mud pump made into three stages, each of which is separable from one another. Each pump stage is made into a lightweight sub-assembly which can be lifted by a helicopter into inaccessible locations. The adjacent crankshaft ends of the assembled pump stages are series connected in axially aligned relationship respective to one another by a special coupling and drive means. The coupling means is comprised of two coacting coupling members, each of which have confronting faces connected together in a manner to dispose the adjacent shaft ends of the multi-stage pump 120.degree. out of phase respective to one another. The coupling halves are identical in design so that only one member must be duplicated during fabrication of the device.

Abstract: A multi-cylinder compressor 10 particularly useful in connection with northern climate heat pumps and in which different capacities are available in accordance with reversing motor 16 rotation is provided with an eccentric cam 38 on a crank pin 34 under a fraction of the connecting rods, and arranged for rotation upon the crank pin between opposite positions 180.degree. apart so that with cam rotation on the crank pin such that the crank throw is at its normal maximum value all pistons pump at full capacity, and with rotation of the crank shaft in the opposite direction the cam moves to a circumferential position on the crank pin such that the overall crank throw is zero. Pistons 24 whose connecting rods 30 ride on a crank pin 36 without a cam pump their normal rate with either crank rotational direction. Thus a small clearance volume is provided for any piston that moves when in either capacity mode of operation.

Abstract: A fabricated reciprocating piston pump having a power end frame characterized by spaced apart elongated precut steel plate members forming the frame sidewalls and forming bearing support members for supporting the jackshaft and eccentric shaft bearings. The shaft bearings are mounted in cylindrical sleeves which are supported by respective pairs of the frame plate members. The pump includes crossheads which are of rectangular cross-sectional shape having flat parallel bearing surfaces and which are supported in the frame by elongated crosshead slide plates which may be adjusted laterally and vertically to align the crossheads with the axis of reciprocation of the pump piston rods. The pump fluid end is made up of premachined cylindrical tube and bar stock sections which are welded together into a unitary assembly including the pump cylinders, the suction and discharge valve housing, and the suction and discharge fluid manifolds.

Abstract: A helicopter transportable mud pump made into three stages, each of which are separable from one another. Each pump stage is a light weight sub-assembly which can be lifted by a helicopter into inaccessible locations. The adjacent crankshaft ends of the assembled pump stages are series connected in axially aligned relationship respective to one another by a special coupling means. The coupling means is comprised of two coacting coupling members, each of which have confronting faces connected together in a manner that also causes the adjacent shaft ends of the multi-stage pump to be connected 120.degree. out of phase respective to one another. The coupling halves are identical in design so that only one member must be duplicated during fabrication of the device.

Abstract: The present invention involves improvements in reciprocable pumps. In one aspect, applicable to single action pumps, a quick release mounting means is provided for attaching a fluid end piece to a power frame. The frame has a tapered opening for receiving a barrel portion of the fluid end therein. A wedge device of mateable taper with the opening connects the barrel securely to the frame. The wedge extends around the transverse outer periphery of the barrel portion. Another aspect of the invention involves providing axially rotatable intake or exhaust manifolds. In a multiplex pump, the manifold may be rotatable as a unit, or the section for each conduit may be separately rotatable. This feature permits easier handling when making repairs, especially on larger pumps. Finally, in pumps having non-vertical suction or discharge passages, the valve counterbores are tilted toward a vertical direction, but not more than an angle at which straight-line machining of the suction or discharge passage is still possible.

Abstract: A high pressure plunger pump, in particular for forwarding water and water with additives, comprises a plurality of plungers 20 which are driven by a crankshaft journalled in a drive housing 10. The free ends of the plungers 20 are each guided in respective pump chambers 22 of an induction-discharge housing 12 which is connected to the drive housing 10. The induction-discharge housing 12 is a one piece housing of generally L-shaped cross-section. The pump chambers 22 are arranged in one limb of the L-shaped housing and communicate with an induction chamber 27 via spring biased inlet valves 27 provided in axial extensions of the pump chambers. A discharge chamber 31 extends through the other limb of the L-shaped housing and is fed from the pump chambers via outlet valves 29. Both the inlet and the outlet valves 25, 29 are secured in position by respective threaded plugs. The use of a one piece L-shaped housing brings a number of substantial benefits.

Abstract: A device for providing pulsation-free feeding of a liquid medium from a supply container to a consuming device for use in a road-marking machine is disclosed. Two statically-operating reciprocating-piston pumps are arranged between the supply container and the consuming device such that when one pump is on suction stroke, the other is on a feed stroke. The pump flow rate is proportional to the drive speed of the road-marking machine and the feed flow of each pump has zones which overlap the other. The feed sides of the pumps are connected to a change-over means which alternately connects delivery flows from the pumps to the consuming device and also connects the pressure side of the pumps simultaneously to the consuming device and to the supply container, which prevents pressure flow fluctuations as the back-pressure to each pump is the same.

