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Publication numberUS2926796 A
Publication typeGrant
Publication dateMar 1, 1960
Filing dateDec 5, 1955
Priority dateDec 5, 1955
Publication numberUS 2926796 A, US 2926796A, US-A-2926796, US2926796 A, US2926796A
InventorsMartinson Edwin O
Original AssigneeKoehring Co
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Self-charging mixing and dispensing apparatus
US 2926796 A
Abstract  available in
Images(5)
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Claims  available in
Description  (OCR text may contain errors)

March 1, 1960 E. o. MARTINSON 2,926,796

SELF-CHARGING MIXING AND DISPENSING APPARATUS Filed Dec. 5, 1955 5 Sheets-Sheet 1 Eowm O. MAnTmsoN March 1960 E. o. MARTINSON 2,926,796

SELF-CHARGING MIXING AND DISPENSING APPARATUS Filed Dec. 5, 1955 5 Sheets-Sheet 2 [mm/Wm Eowm O. MARTINSON Afro/ME March 1, 1960 E. o. MARTINSON SELF-CHARGING MIXING AND DISPENSING APPARATUS Filed Dec. 5, 1955 5 Sheets-Sheet 3 f/v VE/VTOR Eowm O. MARTINSON March 1, 1960 E. o. MARTINSON 2,926,796

SELFCHARGING MIXING AND DISPENSING APPARATUS Filed Dec. 5, 1955 5 Sheets-Sheet 4 Enwm O MARTINSON ATTORNEY. y

March 1, 1960 E. o. MARTINSON 2,926,796

SELF-CHARGING MIXING AND DISPENSING APPARATUS Filed Dec. 5, 1955 A 5 Sheets-Sheet 5 hiv Ill llh? [NYE/V701? Enwm O. MARTINSON SELF-CHARGING MIXING AND DISPENSING APPARATUS Application December 5, 1955, Serial No. 550,997

9 Claims. (Cl. 214-2) The present invention relates generally to improvements in the art of loading, mixing and dispensing batches of bulk materials, and relates more especially to improvements in the construction and operation of mechanism for facilitating the prepartion and dispensing of concrete mixtures, road dressings, and other bulk materials.

In the preparation of concrete and similar cement and aggregate mixtures it is desirable that the ingredients be accurately proportioned and thoroughly mixed. While it is a relatively simple matter to produce accurately proportioned concrete or like mixtures at central batching and mixing plants from which batches of the product may be successively transported to the point ofuse in ready mixed condition, it is not always desirable to thus handle the product, especially when long hauls are required. In many cases the cost of concrete or other similar mixtures can be reduced and the placing of the mixtures materially facilitated with the aid of portable batching, mixing and dispensing units mounted upon trucks or other vehicles. Although many previous attempts have been made to provide such mobile units, these prior efi'orts have not been entirely successful either because they failed to meet the ingredient proportioning requirements, or because they were too complicated and cumbersome to manipulate, or because they functioned too slowly and were not sufiiciently flexible in their adaptations It is therefore an important object of this invention to provide a mobile concrete or other material mixing apparatus which obviates all of the difliculties and objections inherent in prior units of this type.

Another important object of the present invention is to provide simplified and effective mechanism for rapidly loading, mixing and unloading successive batches of bulk materials, and which may be conveniently manipulated by a single operator.

A further important object of the invention is to provide a mixing unit capable of producing properly proportioned batches of concrete or the like in rapid succession and delivering the same in any desired direction.

An additional important object of the invention is to provide unitary concrete or similar mixing equipment which functions to pick up and deliver accurately meas ured portions of the ingredients to a mixing receptable from conveniently located supply piles, to thoroughly mix the measured ingredients, and to dispense the final product to any desired locality.

These and other more specific objects and advantages of the invention will be apparent from the following detailed description.

A clear conception of the features constituting the present improvement, and of the construction and operation of preferred embodiments of the invention, may be had by referring to the drawings accompanying and forming a part of this specification in which like reference characters designate the same or similar parts in the various views.

