Abstract: A toothbrush tip includes a brush head, a plurality of bristle tufts extending from the brush head, a water jet nozzle extending from the brush head, and a cover panel arranged on a rear of the toothbrush tip opposite the bristle tufts.

Abstract: Disclosed are a pressure regulator for reciprocating pumps comprising an audible low pressure blow off and pumps comprising the pressure regulator. Also described is a pump comprising a larger diameter barrel with a higher volume for inflating an inflatable object at a lower pressure and a smaller diameter barrel with a lower volume for inflating an inflatable object at a higher pressure, wherein the pump is switchable to operate using either the larger diameter barrel or the smaller diameter barrel using a single lever attached to an end cap of the smaller diameter barrel.

Abstract: A fluid pump comprising a fluid inlet configured to receive a fluid, a plunger configured to reciprocate within a cylinder from a top dead center position to a bottom dead center position and back to the top dead center position during a given pumping cycle, a pumping chamber defined by the cylinder and the plunger, the pumping chamber being configured to receive the fluid from the fluid inlet, a control valve configured to open to allow fluid to be provided to the pumping chamber, and close after the plunger has passed the bottom dead center position, and a fluid outlet configured to receive a delivery amount of the fluid from the pumping chamber, wherein a first amount of fluid is configured to be provided to the pumping chamber, the first amount of fluid being greater than the delivery amount of fluid.

Abstract: Disclosed is a piston pump for a brake system installed in a bore of a modulator block communicating with an inlet port and a discharge port, wherein the piston pump includes: a cylinder unit provided to reciprocate within the bore; a piston unit having one end fixed and the other end dividing the inside of the cylinder unit into a first chamber and a second chamber and configured to expand or reduce the internal spaces of the first chamber and the second chamber by reciprocating movement of the cylinder unit; a first inlet valve installed in the cylinder unit to open and close an one-way flow of fluid from the inlet port to the first chamber; a second inlet valve installed in the cylinder unit to open and close an one-way flow of fluid from the inlet port to the second chamber; and an outlet valve to open and close an one-way flow of fluid from the first chamber or the second chamber to the discharge port.

Abstract: A supplementary device for a manually operable injection device, the supplementary device including a body having at least one engaging member to releasably mount the body to the injection device in a specific position on an outside surface of the injection device, and at least one indicator located on the body and having a shape or contour to overlap or to align with a mark on the outside surface of the injection device when the body is in or near the specific position.

Abstract: A pump which is adapted to be operably moved or to use a high-pressure air cartridge to inflate an object includes a cylinder assembly, a first nozzle head assembly, and a second nozzle head assembly. The pump that is operably moved will induce external air in a chamber defined in the cylinder assembly. The first nozzle head assembly is engagable with the air cartridge and the object and allows high-pressure air in the air cartridge to flow into the object. The first nozzle head assembly is not in fluidal communication with the chamber. The second nozzle head assembly is engagable with the object and allows the air in the chamber to flow into the object by operably moving the pump.

Abstract: A variable-volume pump comprises one or more reciprocating pistons within respective reciprocating cylinders. The phase relationship between the reciprocating piston(s) and the reciprocating cylinder(s) determines the volumetric output of the pump.

Abstract: A head for an air pump includes a housing, a nozzle, an urging mechanism, and an end cap. The housing includes a first compartment defined therein and including a first end defining an opening port and a second end enclosed by an end wall. The housing further includes a hole extending therethrough and into the first compartment. The nozzle device is disposed within the first compartment. The urging mechanism includes a cam, an axle and a pivoting member. The cam is disposed in the first compartment and abuts against the nozzle device. The axle is inserted into the housing through the holes and engages with the cam. The pivoting member is connected to the cam by engaging with a terminal end of the axle.

