Abstract: A dosaging pump which can be placed, in particular, on bottles or the like, having a pump bellows and two valves, one of which is associated with the inlet side and the other with a nozzle. The nozzle-side valve-closure member (10) is seated in the cover (10) of a cap which grips over the pump bellows. A cup surrounds the pump bellows, the inlet-side valve-closure member being seated in the bottom of the cup. End portions of the pump bellows are seated on separate collars of the cup and the cap, the cap and cup being moveable relative to each other during pumping, and the valve-closure members communicate with the interior of the bellows.

Abstract: Stopper (1) with valve (6) for a bottle, which stopper (1) and valve (6) are integral and of the same elastic material, the valve being surrounded by a circular raised edge (5) and a circular flange (4) for cooperation with a pump (15) made from plastic material.

Abstract: A free piston to be slidably inserted in the cylinder of an electromagnetic reciprocating compressor. The piston has a partition wall dividing the inner space of the cylinder into chambers, and a rod connected to the partition wall. The partition wall has an air hole. A valve member is attached to the front surface of the partition wall, and usually closes the air hole of the partition wall. The rod extends rearwardly from the rear-end surface of the partition wall. The rod has a substantially conical hole which extends rearwardly from the front-end surface of the partition wall. The piston further comprises a retainer cap closing the opening of the substantially conical hole and holding the valve member in an openable condition.

Abstract: To achieve a flywheel effect and lower the power necessary to drive it, a float pump is modified and put to use in such a way that one-half of the stroke of the pump is powered by the negative or positive buoyancy of the system of reciprocating components through which the pump is operated. As a result, the pump can be powered by even human leg power, such as by driving it through a pair of cranks pedalled in the manner of a bicycle. A reciprocable drive mechanism for the pump is also disclosed and claimed.

Abstract: In an electromagnetic pump, the inner end of an outlet pipe fixed in a pump housing extends for a predetermined length inside a sleeve housing a plunger to form a pump delivery pulsation absorption chamber around the outlet pipe. The inner end opening of this pipe is selectively closed by a control valve serving as a guide member for slidably guiding a valve body of a delivery valve along the axial direction. The fuel leakage prevention control valve and the pulsation absorption chamber are simply and optimally formed with a single construction.

Abstract: There is provided an improved airless paint spray pump having an intake, an inlet valve assembly, a pumping chamber, an outlet, an outlet valve assembly, and stroke pumping means for pumping the fluid paint into the pumping chamber through the intake during the intake stroke and through the outlet on the pumping stroke. The inlet valve assembly includes a flat valve which cooperates with a valve seat at the intake and is displaced from the valve seat during the intake stroke of the pumping means and is seated on the valve seat during the pumping stroke of the pumping means. The flat inlet valve replaces the previous ball type inlet or check valve thereby expanding the design capabilities of the pump.

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.

Abstract: A high pressure fluid pump having a telescoping cylinder assembly disposed in a cylindrical sleeve. The telescoping cylinder assembly has a stationary member rigidly attached to the cylindrical sleeve and a telescoping member biased towards an outlet port. The telescoping member is reciprocated relative to the stationary member by the displacement of an armature in response to the intermittent energizing of a solenoid coil. An inlet valve connected to the telescoping member and an outlet valve connected to the stationary member provide a unidirectional fluid flow through the telescoping cylinder assembly with the reciprocation of the telescoping member. The outlet valve has a flat valve member which is biased against a valve seat provided at the end of the stationary member adjacent to the outlet port. The flat valve member is preferably made from a resilient elastomer which increases the efficiency of the pump and eliminates forward and back syphoning.

Abstract: A dosaging pump which can be placed, in particular, on bottles or the like, having a pump bellows and two valves, one of which is associated with the inlet side and the other with a nozzle. The nozzle-side valve-closure member is seated in the cover of a cap which grips over the pump bellows and the side wall of which is guided on the wall of a cup which surrounds the pump bellows, the inlet-side valve-closure member being seated in the bottom of the cup which is formed with an air-inlet opening. End folds of the pump bellows are seated on separate collars of the cup and the cap, and the end folds extend into outwardly directed protruding base support rings. A cup-bottom side of the base support rings has a sealing lip extending over the air-inlet opening in the cup bottom and the lip has a free-standing lip section resting against an inner wall of the cup.