Abstract: A pump (10) is disclosed for use in pumping a fluid (14) from a borehole (12) to the surface. The pump includes a first and second pumping string (20, 22) extending into the borehole and a return string (26) extending from the borehole. First and second pistons (82, 94) are slidably mounted at the ends of the first and second puming strings within the borehole, respectively for reciprocation between extended and retracted positions. First and second pumping cylinders (56, 64) are secured in fixed relation to the first and second pumping strings (20, 22) so that the first and second pistons (82, 94) are slidable therein. The pistons and pumping cylinders define first and second pumping chambers (92, 104). Each of the first and second pistons includes a gear rack (88, 100) having teeth meshing with the teeth on a stroke return gear (106).

Abstract: The cryogenic reciprocating pump includes a pump body having a cylindrical pumping chamber extending from the forward end of the pump body to the pump body rearward end. A piston is reciprocated in the pumping chamber under the control of a piston rod extending from the pumping chamber. A packing assembly surrounds the piston rod and is coupled through an intermediate section to the rearward end of the pump body. The intermediate section comprises a tubular shell of low thermal conductivity material and a corrugated metal expansion member. The packing assembly is affixed to a support member connected to the pump body at the forward end thereof.

Abstract: A suction manifold unit for mounting on a pump fluid end in association with at least one further suction manifold unit to provide a suction manifold assembly for supplying fluid to suction cylinders of such a pump fluid end. The manifold unit has at least one supply duct leading to its interior, and outlet duct for leading fluid from the supply duct to a suction cylinder during use, and a supply conduit sealingly associated with the supply duct, the supply conduit being adjustable between a retracted position where it will be spaced from another manifold unit mounted relatively to such a pump fluid end, and an extended position for engaging sealingly with a corresponding supply duct of such a further manifold unit to place the manifold units in communication with each other.

Abstract: Multi-cylinder in-line and radial pumps having an improved structure for coupling the piston heads to the crankshaft such that the number of parts commonly employed and the size of the resulting pump is greatly reduced when compared to prior art pumps now on the market. Both in-line piston pumps and radial diaphragm pumps are included. The connecting rods comprise plates, each having a bore through the thickness dimension thereof for receiving a cylindrical lobe formed eccentrically on the pump's crankshaft. Formed on one end of each of the connecting rods is a generally cylindrical bore, also extending through the thickness dimension of the connecting rod, the center of this bore being displaced inwardly of the end edge surface of the connecting rod by a distance which is less than the radius of the bore.

Abstract: An easy-to-assemble compressor having a pair of parallel, double-headed pistons reciprocably mounted in respective cylinder chambers in a compressor housing. The pistons are mounted on a crankshaft via Scotch-yoke-type sliders slidably engaged in the respective pistons for reciprocating movement in a direction normal to the piston axis. The sliders convert the rotation of the crankshaft into linear reciprocation of the pistons. The dimensions of these sliders are determined in relation to the other parts of the compressor so that, during the assemblage of the compressor, the sliders may be mounted in position by being passed over the opposite end portions of the crankshaft following the mounting of the pistons and crankshaft within the housing.

Abstract: An improved slipper is disclosed for a fluid pressure pump of the radial piston type for operably connecting a piston to a cam lobe on a crankshaft. The slipper includes an inner arcuate side surface for engagement with the cam lobe on the crankshaft and an opening through the slipper body to permit centrifugal flow of fluid for piston filling. The opposite side of the slipper body includes a recess for retaining a hardened annular seat inert. The spherical head of the piston rides on the inner circumference or edge of the insert, and the sharp edge of the insert provides a wiping action on the piston head as relative motion occurs between the piston and slipper. Further, an open area is provided on both sides of the line of contact between the piston and slipper to prevent contaminants from entering between the contacting surfaces which would spoil the seat.

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 piston pumping system is disclosed having a pair of piston pumps operated by plungers with roller follows which ride in rotary cam plate grooves. The grooves are arranged such that the delivery of each pump overlaps the suction of the other pump. Means are provided to sense any pulsations in pressure to change the cam speed during the precompression phase of operation and means are provided to sense delivery pressure and to adjust cam plate speed during the interval between the initial phase of delivery and the end of the precompression stroke.

