Abstract: A well service pump system supplies high pressure working fluid to a well. The pump system is a linear design which incorporates an electric motor, a variable frequency drive (VFD), a pump drive, closed loop variable flow rate hydraulic pumps, hydraulic ram cylinders, working fluid end cylinders, and a coupling to connect the hydraulic ram cylinders and the working fluid end cylinders. The electric motor powers the hydraulic system which, in turn, provides hydraulic fluid to operate the hydraulic ram cylinders. The VFD is connected to a single one of the hydraulic pumps at a time and applies power to the connected pump, via the pump drive, to drive the connected pump from a cold start to an operating speed. The VFD is connected sequentially, one pump at a time, to each of the hydraulic pumps and disconnected from each pump once the pump reaches the operating speed. Once the pump reaches operating speed, the pump is connected to receive power directly to the electric motor.

Abstract: A hose for a reciprocating pump, the hose comprising: a first end and a second end separated by a length (L) along a centerline of the hose, wherein the first end reciprocates with a reciprocating element of the reciprocating pump during operation of the reciprocating pump; an inner surface and an outer surface separated by a thickness; and a variable bend radius wherein a bend radius of a first section of the hose is different from a bend radius of at least one second section of the hose, such that, during operation of the reciprocating pump, a stress on the first end of the hose, the second end of the hose, or both the first end of the hose and the second end of the hose is reduced relative to that of a hose that does not contain the variable bend radius.

Abstract: A portable hydraulic power unit includes a frame, a fluid tank supported by the frame, and a manifold supported by the frame. The fluid tank is configured to store a supply of hydraulic fluid for powering a hydraulically-driven tool. A reciprocating pump is mounted on the exterior of the fluid tank and on the exterior of the manifold. The reciprocating pump is secured to the fluid tank and the manifold with fasteners extending through a cylinder body of the reciprocating pump.

Abstract: A bending meshing type gear device includes an internal gear, an external gear which meshes with the internal gear, a wave generator which bends and deforms the external gear, and a wave generator bearing which is disposed between the wave generator and the external gear, in which the wave generator bearing has a rolling body and an outer ring, and a minimum inner peripheral length of the external gear is larger than a maximum outer peripheral length of the outer ring.

Abstract: A packing system for a pump includes a packing stack comprising a packing, wherein the packing is cylindrical and compressible such that the packing can fill a void volume in a reciprocating element bore of the pump; one or more springs; and a terminal component configured for sealing a terminus of the reciprocating element bore, wherein the one or more springs are positioned between the terminal component and the packing to provide a force on the packing that maintains compression of the packing within the void volume.

Abstract: Bleed valve having a longitudinal axis, the bleed valve having an operative configuration wherein the longitudinal axis extends in a vertical direction, the bleed valve comprising a one-way valve, an intermediate duct, a support and a cap which are in a vertical alignment from bottom to top of the bleed valve when the bleed valve is in its operative configuration, wherein the one-way valve is adapted to put, when it assumes an open configuration, a lower through hole in communication with the intermediate duct, wherein the support is coupled to the cap so as to form a cavity in which a ball is housed, the cap being provided with a main aperture communicating with outside of the bleed valve, said cavity being adapted to let the ball move between a lower limit position, that the ball assumes when subject only to gravity and the bleed valve is in its operative configuration and wherein the support supports the ball, and an upper limit position in which the ball occludes the main aperture, the bleed valve being c

Abstract: A well service pump system supplies high pressure working fluid to a well. The pump system is a linear design which incorporates a diesel engine, a hydraulic drive gear box, open loop hydraulic Pumps, hydraulic ram cylinders, controls for the hydraulic system hydraulic cylinders, working fluid end cylinders and a coupling to connect the hydraulic cylinders and the working fluid ends. The engine powers the hydraulic system which, in turn, provides hydraulic fluid to operate the hydraulic ram cylinders. Each of the polished rods of the hydraulic ram cylinders is connected axially to a plunger rod end of a working fluid end cylinder. There is no crankshaft or automatic transmission required. The linear design allows for a longer plunger stroke length while still allowing highway transport on a truck or skid.

