Abstract: A portable hand-held concrete, mortar and gypsum mixer comprises a small gasoline powered implement having a drive shaft extending generally downward from the handles to a gear box. A transverse shaft driven by the drive shaft extends to either side of the gear box. Mounted on the transverse shaft are a plurality of blades shaped to thoroughly agitate and mix a combination of water and the ingredients for concrete, mortar, gypsum or similar heavy, hard to mix materials. Surrounding the blades are thin rings attached to the blades to form a round circumferential surface about the blades and thereby prevent the blades from directly contacting the mixing trough or other means of containing the mix. In the alternative, the plurality of blades may be shaped at their peripheries to form substantially continuous circular circumferences.

Abstract: In an apparatus for mixing foundry mould substances, in particular sand and binding agent, comprising a mixing tool which projects from a drive shaft and which is rotatable therewith in a container, fitment bodies (30) of small lateral extent (a, d) project from the wall (12) of the container (10) at a spacing in parallel relationship to the shaft from the free end (29) of the rotatable mixing tool (24).

Abstract: A material blender mixer is mounted to a chassis of a vehicle. The mixer includes a first material holder bin mounted to the vehicle chassis, a second material holder bin mounted to the chassis positioned reawardly of the first material bin, a device for dispensing the second material from the second material holder bin, a cross auger attached to the chassis and disposed beneath the dispensing device and a mixing auger in fluid communication with the cross auger. A conveyor extends through the first material holder bin and has a dispensing end in fluid communication with the cross auger. A device for agitating the first material in the first material holder bin is provided and includes a vertical agitator and a horizontal agitator, wherein fingers are disposed in both of the agitators adapted to agitate material held in the first material holder bin. Further, a method for preparing a settable material is disclosed, including use of a moist class F fly ash and a dry class C fly ash.

Abstract: A mobile concrete remix and transfer device includes an elongate open-topped surge bin, a remixing and transfer agitator rotatably mounted in the bin to move concrete toward one end, and an upwardly inclined discharge screw conveyor mounted in one end of the bin to transfer concrete therefrom to an upper discharge end near the upper edge of the surge bin. The device is particularly useful for direct or shuttle transfer hauling within the close confines of tunnel construction in a manner in which concrete can be loaded into and discharged from the bin at points directly adjacent the open upper edge thereof without the need for vertical lifting or tilting adjustment of the bin. The device may also be skid-mounted and positioned directly on the ground, loaded directly from a low discharge height truck mixer, and discharged directly into a concrete pump hopper, bucket, or the like.

Abstract: Quick-disconnect couplings for three-piece rotors in a two-rotor continuous mixer for plastic materials enable a main rotor section (or "main rotor body") of each rotor to be uncoupled from a drive journal located at one end of the main rotor section and a driven journal located at the other end of the main rotor section.

Abstract: An apparatus for making insulating cellular concrete consists of one or multiple mixing tanks. The multiple tanks are connected in tandom to a common pressure fed pump (6) via a valved (8) manifold (10). These simplified apparati can be trailer mounted (12), allowing for easy transport. A special blade assembly (14), water heating device (16), and check valve (20) allow for versatility, improved quality of concrete, and economy.

Abstract: Process for manufacturing walls from earth and sand mortars includes making a mortar mixture containing a dry aggregate mass of between 15 and 50% by mass of earth and between 85% to 50% by mass of sand, bonding materials in a mass of at most 10% of the dry aggregate mass, and water in a mass of at most 22% of the total dry mass of earth, sand and bonding materials, stirring the mixture continuously and transferring while stirring the mixture by force into an inlet of a pump, and pumping the mixture from the pump and projecting the mixture within a framework against a vertical projection support and allowing the mixture to set.

Abstract: Method for manufacturing concrete by mixing concrete materials including a cement, aggregate, admixture and at least one of water and ice. The aggregate is moved prior the mixing and a low-temperature liquid is sprayed on the aggregate for cooling while the aggregate is being moved.

