Abstract: Two concentric vertical cylinders are separated by three radial partitions. An opening at the bottom of one of the partitions connects an air cell on one side of the partition with an outlet chamber on the other side of the partition. The two other partitions form sides of an inlet chamber, which receives fluid from outside the outer cylinder. The inner cylinder has a central pumping section positioned between upper and lower valve sections. In the valve sections ports extend through the inner cylinder wall to the inlet and outlet chambers. Spring loaded valves close the ports. Tension springs extend across the inlet chamber or compression springs extend across the inner cylinder to close the inlet valves. Tension springs extend across the inner cylinder to close the outlet valves. The elastomeric valve flaps have rigid curved backing members. A piston rod extends through one end cover to move a piston in the central section.

Abstract: A single valve diaphragm pump is disclosed which generally includes: a pump housing, a flexible diaphragm reciprocally movable in the pump housing; an inlet filter means; and, an outlet valve. The flexible diaphragm conforms in shape to a portion of the pump housing when the diaphragm is in its actuation or rest position. The pump eliminates an inlet check valve and replaces it with an inlet filter means. The invented pump has a stroke volume which is extremely constant even though ambient pressure and reservoir pressure may vary over a considerable range. Furthermore, the invented pump provides a practical means for preventing gas bubbles from entering into the pump chamber. The invented pump can have application as a medication pump for use external to or implanted within a living body.

Abstract: A positive displacement pump has a cylinder closed at one end and a plunger projecting from the opposite end reciprocable therein. Rings and packing are inserted at the opposite end to guide the plunger and are designed to provide that the plunger has a material clearance from the cylinder walls. To use a different sized plunger the rings and packing are designed for easy removal at the end of the cylinder and for replacement by rings and plunger corresponding to the new plunger section. A convenient manual linkage is provided for manual operation of the pump with the cylinder upright. A convenient horizontal frame is provided for the pump with a drive means for the pump used with the cylinder in a horizontal position.

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 reversing mechanism for a reciprocating pump provided in a common housing or module removably secured to the pump body adjacent to the pump shaft. The module housing includes top and bottom pieces which slide together with suitable tongue and groove elements. The top piece houses a reversing valve, and has a slot on the underside thereof for receiving a yoke member of the reversing mechanism. The sides of the slot form bearing surfaces parallel to the longitudinal axis of the pump shaft. The yoke slides or reciprocates on these bearing surfaces. The bottom piece comprises a support for opposed snap-acting springs. The yoke has a pair of upwardly extending spaced arms for actuating opposite ends of the reversing valve when it reciprocates, and a pair of downwardly extending spaced arms for engaging a transverse pin in the pump shaft as the shaft reciprocates. A central pin in the yoke couples it to the snap-acting springs. A special nested bearing structure is provided for the snap-acting springs.

Abstract: A diaphragm pump is disclosed of a configuration particularly adapted to pumping of liquids containing a high percentage of solids without clogging of the valving and/or pumping chamber. A flexible diaphragm overlies an opening in the pump housing which defines a pumping chamber below the diaphragm which is in communication with inlet and outlet valving chambers, in each of which is disposed respective gravity biased closed inlet and outlet valve overlying valving ports. The valves are guided by valve stems loosely fit into guide tubes extending above each of the valves. Both inlet and outlet flow is directed upwardly through the valve ports in order to insure a cleaning action to avoid clogging of the valves. The inlet flow is directed tangentially into the pumping chamber to create a scouring or turbulent flow action to minimize the tendency for sedimentation and consequent clogging of the pumping chamber.

Abstract: An automatic pump for deep wells comprises a long stroke reciprocating pump having its piston normally in its bottom position and an automatic control dependent upon the collection of a predetermined amount of liquid in the pump cylinder above the piston for actuating the piston to pump the liquid into a production line. The automatic control includes an electric motor driven hydraulic pump and a reservoir of hydraulic fluid which is actuated upon filling of the reciprocating pump chamber to supply hydraulic fluid to a closed chamber below the piston and force the piston upwardly to discharge liquid from the pump cylinder. Gas collected in the top of the pump cylinder results in low starting current and a saving of energy. The hydraulic pump is reversed automatically upon completion of the pumping stroke of the piston.