Abstract: A grinder for beans of plant-based products, for example roasted coffee beans, includes a grinding chamber defined by a cylindrical wall and a pair of opposed grinding wheels located in the grinding chamber. At least one of the pair of opposed grinding wheels rotates. The grinder further includes an electric motor for driving the rotating grinding wheel and a first cooling duct extending in the cylindrical wall between a first inlet and a first outlet. A tubular circuit connected to the first cooling duct includes a pump for circulating fluid, a heat dissipater, at least one valve member, and an electronic control unit for actuating the pump and for turning on the heat dissipater according to a temperature sensed by a temperature sensor.

Abstract: A connecting rod for a variable compression internal combustion engine, the connecting rod comprising: at least one hydraulic chamber configured in a connecting rod body, wherein the at least one hydraulic chamber is connectable by a check valve with a bearing shell of the connecting rod or with a tank, wherein the check valve includes a closure element and a valve seat, wherein the closure element contacts the valve seat in a blocking position of the closure element and blocks a fluid path, and wherein the closure element is arranged in a bore hole of the connecting rod body and the valve seat is introduced into the connecting rod body.

Abstract: A fluid end of a high-pressure pump having a power end bore, a discharge bore, a suction bore, an access bore, and a cross-bore intersection formed in portions of the fluid end is provided. A transitional open area opens into the cross-bore intersection from the power end bore; a transitional open area opens into the cross-bore intersection from the access bore; a transitional open area opens into the cross-bore intersection from the suction bore; and a transitional open area opens into the cross-bore intersection from the discharge bore. A spherical geometry is created in the cross-bore intersection. A spherical surface forms an outer boundary of the cross-bore intersection.

Abstract: The pump includes a piston slidably mounted in a metering chamber, the piston including a support, a diaphragm made of a first material and forming a check valve that allows fluid to flow into the metering chamber, and a presser element for pressing the diaphragm against the support, the presser element including a skirt carrying seal enabling the piston to slide in leaktight manner in the metering chamber, the presser element being made of a second material different from the first material of the diaphragm, being fitted against the diaphragm, and having a diaphragm presser surface that holds the diaphragm deformed against the support in order to close the check valve.

Abstract: Tapered valve guide and spring retainer assemblies are described for use in plunger pump housings that incorporate corresponding outwardly flared discharge and suction bores, as well as structural features for stress-relief. Plunger pumps so constructed are relatively resistant to fatigue failure because of stress reductions, and they may incorporate a variety of valve styles, including top and lower stem-guided valves and crow-foot-guided valves, in easily-maintained configurations. Besides forming a part of valve guide and spring retainer assemblies, side spacers may be shaped and dimensioned to improve volumetric efficiency of the pumps in which they are used.

Abstract: A common seat portion includes discharge passages that communicate between a first valve chamber and a second valve chamber when a discharge valve member is lifted away from the common seat portion. The common seat portion also includes a relief passage that extends substantially parallel to the discharge passages and communicates between the first valve chamber and the second valve chamber when a relief valve member is lifted away from the common seat portion.

Abstract: An apparatus for constructing a high pressure fluid pump having a piston housing, a pump head connected to and supported by the piston housing, and a pump pedestal for supporting the pump head and the piston housing is provided. The pump head receives water at low pressure and, in combination with the piston housing, produces fluid through a flow channel at high pressure. The combination of piston housing and pump head contains a valve which, in response to a suction on one side of the valve, allows water at low pressure to pass through the valve into a receiving chamber, and, in response to a high pressure fluid in the receiving chamber, enables fluid at a high pressure to pass through the valve and eventually to an output port while closing off the input path. The pump can have an aluminum pump head structured to withstand high pressure fluid impact.

Abstract: A pump has a PVC “T” shaped member having an inlet, an outlet and an interior pumping chamber positioned between the inlet and outlet; a piston displaceable into the chamber; an air cylinder for driving the piston into the chamber; a spring for biasing the piston outwardly from the chamber in opposition to force applied by the air cylinder; a washer-urethane disk check valve at the conduit inlet permitting fluid flow into the chamber but precluding fluid flow out of the chamber responsively to piston displacement into the chamber; and a washer-urethane disk check valve at the conduit outlet permitting fluid flow out of the chamber responsively to fluid pressure increase resulting from piston displacement into the chamber.