Abstract: A paddle shaft assembly for a mixing apparatus including a quickly and easily removable quill shaft provided with a unique seal structure associated with the shaft and a unique mounting and handle structure to enable disassembly of the shaft in relation to a mixer drum and paddle assembly in the drum. The removable shaft is provided with a flanged end plate having keyhole slot connections to a flange on the end of a rotatable sleeve sealed in relation to the drum for removably supporting the shaft and a loop type handle attached to the end plate to facilitate manipulation of the end plate and shaft to remove and replace the shaft. A seal assembly is associated with the shaft, rotatable sleeve, end plate and flange to seal those areas of the shaft and sleeve to preclude passage of the material being mixed into the area between the shaft and rotatable sleeve, and between the flange and end plate.

Abstract: A removable three-piece paddle shaft assembly (30) for use in a mixing machine such as a mortar mixer (11) is disclosed. Three-piece paddle shaft assembly (30) includes paddle shaft drive spindle (31), main paddle shaft (32), and a paddle shaft supporting spindle (33). Main paddle shaft (32) is coaxially coupled at its ends to paddle shaft drive spindle (32) and the paddle shaft supporting spindle (33) using a pair of removable coaxial couplers (35). Removable coaxial couplers (35), here each consist of a spline type connection and a cooperating coupling nut (38). Coupling nuts (38) are provided with radially extending hammer protuberances to facilitate rotation of the coupling nuts using only a hammer. Complete removal and reinstallation of main paddle shaft (32) can be accomplished without disassembly of cylindrical mixing drum (12) or double-action bearings (15) and (16).

Abstract: A drum mixer is disclosed which is useful in the continuous production of asphalt paving composition. The mixer includes a hollow drum which is mounted for rotation about an inclined axis, and the aggregate is introduced into the upper end of the drum so that the drum rotates, the aggregate cascades through the interior of the drum and moves toward a discharge outlet at the lower end of the drum. A burner is mounted adjacent one end of the drum so that a heated gas passes through cascading aggregate. To permit the temperature of the exhaust gas to be maintained within acceptable limits so as to avoid detrimental effects to a downstream filtering baghouse, there is provided a gas flow bypass tube which is mounted coaxially within the drum. The tube may be selectively opened and closed, and upon opening the bypass tube, a portion of the heated gas is able to pass freely through a portion of the length of the drum and to the exhaust duct, without passing through the cascading aggregate.

Abstract: A mixer (10) consisting of a stationary casing (9), into which the outlet end (2b) of a rotary drum (2) opens, and mixing vanes fixed to the casing of the drum (2) and extending this casing axially in the direction of its outlet (2b). A burner (13) having an elongate body (12) projects into the drum (2) at its outlet end (2b) and opens into a flame zone (22). A recycling ring (32) is arranged around the drum (2) in the vicinity of the end (12a) of a burner. The casing (9) of the mixer delimits a mixing zone (36), separate from the flame zone (22), around the body (12) of the burner.

Abstract: A burner (13) and a conveyor (6) for aggregates (7) into the drum (2) penetrate into the drum at opposite ends (2a, 2b). Circulation of the gases inside the drum occurs in direction opposite to circulation of the aggregates. The burner has an elongated body (12) arranged in the axial direction of the drum. The drum comprises, from the inlet end (2a) to the outlet end (2b), a drying zone (21), a flame zone (22), a zone for introducing recycled mixes (23') and a heating and mixing zone (23). The device may be associated with a mixer (42) of the conventional type in which the bituminous products (11) leaving the drum (2) are mixed with liquid bitumen and worked. The invention enables coated products for road surfaces to be prepared without the production of bitumen vapor.

Abstract: A modularly constructed, trailerable, skid mounted, multi-compartmented concrete mixer and cement storage silo having a plurality of longitudinally aligned, bottom mounted, driven feed chains. In a combination construction, a single motor is cooperatively coupled to the feed chains of each mixer compartment and the feed chain of the cement silo to feed the cement/sand/aggregate in metered quantities to a turreted, separately powered auger where water is added and along the length of which the concrete is mixed. A silo vent column includes a plurality of fabric collection filters and means for vibrationally removing and reclaiming the cement. Air infiltration ports mounted along the bottom of the cement silo and one or more vibrators mounted to the mixer adjacent the sand and aggregate bins prevents crusting. Alternatively, the silo may be self-powered, and/or the mixer and silo may be transported independent of one another and/or without the trailer.