, Fig. 1 is a rear and side perspective view of a mobile States Patent concrete mixing and dispensing unit made in accordance with the present invention and showing the mixer loading bucket in charging position;

Fig. 2 is a similar perspective view of the same unit but showing the mixer tilted to deliver a charge of mixed concrete into the bucket;

Fig. 3 is an enlarged fragmentary side view of the material handling bucket, showing in detail the bucket operating mechanism and the charge weighing device;

Fig. 4 is a fragmentary transverse horizontal section through the assemblage of Fig. 3 taken along the irregular line 44, showing the manner in which an hydraulic line is led from the charge weighing device;

Fig. 5 is a diagrammatic top view of the mobile concrete batching, mixing and dispensing unit, showing the material handling bucket and the mixing receptacle disposed in alinement with the transporting vehicle in solid lines, and swung into alternative loading positions in dotand-dash lines;

Fig. 6 is a diagrammatic view in end elevation of the same mobile mixing unit illustrating the turntable and mixing drum swung transversely of the transporting vehicle, and showing the batch transfer bucket about to deliver a charge of concrete into a high form in solid lines, and also showing the bucket delivering a charge into a lower form in dotted lines, both forms being disposed at a side of the vehicle;

Fig. 7 is another diagrammatic view in side elevation of the concrete mixing unit illustrating the manner in which the mixing drum is adapted to spout mixed batches directly into a form disposed rearwardly of the vehicle and without the aid of the transfer bucket;

Fig. 8 is an enlarged fragmentary side view of the turntable portion of the concrete mixing unit showing fragments of the vehicle chassis, mixing drum, and inner bucket carrying booms;

Fig. 9 is a further enlarged fragmentary front end view of the mixing drum and its driving mechanism; and

Fig. 10 is a side elevation of a modified unit embodying a similar turntable and loading bucket, but adapted for use with a batch truck body of the type commonly used for charging concrete paver machine skips or the like.

While the invention has been shown and described herein as being especially useful for application to mobile concrete batching, mixing and dispensing units, many of the improved features are obviously more generally applicable to equipment for treating and handling other bulk materials; and it is also contemplated that specific descriptive terms employed herein be given the broadest possible interpretation consistent with the disclosure.

Referring to the drawings, the mobile concrete batching, mixing and dispensing plant shown in Figs. 1 to 9 inclusive, comprises in general, a motor vehicle 12 having a chassis 13 mounted on wheels 14; a rotary support or turntable 15 mounted upon the vehicle chassis 13; a mixing drum 16 tiltably mounted upon the turntable 15; and a loading and unloading clamshell bucket 17 carried by outer and inner articulably interconnected booms 18, 19 respecitvely, of which the inner booms 19 are pivotally mounted upon the turntable 15 independently of the mixing drum mounting.

The vehicle 12 is driven by means of an internal com-' bustion engine confined beneath the front hood 21. Power for the mixing, tilting and other functions is provided by means ofan hydraulic pump (not shown) which is operably connected to said engine. If the weight of] the vehicle with its engine is not sufficient to maintain stability under all operating conditions, the vehicle may be provided with outriggers (not shown) in a manner well known to those skilled in the materials handling art.

Firmly secured to the rear portion of the chassis 13y near the rear'drive wheels 14, is a frame 24 having an annular base 25 resting thereon and rigidly attached thereto, and an upright shaft or center pin 26 is journalled for rotation centrally within the base 25 and has a pinion 27 secured to its lower end. The rotary turntable 15 which carries the mixing drum 16 and the material handling bucket 17, is secured to the upper end of the pivot shaft .26 and has three pairs of upstanding ears 28, 29, 3t? thereon. These ears are provided respectively with horizontally alined pivots 32, 33, 34. A double acting hydraulic ram 35 which has its cylinder mounted upon the chassis 13 and frame 24, has its reciprocable plunger 35 provided with a rack 37 which coacts with the pinion 27, see Fig. 8. The turntable 15 is also provided with bearing and hook rollers 33 which coact with the upper and lower surface respectively of the upper flange of the ring base 25.