Abstract: Plunger pump fluid ends incorporate housings with structural features that facilitate manufacture while providing improved internal access, reduced weight, and reduced likelihood of fatigue failures compared to conventional fluid end housings. Certain fluid ends incorporate frangible pressure relief means in suction valves for protection from overpressure-induced catastrophic failure. Oblong bore transition areas, when present, and barrel-profile central cavities provide obtuse bore intersection angles and effectively reduce fluid end weight while reducing peak cyclic fluid end housing stress by redistributing stress within the fluid end housing.

Abstract: A check valve construction is provided in which a moveable a movable ball having a convex surface resides in a cage having a conical frustum chamber and a seat for the ball. A fluid path between the ball and the cage is defined by the equation: G = D ? ? cos ? ( b - a ) 2 ? ? cos ? ? b - d 2 wherein G is the gap of the narrowest passageway of the fluid path, D is the diameter of the small end of the conical frustum chamber of the cage, d is the diameter of the convex surface of the ball, a is the angle between a vertical diameter of the ball and the position of the narrowest gap on the convex surface of the ball, and, b is the angle between the vertical diameter of the movable element and the position of the small end of conical frustum chamber of the cage.

Abstract: A reciprocating pump assembly has a pump within a housing. The pump has a crankshaft that rotates and a crosshead that is connected to a plunger via a pony rod. The plunger pumps fluid through cylinders in the pump. A connecting rod connects at one end to the crankshaft and at another end to the crosshead to translate the crankshaft's rotational movement into linear movement of the crosshead and thereby the plunger. The end connected to the crosshead is secured to the crosshead by a bushing located within the crosshead that allows the connecting rod end to pivot during operation. The bushing extends more than 180 degrees, retaining the connecting rod with the crosshead without the need for a wrist pin. The end secured by the bushing can be retained within the bushing by a lock plate, and retainers without the need for a wrist pin.

Abstract: Disclosed is a sludge suction apparatus for an offshore structure. The sludge suction apparatus includes a housing having an upper mounting hole and a lower mounting hole; a suction valve installed in the lower mounting hole in line with a suction hole to selectively suck sludge according to variation of internal pressure of the housing; an exhaust valve installed in the upper mounting hole to communicate with the exhaust hole and aligned coaxially with the suction valve to exhaust the sludge to an outside through the exhaust hole; a valve port coupled to an upper portion of the upper mounting hole and formed with a fixing groove coupled with an upper portion of the exhaust valve; and a piston assembly fixedly coupled with the coupling section and reciprocated in forward and rearward directions to operate the suction valve and the exhaust valve.

Abstract: A fluid section for a reciprocating pump comprises a cylinder assembly including a housing having a central axis, a first end, a second end opposite the first end, and a throughbore extending axially between the first end and the second end. In addition, the cylinder assembly includes a liner disposed within the throughbore of the housing. Further, the cylinder assembly includes an end cap coupled to the second end of the housing. Still further, the cylinder assembly includes an annulus radially positioned between the liner and the housing, the annulus being in fluid communication with the throughbore of the liner. Moreover, the fluid section includes a piston slidingly disposed in the throughbore of the liner. The piston is adapted to compress a fluid disposed in a pumping chamber within the liner extending axially through the throughbore of the liner between the piston and the first end of the housing.

Abstract: A pump assembly with valve-seat interface architecture configured to extend the life of pump components and the assembly. A valve of the pump assembly is equipped with a conformable valve insert that is configured with a circumferential component having the capacity to reduce the radial strain of its own deformation upon its striking of a valve seat at the interface within the pump assembly. The circumferential component may include a concave surface about the insert, a rounded abutment at the strike surface of the insert, or a core mechanism within the insert that is of greater energy absorbing character than surrounding material of the insert. Additionally, the valve seat itself may be configured for more even wear over time and equipped with a conformable seat insert to reduce wear on the valve insert.

Abstract: Tapered valve guide and spring retainer assemblies are described for use in plunger pump housings that incorporate corresponding outwardly flared discharge and suction bores, as well as structural features for stress-relief. Plunger pumps so constructed are relatively resistant to fatigue failure because of stress reductions, and they may incorporate a variety of valve styles, including top and lower stem-guided valves and crow-foot-guided valves, in easily-maintained configurations. Besides forming a part of valve guide and spring retainer assemblies, side spacers may be shaped and dimensioned to improve volumetric efficiency of the pumps in which they are used.

