US3321190A - Re-mixer for concrete placer - Google Patents

Re-mixer for concrete placer Download PDF

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US3321190A
US3321190A US556203A US55620366A US3321190A US 3321190 A US3321190 A US 3321190A US 556203 A US556203 A US 556203A US 55620366 A US55620366 A US 55620366A US 3321190 A US3321190 A US 3321190A
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concrete
placer
mixer
hopper
blades
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US556203A
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Richard H Mott
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28C5/00—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions
    • B28C5/08—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions using driven mechanical means affecting the mixing
    • B28C5/0806—Details; Accessories
    • B28C5/0831—Drives or drive systems, e.g. toothed racks, winches
    • B28C5/085—Hydraulic drives
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/30—Driving arrangements; Transmissions; Couplings; Brakes
    • B01F35/32—Driving arrangements
    • B01F35/32005—Type of drive
    • B01F35/32045—Hydraulically driven

Definitions

  • a concrete placer is a machine for pumping concrete mix, supplied thereto as from a mixer truck, to a job site where the mix is to be poured.
  • mixer trucks can be kept well away from the site where the concrete is being poured, and this results in a more orderly and efiicient job. Placement costs are reduced substantially and use of the placer provides easy placement of the mix in ordinary slab construction as well as in difiicult to reach locations.
  • Mixer trucks can be kept moving because the concrete placer eliminates waiting time for the trucks and keeps trucks out of congested construction areas.
  • the concrete which is supplied to the placer is not as well mixed as it should be for easy pumping of the mix to the job location. It is believed that a mixing attachment for the placer is needed which will knead the concrete and thereby mix aggregate sizes, coat unmixed particles with cement, and break up balls of unmixed sand.
  • the mixer attachment of the invention accomplishes these mixing functions and thus improves the pumpability of the concrete mix which is supplied to the placer.
  • the mixed attachment includes an auger having ribbon-type auger blades supported for rotation in a hopper of a concrete placer machine. The auger is rotated by a hydraulic motor which is coupled to the auger and located with it at the hopper of the placer.
  • a hydraulic pump is located remotely from the hopper at the engine of the placer and is coupled to the engine as by a sheave and pulley belt arrangement. Thus, power for operating the pump and the hydraulic motor is supplied from the engine of the concrete placer.
  • a system of conduits is provided for connecting the pump and the hydraulic motor in a hydraulic circuit which is operative to drive the hydraulic motor with hydraulic fluid supplied from the pump. This conduit system includes a valve which provides on-off control and speed control of the hydraulic motor by controlling the amount of hydraulic fluid which is supplied to the motor.
  • Another object of the invention is to provide a mixer attachment with auger blades which knead the concrete mix to assure that it is thoroughly mixed before it is pumped to a pouring site.
  • a further object of the invention is to provide a mixer wherein mixing blades are rotated by a hydraulic motor and the motor is driven by a pump located remotely from the motor.
  • FIGURE 1 is an elevational view of a re-mixer attachment for a placer, the outline of the placer being shown with light lines;
  • FIGURE 2 is a top plan view of the re-mixer and placer of FIGURE 1 also showing the outline of the placer in light lines;
  • FIGURE 3 shows the coupling between a hydraulic motor and a gear box included in the mixer
  • FIGURE 4 is a view of the gear box of FIGURE 3 showing the drive shafts for the auger blades of the mixer;
  • FIGURE 5 is a view of the rotary blades of the mixer down inside a hopper of the placer.
  • FIGURE 6 is a view of the blades when they are located in a raised position above the hopepr.
  • the mixer of the invention includes ribbon-type auger blades 12 and 14 mounted respectively on shafts 16 and 1 8 which project outward from a gear box 20.
  • Auger blade 12 is a right-hand type and auger blade 14 is a left-hand type.
  • the auger blades are located well down inside a hopper 22 to which concrete mix is supplied, the hopper being part of the concrete placer.
  • the shafts 16 and 1 8 for the auger blades are rotated by gears within the gear box 20 which are driven by a hydraulic motor generally designated 24.
  • the assembly of motor and anger blades is suspended in and over the hopper 22 of the concrete placer by means of a bracket 26 to which the motor 24 is pivotally jointed.
  • the blades 12 and 14 may be placed in the downward position as shown in FIGURES 1 and 5, and in this position the lower end of the motor and blade assembly is suspended from a chain 28 (FIGURE 1) which is attached to the top of the hopper 22.