The rotary material mixing drum 16 may be provided with the usual straight blading common to tilting type mixers. its front end is provided with a ring gear 39. its rear end is provided with a charging and discharging opening 46. it is rotatablysupported upon a U-shaped cradle 41 by roller bearings 42 coacting with a track on its tapered periphery near the charging opening 49, and by a stub shaft 43 projecting centrally from its closed end and coacting with a bearing 44 on the cradle 4i. An hydraulic motor and gear box 45 coacts with the ring gear 3% for effecting rotation of the drum to. The hydraulic motor 35 as well as the hydraulic power units hereinafter to be described are connected to the hydraulic pump on the vehicle by means of piping (not shown) which is led down through the hollow center pin 26.

Although not shown in the drawings the stub shaft 43 is provided with passages by means of which water may be introduced into the drum 16 in a Well known manner.

The rearwardly extending opposite side arms 47 of the cradle 41 are swingably cooperable with the alined pair of pivots 32 carried by the rear ears 2% of the turntable 15, and the medial portions of the cradle arms 47 are provided with depending lugs 48 which are provided with horizontally alined pivots 49, as shown in Fig. 8. A double acting hydraulic ram 56 is interposed between each of the pivots 33 carried by the turntable cars 29 and the pivots 49 mounted on the cradle lugs 48, and the plungers 51 of these rams i) are movable to swing the cradle 41 down or up about the pivots 32 so as to position the mixing drum 16 either in mixing position as shown in Figs. 1 and 6, or in discharging position as depicted in Figs. 2 and 7.

The turntable thus supports the mixing drum 16 for rotation about the turntables own central axis and for tilting fore and aft about the transverse horizontal axis of the cradle pivots 32. The rotary mixer support or turntable 15 is also provided with a removable spout 52 for receiving and guiding the material discharged through the opening 40, and with a loading hopper 53 the outlet opening of which is communicable with the drum opening 40 when the drum 16 is in loading position. The; spout 52 is detachably secured to the turntable 15 between the rear ears 28 thereof, and the loading hopper 53 is carried by this turntable through linkage 54 which functions to automatically position the hopper outlet in communication with the drum opening 40 when the drum 16 is tilted forwardly and to retract the hopper 53 to permit free rearward tilting of the mixing drum.

The loading and unloading clamshell bucket 17 comprises two similar shell sections swingably suspended from a bracket 56 by pivot pins 57, this bracket 56 being swingably suspended from the free swinging extremities of the outer booms 1% by a weighing knuckle member 55 and a pivot pin 53, as illustrated in Fig. 3. The-opposite-ends of these outer booms 18 are articulably connected to the swinging ends of the inner booms 19 by means of a transverse pivot 59, and the opposite ends of the inner booms are swingably mounted upon the turntable ears 3% by the alined pivots 34. The medial portions of the inner booms 19 are provided with lugs '66 which have horizontally alined pivots 61 thereon, and a single acting hydraulic ram 62 is interposed between each of the pivots 6i and the pivot 33 carried by the adjacent turntable car 29 for swinging the inner or front booms 1? upwardly and forwardly. The medial portions of the inner and outer booms have pivot pins 63, 64 mounted in. cars formed thereon respectively, and the corresponding pins 63, 64 of each pair of arms 18, 19 are interconnected by a double acting hydraulic ram 65 adapted to relatively swing these arms about the pivot pin in either direction, see Figs. 1 and 2.