Abstract: A pressure washer pump generally includes a pump housing that defines a cavity, an opening into the cavity and a bottom of the cavity generally opposite the opening. A valve assembly is disposed in the cavity through the opening. The valve assembly includes a cage member that contains a first valve mechanism. A plug member is received in the opening to fluidly seal the cavity of the pump housing. A compliant member is disposed between the plug member and the cage member. The cage member is disposed between the compliant member and the bottom of the cavity and spaced from the plug member.

Abstract: A suction valve for a reciprocating compressor includes a hollow cylindrical valve seat having a plurality of suction ports formed therethrough. The suction ports are covered by flaps moveably mounted on the inner surface of the valve seat which open and close in response to pressure differentials in the compressor. The flaps are oriented in a consistent circumferential direction so as to induce a vortex effect in gas moving through the suction ports.

Abstract: A fuel pump includes a pump housing having a compression chamber. A plunger is axially movable in the pump housing for pressurizing fuel in the compression chamber. A discharge valve is configured to open to supply fuel from the compression chamber to an internal combustion engine when pressure in the compression chamber is more than predetermined pressure. A fuel passage is configured to communicate a downstream of the discharge valve with an upstream of the discharge valve. An in-passage member is accommodated in the fuel passage. The in-passage member includes multiple members, which are combined to define a throttle portion for restricting fuel, which returns from the downstream of the discharge valve to the upstream of the discharge valve.

Abstract: Embodiments of the invention provide a double action simplex pump including a pump body with a first half and a second half joined together to form an enclosed cavity. The first half includes a first pipe member and the second half includes a second pipe member. A first end of the first pipe member is a fluid inlet port and a second end of the second pipe member is a fluid outlet port. The enclosed cavity defines a first pocket and a second pocket each in fluid communication with a first lumen of the first pipe member and a second lumen of the second pipe member. A first valve assembly is positioned in the first pocket and a second valve assembly is positioned in the second pocket. Each of the first valve assembly and the second valve assembly includes a valve casing supporting an inlet poppet valve, an outlet poppet valve, and a central opening located between the inlet poppet valve and the outlet poppet valve. The central opening is aligned with one of a plunger and a diaphragm.

Abstract: Disclosed is a sludge suction apparatus for an offshore structure. The sludge suction apparatus includes a housing having an upper mounting hole and a lower mounting hole; a suction valve installed in the lower mounting hole in line with a suction hole to selectively suck sludge according to variation of internal pressure of the housing; an exhaust valve installed in the upper mounting hole to communicate with the exhaust hole and aligned coaxially with the suction valve to exhaust the sludge to an outside through the exhaust hole; a valve port coupled to an upper portion of the upper mounting hole and formed with a fixing groove coupled with an upper portion of the exhaust valve; and a piston assembly fixedly coupled with the coupling section and reciprocated in forward and rearward directions to operate the suction valve and the exhaust valve.

Abstract: Embodiments of the invention provide a double action simplex pump including a pump body with a first half and a second half joined together to form an enclosed cavity. The first half includes a first pipe member and the second half includes a second pipe member. A first end of the first pipe member is a fluid inlet port and a second end of the second pipe member is a fluid outlet port. The enclosed cavity defines a first pocket and a second pocket each in fluid communication with a first lumen of the first pipe member and a second lumen of the second pipe member. A first valve assembly is positioned in the first pocket and a second valve assembly is positioned in the second pocket. Each of the first valve assembly and the second valve assembly includes a valve casing supporting an inlet poppet valve, an outlet poppet valve, and a central opening located between the inlet poppet valve and the outlet poppet valve. The central opening is aligned with one of a plunger and a diaphragm.

Abstract: A double-acting, simplex, fluid handling pump is designed to facilitate an optional configuration as either a plunger pump or a diaphragm pump. An injection molded plastic pump body comprises two bilaterally symmetrical halves that include internal pockets and grooves for clamping and retaining first and second generally identical valve assemblies at opposing end portions of the pump body. When configured as a plunger pump, first and second plunger are arranged to move 180 degrees out-of-phase with respect to one another within stationary guide sleeves that are clamped within the pump body where one plunger effecting a suction stroke while the other effects a compression stroke. When configured as a diaphragm pump, the plungers are removed from the connecting rods and replaced by diaphragms and a change is made in the valve casing employed but a majority of the remaining parts of the pump assembly remain unchanged from what is used in the plunger pump.