Abstract: An air-operated reciprocating pump is designed for use with a wide variety of materials having widely varying viscosities. The pump has a stroke which is adjustable so that the piston can operate either entirely within the cylinder or can extend out the bottom end of the cylinder at the end of the stroke for materials having an extremely high viscosity. The stroke adjustment is easily accessible in the area between the pump and the air motor.

Abstract: A multicylinder, improved mud pump is disclosed, the preferred embodiment incorporating a hydraulically powered piston in a cylinder which connects with a piston rod which, in turn, drives a second piston in a cylinder adapted to pump mud. The first piston is driven by fluid from a rotary distribution valve, with the distribution valve being driven independently from the movement of the piston; also, the piston can be driven on its return stroke by entrapped fluid routed from a second cylinder, or the piston can be driven on its return stroke by fluid routed from the valve. Additinally novel valving means is disclosed for the rotary distribution valve and novel hydraulic drive circuitry is disclosed, also novel mud pumping valve and piston arrangements are disclosed.

Abstract: A positive-displacement single-acting down-hole reciprocating pump for excavating and conveying to the surface accumulations of sand and other detritus that collects at the bottom of producing oil, gas, geothermal, and water-supply wells. The down-hole sand pump is activated by the axial oscillation of a steel cylindrical weighted momentum unit, which, in turn, is axially oscillated by a string of light-weight composite pipe, which in turn is axially oscillated at the surface. The sand and other detritus, along with the circulation fluid, is drawn into suction ports in the down-hole sand pump, and is conveyed upward through the pump, through the weighted momentum unit, and through the light-weight string of composite pipe to the surface.

Abstract: A vibrating compressor comprising an external iron core, a permanent magnet, an internal iron core, and an electrocmagnetic coil vibratably supported by a mechanical vibrating system in a magnetic gap between the two iron cores to drive a piston connected thereto; the permanent magnet being composed of a high residual (remanence) magnetic flux density magnet, as represented by an alnico magnet, and a high coercive force magnet, as represented by ferrite magnet, and disposed separately.

Abstract: A fluid medium pump includes a piston having a hollow interior for receiving a connecting rod adapted to open and close a passage through the piston selectively in accordance with the stroke of the rod. User apparatus includes the pump and various pump heads for effecting spraying, foaming and container pressurization. Control mechanism for pump operation renders the pump inoperative for transport, selectively operable upon triggering or continuously operable.

Abstract: A pump recovers viscous fluid from a well area defined by a casing extending downwardly into the well. The pump includes a stationary sleeve disposed within the casing and a tubing disposed within the sleeve and reciprocatable upwardly and downwardly within the sleeve and defining a first closure within the sleeve near its bottom end. A first member is disposed on the tubing in slidable relationship to the tubing and a second member is disposed within the sleeve in co-operative relationship with the first member to define a first valve having open and closed positions. The first and second members are disposed above the first closure to define a pump chamber with the first closure. The tubing is spaced from the sleeve above the first valve to define a storage chamber with the first valve. Means define a second valve with the sleeve at a position below the first valve and have open and closed positions.

Abstract: A multicylinder, hydraulic driven, dual arranged mud pump is disclosed. The preferred embodiment consist of dual mud pumping units arranged to be selectively operated as individual pumps, as two pumps whose output flow is in parallel, or as two pumps whose output flow is in series. Each mud pumping unit is comprised of plural pumping assemblies with each assembly consisting of a pair of separate end to end cylinders, one cylinder being arranged to be driven by a second cylinder with the one cylinder further being arranged to pump mud and the second cylinder being arranged to be reciprocally driven in a sequential manner by pressurized hydraulic fluid.

Abstract: A multicylinder, double acting improved mud pump is disclosed, the preferred embodiment incorporates a hydraulic powered piston in a cylinder which connects with a piston rod which, in turn, drives a second piston in a cylinder adopted to pump fluid mud. The first piston is driven by hydraulic oil delivered under pressure to intake manifolds through an independently driven valving apparatus which times the delivery of the hydraulic fluid for the main power stroke and further times the discharge of the hydraulic fluid for the return secondary power stroke, the system being controlled independently of piston action in timing of multiple pistons in multiple cylinders by the valve system. Additionally an intake valve delivers fluid mud at lower pressure on the intake side of the mud compression piston, and an outlet valve traverses with the piston rod to direct the outlet mud flow.