Each of the shells of the bucket 17 is provided with a pair of levers 67 the medial portions of which are fulcrumed upon the adjacent pivots 57 and the lower ends or" which pivotally engage cylindrical tubular braces projecting inwardly from the opposite bucket side walls, While their upper ends are swingable toward and away from each other to open and close the clamshell. A pair of double acting hydraulic rams 65-? have their cylinders pivotally attached to alined pins 76 carried by the upper swinging ends of one set of the levers 67, while the ram plungers 71 have their outer ends likewise secured to alined pivot pins 72 connecting the upper swinging ends of the other set of these levers, whereby outward movement of the ram plungers 71 will close the bucket 17 and inward movement of these plungers will close the bucket, see Figs. 1, 2 and 3. The bucket 17 is also provided with a charge weighing device 73 of the hydraulic piston Bourdon type which coacts with the knuckle member 55 and is operable to transmit motion by fluid pressure through conduits to a dial 74 located near the operators station.

As beforementioned, the various hydraulic rams 35, 55', 62, d5, 69 and the motor 45 are all adapted to be operated from a suitable common source of hydraulic pressure preferably supplied with liquid under pressure by a pump driven by the vehicle motor, and all of these rams are controllable by means of manually manipulable valve levers 76 mounted upon an operators stand 77 carried by one side of the turntable 15, and upon which the charge weight indicating dial 74 and a pressure gauge 78 are also mounted. This common station or stand '77 enables a single attendant to control and to observe the functioning of the unit regardless of the position of the mixing and handling mechanisms relative to the vehicle 12. The booms 18 may if desired be provided with dash pots connected between the knuckle 55 and the bracket 56 for absorbing the inertia of the clamshell bucket 17 when lifting heavy batches of material for delivery into the hopper 53, and the booms 19 with shock absorbing springs (not shown) for cushioning their backward swing.

When the improved mixing apparatus has been mounted upon the motor driven vehicle 12 there is provided a mobile concrete mixing plant which may be utilized in numerous ways in the following manner. Referring especially to the diagram of Fig. 5, here the mixing apparatus has been positioned in proximity to a coarse gravel supply pile 8d, a'fine gravel supply pile $1, a sand supply pile 82, a cement bag supply 83, and a water supply line 84. By manipulating the proper con trol levers 76 located at the station 77, the attendant may readily cause turntable 15 to revolve and the bucket 17 to swing up or down and along the arcuate path represented generally by the dot-and-dash line by admitting fluid under pressure to the various hydraulic rams 35, 62, 65, 69. The details of the hydraulic valving and piping have not been shown because given the described hydraulic components anyone skilled in the hydraulics art could connect them into a system for effecting the functions described.

When the material handling bucket 17 has been por sitioned centrally above any of the aggregate piles 80, 81, 82 with the aid of the hydraulic rams 62, 65 coacting with the booms 19, 18, the rams 69 may be actuated to open the clamshell and the bucket 17 may be lowered by actuating the rams 62, 65 and subsequently closed with the aid of the same rams 69 so as to cause a charge of material to be picked up from the adjacent pile 80,

81, 82. In order to insure the accurate production of a desired mix, each charge of the aggregate thus picked up by the bucket 17, should be carefully weighed with the aid of the uuid pressure device 73 before being delivered into the rotating drum 16 through the hopper 53 and opening 40 as depicted in Fig. 1 by subsequent actuation of the rams 62, 65. If these charges are insuificient more materials should be added, whereas excess materials should be spilled by slightly opening and thereafter reclosing the clamshells. The cement from the bag supply 83 may be likewise applied to the hopper 53 and drum 16 in order to produce a mixture of desired proportions, and sufficient water should also be admitted from the supply line 34 at the loading zone so as to 1 provide the desired consistency whereupon the truck 12 may be moved if necessary, to where the mixed concrete is to be placed.