Abstract: In one embodiment, a volumetric pump in a medical fluid delivery system comprises at least one piston in a hollow cylinder, the pump having at least one inlet port through which a medical fluid can be sucked into a pump chamber during an instroke of said piston, and at least one outlet port through which the medical fluid can be expelled during an outstroke of the piston. The piston or the hollow cylinder can be actuated directly or indirectly by a rotor. This rotor transmits on the one hand a bi-directional linear movement to the piston or to the cylinder and on the other hand, a bi-directional angular movement either to the piston or to another ratable element in order to open and close alternately the inlet and outlet ports.

Abstract: A reciprocating air pump with a frame and a pump for compressing air through a series of linear close-strokes and open-strokes between a first portion and a reciprocating portion. The pump includes plural cylinders, slideably and sealably engaged therein, and arranged as multiple-chambers defining multiple-stages, for compression of air. A manifold with an air inlet cavity and inlet vent, and a compressed air outlet cavity with outlet vent. An outlet valve body is disposed between the first portion and the manifold, with an outlet valve that directs high-pressure compressed air into the outlet cavity, and with an inlet port coupled to the inlet cavity. A reciprocating linear drive with an electric motor delivers linear force to the reciprocating portion. A control system sequentially alternated the direction of force of the reciprocating linear drive, thereby applying linear force to the reciprocating portion.

Abstract: A linear compressor has a hollow piston with crown and sidewall. The piston reciprocates in a cylinder. A piston rod connects the piston to a spring. A connection between the piston rod and the piston transmits axial forces directly to the piston crown. The connection transmits lateral forces to the piston at an axial location away from the piston crown. The connection allows rotational flexibility between the piston and the piston rod transverse to and uniformly around the piston reciprocation axis. Other improvements in or relating to linear compressors are disclosed.

Abstract: A multiple-chamber, multiple-stage reciprocal pump for compressing air through a series of up-strokes and down-strokes. The pump includes an upper reciprocal portion and a fixed portion. The fixed portion further includes a base housing with an ambient air inlet cavity and a compressed air outlet cavity formed therein. It further includes an outlet valve body fixed to the base housing with an outlet valve pneumatically coupled to direct high-pressure compressed air into the outlet cavity. The outlet valve body also has an inlet port pneumatically coupled to the inlet cavity, and there are plural cylinders coupled to the outlet valve body, which slideably and sealably engaged with the upper reciprocal portion, thereby enabling the series of up-strokes and down-strokes to compress air.

Abstract: A volumetric pump (1) comprising a piston (2) and a cylindrical chamber (3), contains an inlet port (10) and an outlet port (11). The piston (2) is actuated by a rotor (5) bearing an eccentric shaft (6). The shaft (6), being connected to the piston (2), causes the piston to slide back and forth inside the cylinder chamber (3) while having a bidirectional angular movement. The instroke of the piston (2) sucks a fluid (15) from the inlet port (10) through a first channel (12) into the pump chamber (3), the fluid being propelled through a second channel (13) to the outlet port (11) during the outstroke of the piston (2). The inlet (10) and outlet port (11) are opened and closed alternatively by the bidirectional angular movement of the piston (2) which acts as a valve for the inlet and outlet ports (10, 11).

Abstract: A variable flow pump includes: a housing with inlet and outlet chambers interconnected by a main bore and a non-rotating cylinder block positioned in the main bore. The cylinder block includes: a central bore communicating with the inlet chamber; cylinder bores arrayed around the central bore; first feed passages interconnecting the inlet chamber and the cylinder bores, defining a bypass flowpath between the cylinder bores; and at least one discharge valve disposed at the second end which permits fluid flow from the cylinder bores to the discharge chamber but prevents opposite flow; Pistons are disposed in the bores. A shaft is coupled to the pistons so as to cause them to reciprocate through an axial pump stroke when the shaft is rotated. A mechanism is coupled to the cylinder block which modulates the axial position of the cylinder block within the housing, varying the size of the bypass flowpath.