Abstract: A motor fuel feed pump with a tappet operated piston or membrane wherein the tappet is linearly guided and sealed in a housing segment which projects into the cylinder chamber of the pump on its suction side or its pressure side with inlet and outlet means positioned such that the motor fuel flows around and in direct contact with the projecting housing segment.

Abstract: The hand-operated pump has a piston which is reciprocated within the hollow pump body by a plunger which itself is reciprocated through an opening in a collar at one end of the pump body. When the plunger is in a fully extended condition at one end of a stroke, a direct seal is obtained between an annular projection on the plunger and an annular groove on the collar which receives said projection. Thus, leakage is prevented along the interface between the plunger and the collar through the opening during shipment or accidental inversion of the pump at other times.

Abstract: A pump type dispenser for dispensing a spray of liquid has a container for containing the liquid to be dispensed, a piston-cylinder device for drawing liquid out of the container and pressurizing it, a dispensing head into which the pressurized liquid is pumped, with a free piston chamber therein in which is a free piston spring loaded toward the direction from which the pressurized liquid comes, and a nozzle opening out of the free piston chamber through the dispensing head. A check valve between the piston-cylinder device and the free piston chamber blocks return of the fluid once it has been forced into the free piston chamber, so that the free piston acts on the liquid in the free piston chamber to dispense it in a spray through the nozzle while the piston-cylinder device recovers from its actuated to its unactuated position and the next actuation thereof is started.

Abstract: A deep well pump includes a cylinder having a foot valve and a valved piston which is movable over a given range in the cylinder. The cylinder is preferably formed of plastic, extends above ground and below the range of movement of the piston, and is of constant diameter over its length. The piston rod also extends above ground and is of variable length to vary the range of movement of the piston. The foot valve structure and piston structure are interchangeable and connected together during operation by a slackened cable.

Abstract: A liquid dispensing pump particularly designed for dispensing measured amounts of edible liquids such as molten chocolate into molds, that may be of varying capacities. The pump dispenses, from a filled pump barrel, on outward movement of a valved piston and the quantity dispensed is determined by the position of a stop pin in a notched tube that is moved in unison with the piston rod and pivoted stop plates that limit movement of the stop pin. The pump is readily disassembled for cleaning and is adapted for easy mounting on a tank.

Abstract: A finger-operated spray pump assembly adapted to maintain a seal against leakage under substantially all conditions normally encountered by the pump. The assembly includes a compression chamber, a piston slidable in the compression chamber, a stem slidable in the piston, and a seal member abutting the piston. The lower end of the valve stem contacts the seal member to open the seal slightly before the piston starts its downstroke. A closure member for the container to be used is permanently attached to the spray pump.

Abstract: To permit dry operation of a piston within the cylinder, the cylinder is made of metal, and the piston is made of polytetrafluorethylene; the piston, preferably, is formed with an annular ring groove extending downwardly from an end face thereof to leave a circumferential lip, the groove having a spring located therein biasing the lip outwardly against the cylinder wall, to provide for sealing contact of the lip against the cylinder wall, which is additionally reinforced by pressure of the gas being compressed by movement of the piston within the cylinder, tending to expand the lip against the piston surface, at the time when the compression is highest, and sealing is the most desired.

Abstract: A water well pump assembly designed for operation within a well casing and embodying a pump cylinder having the usual foot valve and traveling plunger valve, together with a novel head valve which is disposed at the upper end of the cylinder above the plunger valve and which functions when an excess quantity of air enters the cylinder through the foot valve to prevent the hydrostatic column of liquid in the liquid outlet pipe above the plunger from following the latter during its downstroke. By such an arrangement, the resultant partial vacuum which is established by downward movement of the plunger causes the foot valve to become seated and the traveling valve to become unseated so that upward movement of the plunger causes unseating of the head valve and passage of the excess air upwardly into the liquid outlet pipe.