Abstract: Systems for a plastic pump/actuator capable of containing and pumping organic solvents and lubricants and having a more desirable lubricity within the system. The system has at least two cylinders, with plungers therein, oppositely disposed from each other and configured to operably connect to a pump.

Abstract: A method of controlling a gas compression system includes comparing an engine load of an engine of the gas compression system during operation to a load threshold and controlling a suction valve coupled to an intake of a reciprocating compressor. The suction valve is controlled based at least in part on the comparison of the engine load to the load threshold. Controlling the suction valve includes incrementing the suction valve toward a closed position to reduce flow of a gas into the intake when the engine load is greater than or equal to the load threshold.

Abstract: A needle-free connector including a guiding base, a connecting base, a valve member, and a seal member is provided. The guiding base has a conduit, and the conduit extends downward along an axial direction. The connecting base is disposed on the guiding base and has a screw portion and a passage running through the screw portion. A chamber is formed between the guiding base and the connecting base, and the conduit and the passage respectively communicate with the chamber along the axial direction. The valve member is disposed between the guiding base and the connecting base, and is movably located in the chamber. The seal member is disposed at an end of the valve member far away from the conduit, and the seal member and the valve member are adapted to be connected into a whole in a manufacturing process.

Abstract: A fluid pump includes a pump body enclosing a first cavity and a second cavity, a first flexible member disposed within the first cavity, a second flexible member disposed within the second cavity, and a drive shaft extending between and attached to each of the first flexible member and the second flexible member. The drive shaft is configured to slide back and forth within the pump body. The pump also includes a first shift valve and a second shift valve disposed between the first flexible member and the second flexible member, operatively coupled to deliver a drive fluid to drive fluid chambers in alternating sequence. Some fluid pumps disclosed herein include a housing defining a modular-receiving cavity and a modular insert secured within the modular-receiving cavity by an interference fit. Methods of manufacturing and using fluid pumps are also disclosed.

Abstract: A compressor has suction reed valves each of which includes a fixation portion fixed to the valve base plate, a basal portion that extends from the fixation portion and is separable from the plate, and a valve flap extending from the basal portion toward the distal end to selectively open and close the suction port. Each suction port has a shape elongated in the width direction, which is orthogonal to the longitudinal direction. The width of the basal portion is greater than that of the suction port. Each valve flap includes an opening-closing portion facing the corresponding suction port and stoppers, which project from the ends in the width direction. The side edges in the width direction are continuous from the stoppers to the basal portion to gradually approach the suction port. The cylinder block has pairs of recessed retainers. The stoppers contact the retainers.

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 sucker rod pump with no travelling valve consisting of, from the bottom: hold down with pump inlet, lower standing valve, hollow coupling, upper standing valve suspended within the coupling, relief valve, hollow pump housing, solid piston within the housing, and barrel to clean and retain the piston in the housing. The piston attaches to and reciprocating with the rod string. Peripheral channels in the relief valve communicate between the coupling and the housing. A central channel in the relief valve communicates between the upper standing valve and the pump's outlets. The upstroke pulls fluid from the bottom of the well upward through the open lower standing valve, around the closed upper standing valve and into the housing chamber. The down stroke pushes fluid from the housing chamber past the closed lower standing valve and through the open upper standing valve to the pump's exit into the tubing.

Abstract: A discharge valve of a hermetic compressor includes a valve plate disposed on a cylinder head that draws in and discharges refrigerant according to reciprocal movement of a piston, and the discharge valve having a discharge hole formed therein through which refrigerant is discharged, a disc valve disposed adjacent the discharge hole of the valve plate, the disc valve being raised or lowered by the reciprocal movement of the piston and disc valve weight, and a stopper disposed above the disc valve, for guiding the raising and lowering of the disc valve and also for limiting the height to which the disc valve may be raised. The compressor is not subject to overload or over pressurization that may otherwise result from an elastic closing force operating in the valve, and as a result, compression efficiency is increased, while noise is decreased.

Abstract: A sanitary pump station for removing waste from recreational vehicle and pleasure craft waste tanks is provided. A pump station housing encloses a motor driven pump provided with at least a pair of one-way valve arrangements in both inlet and outlets to the pump. A waste hose is connected to the pump inlet and stored on a reel device within the housing. A water hose connected to an external water source is also provided. The water hose is also stored in the housing on a second reel. The respective hoses may be pulled from the housing, selectively, and after use, may be rewound on the reels by a rewind mechanism selectively engageable with drive pulleys associated with the respective reels. A universal adaptor is also provided to enable connection between the waste hose and the termination valve of the waste tank.

Abstract: In a rotary type compressing apparatus, a check valve is positioned in a refrigerant gas inhalation unit, and an exhaust valve is positioned in a refrigerant gas exhaust unit. In addition, a control valve is employed at an inlet section of an exhaust pipe. One end of this exhaust pipe is opened inside a muffler which forms airtight space within a closed case. This control valve is actuated by means of a slider valve body by receiving specific pressure.

Abstract: A beam pump for use as a chemical injection pump in conjunction with a walking beam and having a pump shaft which is slidable within a pump body. The shaft is pivotally connected to a lever bar which is drivingly connected to the walking beam. A pivot support bar is semi-rigidly attached to the beam pump body and is pivotally attached to the lever bar. The semi-rigid attachment enables the pivot support bar to move slightly in order to maintain the vertical alignment of the pump shaft with respect to the pump body. Further guidance and sealing is provided by an O-ring seal which is made up of a solid lubricant material, a guide plug and a spring loaded seal ring and back up seal. The pump shaft and pump body surrounding said shaft are coated with a solid lubricant material. Further lubrication of the pump shaft is accomplished by lubrication passages within the pump body.

