Abstract: A selective drive transmission system for continuous ink jet printing apparatus of the type having a plurality of discrete ink circulation subsystems, each including an ink supply, a print head for directing droplet streams toward a print medium and pump means for pumping ink from its respective supply to its respective print head. The transmission system discretely couples and decouples the plurality of pump means discretely vis-a-vis a common motor source of the rotary drive.

Abstract: A pump system having a main pump and a plurality of subsidiary pumps each of which has a relatively low pressure compartment from which fluid may be pumped to a relatively high pressure compartment. The main pump preferably operates continuously, but each of the subsidiary pumps is inactive until such time as it is elected to be operated, whereupon high pressure fluid from the main pump may be directed to such subsidiary pump. The pump system is particularly adapted for use in conjunction with an automotive engine.

Abstract: A tandem pump arrangement is disclosed comprising a first pump having two meshing gears of different pitch diameter adapted to produce pumping action by their meshing engagement upon drive to the one gear having the larger pitch diameter and the drive thereby of the other gear having the smaller pitch diameter at a higher speed. A second pump has an input connected to be driven by the gear with the smaller pitch diameter with the result that the second pump is driven through the first pump at increased speed with an overdrive ratio determined by the ratio of the pitch diameters of the gears.

Abstract: A proportional mixing unit for accurately metering the desired amounts of a liquid concentrate and a liquid diluent, completely mixing the concentrate and diluent together, and holding the mixture until needed. A constant volume pump is used to pump a constant volume of the liquid concentrate. A pressure regulator maintains the liquid diluent at a constant pressure. A variable volume pump is used to mix the liquid concentrate from the constant volume pump and the liquid diluent from the pressure regulator and to pump a variable volume of the mixture to a holding tank. By varying the volume of the variable volume pump, the proportion of liqiuid concentrate to liquid diluent is accurately varied.

Abstract: The novel slave pump having a piston rod having a fluid passage through which catalyst is discharged for ultimate use. The slave pump also has an exterior casing which holds it together without contacting the catalyst or other fluids being pumped.A novel combination of a slave pump as just described driven by a master pump having a cylinder and a piston rod, a slave pump having a cylinder and a piston rod, a first means interconnecting the piston rod of the master pump with the piston rod of the slave pump, and a second means connecting the cylinder of the master pump with the cylinder of the slave pump.The position of the slave pump can be adjusted with respect to the master pump to change the amount of catalyst or other fluid delivered by said slave pump per stroke of the slave pump piston. The interconnecting linkages are provided with spherical connections to mitigate wear and binding due to misalignment.

Abstract: The apparatus consists of a plurality of piston pumps having preset displacement ratios. A motor mechanism is connected to each of the pumps. In addition, there is a control mechanism connected to each pump ensuring that all pistons execute their previous stroke completely before being reversed and that they all start their following stroke at exactly the same moment. Furthermore there is another control mechanism controlling the speed of each piston so that all pistons complete their respective strokes simultaneously. A mechanism for adjusting and varying the pump displacement is also provided.

Abstract: A variable-displacement rotary fluid compressor comprising first and second rotary compressor assemblies including respective rotor units rotatable about axes aligned with each other and first and second drive shafts respectively carrying and rotatable with the rotor units, each of the compressor assemblies having fluid inlet and outlet ports; a fluid inlet chamber communicating with the fluid inlet ports of the two compressor assemblies and a fluid outlet chamber communicating with the fluid outlet ports of the compressor assemblies; a first clutch assembly comprising a drive member which is rotatable about an axis aligned with the axes of rotation of the rotor units and which is to be driven by a drive source, a driven member rotatable with the first drive shaft and coupling means to couple the drive and driven members together when actuated; and a second clutch assembly comprising a driven member rotatable with the second drive shaft and coupling means to couple the respective driven members of the first a

Abstract: A multi-cylinder compressor 10 particularly useful in connection with northern climate heat pumps and in which different capacities are available in accordance with reversing motor 16 rotation is provided with an eccentric cam 38 on a crank pin 34 under a fraction of the connecting rods, and arranged for rotation upon the crank pin between opposite positions 180.degree. apart so that with cam rotation on the crank pin such that the crank throw is at its normal maximum value all pistons pump at full capacity, and with rotation of the crank shaft in the opposite direction the cam moves to a circumferential position on the crank pin such that the overall crank throw is zero. Pistons 24 whose connecting rods 30 ride on a crank pin 36 without a cam pump their normal rate with either crank rotational direction. Thus a small clearance volume is provided for any piston that moves when in either capacity mode of operation.

