Abstract: A slurry pump has a hopper containing slurry. A pumping cylinder containing a piston communicates with the hopper through the hopper wall. A delivery tube is swung into and out of register with the cylinder. Slurry is drawn into the cylinder by the piston and out through the delivery tube. The pump is controlled by a lever which has a central neutral position and two operating positions.Dangerous moving parts are covered by a guard mounted on hinges. An arm on the guard engages a slide which has a channel. If the guard is moved from its closed position, the arm slides the slide so that the control lever enters the channel and moves to its neutral position. The external moving parts include releasable clamping means for sealing the junction of the delivery tube and the cylinder while slurry is being transferred from the cylinder to the tube.

Abstract: A concrete pump comprises a water rinsing box, a valve housing and a pair of concrete pump cylinders there-between. The rinsing box and the valve housing are welded at opposite ends of rigid connecting means such forming a rigid undetachable structure in which the cylinders are removably fastened and can be drawn out through the valve housing after removal of a housing closure flap.

Abstract: A twin cylinder pump for viscous materials such as concrete, having a guide for a cutting ring producing a sealing effect on the cylinder and a seat for supporting a loaded spring ring of elastic material of rubber or the like, is so designed that the ring is acted upon by the pressure of the feed taking effect in the ring-like gap, open as far as supporting face or seat of the spring, between the cutting ring and the valve member. Furthermore there is a guiding and constraining means for the ring taking effect thereon between the radial faces against which it is rested.

Abstract: A fluid pressure operated actuator, for example for controlling operation of a pneumatically driven metering pump for liquids. In a specific embodiment, the actuator is a rotary actuator and includes a piston/cylinder unit coupled at one end to a rack and pinion drive for reciprocating a rotary control valve of the pump, and at its opposite end to a valve which controls the air supply to the main liquid delivery plunger of the pump. The coupling to the air supply valve is designed to allow limited lost motion at each end of the stroke of the piston so as to ensure that the rotary valve is turned before the plunger of the pump begins to move.

Abstract: An apparatus for oscillating a distribution duct between two outlets of adjacent pump cylinders and a common discharge pipe. A portion of the apparatus pivots with the discharge pipe and cooperates with a stationary housing to relieve thrust loads imparted during the pumping operation. A movable hopper is employed to feed material to the pumps and facilitate access to internal portions of the hopper for cleaning.

Abstract: A fuel injection pump is proposed in which the fuel metering during the intake stroke of the pump pistons of the fuel injection pump is effected via a pressure conduit, the cross section of which is controlled first by an electrically controlled switching valve and second by means of the control of a fuel supply opening of the pressure conduit by means of a control groove, which communicates with the pump work chamber and, as part of a distributor shaft, is guided in synchronism with rpm. By means of the oblique disposition of the control groove and the possibility of an electrically controlled longitudinal displacement of the distributor shaft, the angular position at which injection takes place can be embodied in an arbitrary manner in combination with a switching valve.

Abstract: A pump assembly has a hopper adapted to hold a wet concrete mass and having a front wall formed with a front port centered on a front axis perpendicular to the front wall at the front port and a rear wall formed with two rear ports centered on respective rear axes perpendicular to the rear wall at the rear ports and generally parallel to the front axis. Respective piston pumps secured to the rear wall outside the hopper over the rear ports are operable to draw portions of the mass out of the hopper and expel them back into the hopper through the respective rear ports. An outlet conduit is connected to the front wall outside the hopper over the front port and a distributor pipe in the hopper has a front end fitted and aligned with the front port and a rear end engageable over and alignable with either of the rear ports. A buttress formation fixed on front end of the distributor pipe defines outside the hopper a buttress plane parallel to the front and rear planes.

Abstract: A windmill energy system for extracting energy from available wind power comprising a windmill in combination with a compressor pump in an essentially closed loop system with the compressor pump including a tubular upper section having a cylindrical bore forming a piston chamber in which a piston is reciprocated and a lower section having a control chamber, a crankshaft assembly located in the control chamber for reciprocating the piston, a first and second passageway in the lower section, conduit means for interconnecting the first and second passageways with the piston chamber and a heat exchange medium and means rotatably mounted to the crankshaft assembly for opening the first passageway while closing the second and vice versa during consecutive discharge and suction strokes.