Abstract: The downhole pump of the present invention includes a piston housing with a plurality of piston assemblies disposed in the piston housing. Each piston assembly includes a piston reciprocatingly disposed in a cylinder. A valve body is connected to the piston housing and includes a plurality of inlet poppet assemblies disposed therein. One of the inlet poppet assemblies is located below and communicated with each of the cylinders for controlling a fluid intake to the cylinders. A plurality of outlet poppet assemblies is also disposed in the valve body. One of the outlet poppet assemblies is located below and communicates with each of the cylinders for controlling a fluid discharge from the cylinders. A master outlet check valve assembly is located below and communicates with all of the outlet poppet assemblies for preventing discharge fluid from flowing back to the outlet poppet assemblies.

Abstract: A pump apparatus for transferring precise amounts of fluid from a container to a patient has a defined volume pump chamber divided by a first diaphragm to define a first chamber and a second chamber. A pumped fluid enters the first chamber through a one-way valve as the first chamber volume increases and is exhausted through a second one-way valve as the first chamber volume decreases. A third one-way valve is coupled to the first and second one-way valves in such a way as to prevent the pumped fluid from flowing through the pump in response to a pressure head at the input or output ports. A priming chamber is divided by a second diaphragm to define first and second sections, respectively. A passageway extends between the first section and the passageway connecting the second and third one-way valves.

Abstract: A combined delivery and damping valve unit for a fuel system of a compression ignition engine comprises a body having a bore including a wider portion and a narrower portion. A spring abutment for the spring biasing the delivery valve member serves as a seating for a damping valve member. The abutment is retained against the step defined between the wider and narrower portions of the bore by locking members having a wedge section and biased by a spring.

Abstract: A pumping apparatus for moving a pumped fluid from a reservoir to a destination in response to variations in the pressure of a pumping fluid includes a pump housing; a pumping chamber; an input passageway; an exit passageway; and a passageway network between the input passageway and the exit passageway. A diaphragm divides the pumping chamber into first and second volumes for respectively receiving the pumped and the pumping fluids. Apparatus is provided for intermittantly varying the pressure of the pumping fluid. A first diaphragm valve responsive to variations in the pressure of the pumped fluid is positioned between the input passageway and the passageway network. A second valve also responsive to variations in the pressure of the pumped fluid is positioned in the passageway network for being opened when the first valve is closed and visa versa.

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: A method and apparatus for pumping combustible gases at high pressure without raising the gas to its combustion temperature, the apparatus including a piston-type pump having an intake chamber communicating with a cylinder through intake valves, a discharge chamber communicating with the cylinder through discharge valves, the intake chamber and the discharge chamber having cooling means therearound for cooling gas in the chambers, the valving being such that gas must pass entirely through the intake chamber for maximum cooling on intake, and gas must pass entirely through the discharge chamber on discharge for maximum cooling on discharge, some gas being held in the discharge chamber during compression of the gas for maximum cooling.

Abstract: Apparatus for connecting to a pump inlet where a first inlet feedpipe is attached including a second inlet feedpipe tap having a one-way check valve, and a resilient orifice member in the first inlet feedpipe upstream of the tap, whereby the orifice size is less than the inlet feedpipe size so as to provide a flow restriction for periodically creating negative pressure in the region of the tap, to draw liquid from the second inlet feedpipe into the first inlet feedpipe.

Abstract: An automobile engine driven fuel pump operates to cause alternate fuel pumping and fuel vacuum cycles in a fuel pumping chamber and concurrent alternate air vacuum and air pumping cycles respectively in an air pumping chamber and also to maintain a normally closed fuel control valve open in the fuel supply conduit to the pump during the fuel vacuum and air pumping cycles completely independently of the fuel pumping cycles. If the engine stalls, as for example in the event of a collision or automobile roll-over, the pump will stop and the control valve will close to prevent fuel leakage from the supply conduit. Pressure in the supply conduit also urges the control valve to its closed position.

Abstract: The invention is concerned with an improvement in a manually activated fuel priming pump for an internal combustion engine comprising a housing having a barrel communicating at its lower end with a flange disposed transversely to the barrel. A plunger communicates at its upper end with a handle, the plunger being reciprocally mounted in a chamber of the barrel to selectively pump fuel from a first to a second valve located in the flange of the housing. The plunger has around the periphery thereof means slidingly sealing it with low friction against a bore defining the chamber. The improvement of the invention comprises a member co-axial with the plunger and extending therefrom towards the flange and member-bore seal means slidably sealing said member to said bore and disposed to allow flow of said fuel from a space within said chamber between said plunger and said flange to said second valve and to retard flow of said fuel in a reverse direction.

Abstract: A shut-off valve for the automotive fuel system is operable to shut off the fuel flow whenever a positive pressure exists in the fuel line between the fuel tank and the shut-off valve. The shut-off valve may be employed in combination with a fuel pump or may be employed separately in the fuel line and comprises a flexible diaphragm connected by a stem directly to the valve member and movable with the valve member. The diaphragm air chamber has an air vent controlled by a vent valve providing a relatively large opening for bleeding in air and providing a relatively small opening for exhausting air from the diaphragm air chamber. The vent valve thus permits a relatively fast movement of the valve member to an open position and a relatively slow or restricted movement of the valve member toward a closed or partially closed position.

Abstract: The invention relates to a fuel oil supply assembly of the type having a magnetic pump and an armature for driving a pump element or piston which is a part of a resilient oscillatory system. A flow restricting pressure regulating vlave in the delivery line is itself regulated in a manner such that the stroke of the oscillatory system is automatically adjusted so that only the exact quantity of oil required by the nozzle is delivered. The intermittent delivery movement inherent in the oscillatory system is thus made smoother by a damping of the oscillations which results from the piston being caused to travel over only a fraction of its maximum stroke.