Abstract: A method of converting steam pressure from a boiler into a constant pressure hydraulic fluid working media and system for efficiently utilizing the hydraulically stored energy in a land vehicle or the like. A reciprocating steam piston actuates one or more hydraulic pistons in cylinders without going through a crankshaft or other rotating parts. A means of recuperating kinetic energy from a decelerating vehicle and storing it as pressurized working fluid is provided.

Abstract: A pump and engine assembly according to the present invention is adapted for skid mounting and incorporates a pair of engines positioned in side to side relationship and having rotary output shafts thereof positioned in substantially parallel relation. A pair of piston type pumps are also positioned in side by side relationship with the fluid ends thereof facing in the same direction and with pump drive shafts arranged in substantially parallel relation with the rotary output shafts of the engines. The pump housing of a first one of the pumps incorporates a pair of shaft receptacles receiving a pair of rotary drive shafts. One of the drive shafts is provided with a pinion gear having meshing gear engagement with the primary gear of the first pump while the second drive shaft extends from opposed sides of the first pump. The second pump is provided with a drive shaft that is adapted to be coupled to the second drive shaft of the first pump.

Abstract: A power-assisted valve is provided which is particularly effective for systems handling viscous materials, such as certain metering systems. The check valve operates effectively even with highly-filled viscous resins used in such systems. The valve includes a valve seat and a valve ball which can be urged toward the valve seat to a closed position by a fluid-powered cylinder and piston. The piston rod is separate from the valve ball so that the ball can rotate relative to the valve seat.

Abstract: A machine manifold or body having fluid passages defined by relatively thin stainless-steel or other corrosion resistant tubular components embedded within a relatively thick molded plastics casing which serves to give the components strength to withstand the fluid pressures in the passages, and to permit a minimum of the expensive corrosion resistant material to be used. The passages may be formed by different tubular components located and preferably sealed together, or could be constituted by a single lost-wax casting of stainless-steel. Conveniently there is a rubbery layer between the thin metal passage defining components and the surrounding molded plastics casing.

Abstract: An adjustable expansible chamber pump for liquids is disclosed, which is resistant to corrosion and which preferably utilizes a compressible bellows of synthetic plastic material, which is compact, which has improved expansible chamber actuating mechanism comprising an adjustable eccentric driving member to vary the stroke to adjust the quantity of liquid delivered, the adjustment of the eccentric being easily accomplished and the setting being visible and approaching linearity and adapted for delivery of small quantities of a specific component, the pump being readily employed with similar pumps for simultaneous or staggered pumping of a plurality of liquids for mixing and which can utilize a single driving motor.

Abstract: A high pressure fluid delivery system including an improved reciprocating pump is disclosed. The pump has a fluid cylinder block, with a stuffing box mounted on one side and a suction manifold on the other. A cylindrical passage extends into the fluid cylinder block from the stuffing box side of the block to receive a plunger which is mounted in the stuffing box. A cylindrical chamber, coaxial with the passage, extends from the passage to the suction manifold side of the fluid cylinder block. In the suction manifold, a suction port leads to the cylindrical chamber of the fluid cylinder block.The cylindrical chamber holds a suction valve, with a valve seat and a valve guide. A discharge valve and valve seat are provided in a cylindrical opening extending from the chamber to an outer wall of the fluid cylinder block. A plug or cover in the cylindrical opening holds the discharge valve elements in place and serves as a guide for the discharge valve.

Abstract: A multiple fluid pump for providing multiple output fluid streams at varying pressures with high pressure reciprocating plungers of the pump having equal intervals between their compression strokes to minimize vibrations and shocks in the high pressure output fluid stream and low pressure reciprocating plungers of the pump having their compression strokes intermediate to the high pressure compression strokes.

Abstract: In a device such as a refrigerant compressor provided with a reciprocating piston having a stroke length which can be changed from one value to another in accordance with the direction of rotation of the crankshaft driving a connecting rod, there is provided an arrangement in which the top deadcenter position of the piston can be maintained irrespective of the changes in stroke length by an eccentric ring which has limited rotation on the crankshaft crankpin, and a second eccentric ring encompassing the first eccentric ring and which has limited rotation relative to the encompassing strap end of the connecting rod. With this arrangement, both the throw of the crankpin means and the effective length of the connecting rod are generally concurrently changed inversely when the crankshaft rotates in one direction or alternatively in the other direction.

Abstract: A multi-cylinder pump for delivering fluids under high pressure which includes a multi-lobed camshaft having bearing supported yoke elements disposed in an oil-filled crankcase for coupling the camshaft to plural piston elements such that displacement of the plural piston elements occur in a desired phase relationship and improved sealing arrangements disposed between the piston and the cylinders, between the suction inlet port and the high pressure outlet port and between the cylinders and the oil-filled crankcase to prevent cross-contamination of the oil lubricant and the fluid being pumped and to prevent any substantial leakage between the high pressure outlet port and low pressure inlet port during the suction and pressure strokes of the pistons.