Abstract: A fuel injection pump is proposed which has a distributor in which both the injection quantity and the onset of injection are variable. The distributor is axially displaced via electric servomotors and is rotated relative to the drive shaft.

Abstract: The valve has a shutter mechanism which is movable within a housing and is provided at one end with at least one inlet which is movable across one or more housing openings and at the opposite end with an outlet surrounded by a sealed contact joint which is movable across a delivery pipe opening in the housing. This sealed contact joint surrounds the delivery pipe opening in the housing and contacts either the inside wall of the housing or a face plate arranged on the inside wall of the housing in all intermediate and final positions of the shutter mechanism. With the aim of reducing wear and producing a permanent seal, the sealed contact joint is in the form of a compressible sealing ring with a slotted or kidney-shaped cross-section which serves to wipe the flat and smooth face plate or inside wall of the housing.

Abstract: A two-cylinder pump for heavy flowable materials, such as concrete, comprising a shutter mechanism which is pivotable across an apertured face plate, the shutter mechanism being sealed against the face plate by means of a cutting ring which is axially movable relatively to the shutter mechanism and is supported thereon with its rear side engaging a rectangular-section flexible rubber ring, whereby the cutting ring is urged resiliently against the face plate, means for locating the cutting ring, along a portion of its length, on the shutter mechanism, a seating for the flexible ring on the cutting ring which includes an annular extension which partly overlaps the longer cross-sectional side of the flexible ring in the axial direction, a seating for the flexible ring on the shutter mechanism which includes an annular extension which partly overlaps the longer cross-sectional side of the flexible ring in the axial direction, said annular extensions partly overlapping the ring from opposite sides thereof so that

Abstract: A reciprocating food pump for pumping viscous edible material has the cylinder removably clamped to a base plate. The piston of the pump cylinder is actuated by a reciprocating, compressed air motor having a common piston rod connecting the air piston and pump piston. The air cylinder is pivoted to the base plate so that the pump cylinder may be unclamped from the base plate and moved upwards sufficiently to pull the cylinder away from the piston. A rotating plug valve is used on the end of the pump cylinder. The plug is held in place by a stem extending through a flat valve plate. A seal is placed between a sleeve on the end of the valve stem and the valve plate and another seal between the valve stem and the sleeve. Upon each suction stroke of the pump, the vacuum within the pump pulls the valve plug within the cylinder, which will be transmitted to the stem, and increase the pressure between the sleeve and the flat valve plate insuring a good seal upon each suction stroke.

Abstract: Disclosed is a displacement pump especially suited for use in very small well bores. The pump includes a piston working in a cylinder, driven by a rotating cam shaft having closed loop cams for effecting reciprocation of the piston. The rotating cam shaft carries spool valves for positive control of liquid flow into and out of the pumping chambers. Also disclosed is a transmission mechanism especially suitable for use in reducing the speed of an electric motor power source to a level suitable for driving the cam shaft. The pump includes a small diameter high speed electric motor, on which is mounted the transmission mechanism, which in turn carries the pumping mechanism. An electrical power conduit runs through the pumping mechanism and transmission mechanism to the motor.

Abstract: A compressor is provided which has a housing formed with a volume control chamber located in the vicinity of the discharge port and within which a valve is mounted, a first port communicating the volume control chamber with a pumping chamber defined within the housing, and a second port communicating the volume control chamber with the suction port. The valve is disposed so as to open selectively the first port alone or both the first port and the second port, to thereby make it possible to control the discharge rate of pressurized gas or interrupt discharge of same without interruption of driving of the gas pressurizing member of the compressor for compression of gas such as a rotor or a piston.