' The concrete thus produced may be deposited into diverse types of forms 86, 87, 83 a few of which are illustrated diagrammatically in Figs. 6 and 7, and which may be located either laterally of or in alinement with the vehicle 12. These charges may be delivered from the mixing drum 16 either along the short spout 52 into the closed bucket 17 as illustrated in Fig. 2, or directly into a form 88 as depicted in Fig. 7 along a spout 52 and an extension 89. In either case the turntable may be revolved by the ram to eflect delivery in the desired. direction, while the rotating mixing drum 16 may be tilted rearwardly and downwardly by actuating the hydraulic rams 50 coacting with the cradle 41. As shown in solid lines in Fig. 6, the bucket 17 after receiving a batch of concrete from the drum 16 and spout 52 may be elevated and moved by the rams 62, 65 into proper position for delivering the material into a high form 86; or the loaded bucket 17 may merely be moved outwardly away from the vehicle 12 as shown in dotted lines in order to drop the charge into a low form 87 when the clamshell is opened by actuation of the rams 69. When the mixture is spouted directly into a low form 88 as in Fig. 7, the bucket 17 may be elevated by the rams 62, 65 so as to avoid interference with such delivery. The unit may obviously be employed to effect loading, eflicient mixing, and delivery of the concrete in any desired direction or at any height within the limits of movement of the bucket 17.

While the improved mixing apparatus specifically illustrated in Figs. lto 9 inclusive is especially adapted to be used for mixing and delivering concrete, the turntable 15 and the clamshell actuating mechanism may also be utilized for handling other bulk material, such as road making or road dressing substances. In Fig. 10,

' for example, the same turntable 15, bucket 57, and

booms 18, 19 have been mounted upon the chassis 13 of a motor propelled vehicle 12, but the mixing receptacle or drum has been replaced by a dump body 90 swingably mounted upon the turntable 15 by a pivot 91 and adapted to be tilted rearwardly by a hydraulic ram 92. This receptacle or body 90 may be provided with a series of compartments segregated by movable partitions 93, and has an end gate 9d at its pivoted end while its opposite swinging end is provided with a forwardly inclined shield 95. The body 9tlmay thus be loaded with four segregated batches of material by positioning all of the partitions 93 therein, and each partition is also preferably provided with a pivoted shield plate 96 at its upper end adapted to cooperate with the shield 95 and with other plates 96 so as to form loading hoppers,

When an assemblage such as shown in Fig. 10, the turntable 15 maybe revolved with the aid of the ram 35 and by manipulating the proper control lever 76 so as to dispose the body either longitudinally or transversely of the vehicle chassis 13. The body dumping ram 92 should also be controllable by one of the levers 76 in order to etfect dumping and return of the body 90. The hydraulic rams 62, 65 for effecting articulation of the booms 18, 19 and the rams 69 for effecting opening and closing of the clamshell bucket. 17 are also operable as hereinabove described, to cause the bucket to pick up material from assorted supply piles and to deliver batches thereof into the body compartments by gravity, and when these compartments have been supplied with the batches the bucket 17 may be positioned as shown in solid lines in Fig. 6,in order to clear the body 90for dumping purposes. The shield 95 and the shield plates 96 facilitate gravity loading of the several body cornpartments withoutspillage, and after the body 90 has been properly loaded the segregated batches of material confined in the body may be either successively or simultaneously dumped by tilting the body 90 as shown in dot-and-dash lines, by releasing the end gate 94,-and by removing the partitions 93 either successively or simultaneously. p

From the foregoing detailed description of the con struction and operation of the self-charging, mixing and dispensing apparatus. it should be apparent that the present invention provides a mobile unit which is simple and durable in structure and which is also conveniently controllable by a single attendant to load a receptacle with accurately pre-measuredbatches of diverse substances, to mix the materials. if so desired, and to unload the substances or the mixtures either laterally or longitudinally of the transporting vehicle. The several hydraulic rams 35, 50, 62, 65, 69, 92 providequick acting means for revolving the turntable 15, for tilting the drum 16 or the body 90 fore and aft, and for universally moving the clamshell bucket 17 throughout a considerable range. The attendant when located at the station 77 carried by the turntable 15 or standing on the ground if he so wishes has an unobstructed view of all of the working parts of the unit. 7