Abstract: A reciprocating plunger pump particularly adapted for the pumping of liquids has at least one pumping chamber and a plunger disposed for reciprocating movement therein, a common substantially integral inlet manifold for fluid to be pumped, a common integral outlet manifold for pumped fluid, and a valve assembly operatively associated and aligned with the pumping chamber and connected to the inlet manifold to receive the fluid to be pumped and to deliver the fluid to the pumping chamber, and operatively connected to the outlet manifold to pass the pumped fluid thereto. The valve assembly has cylindrical pressure containing parts including, a lower section, an intermediate section, and an upper section with a discharge passage extending end to end therethrough in the longitudinal axis of and in communication with the pumping chamber in the assembled position of the valve assembly.

Abstract: A fuel pumping apparatus includes a housing in which is located a plurality of reciprocable tappet assemblies including tappet bodies. The tappets carry rollers for engagement with cams respectively. In order to prevent rotation of the tappet bodies adjacent pairs of the tappet bodies are provided with mutually facing and mutually inclined flats which are engaged by wedge-shaped guide members. The flats and guide members permit reciprocable movement of the tappet bodies but prevent rotation thereof.

Abstract: A multi-cylinder reciprocating piston internal combustion engine with the cylinders thereof arranged in series in a plurality of rows, which includes a crank shaft with Z-shaped lift pin having rotatably journaled thereon a universal joint. The universal joint includes an outer part with journal pins and an inner part journaled in the outer part and including a hollow shaft having its longitudinal axis extending perpendicular to the axes of the journal pins. The outer part of the universal joint is non-rotatably connected to a double arm rocker having pistons connected thereto through the intervention of connecting rods. The outer part of the universal joint which is journaled in the engine housing extends around the lifting pin in a box or bowl-shaped manner. For each lifting pin, two diametrically arranged double arm rockers, with two pistons each are provided.

Abstract: A multi-cylinder pump for delivering fluids under high pressure which includes a multi-lobed camshaft having bearing supported yoke elements disposed in an oil-filled crankcase for coupling the camshaft to plural piston elements such that displacement of the plural piston elements occur in a desired phase relationship and improved sealing arrangements disposed between the piston and the cylinders, between the suction inlet port and the high pressure outlet port and between the cylinders and the oil-filled crankcase to prevent cross-contamination of the oil lubricant and the fluid being pumped and to prevent any substantial leakage between the high pressure outlet port and low pressure inlet port during the suction and pressure strokes of the pistons.

Abstract: One or a plurality of positive displacement slurry pumps are connected to common intake and discharge manifolds at a typical slurry pipeline pumping station. Each pump is connected at its inlet by inlet piping from the intake manifold through an intake isolation valve with a flushing water inlet between the intake isolation valve and the pump. Similarly, each pump is connected at its outlet by outlet piping to the outlet manifold through an outlet isolation valve with a pump drain between the outlet isolation valve and the pump. Conventional pulsation dampeners are connected to the piping at least at the pump outlet and communicate a volume of gas under pressure to the pump for dampening of shock waves. The inlet and outlet piping has a pipe length and slope between the pump on the high side to the station intake manifold and to the discharge manifold on the low side.

Abstract: A plunger pump includes a pump housing and a plunger extending into a pumping chamber of the pump housing. A sleeve valve is mounted only on the plunger for reciprocation therewith and also for displacement longitudinally of the plunger and subdivides the pumping chamber, when in its closed position, into a suction space without, and pressure space within, the sleeve valve. An inlet communicates with the suction space, and an outlet with the pressure space, the latter having a one-way valve therein which opens during the pumping stroke of the plunger. A flexible diaphragm ring extends across a spacing between the pump housing and the sleeve valve and is sealingly connected to these components. The diaphragm ring is flexible and urges the sleeve valve toward its closed position. A liquid seal may be accommodated in a compartment separated from the suction space by the diaphragm ring.

Abstract: Apparatus is provided for moving controlled quantities of a material from one location to another and increasing the pressure thereof. The apparatus includes at least two cylinders having rams reciprocable therein. The rams are driven by a rocker arm which is pivotally connected to outer ends of both rams and is pivotally supported at a position therebetween. The arm is driven through a fluid-operated cylinder having a piston rod connected to one end of the arm, thereby reciprocating the rams in opposite directions. The ram cylinders have inlets connected to a source of the material under low positive pressure with a ball check valve located between the source and each inlet. Outlets of these cylinders are connected to a common outlet with a ball check valve also located between the common outlet and each cylinder outlet.