Abstract: In pumps for viscous substances, particularly pumps for concrete, with two feed cylinders (2) opening out into a hopper (1), which cylinders (2) alternately draw the material to be forwarded from the hopper (1) and press it via a swingable S-shaped tube (5), arranged within the hopper (1), into a delivery pipe, the swivel bearing is constructed in such a way that the pressure of the material to be forwarded is changed into an axial thrust force on the axially movably arranged swivel tube (5) whereby the contact pressure of a wear ring (20) is increased, to ensure a sealing abutment of the wear ring attached to the end of the swivel tube with the rear wall (44) of the hopper (1) including the outlets of the feed cylinders, which wall (44) may if necessary, be reinforced with a spacer (22), and to ensure uniform wear over the whole face of the wear ring (20).

Abstract: A viscous material pump, in particular for the conveyance of concrete through a housing (3) of a switch tube (2) has a swivel body (26) fastened on an axially supported pivot shaft (44). The swivel body alternately connects a discharge opening (25) mounted in a housing wall with two inlet openings (6, 7) arranged in another housing wall. The centers of the inlet and outlet openings, respectively, are arranged in radial displacement from the shaft axis (35). The displacement of the inlet openings (6, 7) and the discharge opening (25) from the shaft axis (35) differs and is so selected that the displacement (R.sub.1) of the inlet openings (6, 7) is larger than the displacement (R.sub.2) of the discharge opening (25).

Abstract: A piston pump installation, and method of operation the same, for conveying sludge-type materials and granulated and solid materials with added fluid, comprising one or more, preferably two, cylinders arranged adjacent and parallel to one another with axially reciprocating pistons therein. Each cylinder having a valve provided at its front end, and a drive and control device located at the rear, opposite end. The valve located at the front of each cylinder is structured as a slide valve or so that it can turn and is connected to a suction main on one side and to a delivery pipe on the other side, the suction main and the delivery pipe preferably being perpendicular to the longitudinal axis of the cylinder. Each valve having a valve body with an inlet orifice and a cutting edge as well as an overlapping surface. The inlet orifice in the valve body being designed as a flow connection between the suction main and the cylinder as well as between the cylinder and the delivery pipe.

Abstract: Concrete is transmitted from a hopper forming a part of a mobile concrete pumping apparatus to the deposit site through a flow line having a Y-pipe inlet. The pumping apparatus includes two piston-cylinder concrete pumps mounted in side-by-side relationship adjacent the hopper, which has an auger to rapidly charge a pump with concrete through one of two discharge pipes. Each pump is pivotally mounted, to locate the cylinder aligned with the discharge pipe or with one inlet of the Y-pipe inlet. Each pump has a valve plate pivoting with the cylinder to alternately close the hopper opening and the inlet line. Hydraulic cylinder units are coupled to the valve plates to pivot the pumps. A floating valve plate has coupling pipes attached to the hopper and a hydraulic cylinder urges the same into sliding sealing engagement with the rotating valve plate.

Abstract: A valve structure for a viscous material pump having a material reservoir, a pair of alternately operable material conveying cylinders, discharge conduit means, and a valve control means coupled to the valve structure and to the material conveying cylinders. The valve structure has a pair of movable swivel pipes extending between the conveying cylinders and the discharge conduit means. Each of the swivel pipes has an opening movable over one of the conveying cylinders to receive the contents discharged therefrom and a plate movable over said one conveying cylinder to block same.

Abstract: A tube filling and closing machine includes a material feeding device which comprises a container for the material to be packaged which opens into a cylinder in which a piston is movable backwardly and forwardly for taking in the material from the container and dicharging it out through a nozzle discharge into a package to be filled. The piston is moved by a connection to a piston rod which is connected to the piston and a valve is disposed between the filling line to the storage container for the material and a discharge line to a nozzle for filling the package. A mechanism is connected to the piston to change the stroke thereof for varying the quantity of material which is filled and this includes a lever arm which is connected to a fixed pivot at one end and its opposite end provides a journal for a rotatable shaft which carries a cam plate which is in engagement with a cam roller located at a fixed location.