Abstract: A method and a system for jetting droplets of viscous medium, such as solder paste, onto a substrate, such as an electronic circuit board. The volume of the droplets are adjusted by regulating the amount of viscous medium that is fed into a jetting nozzle for subsequent jetting of the viscous medium droplets therefrom. The exit velocity of the jetted droplets is adjusted or maintained substantially constant by regulating the velocity with which the viscous medium is impacted. Furthermore, the rate at which viscous medium is fed, for instance by a feed screw, into the nozzle is adjusted in order to regulate the feeding time required for feeding the viscous medium into the jetting nozzle, for instance in order to maintain a constant feeding time.

Abstract: A fluid metering system includes a housing having a piston chamber with first and second spaced ends, at least one housing inlet passage, and at least one housing outlet passage. The housing inlet and housing passages communicate with the piston chamber. A piston is disposed in the piston chamber for reciprocal movement between the first and second ends of the piston chamber to alternatingly define first and second volumes therein. At least one first slot, and at least one second slot are formed on the outer surface of the piston, and extend from respective ends of the piston toward the respectively opposite ends. The first slot has an opening that is in communication with the first volume, and the second slot has an opening in communication with the second volume.

Abstract: A pump includes a base, a pumping set, a first joint, a gauge set, a second joint and a nozzle. The base includes a socket. The gauge set includes a gauge, a housing for receiving the gauge and a tube extending from the housing. The pumping set includes a cylinder inserted in the socket and a piston put in the cylinder. The first joint is put in the cylinder and includes a transverse channel and an axial channel communicated with the transverse channel. The second joint is inserted in the socket, the cylinder, the transverse channel of the first joint and the tube. The second joint includes an axial channel, a first transverse channel for communicating the axial channel hereof with the axial channel of the first joint and a second transverse channel for communicating the axial channel thereof with the tube. The nozzle is communicated with the second joint.

Abstract: A pump is capable of inflating and deflating an inflatable object. The pump includes a cylinder, a piston and a nozzle. The cylinder defines an outlet through which air can only flow into the cylinder and an inlet through which air can only flow from the cylinder. The piston reciprocates in the cylinder. The nozzle defines a first hole for communication with the inflatable object and a second hole for communication with the exterior. The nozzle is rotationally mounted on the cylinder between an inflating mode and a deflating mode. In the inflating mode, the first hole is communicated with the outlet, and the second hole with the inlet. In the deflating mode, the first hole is communicated with the inlet, and the second hole with the outlet.

Abstract: An air pump includes a connector connecting to an air nozzle of an object to be inflated, a holder block connected to the connector and having a valve chamber, an air cylinder air inlet and a manual charge air inlet extended from the vale chamber to the rear side thereof, and an air passage extended from the valve chamber to the inside of the connector, a press button mounted in the holder block and movable between a first position and a second position, a fixed cylinder connected to the holder block and holding an air cylinder, and a movable cylinder sleeved onto the fixed cylinder for reciprocating to pump air into the fixed air cylinder.

Abstract: A pump is capable of inflating and deflating an inflatable object. The pump includes, a cylinder, a piston and a nozzle. The cylinder defines an outlet through which air can only flow into the cylinder and an inlet through which air can only flow from the cylinder. The piston reciprocates in the cylinder. The nozzle defines a first hole for communication with the inflatable object and a second hole for communication with the exterior. The nozzle is rotationally mounted on the cylinder between an inflating mode and a deflating mode. In the inflating mode, the first hole is communicated with the outlet, and the second hole with the inlet. In the deflating mode, the first hole is communicated with the inlet, and the second hole with the outlet.

Abstract: A pump includes a base, a pumping set, a first joint, a gauge set, a second joint and a nozzle. The base includes a socket. The gauge set includes a gauge, a housing for receiving the gauge and a tube extending from the housing. The pumping set includes a cylinder inserted in the socket and a piston put in the cylinder. The first joint is put in the cylinder and includes a transverse channel and an axial channel communicated with the transverse channel. The second joint is inserted in the socket, the cylinder, the transverse channel of the first joint and the tube. The second joint includes an axial channel, a first transverse channel for communicating the axial channel hereof with the axial channel of the first joint and a second transverse channel for communicating the axial channel thereof with the tube. The nozzle is communicated with the second joint.