Abstract: A concrete mixer is disclosed having a mixing drum and a drag body is mounted in the drum which has a drag surface positioned to at least partially come into contact with concrete in the drum during a measuring phase in the concrete mixing operation. A hydraulic driving circuit is provided to oscillate the drag body at least during the measuring phase. A pressure sensor is connected in the hydraulic driving circuit for measuring the actual pressure value in the hydraulic driving circuit which is indicative of the flow resistance on the drag surface during the measuring phase of the mixing operation.

Abstract: A horizontally oriented mortar mixing drum 11 fabricated of polyethylene material having an elemental cylindrical segment opening through which mortar materials to be mixed may be deposited into or poured from. A perimeter frame having base elemental frame member 15, diametric wall frame members 16 and polyethylene grate 20 is provided for enhancing resistance to torsional stress on drum 11. Wear resistant liner 12 and side panels 13 and 14 cover the interior surface of drum 11. Paddle shaft 18 is rotatably and axially supported within drum 11 and has paddle stubs 28 attached to and extending radially therefrom. Polyethylene mixing paddles 19 are sleeved onto paddle stubs 28 to complete improved mortar mixing drum assembly 10.

Abstract: A concrete mixing apparatus including a paddle type mixer and a cement and water container mounted on a scale. The cement and water container is divided into separate cement and water compartments mounted above and upon the mixer to permit gravity flow of their contents through an open top portion of the mixer. Aggregate is supplied by a belt conveyor through a side opening. All ingredients are supplied by weight based on the indication of the scale. The scale includes load cells supporting the mixer. The arrangement provides flexibility in the manner of introduction of cement, water, and aggregate into the mixer.

Abstract: A blender vehicle apparatus includes a vehicle having a vehicle frame. An internal combustion engine driven hydraulic power package is mounted on the vehicle frame. A plurality of liquid additive storage tanks are mounted on the frame adjacent the power package. An operator's work platform, including a control station, is mounted on the vehicle frame adjacent the storage tanks on a side thereof opposite the power package. A hydraulically powered blender assembly is also included, and a hydraulically powered lifting apparatus is mounted on the vehicle frame for moving the blender assembly between a lowered position and a raised position. The raised position of the blender assembly is located above the vehicle frame and adjacent the work platform on a side thereof opposite the storage tanks.

Abstract: An apparatus and method of mixing concrete include a horizontally cylindrical mixing drum being loaded with concrete ingredients, agitating the ingredients by way of mixing elements rotating about a horizontal axis centrally located with respect to the mixing drum, rotating the mixing drum about the axis, such that an opening in the mixing drum is revolved to a horizontal elevation below the axis, and discharging the mixing drum by rotating the mixing element such that the mixing elements urge the contents thereof in the direction of and through the opening.

Abstract: A device for continuously preparing a hydraulically setting mass comprises a tubular housing having a downstream outlet opening and an upstream supply station for a dry component material of the mass, the supply station including a storage bin for the dry material. A driven rotating shaft extends from the storage bin through the tubular housing towards the outlet opening, rotation of the shaft causing a feed flow in the direction of the outlet opening, and the rotating shaft is equipped with a dosing screw feeding the dry material out of the storage bin, a plurality of radially projecting mixing blades for mixing the material fed by the dosing screw, and an implement for finely granulating the mixed material downstream of the mixing blades, the granulating implement being comprised of at least two interdigitating comb-like elements, one of the comb-like elements being carried by the shaft for rotation therewith and another comb-like element being affixed to the tubular housing.

Abstract: There is provided a mixer especially suitable for small batches of cementitious product comprising a receptacle and means for mounting a motor drivable paddle arrangement within the receptacle in such a manner that the paddle, while operating, can be moved manually to sweep substantially the entire volume of said receptacle.In preferred arrangement the paddle arrangement is powered by a portable electric drilling machine.

Abstract: A unit for moulding concrete mix, asphalt or other flowable material is disclosed which has a plurality of paddles mounted on a rotatable paddle wheel. The paddles compact and extrude the material into and through a mould box.