The improved material mixing plant is furthermore capable of producing concrete mixtures of uniform quality, and the delivery of the final product may be efifected either directly with the long spout 52, 89, or with the aid of the bucket 17. The articulated outer and inner booms 18, 19 from which the loading and unloading bucket 17 is suspended enable this bucket to be disposed considerable distances rearwardly of or laterally away from either side of the vehicle chassis 13, as Well as high above the mixing drum 16 or body 90. The turntable assemblage and the support therefor may also be applied to or bodily removed from a standard motor vehicle chassis 13, and is constructed to prevent possible tilting of the vehicle 13 even when the bucket 17 and the receptacles for the materials are heavily loaded. I

Because various modifications within the scope of the appended claims may occur to persons skilled in the art, it is not desired to limit this invention to the exact details of construction and operation of the apparatus herein specifically shown and described.

I claim:

1.In bulk material handling apparatus, the combination comprising, a rotatable support; a bulk material receptacle tiltably mounted on said support for movement between charge and discharge position; a loading and unloading bucket for said receptacle having separable clamshell parts for effecting loading and unloading of said bucket; articulated linkage swingably supporting said bucket on said support for movement to and from charge and discharge positions adjacent said receptacle for depositing bulk material therein and receiving bulk material therefrom respectively; means for weighing bulk material in said bucketprior to deposit in said receptacle; and means for opening and closing said bucket parts t'or loading and unloading said bucket, said means including means for progressively spreading and closing said bucket parts for effecting dribbling of excess material from the bucket until a predetermined amount of material is present in said bucket prior to deposit of said material in said receptacle.

2. In bulk material handling apparatus, the combination comprising, a vehicle, a turntable carried by said vehicle, a rotary concrete mixing receptacle tiltably mounted upon said turntable for movement between charge and discharge positions, a material transfer bucket for said receptacle, articulable linkage swingably carrying said bucket upon said turntable for movement to and from charge and discharge positions adjacent said receptacle, and means for emptying the contents or" the bucket into said receptacle when the same are in the charge position and for discharging the contents of the receptacle into the bucket when the same are in the discharge po sition.

3. In combination, a mobile support, a turntable mounted upon said support for revolution about an upright axis, a rotatable concrete mixing receptacle tiltably mounted upon said turntable for movement between charge and discharge positions, a loading and unloading bucket for said receptacle, outer and inner pivotally interconnected booms movably suspending said bucket from said turntable independently of said receptacle, a hydraulic ram for revolving said turntable, and other hydraulic rams for swinging said booms relative to each other and relative to said turntable for moving said bucket to and from charge and discharge positions adjacent said receptacle.

4. In bulk material handling apparatus, the combination comprising, a turntable rotatable about a vertical axis, a bulk material receptacle pivotally mounted upon said turntable for movement about a horizontal axis between charge and discharge positions, said receptacle being adapted to receive and discharge material by gravity flow into and out of said receptacle when in said positions respectively, a loading and unloading bucket for-said receptacle, a boom having inner and outer sections forming an extensible support carrying said bucket for movement to and from a charge position above said receptacle and a receiving position below said receptacle, szu'd outer boom section being pivotally connected at itsopposite end portions to said inner boom section and said bucket, respectively, for articulated movement about horizontal axes, and power actuators for moving said boom sections to swing said bucket vertically and horizontally relative to said receptacle.

5. A bulk material handling apparatus comprising, in combination, a vehicle having a rear platform, a turntable mounted on said platformfor rotation about a vertical axis, a receptacle mounted on said turntable for tilting motion about a horizontal axis between-raised charge and lowered discharge positions, a material handling bucket, an articulated boom pivotally suspending said material handling bucket on the outer end portion thereof, the inner end portion of said boom being pivotally supported on said turntable for vertical swing about axis parallel to the tilting axis of said receptacle, said boom being shaped to swing said bucket over said receptacle for charging, under the rear of said receptacle for receiving material from said receptacle, and laterally away from said receptacle for filling, and emptying said bucket at a distance from said receptacle.