Abstract: A spring loaded fluid operated valve for use in sensing the speed or rotation of a rotating member, shaft or collar is disclosed. The valve features fluid inlet, outlet and storage chambers, each of which have openings spaced from and selectively aligned relative to one another. A rotating body whose speed of rotation is to be sensed, slidably engages the chamber openings in a fluid tight manner and defines a slot or recess therein which communicates with each of the openings in a repetitive and sequential manner to alternately transfer a portion of the fluid introduced into the inlet chamber to the storage chamber and, thereafter, from the storage chamber to the outlet chamber. In the particular embodiment of the valve disclosed herein, the openings are disposed on a concave base of a housing containing the chambers so as to conform to the circular periphery of the rotating shaft or collar defining the slot. The slot rotates across each of the openings during each revolution of the shaft or collar.

Abstract: A pivotal pipe valve unit for concrete supply hoppers having a pair of concrete pumps of the piston-cylinder type which includes a shuttle valve pipe mounted within the hopper for pivoting about a discharge line. The inlet end is spaced slightly from a wear plate which encompasses the cylinder openings to the hopper and is pivoted for alternate alignment with the discharge opening from the pump cylinders. An outer base member is secured to the inlet end and has an annular recess receiving a wear ring. A hydraulic source is coupled to the chamber and creates a pressurized liquid backing of the ring. An annular seal with a metal backing is located to the backside of the ring. An accumulator tank is connected to the hydraulic supply system to firmly hold the ring in sliding sealing engagement with the wear plate with a cushioned type support. The wear ring is slightly thinner than the annular recess and may tilt such that the ring and wear plate sealing surfaces remain parallel.

Abstract: A piston pump for the transport of viscous materials and, in particular, concrete, includes a housing having defined therein an annular-shaped working space, a piston slidably mounted within the annular-shaped working space for oscillatory movement, and a pressure conduit and a suction conduit, each of which is communicative with the working space. The pump also includes control means having a member which is disposed in the annular-shaped working space for connecting the portion of the working space, which lies in front of the moving piston, to the pressure conduit and for simultaneously connecting the portion of the working space which lies back of the moving piston, to the suction conduit. In addition, the pump includes means for reversibly driving the piston so that it moves in an oscillatory manner in the annular working space, reversing its direction when it nears the member of the control means.

Abstract: A pump for conveying cement comprises two pump cylinders and reciprocating pistons, an input container, a multi-limb oscillating shutter valve arranged in front of the pump cylinders and below the input container, the housing of the valve including a suction connection leading from the input container, two ports connected to the pump cylinders respectively, and an outlet located in the end wall of the housing. Two inlet ports are provided in the housing for placing the suction connection in communication with the ports connected to the pump cylinders respectively. The oscillating shutter is mounted on a horizontal shaft to be movable between two positions, and includes two control limbs, each controlling a different one of said inlet ports, and an outlet control limb the forward edge of which passes over and controls said outlet.

Abstract: In a double-cylinder pump for conveying cement, a distribution pipe is pivotally driven into alignment with each of the cylinders in turn. A wearing ring, which provides a seal between the end of the pipe and the cylinders, is mounted so as to be movable with respect to the end of the pipe so as to be able to assimilate wear.

Abstract: A pump and valve arrangement includes a three-way valve at the juncture of an inlet line, an outlet line and a pumping chamber. The valve comprises a generally spherically shaped flow control member rotatable in a valve body and having an arcuate slotted passage in one side thereof adapted to communicate simultaneously with either the inlet line and pumping chamber or the outlet line and pumping chamber for alternate flow of material from the inlet line into the pumping chamber and then from the pumping chamber through the outlet line. Adjustable seat sleeves extend into the body into sealing engagement with the flow control member and a journal of the flow control member extends outwardly of the valve body and has a quick release crank attachment thereon. The pump and valve are operated in synchronism with one another by respective motors controlled from position responsive switches.

Abstract: Disclosed is a displacement pump especially suited for use in very small well bores. The pump includes a piston working in a cylinder, driven by a rotating cam shaft having closed loop cams for effecting reciprocation of the piston. The rotating cam shaft carries spool valves for positive control of liquid flow into and out of the pumping chambers. Also disclosed is a transmission mechanism especially suitable for use in reducing the speed of an electric motor power source to a level suitable for driving the cam shaft. The pump includes a small diameter high speed electric motor, on which is mounted the transmission mechanism, which in turn carries the pumping mechanism. An electrical power conduit runs through the pumping mechanism and transmission mechanism to the motor.