Abstract: Device for making of porous concrete intended for casting of e.g. elements of buildings, by which mainly cement, water and a frothing agent are mixed at the same time causing air pores in the mixture to be clasted, consisting of a cylindrical mixing-tank (1) in which an impeller (3) is arranged with a rotation axis which coincides with the center axis of the mixing-tank (1) and by which the impeller (3) includes blades (31) that extend helicoidally along the mixing tank (1) by which the helicoidally of each blade is less than 90.degree. over the length of the impeller (3) and by which the blades (31) extend a bit against the center axis of the impeller (3). Each blade (31) consists of two, in direction to the center axis of the impeller (3), reciprocally flat strips (32), which incline against the envelope to the mixing tank (1) so that the front edge in the moving direction of the outer strip (32) is located next to the envelope.

Abstract: An aerated cementitious composition is produced by feeding a mixture comprising cement and foaming agent to a mixing chamber open to atmosphere together with a feed of liquid. The ingredients are mixed and the wetted mixture pumped to a desired site, the capacity of pumping being greater than the feed rate of the ingredients into the mixing chamber such that air is drawn into the mixing chamber.

Abstract: A concrete mixer in this invention comprises an elastomeric lug belt carried by a first set of roller drums at least one of which is driven, the lug belt having a plurality of spaced elastomeric lugs thereon, and an elastomeric base belt carried by a second set of roller drums and depending between two of these roller drums to form a part-loop portion, at least one of the base belt roller drums also being driven to drive the lug belt past the base belt in a mixing zone in the part-loop portion, such that the base belt moves in the opposite direction from the direction of movement of the lug belt.

Abstract: A mixing and agitating device having an elongated container for holding liquid chemicals to be thoroughly mixed and dispensed has a pair of access holes for permitting entrance thereto, and a baffle structure midway within the container for separating same into two equal compartments. The baffle structure is provided with a plurality of six elongated apertures or slots, the upper three having the central one vertically mounted and the other two spaced on either side thereof at an angle of preferably 45.degree. from the vertical. The lower three slots have the central one mounted horizontally and the other two on either side thereof at an angle of approximately 45.degree. from the vertical. A modified embodiment is provided wherein the lower angled pair of slots are at an angle of 30.degree. from the vertical. However, the range of slot angles can be from 25.degree. to 55.degree. from the vertical.

Abstract: A method and device for preparing a wet concrete mix. An elongated tubular swirl chamber has a generally cylindrical shaped interior. A shaft extends axially in the chamber and is adapted for rotation at about 100 r.p.m. or higher. The chamber contains an inlet end for the introduction of dry particles pneumatically carried by a pressurized gas and an outlet end. Blades are arranged in several rows circumscribing the shaft so that the blades overlap to form a helical spiral to aid in moving the particles through the chamber. The blades in the helical spiral form a turbulent swirling distribution of particles traveling through the chamber when the shaft is rotated at 100 r.p.m. or higher and simultaneously the particles are forced by the pressurized gas through the chamber. A liquid is injected into the turbulent swirling distribution so as to wet the particles.

Abstract: A mobile concrete mixing apparatus comprising an aggregate storage bin and cement storage bin mounted on a mobile carrier in spaced relation, a water supply tank mounted on the carrier and in operable communication with a water discharge pipe disposed in the proximity of the cement storage bin, a conveyor apparatus movable beneath and between the aggregate storage bin and cement storage bin for moving materials therefrom for discharge into a mixing auger assembly, the aggregate storage bin containing premixed sand and rock materials for achieving a homogeneous moisture and temperature therebetween, the sand-rock mixture, cement mixture and water being mixed together prior to admission thereof into the mixing auger assembly, the auger assembly comprising a plurality of material moving stages and a plurality of mixing stages interposed therebetween to assure a homogeneous mixture for delivery from the mixing auger assembly, all of the operation of the concrete mixing apparatus being initiated by a single lever

Abstract: The invention relates to a concrete mixer truck having a rotatably driven mixer drum, particularly a drum provided with interior mixing elements, and a hydraulic system as a drive source for the mixing process.It is intended to enhance the effect of the mixing process by transmitting vibration energy to the mixture materials. To this effect, a vibration generator is included in the hydraulic system in such a manner that pressure pulses generated in the flow of the hydraulic fluid are superimposed on the mixing movement in the form of vibrations. This superposition effect may be achieved with respect to the rotation of the drum and/or with respect to the movements of a separate mixing tool.