Abstract: A radial piston pump (1) for supplying fuel at high-pressure to an internal combustion engine has a displacement housing (3) equipped with a compression chamber (4), a reciprocating piston which is arranged in a cylinder chamber (5) of a cylinder (30), a suction valve (10) which is connected to a fuel supply line (8) and a pressure valve (12) which is connected to a fuel outlet line (14). The suction valve (10) and the pressure valve (12) have, respectively, a closing head (16, 16?), a valve seat (18, 18?), a cylinder section (20, 20?) and springs (22, 22?). The suction valve (10) and the pressure valve (12) are identical components and the pressure valve (12) is incorporated into the radial piston pump (1) in the direction of flow counter to the suction valve (10).

Abstract: A reciprocating piston/plunger pump inlet manifold includes an elongated cylindrical manifold member closable at opposite ends by transverse end caps connected to the manifold member by releasable couplings. A rubber or polymer liner formed with nitrogen filled closed cells is disposed within the manifold member. Spaced apart fluid discharge guide and mixing tubes are connected to the manifold member and include flanges for securing the manifold to inlet valve housings of a pump. The fluid flow guide and mixing tubes include partitions and a mixing chamber portion of the tubes. Improved fluid flow characteristics with minimal solids separation and minimal fluid velocity or acceleration induced pressure losses are exhibited by the manifold.

Abstract: Tapered valve guide and spring retainer assemblies are described for use in plunger pump housings that incorporate corresponding outwardly flared discharge and suction bores, as well as structural features for stress-relief. Plunger pumps so constructed are relatively resistant to fatigue failure because of stress reductions, and they may incorporate a variety of valve styles, including top and lower stem-guided valves and crow-foot-guided valves, in easily-maintained configurations. Besides forming a part of valve guide and spring retainer assemblies, side spacers may be shaped and dimensioned to improve volumetric efficiency of the pumps in which they are used.

Abstract: A homogeniser (1) for the continuous treatment of fluids at very high pressure comprises at least one reciprocating plunger (5) in a compression chamber (6) and a guide chamber (11) from a fluid intake position to a delivery position. Said compression chamber (6) opens into a manifold (27), inside a block (26) from which a delivery pipe (32) and an intake pipe (31) branch off. A first seal unit (21) is housed in the guide chamber (11), a second seal unit (24) is located close to the intersection between the compression chamber (6) and the guide chamber (11) and a third seal unit (35) is positioned upstream and downstream of each valve (28, 29) and the intersection between the manifold (27) and the compression chamber (6).

Abstract: A device for conveying a mixture of substances including at least one mixture component predominantly having a viscous consistency and at least one mixture component predominantly having a solid, particle-like consistency, includes a delivery cylinder having perforations over a portion of a lateral wall thereof and configured to separate, through the perforations, at least one of the mixture components from the mixture of substances. The delivery cylinder is connected, via a pipeline provided on an outside of the perforated lateral cylinder wall, to a processing station for the separated at least one mixture component. A material feed space is connected to an inlet side of the delivery cylinder. A delivery line is connected to an outlet side of the delivery cylinder. A delivery piston is reciprocatable through the material feed space and the delivery cylinder.

Abstract: A cylinder block assembly for a reciprocating pump includes a block body having a piston chamber that receives a piston of the reciprocating pump. The cylinder block assembly has an outlet valve assembly positioned within the block body that is positioned in fluid communication with the piston chamber. An outlet valve retainer retains the outlet valve relative to the piston chamber. The cylinder block assembly includes an inlet valve assembly extending through a side of the block body to the piston chamber. An inlet valve retainer also retains the inlet valve assembly relative to the piston chamber. A discharge passage extends from the outlet valve assembly to another side of the block body. A portion of the discharge passage extends between the inlet valve assembly and the inlet valve retainer.