Abstract: A valve means for changing over concrete material passage is disclosed, wherein a rotational frusto-conical valve body is provided in a hopper. The interior of the valve body is provided with curved circular concrete material intake and discharge passages, the openings of which are alternatingly communicated with openings of double cylinders having pistons therein by rotating the valve body. The other end of the discharge passage is rotatably connected to a pipe to supply the concrete material into the outside of the hopper.

Abstract: A dilution system which employs hand manipulated microdispensers including a power actuator for discharging diluent from one or more microdispensers through a flexible conduit to a remote handle carrying a sample microdispenser and a control for the actuator arranged for single-handed dispensing of a sample and diluent.

Abstract: In a multi-cylinder pump for conveying concrete, the flow of concrete to and from the cylinders is controlled by a pivot body containing a pressure channel. The pressure channel is bounded by blades, each of which has a blade plate shaped in accordance with the flow of material and sealed to the pump casing wall at its edges. Each blade also has a base whereby it is attached to the pivot body shaft.

Abstract: A distributing valve for twin cylinder pumps for pumping viscous materials such as concrete, has an oscillating body with closing elements, for the suction orifices and pressure orifices for the pump cylinders mounted on a shaft disposed outside the part of the pump casing acted upon by the pump pressure. The closing elements are arranged on the same side of the rotating shaft and a pair of closing elements is provided either for the suction orifices or for the pressure orifices.

Abstract: This disclosure relates to a pumping apparatus that includes a hopper for receiving concrete with a delivery line extending from the hopper and a cylinder cooperating with the hopper to deliver concrete to the delivery line. A valve has an outlet end connected to the delivery line and is pivoted within the hopper between two positions to alternately connect the cylinder to the delivery line and to the hopper for delivering concrete to the delivery line and then withdrawing concrete from the hopper for subsequent delivery. An adjustable wear plate is located adjacent the inlet end of the valve so that continuous contacting engagement can be maintained between adjacent surfaces of the valve and the plate. The valve also has rigidifying means associated therewith and is supported on the hopper in a manner to prevent distortion during movement thereof.

Abstract: The cylinders of two plunger-type slurry pumps on a truck delivering concrete mixture to a constructions site are connected to openings in the bottom of a bin and alternatively connected to a discharge conduit by a tubular connector movable in the bin between positions of at least approximate sealing engagement with the openings. The useful life of the connector and of associated devices is improved by supporting the connector on a rigid frame above the bin.

Abstract: A system for metering and pumping a plurality of fluids is diclosed. The system includes a pumping stage which has a plurality of piston pumps extending from a rigid support to a rack hinged at one end. A valve stage is provided having a valve body with an internal rotatable valve spool. The valve body has several sets of inlet, outlet and common ports communicating with the valve spool, the common ports being connected to the respective pumps. One set of ports is provided for such fluid to be metered and pumped. For each set of ports, the valve spool has a flat portion and a circumferential indentation integral to the flat portion. Alignment of a flat portion of the valve spool with an inlet port of the valve body allows fluid to pass from a supply to the respective pump, and alignment of the flat portion with an outlet port allows the fluid to pass from the pump and out through the outlet port.

Abstract: An improved valve assembly providing a constant flow of semi-fluid concrete material through a concrete-pump assembly having a hopper to receive the concrete material and a plurality of hydraulically-actuated concrete pumps operably communicating with the hopper through inlet ports disposed in one wall of the hopper, the valve assembly being operably mounted within the hopper to oscillate therein. The valve comprises a main conduit for selective communication with the inlet ports, and a second conduit connected to the main conduit at one end thereof, the opposite end thereof being rotatably supported in the hopper wall and adapted to be connected to one of the hydraulic pumps. The main conduit together with the second conduit form a substantially Y-shaped configuration whereby the valve oscillates about the axis of the second conduit.