Abstract: Apparatus for mixing charges of flowable solid materials has a hollow cylindrical housing with two upright end walls and a hollow shell between the end walls. The lower part of the shell has a large material evacuating opening sealable by two mirror symmetrical doors which are pivotable about horizontal axes. The opening extends all the way between the end walls and is large enough to allow for gravitational outflow of the entire contents of the housing irrespective of the angle of repose of the charge. The doors are bounded by edge faces which make oblique angles with their external surfaces and abut against complementary edge faces of the end walls and shell. Sealing strips on the shell and end walls are engaged by deforming members at the external surfaces of the doors when the opening is closed. The abutting edge faces of the doors also make oblique angles with the respective external surfaces.

Abstract: An apparatus for mixing a cementitious material, such as those quick-setting cementitious materials utilizing a volatile liquid, has a solid frame as the top of a mixing chamber. An inlet end of the solid frame is pivotably mounted on a vehicle. An auger or mixing screw is mounted in the frame, the auger being removable from the frame due to the mounting of one bearing in a removable plate member and the provision of a releasable flexible coupling between this end of the auger shaft and the drive motor. A low pressure gas may be inserted into the housing of the other bearing to prevent seepage of liquid or fumes into that bearing. A removable elastomeric trough forms the bottom of the mixing chamber and contains a discharge opening. A substantially dry material is inserted into the mixing chamber through an inlet hopper and a liquid injection arrangement introduces a liquid into the mixing chamber.

Abstract: Mixing apparatus is provided for the production of mixtures of particulate solids and in particular, for the production of various mortar mixtures. The apparatus includes metering means, control means and transfer means for metering out and introducing predetermined quantities of components into a mixer and thereupon, after mixing, delivering the mixed product into means for loading transportation vehicles. The apparatus has no intermediate containers for storing various mixtures of building materials. A mixer is provided which can be emptied residue-free. A self-cleaning conveying system from the mixer to each transfer device is further provided. The lower wall zone of the mixer can be completely opened for residue-free emptying, the opening angle being greater than the angle of slide of the mixing material or residues thereof in the mixer. Such an opening prevents appreciable residues from being left in the mixer and from contaminating subsequent mixtures.

Abstract: In a concrete production system, an improved aggregates conveying apparatus includes an aggregates drag conveyor having a lower, conveying run which drags aggregates along a centrally-located, common trough shared by separate fine and coarse aggregates hoppers to a discharge end and an upper, return run which moves through a hollow channel formed in a common wall separating the hoppers above the common trough. An improved cement metering apparatus in the system includes a cement conveyor mounted along a trough below the cement hopper so as to make an endless path around a floor of the trough. Baffle gates at each end of the floor coact with the conveyor to prevent inadvertent flow of cement past the ends of the floor and to only permit metered flow of the cement from the discharge end of the trough. The fine and coarse aggregates, and the cement discharge into a mixing auger where, after water is added, they are mixed into concrete before discharge from the auger.

Abstract: An apparatus in which grout is extruded from the same chamber in which mixed. Provision is made to clean the system after it has undergone one cycle of mixing and extrusion. The basic components of the apparatus include a mixing chamber with a mixing ram having collapsible mixing fingers. Encircling this mixing ram is an extruding ram with a ram head. The mixing ram is concentric with and extends through a lower extruding ram cylinder with the upper portion of the mixing ram having a mixing head normally seated in the mixing chamber and concentric with the ram head. Provision is made to bring water into the mixing chamber, to insert grout in the same chamber, and to outlet the water and grout from the same.

Abstract: One of ingredients of green concrete are supplied to a rotary disc through a central tube by a pump or low pressure air and the other ingredient is supplied to the rotary disc from a hopper by a screw conveyor. These ingredients are mixed together on a rotary disc and then projected by centrifugal force.