Abstract: A double-acting, simplex, fluid handling pump is designed to facilitate an optional configuration as either a plunger pump or a diaphragm pump. An injection molded plastic pump body comprises two bilaterally symmetrical halves that include internal pockets and grooves for clamping and retaining first and second generally identical valve assemblies at opposing end portions of the pump body. When configured as a plunger pump, first and second plunger are arranged to move 180° out-of-phase with respect to one another within stationary guide sleeves that are clamped within the pump body where one plunger effecting a suction stroke while the other effects a compression stroke. When configured as a diaphragm pump, the plungers are removed from the connecting rods and replaced by diaphragms and a change is made in the valve casing employed but a majority of the remaining parts of the pump assembly remain unchanged from what is used in the plunger pump.

Abstract: A pump comprising a piston in communication with a valve chamber provided with a first valve seat and a second valve seat, and a resilient valve element comprising a first tapered portion, a second tapered portion and a flange portion extending from a periphery of the first tapered portion, in which the flange portion co-operates with the first valve seat to form an inlet valve, and the second tapered portion co-operates with the second valve seat to form an outlet valve, and in which negative pressure applied to the flange portion by the pressure means in use lifts it from the first valve seat, and positive pressure applied to the first tapered portion by the piston in use lifts the second tapered portion from the second valve seat.

Abstract: A reciprocating pump assembly has a pump housing with a crankshaft. A plunger is connected to the crankshaft for pumping a fluid through a cylinder. The cylinder has a fluid inlet port and an opening that provides access to the cylinder. A suction cover is mounted in the opening and has a hub that is coaxial with an axis of the suction cover. A suction valve stop is mounted adjacent one of the fluid ports and has a spring retainer. A column extends from the spring retainer, and a bushing is mounted to the spring retainer for engaging and being retained by the hub of the suction cover. The suction cover guides the suction valve stop in operation and, when the suction cover is removed from the opening, the suction valve stop is removable.

Abstract: A pump assembly for a penile implant is provided having a mechanism which prevents spontaneous inflation of the cylinders implanted within the user. The preventative mechanism uses overpressure generated by the reservoir during unintentional compression to effectively seal the pump assembly from unintended fluid flow. The prevention mechanism itself creates all necessary forces to prevent the undesired fluid flow to the cylinders. This is accomplished by incorporating appropriate mechanisms within the pump itself.

Abstract: A fluid end for a high-pressure pump including a unitary body with a plurality of horizontal passages each for receiving a reciprocating plunger at one of its ends and a pressure relief valve at the other of its ends. The body is provided with a corresponding number of vertical passages each of which intersect one of the horizontal passages and contains a suction valve at its bottom and a discharge valve at its top. A suction manifold is hingedly attached to the bottom of body to provide a flow of fluid into the body via the suction valves. A discharge passage intersects the vertical passages and receives fluid pressurized by the plungers via discharge valves and ports such from the fluid end.

Abstract: A fluid end for a high-pressure pump including a unitary body with a plurality of horizontal passages each for receiving a reciprocating plunger at one of its ends and a pressure relief valve at the other of its ends. The body is provided with a corresponding number of vertical passages each of which intersect one of the horizontal passages and contains a suction valve at its bottom and a discharge valve at its top. A suction manifold is hingedly attached to the bottom of body to provide a flow of fluid into the body via the suction valves. A discharge passage intersects the vertical passages and receives fluid pressurized by the plungers via discharge valves and ports such from the fluid end.

Abstract: A pump for boosting pressure of liquid color for injection into plastic resin in molding or extrusion apparatus includes a housing having a first bore extending in a first direction and second and third bores extending through the housing and communicating with the first bore proximate a first end of the first bore with the first end of the first bore being blind. The pump further includes an inlet check valve connectable to the second bore for permitting liquid flow through the second bore into the first bore. Further included is an outlet check valve connective to the third bore for permitting liquid flow out of the first bore through the third bore. A member is reciprocally axially movable within the first bore. A solenoid applies air pulses to the end of the first member facing oppositely from the blind end of the first bore.

Abstract: A valve arrangement for reciprocating machine, where the arrangement (1) comprises an in-valve (18) and an out-valve (19), each valve (18), (19) being a springloaded one-way valve designed to open for flow when the pressure differential in the direction of flow provides a force that exceeds the spring tension, wherein the valves (18, 19) are mounted in a casing (8) that forms or is connected to the cylinder head of the reciprocating engine (2). The in-valve (18) and the out-valve (19) are mounted in a sleeve (16) designed to be fitted in a bore (9) in the casing (8), and where fluid may flow to the sleeve (16) from an inlet (11) in the casing (8) and into the sleeve (16) via the in-valve (18), and where the sleeve (16) is provided with at least one perforated area where fluid may flow radially out of or into the sleeve (16) via holes (50, 51), thereby flowing to or from a passage (14, 15) that forms a perpendicular or near perpendicular connection with the bore (9).