Abstract: The syringe pump comprises a housing (10). The operating panel (32) is situated on a swiveling lid (30) on the front side of the housing (10). The lid (30) further comprises a window (34) with a magnifying device (35) through which the user can view the syringe. The invention allows for a miniaturization of the syringe pump in a highly densified modular system. The lid (30) may further include a lighting means for illuminating the syringe.

Abstract: A positive displacement extruder for a viscous material, such as unvulcanized rubber, includes a feed member arranged in a chamber of a main body and driven for rotation so that the viscous material charged into the chamber is extruded from its outlet. A mouthpiece has an inlet that is spaced in a circumferential direction from the outlet of the main body and, in communication therewith, an extrusion nozzle. At least one cylinder device is rotatable about a center axis of the extruder so that the cylinder is alternately bought into communication with the outlet of the main body and the inlet of the mouthpiece. The viscous material is charged from the chamber of the main body into the cylinder device and discharged from the cylinder device into the mouthpiece, as the cylinder device is rotated about the center axis of the extruder and the piston of the cylinder device is driven by a cam device to reciprocate in the cylinder.

Abstract: An air pump for a bicycle which can be stored inside the saddle post of a bicycle is disclosed. The hand air pump or foot-hand air pump are supported in the saddle post by friction generating means, latch means, support means and/or biasing means. Furthermore, a foot-hand air pump which is substantially cylindrical in shape and having no protruding parts is disclosed. Still further, the air/foot pump has certain parts thereof not only providing their intended function in pumping air but also providing the function of generating friction is disclosed.

Abstract: A hand pump includes a head, a cylinder, a piston rod, a first handle, and a second handle. The head includes a valve-engaging portion for engaging with a valve of an article to be inflated. A first end of the cylinder is connected to the head. A piston is securely mounted to a first end of the piston rod for reciprocation in the cylinder. The first handle is securely attached to a second end of the piston rod that extends beyond a second end of the cylinder. The second handle is attached to the head to provide an auxiliary grip.

Abstract: A positive displacement pump is composed of a first actuator for relatively moving a piston and a housing, a cylinder for accommodating the piston, and a second actuator for relatively moving the cylinder and the housing.

Abstract: A plunger for being inserted in a tubular barrel in an axially movable manner includes a plunger body having a distal end positioned within the barrel and a proximal end positioned outside of the barrel, and a seal member disposed on the distal end of the plunger body. The seal member has a base portion extending from the plunger body towards the distal end of the barrel, and a flange portion radially outwardly extending from the base portion and having a peripheral edge contacting an inner circumference of the barrel so as to define an accommodation space within the barrel.

Abstract: The invention relates to a piston pump for a slip-controlled hydraulic vehicle brake system. For the sake of a short structural length of the piston pump, piston of the piston pump is a hollow piston, whose interior forms a positive displacement chamber of the piston pump. The piston can be produced economically as a reshaped part, for instance by deep drawing.

Abstract: A positive displacement pump is composed of a first actuator for moving a piston and a housing relatively, a cylinder for accommodating the piston, and a second actuator for moving the cylinder and the housing relatively.

Abstract: A manual air pump includes an outer cylinder comprising a chamber therein, a head provided to an end of the outer cylinder, the head including an outlet passage communicated with the chamber for supplying air to an object to be inflated, and an inner cylinder reciprocatingly mounted in the outer cylinder. An outer piston is attached to an end of the inner cylinder to move therewith and includes a passage for communicating a longitudinal bore of the inner cylinder with one of the outlet passage of the head and the chamber of the outer cylinder. A piston rod is reciprocatingly mounted in longitudinal bore of the inner cylinder and an inner piston is attached to an end of the piston rod to move therewith. A handle is secured to the other end of the piston rod to move therewith. The inner cylinder is rotatable relative to the outer cylinder.