6. In bulk material handling apparatus, the combination comprising, a supporting structure, a table mounted thereon for movement about a vertical axis, a single ended concrete mixer mounted on said table for rotation about a substantially horizontal axis and for tilting movement between charge and discharge positions, a bucket for containing bulk materials, and articulated supporting till means for said bucket mounted on said table, said supporting means including power operated means permitting lifting of said bucket and moving of said bucket horizontally to at least a first position for emptying the contents of said bucket into said mixer when the latter is in charge position and a second position for receiving the contents of said mixer when the latter is in discharge position.

7. In bulk material handling apparatus, the combination comprising a vehicle, a turntable on said vehicle, a bulk material receptacle pivotally mounted upon said turntable, said receptacle being tiltable forwardly from a raised charge position to a down discharge position, a transfer bucket for said receptacle, an articulated boom having a pair of arms straddling the receptacle each with an inner and an outer boom section, said boom being pivotally secured to said turntable at one end of said inner boom sections, the other end of said inner boom sections being pivotally'connected to one end of said outer boom sections, the other end of said outer boom sections carrying said bucket for movement horizontally and vertically from a filling position at a distance from the turntable to a charge position over the receptacle so that its contents may be emptied therein when the receptacle is in the raised charge positiornand to a forward position below the receptacle so as to receive the contents of the receptacle when the latter is tilted forwardly to its discharge position, power means operatively interposed between medial portions of said boom sections for actuating said sections relative to each other about the pivotal connection of their adjacent ends, and additonal power means operatively associated with and for rotating said turntable and moving said inner boom sections relative to said turntable.

8. in bulk material handling apparatus, the combination comprising a vehicle, a turntable on said vehicle, a bulk material receptacle mounted upon said support, a transfer bucket for said receptacle, an articulated boom having a pair of arms straddling the receptacle each with an inner and an outer boom section, said boom being pivotally secured to said turntable at one end of said inner boom sections, the other end of said inner boom sections being pivotally connected to one end of said outer boom sections, the other end of said outer boom sections carrying said bucket for movement horizontally and vertically from a filling position at a distance from the turntable to a charge position over the receptacle, said bucket having means for emptying its contents into the receptacle when in said charge position, means for discharging the contents of the receptacle into said bucket when the latter is in position below the receptacle, and power means for operating said boom and for rotating said turntable.

9. In bulk material apparatus, the combination comprising, a supporting structure; a bulk material receptacle mounted on said supporting structure for tilting movement between charge and discharge position, said receptacle re ceiving and discharging material by gravity flow; a bucket for loading and unloading said receptacle; boom means carrying said bucket pivotally mounted on said supporting structure for moving said bucket vertically and laterally to and from charge and. discharge positions adjacent said receptacle; means for emptying the contents of said bucket into the receptacle when the same are in the charge position, and means for discharging the contents of said receptacle into the bucket when the same are in the discharge position.

References Cited in the file of this patent UNlTED STATES PATENTS 1,468,472 Heine Sept. 18, 1923 2,347,456 Beckwith Apr. 25, 1944 2,571,113 Crosby Oct. 16, 1951 2,706,623 Styes Apr. 19, 1955 2,755,939 Rush luly 24, 1956 2,801,759 Adams Aug. 6, 1957

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Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3131913 *Mar 1, 1962May 5, 1964Challenge Cook Bros IncTiltable transit mixer
US3167307 *Apr 23, 1963Jan 26, 1965Koehring CoSelf-batching mixer
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US3232460 *Jan 7, 1964Feb 1, 1966Petersen Ind IncConcrete hoisting and placing apparatus
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CN105269684A *Nov 6, 2015Jan 27, 2016阎军吉Feeding control bin allowing material to enter from front portion and come out from rear portion
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Classifications
U.S. Classification414/21, 414/555, 177/141, 414/687, 366/30, 414/726, 414/683
International ClassificationB28C5/42, B28C5/00
Cooperative ClassificationB28C5/4234, B28C5/4241
European ClassificationB28C5/42A3, B28C5/42A3B2