Abstract: A micropump provided with a cylindrical body (1) containing a measuring chamber (10) defined by a piston (2) and communicating firstly with a tank via an inlet orifice (10a) provided with an inlet valve, and secondly with the outside via an outlet orifice (10b) provided with an outlet valve, the micropump being characterized in that the piston (2) is connected to an external reciprocating actuator, and in that at least one of said valves is constituted by a valve member (3, 6, 7) suitable for being driven in translation by friction contact with said piston (2) successively in one direction and then in the other, and whose stroke inside the chamber (10) is shorter than the stroke of said piston.

Abstract: The present invention provides a widely variable and yet precisely controlled system for metering the flow of fuel to an engine component. The present invention utilizes a plurality of solenoid activated injector valves to meter fuel into an output plenum where the fuel is accumulated to avoid pressure pulses and pressurized if necessary for introduction to the combustion chamber of a gas turbine engine. This system is particularly well suited to high pressure engine systems such as helicopter jet or turbo shaft engines.

Abstract: Valve guide and spring retainer assemblies are described for use in plunger pump housings that incorporate structural features for stress-relief. These pump housing structural features accommodate correspondingly-shaped valve guides and/or spring retainers that are internally fixed in place using one or more non-threaded spacers. Plunger pumps so constructed are relatively resistant to fatigue failure because of stress reductions, and they may incorporate a variety of valve styles, including top and lower stem-guided valves and crow-foot-guided valves, in easily-maintained configurations. Besides securing valve guides and/or spring retainers, non-threaded spacers may be shaped and dimensioned to aid in further reducing stress and to improve volumetric efficiency of the pumps in which they are used.

Abstract: A magnetic pumping system includes a pump, capable of urging a fluid therefrom during a forward stroke and a return stroke, having a piston disposed within a cylinder defined by a pump body, and a driver disposed external to the pump body. The driver is capable of moving the piston by a magnetic field interaction between the driver and the piston. The system further includes a check valve bridge, spaced away from the pump and in fluid communication with the cylinder, capable of allowing ingress and egress of the fluid into and out of the cylinder in response to a movement by the piston.

Abstract: A pump (10) includes a chamber (14) communicating with a fluid inlet (12) and a fluid outlet (13) above the centerline thereof to minimize dead air space where air bubbles might form. A connector (21) having a bend or elbow (26) is formed at the fluid inlet (12). Upon actuation of a solenoid (37), a plunger (39) carrying a diaphragm (42) is moved to draw fluid around the elbow (26), through a valve (19) positioned at the fluid inlet (12), through the chamber (14), and out of the pump (10) through a valve (30) positioned at the fluid outlet (13). The energy of the fluid which might otherwise create a water hammer effect is absorbed by the elbow (26) prior to reaching the pump (10).

Abstract: A Y-block fluid section plunger pump housing has a cylinder bore which is transversely elongated at its intersection with suction and discharge bores to provide stress relief and a reduction in housing weight. A spoked ring valve spring retainer ring further reduces stress near the bore intersection and allows use of a top stem guided suction valve. Tapered cartridge packing assemblies facilitate use of a one-piece plunger in Y-block housings and also allow packing in such housings to be changed without removing the plunger.

Abstract: A method for estimating the pressure, i.e., pressure stroke, in a wheel brake cylinder, in particular in connection with a vehicle stability control system for calculating an effective control time, assignable to an instantaneous controller cycle, of an PWM-controlled valve actuating the wheel brake cylinder, on the basis of an actual control time definable by a control unit during the instantaneous controller cycle or an effective control time assignable to a preceding controller system and a valve stroke relative to a maximum stroke; and for calculating a pressure stroke of the wheel brake cylinder between two consecutive controller cycles, based on a valve pressure/volume characteristic retrievable from the control unit; an effective pressure difference across the valve; and the calculated effective control time.