Abstract: A manual air pump includes an outer cylinder comprising a chamber therein, a head provided to an end of the outer cylinder, the head including an outlet passage communicated with the chamber for supplying air to an object to be inflated, and an inner cylinder reciprocatingly mounted in the outer cylinder. An outer piston is attached to an end of the inner cylinder to move therewith and includes a passage for communicating a longitudinal bore of the inner cylinder with one of the outlet passage of the head and the chamber of the outer cylinder. A piston rod is reciprocatingly mounted in longitudinal bore of the inner cylinder and an inner piston is attached to an end of the piston rod to move therewith. A handle is secured to the other end of the piston rod to move therewith. The inner cylinder is rotatable relative to the outer cylinder.

Abstract: A manual air pump includes an outer cylinder having a chamber therein, a head provided to a second end of the outer cylinder and including an outlet passage communicated with the chamber for supplying air to an object to be inflated, and an inner cylinder reciprocatingly mounted in the outer cylinder and including a longitudinal hole. An outer piston is attached to an end of the inner cylinder to move therewith. The outer piston includes a passage that is intercommunicated between the longitudinal hole of the inner cylinder and the outlet passage of the head. A piston rod is reciprocatingly mounted in longitudinal hole of the inner cylinder. An inner piston is attached to a second end of the piston rod to move therewith. A handle is secured to a first end of the piston rod to move therewith. A switch member is rotatably mounted to the first end of the outer cylinder and around the first end of the inner cylinder.

Abstract: A pump used in a power toothbrush for fluid delivery to the bristles. The pump moves fluid provided to it to a dispensing valve located in the brushhead. The pump includes a pump chamber with a piston ball located therein. The piston ball moves within the chamber in response to movement of the brushhead, moving fluid out a discharge end of the pump chamber under pressure. The pump includes a fluid exit channel which connects the discharge end of the pump chamber with an opening in the brushhead in which the dispensing valve is located.

Abstract: A manual air pump includes a cylinder having a first chamber and a head provided to the second end of the cylinder. The head includes an outlet passage communicated with the first chamber for supplying air to an object to be inflated. A first piston rod has a first end with a first piston slidably received in the first chamber. The first piston separates the first chamber into a first chamber section adjacent to the head and a second chamber section distal to the head. The first piston rod defines a second chamber therein. A second piston rod has a first end with a second piston slidably received in the second chamber. The second piston separates the second chamber into a third chamber section adjacent to the first piston and a fourth chamber section distal to the first piston. A handle is secured to the second end of the second piston rod to move therewith.

Abstract: A pump includes a first cylinder with a first valve member connected to a first end of the first cylinder and a first handle disengagably connected to a second end of the first cylinder. A first piston is movably received in the first cylinder and a second cylinder fixedly connected between the first handle and the first piston. A second piston is movably received in the second cylinder and a rod is connected to the second piston. The rod extends through the first handle and connected to second handle which is disengagably connected to the first handle. The movement of the first piston is used to pump tires and the movement of the second piston is used to pump a cylinder of air suspension device.

Abstract: A reciprocating pump is provided for pumping subterranean fluids containing fine solids to surface. The pump comprises a pump barrel, piston and piston rod. The piston rod is suspended form reciprocating production tubing. The barrel is anchored in the casing of a well. A standing valve is located at the bottom of the barrel. The piston and travelling valve are located at the bottom of the piston rod for minimizing the dead-space between standing and travelling valves. Upper and lower stacks of hydraulic piston seal rings are positioned on the piston above and below the travelling valve for minimizing piston height. Each seal has radially flared lips at its leading edge. The piston spaced grooves formed therein, corresponding to the seal ring flared lips.