Abstract: A stirring apparatus is disclosed for stirring mortar or the like, wherein foaming is controlled to the minimum, and moreover, satisfactory stirring effects can be obtained.This apparatus has a roof-shaped stirring blade including two plate-like members inclined to each other, each of which is provided therein with a plurality of flow holes, the stirring blade being reciprocated in the mortar tank.

Abstract: Solar apparatus for producing alcohol including a frame portion, a heating portion, a slurry-forming portion, a fermentation portion, a distillation portion, a condensation portion and a drying portion; the heating portion including a plurality of solar panel members, the slurry-forming portion including a hammer mill and a frustoconical section thereunder, the frustoconical section including a tangential liquid inlet opening and a tangential slurry outlet opening, the fermentation portion including a fermentation chamber, a pump disposed adjacent the chamber, inlet and outlet conduits extending between the pump and the bottom of the chamber, the distillation portion including a base section and a face section, the face section including a conduit having a circuitous path, the condensation portion including a first chamber, a second chamber extending downwardly within the first chamber partway down from the top, a spiral conduit disposed within the first chamber, the drying portion including a solar air heati

Abstract: A slurry mixing and pumping system adapted to automatically control both slurry viscosity and product output volume. Water and raw gypsum delivered to a mixing vat are thoroughly blended by a hydraulically powered agitator blade within the vat. Hydraulic pressure variations experienced by the agitator motor are translated into pneumatic viscosity control signals by a process controller. An air actuated water valve driven by the controller varies water input into the vat to effectuate vicosity correction. Means responsive to vat head level controls output volume.

Abstract: A mounting ring carried by a truck frame supports a swingably positionable mixing and delivery trough by which concrete ingredients are mixed and poured at a site. A catch basin is carried by the mounting ring and provides both nozzles and scraper means serving to purge the belt surface of particles. Barriers at the basin sides laterally confine the purged particles. Positionable scrapers carried by the catch basin are swingable to an inoperable rearward position to permit access to the catch basin for periodic cleaning. Water and particulate are removed from the belt surface to enhance belt life and thence are routed from the catch basin back into the normal flow of concrete ingredients and into the delivery trough. Nozzle sprays, in addition to belt washing, may provide the total water required for the concrete mix.

Abstract: A sealing device adapted for use in mixing equipment includes a cylindrical packing mantling an end portion of the rotating shaft of the mixing blade with a clearance interposed therebetween, the mixing blade including a shoulder from which the rotating shaft thrusts into a side wall of the bowl, the shoulder having a ring-shaped gasket filled in its surface, the cylindrical packing being extended sufficiently to emerge from the side wall of the bowl, and means for pressing the cylindrical packing against the side wall of the bowl so as to enable the cylindrical packing to come into constant abutment with the ring-shaped gasket, thereby allowing no gap to occur therebetween.

Abstract: A mobile concrete mixing apparatus comprising an aggregate storage bin and cement storage bin mounted on a mobile carrier in spaced relation, a water supply tank mounted on the carrier and in operable communication with a water discharge pipe disposed in the proximity of the cement storage bin, a conveyor apparatus movable beneath and between the aggregate storage bin and cement storage bin for moving materials therefrom for discharge into a mixing auger assembly, the aggregate storage bin containing premixed sand and rock materials for achieving a homogeneous moisture and temperature therebetween, the sand-rock mixture, cement mixture and water being mixed together prior to admission thereof into the mixing auger assembly, the auger assembly comprising a plurality of material moving stages and a plurality of mixing stages interposed therebetween to assure a homogeneous mixture for delivery from the mixing auger assembly, all of the operation of the concrete mixing apparatus being initiated by a single lever

Abstract: The support device of the present invention comprises a stationary outer collar and a rotatable inner collar concentrically located within the outer collar. An outwardly extending flange is attached to the outer surface of the inner collar and an inwardly extending flange is attached to the inner surface of the outer collar. These two flanges are superimposed over one another and a plurality of ball bearings are interposed between them so as to permit the inner collar to rotate with respect to the outer collar. The mixer auger is attached to the inner collar and consequently the auger can be rotated about the rotational connection between the inner and outer collars.