Abstract: A combination airless paint pump and air compressor wherein a prime mover drives an eccentric cam wheel within an oil reservoir housing. A piston, movably received within a housing bore is engageable with a periphery of the cam wheel to load an hydraulic column open to the piston cylinder for oscillating a paint spray pump diaphragm. A second piston member, received in a bore open to the housing, is engageable with the periphery of the cam wheel spaced circumferentially of the paint pump piston. The second piston is operatively connected with an air pump diaphragm. Selector means are provided to disengage, selectively, either one of the pistons from contact with the cam wheel whereby the unit can operate in a paint only mode, an air only mode or a combination air and paint mode.

Abstract: A portable positive displacement respirator/ventilator is provided for both a pressure sigh and a volume sigh of predetermined duration and frequency by providing a variable length crank arm connecting a piston through a connecting rod by mounting the connecting rod on a circular toothed gear, pivoting the gear for movement at its center and driven on its outer edge with a separate motor driven pivot gear which when moved relocates the effective length of movement of the point of attachment of the connecting rod thereby changing the volume swept by the piston for the same arc of reciprocal movement of the larger circular toothed gear enabling both a volume change or a volume sigh with the device. A cooperating multiplicity of adjustable pressure regulating valves where at least one can be intermittently closed during the operation of the device regulates ventilation pressure or breathing pressure and sigh pressure.

Abstract: A multichannel pump wherein the flow rate through each channel can be independently adjusted. In one embodiment there is a frame composed of upper and lower disc-shaped members which support a shaft in the center and a plurality of tube holders around the periphery. An eccentric cam is carried on the shaft and sequentially contacts resiliently deformable tubes in the respective tube holders. Each tube holder is independently adjustable toward and away from the path of travel of the cam and each can be removed for replacement or repair without affecting operation of the remainder of the apparatus. Also included are structures permitting the use of tubing having a low degree of elasticity, such as Teflon and the like. In another embodiment there is one or more cassette-like pumping units each of which contains two independently adjustable channels. The cassette-like units are so constructed that any reasonable number of the units can be combined to provide a multichannel pump having as many channels as needed.

Abstract: A compact and highly reliable proportioning pumping system for supplying a precise and controllable mixture of concentrate and water in a kidney dialysis machine comprises a central body and a pair of oppositely mounted pivotable linkages coupled to the body. A first pivotable linkage is coupled by connecting rods to a water metering piston and a concentrate metering piston respectively, a variable stroke ratio being provided by a signal actuated drive coupled to the linkage mechanism and controlling the relative position of the end of one of the connecting rods. The change of position is advantageously effected so as to maintain a precise proportionality between the flows delivered by each of the pistons throughout their variable stroke lengths. The range of proportioning adjustments can be mechanically limited and alarm conditions can readily be detected.

Abstract: A valve chamber connected to the inlet of a ram pump has an inlet connected to a source of sludge and a substantially smaller inlet connected to the outlet of a metering pump.A valve seat in the valve chamber has a ball resting freely thereon, and an operative connection between the ram pump and the metering pump synchronizes the suction stroke of the ram pump with the discharge stroke of the metering pump to cause the incoming sludge to lift and spin the ball and thereby mix the sludge with the incoming additive.

Abstract: An improved fuel supply apparatus includes a booster pump assembly which is disposed in a fuel tank of an aircraft and is operable to supply fuel to an engine. The rate at which fuel is supplied by the booster pump assembly varies with variations in the demand for fuel by the engine. The booster pump assembly includes a pump having a small volumetric discharge capacity and a second pump having a large volumetric discharge capacity. An electric motor is provided to continuously drive the small pump. A fluid coupling is engaged to connect the large pump with the motor when the discharge pressure from the small pump decreases in response to an increase in demand for fuel by the engine. To engage the fluid coupling, a control assembly directs a flow of fuel to a space between input and output elements of the coupling. When the output pressure from the small pump increases due to a decrease in demand for fuel by the engine, the fluid coupling is drained to disconnect the large pump from the motor.

Abstract: A hydraulic pressure producing system including clutch means located between an output shaft of a motor and a rotary pump arranged in a liquid and operated from outside. The rotary pump is driven only when the clutch means is engaged to obtain a discharge pressure.

Abstract: A dosing system for one or more fluent materials, such as the components of an epoxy resin, has a support carrying a lever to which are attached at different locations the piston rods of one or more independent master cylinders. Respective conduits connect these master cylinders to respective slave cylinders in turn connected to respective stroke-type dosing pumps. The intakes of those pumps are connected to respective supplies of fluent materials and the outputs are connected to a common mixing recipient. A power cylinder connected between the lever and the support can therefore operate the master cylinders jointly to synchronously operate the respective slave cylinders and pumps to deliver to the mixing recipient volumes of the respective materials that form a ratio corresponding to that of the distances between the attachment locations for the respective master-cylinder piston rods on the lever and the pivot.