Abstract: The invention is directed to a dual-piston reciprocating pump assembly which includes two opposed substantially identical reciprocating pumps, a housing within which the pumps are mounted, a cam mounted on a cam shaft which is driven through a coupling by a stepping motor, each of the pumps including a piston assembly comprising a piston body having a piston end, the other end of the piston body being in the form of a yoke which is mounted for reciprocating motion in the housing, a cam follower carried between the arms of the yoke for engaging the cam face of the cam, a cylinder head having a piston cylinder therein for receiving the piston end, the housing having an end opening for receiving said cylinder head, a guide bushing mounted in the cylinder head for facilitating the assembly of the piston end, an inner bearing bore for the piston end disposed adjacaent the guide bushing, a high-pressure seal disposed adjacent the inner bearing bore, the piston end having substantial radial end play, and a piston sp

Abstract: The invention provides a high flow rate standing valve for oil wells of the type employing a plurality of check valve units disposed in parallel between inlet and outlet passages, the flow area of the inlet or outlet passage each being not in excess of the total flow areas of the individual check valves so that no significant pressure drop is produced by fluid flow through the check valves in their open position. Specifically, the invention provides an improved configuration for such standing valves permitting the convenient manufacture and assembly of the valve components. In a modification of the invention, the standing valve housing is constructed so that its lower end is mounted on and co-operates with a conventional well safety valve.

Abstract: A valve mount for a compressor pressure valve with a valve seat disposed in a bore formed in a cylinder head, wherein the valve mount is provided with a cooling chamber surrounding the external surfaces of a pressure chamber for transferring and dissipating heat from the valve parts including the valve seat.

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: A submersible deep well pump having two interconnecting chambers slidably receiving a movable hollow piston, each chamber having a check valve wherein movement of the piston alternately opens and closes the check valves allowing liquid displaced by the piston to be progressively moved through the chambers into the hollow piston and to the surface.

Abstract: A suction valve, preferably with a plate closing member, is made without any mechanical spring members and comprises a plate travel damper in the form of freely movable valve plate arranged on one or both sides of a pressure accumulating chambers having metering orifices through which flows gas under a mean pressure towards the closing orifice, a gas cushion is created to damp the travel of the plate.

Abstract: A plunger pump has a pump housing defining a pumping chamber into which a plunger extends for reciprocation between a retracted and an extended position. A sleeve valve is mounted on the plunger for displacement longitudinally thereof and for limited reciprocation therewith between an open position and a closed position in which it subdivides the pumping chamber into a pumping space within, and a suction space without, the sleeve valve. Inlet and outlet ports communicate with the suction and pumping spaces respectively. A sealing sleeve is mounted on a portion of reduced diameter of the plunger and defines with the latter a compensating space which communicates with a region of the interface between the sleeve valve and sealing sleeve at which the pressure of the fluid escaping from the pumping space through the interface is lower than the pumping pressure existing in the pumping space during the pumping stroke of the plunger.

Abstract: Double action piston pumps incorporate a check valve mechanism to control material flow between the pumping chambers and the pump outlet. The present disclosure includes an improved check valve mechanism which is mounted in the pump in free floating relation with the pump piston to permit more efficient closing of the check valve and therefore provide more efficient and consistent output flows. This check valve has an inner annular surface surrounding the pump piston and is separated therefrom by a clearance of between .035 and .085 inches. When the check valve is closed, during part of the pumping cycle, it seats on an improved valve plate thereby preventing a reversal of flow. The valve plate on which the check is seated is in a close dimensional tolerance with the piston rod to effectively scrape the piston rod clean thereby preventing the adhesion of the material being pumped to the piston rod.

Abstract: A reciprocating pump fabricated from an assembly including a body having a cylinder bore formed therein for receiving a reciprocating plunger, and with a transverse bore extending radially outwardly from the cylinder bore at a certain axial position, and passing through the wall of the pump body. A counterbore is formed along the cylinder bore and is arranged to receive a stacked assembly of guide means, packing means, and lantern ring means. The guides are operative to control the radial thrust on the plunger, while the lantern ring is arranged to provide communication from the interior of the cylinder bore to the atmosphere. The packing means includes a pair of axially displaced ring seals, one each being disposed on opposite sides of the lantern ring, and providing for mutual isolation between the pumping chamber of the pump and the crankcase.