Abstract: An apparatus for inhibiting the gross build up of a cold setting foundry sand mixture in a mixing machine in which a fluid inhibitor is discharged into the machine while the machine is substantially empty to prevent or retard the setting of the foundry sand mixture.

Abstract: A continuous sand muller for mixing foundry sand and binder additives includes a premixing tube and a primary mixing tube removably secured to a frame. The premixing tube includes a mixing auger and mixes sand and a catalyst. The primary mixing tube receives the mix from the premixing tube. A resin additive or other binder is fed to the primary mixing tube. A single, double shafted motor drives the primary mixing auger directly and the premixing auger through a timing belt drive. The mixed sand and binder is delivered by the primary mixing tube to an outlet. An access or cleanout cover is removably secured to the primary mixing tube.

Abstract: A foundry sand mixer for mixing and dispensing silica or green sand and their additives through the enclosed longitudinal belt conveyor mechanism having a plurality of openings in the top communicating with a first feeder disposed above the enclosed longitudinal belt conveyor mechanism and including a pair of openings in the bottom. The first feeder includes an auger-type conveyor and a sand weir communicating with the most upstream opening in the first feeder. A first hopper for containing silica sand and a second hopper for containing green sand are disposed over the first feeder. A selective valve is disposed at the bottom of each of the first and second hoppers permitting the flow of sand through only one of the hoppers at any time or preventing the flow of any sand from the hoppers.

Abstract: A slip-on shroud to protect the shank of a mixing paddle of an asphalt mixer. The shroud is disposed on the shank and is formed with a generally triangular cross-sectional area to protect the front of the shank while reducing the quantity of material used to form the shroud and is formed with a generally triangular opening to receive the shank. The shroud is also formed with flanges confronting the opening to retain the shroud on the shank while reducing the quantity of material required to hold the shroud on the shank.

Abstract: A concrete mixing machine is disclosed which mixes small batches of concrete using any desired ratio of gravel, sand, cement, and water. The dry materials are mixed into concrete at the site where the concrete is to be poured. The apparatus includes hoppers for storing the dried mix material, a water tank, a metering slide for measuring desired amounts of cement, sand, and gravel to the desired proportions; a mixing, feeding, and dispensing system; and a hydraulic system for driving the mixing apparatus. The hydraulic drive system is utilized to overcome the binding which occurs when residual concrete begins to set.

Abstract: A rotor adapted to rotate about a rotary shaft and intended for displacing fluids characterized in that the rotor comprises at least two ridges arranged helically around a core part so that a sectional area at right angles to the axis of rotation comprises at least two lobes with intermediate pits, the depth of the pit measured between the core part and a tangential line to the two lobes one on each side of the pit concerned being at least equal to one third of the distance between the core part and the circle described by the point of a lobe furthest remote from the axis of rotation.

Abstract: A mixer especially for mixing materials such as cement and sand with water and with a fibrous reinforcing material such as glass fibre. The mixer consists of a tubular casing containing a skeletal rotor constructed from a plurality of rods extending longitudinally of the casing and spaced apart laterally of each other at positions circumferentially spaced apart around the axis of rotation of the rotor and the longitudinal axis of the casing. The rods are supported on end plates and a central shaft or stub shafts extending from the end plates. The rods are enveloped along at least part of the axial length of the rotor by a helical, outwardly-directed flight having widely-spaced convolutions to impart a component of movement to the mix along the inside of the tubular casing to an outlet.

Abstract: A horizontally oriented mortar mixing drum 11 fabricated of polyethylene material having an elemental cylindrical segment opening through which mortar materials to be mixed may be deposited into or poured from. A perimeter frame having base elemental frame member 15, diametric wall frame members 16 and polyethylene grate 20 is provided for enhancing resistance to torsional stress on drum 11. Wear resistant liner 12 and side panels 13 and 14 cover the interior surface of drum 11. Paddle shaft 18 is rotatably and axially supported within drum 11 and has paddle stubs 28 attached to and extending radially therefrom. Polyethylene mixing paddles 19 are sleeved onto paddle stubs 28 to complete improved mortar mixing drum assembly 10.