Abstract: Apparatus for delivering highly viscous liquids from a pair of containers for mixing together, including a metering pump mounted on each of the containers, an air motor connected to one of the metering pumps, a master hydraulic cylinder connected to the air motor and a slave hydraulic cylinder connected to the other metering pump such that as the air motor drives one of the metering pumps in a stroke, the hydraulic cylinders move the other metering pump in its stroke.

Abstract: Dispensing apparatus with a pain of fluid dispensing cylinders each having a piston driven through a separate differential transmission with two inputs. One of the inputs of both transmissions is driven by a first electric motor. The other inputs are connected to counterrotating output shafts of a gear box driven by a variable speed second electric motor to introduce unlike inputs into the differential transmissions so that the ratio of fluid dispensed by the cylinders is varied by operation of the second motor in different directions and at different speeds. During the return stroke of the pistons the second motor is operated at a rate higher than its rate during the dispensing stroke so that any difference in the length of the dispensing stroke of the pistons is reduced to zero before the pistons home, whereupon the second motor is de-actuated and the first motor alone homes the pistons to prevent the pistons from getting out of phase.

Abstract: Apparatus for metering material and transferring it from one location is provided. The new metering apparatus has several advantages over that disclosed in my U.S. Pat. No. 4,118,799. The apparatus includes a pair of cylinders with rams which are reciprocated in opposite directions by gear racks connected thereto and driven by a common pinion. A plurality of pairs of the cylinders and rams can be mounted on a common frame or base to meter a number of different materials. Also, the rams, with or without the cylinders, can be readily replaced with components of different diameters to provide different metered quantities of materials. In addition, mechanism are provided for changing the stroke lengths of one or more pair of rams when two or more pairs are employed.

Abstract: A multiple component applicator system for simultaneously metering a plurality of flowable materials and for delivering the metered quantities in predetermined proportions to a mixing device wherein the flowable materials are mixed and then dispensed. The system includes an improved metering and proportioning device as well as an improved modular control system for facilitating rapid interchangeability of the flowable materials being dispensed from the apparatus.

Abstract: A pump unit includes two main variable displacement axial piston pumps with coaxial input drive members. A power input shaft to the pump unit is mounted for rotation in the housing along an axis perpendicular to the common axis of the main pump drive members. A first bevel gear mounted within the housing on the power input shaft meshes with a second bevel gear which is rotatable about the common axis of the main pump drive members and drivingly connected with at least one of the pump drive members. The housing has at least one flange defining a surface on which an auxiliary pump may be mounted. The auxiliary pump has an input shaft which extends through an opening in the housing defined by the flange. A third bevel gear is mounted on the auxiliary pump input shaft from inside the housing and meshes with the second bevel gear.

Abstract: A metering and conveyor arrangement for liquids to be mixed, in which several parallel-connected delivery pumps are actuated by a drive unit. Each liquid is assigned to a pair of delivery pumps. Each pair consists of two piston pumps alternately performing an intake and a discharge cycle. The pumps are moveable relative to each other, as well as perpendicular to the piston rods. A swivel element is joined to the drive unit, and rocker arms are located on both sides. Each of the rocker arms is connected with one of the piston pumps of a pair, and the ends of the piston rods are located and guided in grooves of the rocker arms. Each pair of the piston pumps is regulated by an adjustment spindle which is common to one pair of piston pumps. The adjustment spindle has two parts with opposite threads. They are connected by a lockable coupling. One spindle part is each associated with one piston pump of one pair.

Abstract: A fluid transmission which includes a hydraulic pump combination and a hydraulic motor. The hydraulic pump combination includes a first pump which is a variable volume, variable direction pump and a second pump which is a constant volume, constant direction pump. The combined outputs of the first and second pumps are directed to a hydraulic motor at variable rates and in reversible directions.

Abstract: A machine for metering and mixing two or more liquids, which are rapidly reactive to form a solid polymer, immediately prior to the injection of the liquids into a molding machine. The machine is characterized by two or more metering cylinders into which the liquid reactants are introduced from supply sources and ejected in stoichiometric ratio into a mixing head for injection into a molding machine. The machine is capable of both incremental and continuous variation of stoichiometric ratio. The first is achieved by provision of removable cylindrical liner sleeves of varying inside diameter and corresponding pistons for the mixing cylinders. The latter is achieved through the use of a movable fulcrum lever arm to control the stroke of the piston of at least one of the metering cylinders. The mixer head is characterized by a mixing chamber, a plurality of impingement jet nozzles oppositely spaced and the flow from which is characterized by Reynolds numbers exceeding about 120.