Abstract: An air pumping station for a pneumatic toy vehicle powered by a re-fillable compressed air bottle or canister includes a stabilizing base having a flat ground engaging horizontal lateral bottom including a horizontal projecting geometry proportioned for placement under the feet of the user. The station also includes a fluid-tight vertical cylindrical housing. The station includes a reciprocating piston having a first end in fluid tight relation to interior walls of the housing and a second end defining hand-grippable pumping handles. The station has an air intake valve for the cylindrical housing. The pumping station includes an element for selectable clamping and unclamping of the toy vehicle to at least a first surface of the cylinder, however offset therefrom by a sufficient distance to avoid the reciprocal movement of the piston and grippable pumping handles. The cylinder includes an air exhaust aperture in fluid communication with the base of the cylinder.

Abstract: A tire pump includes a head portion with a tubular portion extending therefrom and a main passage is defined through the head portion and communicates with the tubular portion, a connecting member slidably mounted to the tubular portion and having at least one first passage defined therethrough, a first cylinder retractably mounted to the tubular portion and having one of two ends fixedly connected to the connecting member and a first member slidably received therein which is fixedly connected to a free end of the tubular portion and detachably connected to the connecting member by an actuating device and has a uni-directional valve disposed therein. At least one second cylinder is retractably mounted to the first cylinder and has a second member slidably received therein which has a uni-directional valve disposed therein and a portion fixedly received in the other end of the first cylinder. A third member is fixedly received in the second cylinder and has a uni-directional valve disposed thereto.

Abstract: A hand pump includes a cylindrical member having a cap secured on top and a cover securing the cap to the cylindrical member. A large piston is slidably engaged in the cylindrical member and a barrel secured to the large piston. A small piston is slidably engaged in the barrel for pumping air into the cylindrical member and the cover. The small piston may pump a low air pressure when the barrel is not secured to the cylindrical member and may pump a high air pressure when the barrel is secured to the cylindrical member.

Abstract: An actuator pump has one or more colinear piston cylinders (2, 3, 25) in a cylinder housing (1) in which change of volume is provided by reciprocative relationship of colinear pistons (4, 5, 23, 24,) in the colinear piston cylinders. One or more travel guides (6, 8) in sliding contact with guide cylinders (7, 9) in the cylinder housing are parallel to the travel guides. The colinear pistons and travel guides are attached to pump bases (10, 11) at opposite ends of the travel guides. Inward-pressured rings (14, 26), outward-pressured rings (29), fluid conveyances (16, 19, 30, 31), valves (36) and attachment components (21) for reciprocative actuation are provided selectively for particular design requirements.

Abstract: A device is proposed for applying material such as solder paste and glue in discrete points, particularly for applying solder paste on electronic circuit boards. The device comprises a pump house (202-205; 301, 307), a tube or a channel (206) by means of which material is fed to the pump house, a nozzle (111, 205) for feeding material from the pump house (202-205; 301, 307). Suitable upper and lower valve devices are arranged to block, at predetermined times, the feeding of material to and from the pump house (202-205; 301, 307). The lower valve device may possibly be replaced by a restriction device. As is conventional the pump house (202-205; 301, 307) comprises an outer pump cylinder (203; 307) and an inner piston (204; 301). The displacement of the piston (201; 301) is obtained by the fact that the piston is connected to a magnetostrictive rod (202; 308). This rod (202; 308) cooperates with a coil (208) arranged around the rod (202; 308).

Abstract: A fuel injection pump for internal combustion engines, where the driving source is the movement of an axle (11) held at the rod head whenever this is activated by the engine crankshaft (10), adjusting such movement by the use of auxiliary pieces (14, 17, 18), in order to get the alternative lineal movement required by the pump which is composed of a piston formed by four cylindric parts (25, 26, 27, 28), first and third part have an even diameter, second and fourth parts have a shorter diameter, the third part has a peripheric channel along it entire length (29), fourth part has an internal channel (30) with holes towards the periphery. The piston displaces within two consecutive sliding cylinders, the first cylinder (31) forms with the piston the compression chamber and at the time of sliding modifies the time when the injection is done. Second cylinder (32) fits into the fourth part of the piston and at the time of sliding modifies the amount of fuel passing from the compression chamber to the injector.

Abstract: The present invention pertains to a fluid aspiration-collection apparatus for aspirating and collecting a fluid into a suction chamber through a fluid inlet communicating with the suction chamber in the case, and for discharging the fluid through a fluid outlet after completion of fluid aspiration. A primary object of the present invention is to provide an apparatus which is simple in construction and is capable of aspirating the fluid at a constant pressure.

Abstract: A combined housing and air pump has a barrel type outside vessel one end of which is closed and the other end of which is open, a barrel type inside vessel one end of which is closed and the other end of which is open, and an air suction opening and an air discharge opening formed on the closed end of one of the outside vessel and the inside vessel, the inside vessel can be inserted from the opening of the outside vessel, and inside the outside vessel the outer periphery of the inside vessel is substantially very close to the inner periphery of the outside vessel and the inside vessel can rub in the axial direction of these vessels. The air suction opening has a check valve through which an air is allowed to pass only in the air suction direction, and the air discharge opening has removable nozzle separately formed. The container can be carried with things contained in the inside space sectioned by the two vessels.

Abstract: An air pump comprises a head; an air guiding tube fastened at one end thereof with the head and at another end thereof with a two-way air admitting piston; a first cylinder fitted over the two-way air admitting piston such that the first cylinder can be caused to move back and forth; a first one-way valve disposed in the anterior end of the first cylinder; a second piston disposed in another end of the first cylinder; a first one-way valve permitting air to enter only the first cylinder; a second cylinder fitted movably over the second piston; and a second one-way valve disposed in the second cylinder to permit air to enter only the second cylinder which is fastened with the first cylinder without being able to move in relation to the first cylinder.

Abstract: An oil pressure device for a jack whereby a hydraulic jack is adapted to raise rapidly until the lifting portion of the jack reaches a load sufficient to overcome a spring operating force, at which point the operation of the jack shifts to a slower, more powerful mode to raise the load.

Abstract: An apparatus for mixing two fluids in precise proportions which includes a quantifying meter and a concentrate meter. The apparatus also includes apparatus connecting the quantifying meter and the concentrate meter to simultaneously operate the quantifying meter and concentrate meter. The quantifying meter includes a servo plunger that is elongated and further includes a piston and a sealing member. The piston and the sealing member are axially spaced and the quantifying meter also includes a servo piston having a central bore in which the servo plunger is disposed in coaxial relationship with the piston in sealing engagement with the central bore. The servo piston includes a pressure fluid entrance port and an axially spaced outlet bore.

Abstract: A positive displacement shuttle pump having a cylinder with axially displaced and mutually isolated inlet and outlet portions; a shuttle piston having a reservoir for accepting pressurized feed from the inlet port in the feed cycle and for dispensing feed to the outlet port in the dispensing cycle; a displacement piston extending longitudinally in the shuttle piston and communicating with the reservoir; an actuator for extending the displacement piston into the reservoir to pressurize the feed and urge the feed through the outlet port during the dispensing cycle; the displacement piston is responsive to the pressurized feed in the reservoir for retracting during the feed cycle; the displacement piston driving the shuttle piston through the feed and dispensing cycles.

Abstract: A high pressure plunger pump comprises a centrally arranged pressure valve, an oscillatingly movable plunger, a sleeve guided on the plunger and limiting a working chamber, a suction pump which surrounds the sleeve and accommodates an aspirated fluid, the sleeve having a ring chamber which opens towards the plunger, and a bush which is arranged in the ring chamber and supported against the plunger, the bush abutting against the plunger.

Abstract: A bore hole pump which eliminates the need for a piston sealingly engaging with the walls of the pump body. The pump comprises a hollow body closed at its lower end by a non-return inlet valve and slidably and sealingly supporting at its upper end, via a seal, a reciprocating riser pipe which is likewise closed at its lower end by a non-return valve. Upward movement of the riser pipe causes fluid to be drawn into the pump body via inlet valve while downward movement of the riser pipe causes fluid to be expelled from the pump body via outlet valve.