Abstract: A high pressure liquid pumping system having means for selecting multiple output pressures and capacities and comprising a motor with a pair of pumps operatively coupled thereto. Each pump is coupled to the motor by a separate coupling means, with one pump being normally drivably coupled to the motor, and with the second pump being intermittently coupled to the motor.A first selector switch means engages the motor, while a second selector switch means is utilized to energize a clutch to couple the second pump to the motor when higher output pressures and capacities are desired.

Abstract: A manually operable hydraulic actuator which utilizes a main pump and an auxiliary pump to quickly develop a relatively large useful hydraulic force, for example, in applying compression accessories to stranded conductors such as cables. The main pump develops a relatively high pressure from a low volume of hydraulic fluid to develop the primary hydraulic force. The auxiliary pump develops a relatively low pressure from a high volume of hydraulic fluid to produce rapid advancement of a force-applying piston relative to a work piece. Both the main and auxiliary pumps are operated by the opposed swinging movement of two manually operable handles. One of the handles is selectively movable between a first position for simultaneously actuating both the main and auxiliary pumps and a second position for actuating the main pump only. A pressure relief system is provided to ensure development of the maximum rated pressure of the force-applying piston before retraction thereof can be effected.

Abstract: A reversible power transmission for transmitting input power supplied from either direction. The transmission comprises in combination a plurality of fluid power units for driving or receiving power from a first plurality of fluid actuators. The first plurality of fluid actuators are timed together for cooperating in a mutually complementary manner to substantially linearize a normally pulsating power transfer. The first plurality of actuators may be connected to additional actuators for providing or receiving rotary motion or to plungers operating within stuffing boxes for constant flow pumping or fluid power transfer.

Abstract: A pair of metering pumps are fixedly supported on a mounting frame and are driven in tandem by a reciprocable thrust mechanism for driving the piston or cylinder element of the pump. The thrust mechanism is movable transversely to the reciprocating direction and is supported on a frame. Two levers have respective ends linked to the thrust mechanism and to the frame, respectively. One of the reciprocable pump elements is suspended on a respective lever whereby reciprocation of the thrust mechanism causes corresponding reciprocation of the suspended pump element. The levers are held stationary with respect to the thrust mechanism and the suspension of the reciprocable pump elements holds them stationary with respect to the mounting frame.

Abstract: A metering pump for dispensing liquid having a pair of bellows type positive displacement pump chambers having different displacement volumes and interconnected in parallel to common inlet and outlet passages and a pair of independently controllable drive mechanisms for selectively interconnecting said pumps with a common power source for reciprocally activating each pumping chamber for a selected number of displacement cycles.

Abstract: A hand drive for manually operating a blender-type gasoline dispenser in the event of power disruption, including a crank operated shaft mounted for rotation and which is axially presettable relative to the pump drives for selectively operating either or both of the dispenser pumps. Laterally extending from the shaft are a pair of spaced pins for rotatably coupling the shaft with the drive sheave of the selected pump or pumps. Presetting the shaft axially with the pins in a first position rotatably couples the shaft via one of the pins to one sheave for high octane dispensing while the other pin and respective sheave remain disengaged. Setting the shaft in a second position rotatably couples the shaft via the other of the pins to the second sheave for low octane dispensing while the first pin and respective sheave remain disengaged.

Abstract: A fluid metering apparatus having paired cylinders, pistons and piston rods. The piston rods are connected to a lever or walking beam which, when pivoted at its center equidistant between the rod connections provides controlled equal travel distance and rate for the pistons providing equal cubic displacement in the cylinders. When the beam is pivoted off-center closer to one rod connection than to the other, the piston on the closer rod travels a shorter distance at a slower rate than the other piston providing unequal cubic displacement in the cylinders. In either case the quantities are measured proportionally to one another in the same period of time. The system is controlled by air cylinders and valves actuated by the reference piston rod. Telltale indicators are carried by the air cylinders to visually show any malfunction at each air cylinder individually. Automatic system operation is provided for continuous metering.

Abstract: A high pressure positive displacement gradient pump for two flowable materials utilizing two reciprocating pistons with the pair of pistons pumping in an overlapping reasonably pulse free manner. The gradient of the two flowable materials is created by adjustment of the stroke of each piston. Streams for the pair of pistons are combined and mixed in a mixing chamber. A third pair of pistons may deliver the mixed stream at high pressure to the desired location.

Abstract: Pumping unit for extracorporeal haematic circulation, in artificial kidneys, comprising an adjustable speed motor arranged to drive a pair of pumps of the peristaltic type by way of a transmission system. The pumps are able to be coupled alternately to the transmission system by means of two respective electromagnetic couplings.