  • the assembly may be moved to a raised position as shown in FIGURE 6 wherein the blades are above the hopper 22. This position may be used when the placer is pumping concrete that does not require re-mixing, or when cleaning the machine.
  • an oil reservoir 30 Surrounding the hopper 22 there is an oil reservoir 30 which contains the oil that is pumped through the hydraulic system of the mixer attachment. Oil flows from the hydraulic reservoir 30 through a stand pipe 32, a valve 34, a filter 36 and a conduit 38 to a pump 40 located remotely from the hopper 22 near the engine 42 of the concrete placer. Power for operating the pump 40 is supplied by the engine 42 via a belt 44 which loops around sheaves 46 and 48, sheave 46 being connected to the pump 40.
  • the pump 40 pumps oil through a conduit 50 to a valve 52 mounted below the hopper 22.
  • a valve 52 mounted below the hopper 22.
  • Rotation of the re-mixer may be reversed by reversing the position of the spool in the valve 52, or the re-mixer may be stopped by centering the spool.
  • the speed of the re-mixer may also be selected by feathering the spool to direct just enough oil to the hydraulic motor to get the desired speed.
  • the revolving ribbon augers knead the concrete, mixing aggregate sizes, coating unmixed particles of cement, and breaking up balls of unmixed sand to thereby facilitate pumping of the concrete mix.
  • the bearing areas on the rotating shafts of the mixer are sealed to prevent concrete from entering the bearings.
  • the hydraulic motor 24 is attached to the tube 60, and a gasket 62 is used as a seal at that point.
  • the tube 60 is attached to the gear box 20, and a gasket 64 is used as a seal at that point. Torque is transmitted from the motor 24 to the gear box 20 through the drive shaft 66.
  • the bearings in the gear box 20 on the auger shafts 16 and 18 are sealed from concrete by a housing assembly 68 on each side of the gear box.
  • the housing assembly contains a packing seal 70 which prevents concrete from entering the housing. Grease is forced into the housing assembly on the gear box side of the seal to purge the seal of any particles of concrete which may have entered the seal area.
  • the sealing of the rotating shafts increases the service life of the re-mixer attachment.
  • the invetnion provides a re-mixer attachment which thoroughly mixes concrete mix which is supplied to a concrete placer to be pumped to a job site. This is accomplished with a simple, relatively inexpensive attachment which can be easily hooked up to the concrete placer to accomplish the mixing.
  • a mixer attachment for a concrete placer having a hopper in which concrete mix is received and having a reservoir for operating fluid and an engine powering the placer
  • said mixer attachment comprising rotary mixing blades, motor means coupled to said rotary mixing blades for rotating said blades to mix concrete in said hopper, means for supporting the combination of said rotary mixing blades and said motor means at said hopper with said mixing blades in said hopper to extend into concrete mix when provided in said hopper, fluid pressure means operated by said placer engine for driving said motor means and conduit means for connecting said fluid pressure means to said motor means and to said reservoir and providing an operative circuit for operating said motor means.
  • conduit means includes a valve between said fluid pressure means and said motor means, said valve being operable to control the flow rate of fluid from said fluid pressure means to said motor means to thereby control the speed of said motor means.
  • conduit means includes a line from said reservoir to said fluid pressure means, a line from said fluid pressure means to said valve, feed and return lines between said valve and said motor means, and a return line from said valve to said reservoir.
  • a re-mixer attachment comprising auger means including ribbon type auger blades, motor means coupled to said auger means for rotating said blades to mix concrete in said hopper, means supporting the combination of said auger means and said motor means at said hopper with said blades in said hopper to mix concrete when placed the-rein, driving means coupled to said placer engine and driven by said engine to in turn drive said motor means, conduit means connected between said reservoir and said driving means, further conduit means connected between said driving means and said motor means, and return conduit means connected between said motor means and said reservoir, said conduit means and said driving means together providing an operative circuit for operating said motor means.

Description

R. H. MOTT May 23, I967 RIB-MIXER FOR CONCRETE PLACER 5 Sheets-Sheet 1 Filed June 8, 1966 INVENTOR, flaw/(P0 A! Morr- BY May 23, 1967 R. H MQTT RE'MIXER FOR CONCRETE PLACER I 5 Sheets-Sheet 2 Filed June 8, 1.966
ifi &
am mm INVENTOR. @CAM/FD 67% May 23, 1967 R. H. MOTT 3,321,190
RE-MIXER FOR CONCRETE PLACER Filed June 8, 1966 5 Sheets-Sheet 2 INVENTOR. fi/CHAQO M077 BY 'M/1.50M, 515E745 fiAra/aase EMT-v5 & (164 /6 United States Patent 3,321,190 RE-MIXER FOR CONCRETE PLACER Richard H. Mott, 1604 W. 3th St., Sioux Falls, S. Dak. 57105 Filed June 8, 1966, Ser. No. 556,203 8 Claims. (Cl. 259-478) This invention relates to concrete placers and attachments for such placers, and more particularly to a mixer attachment for a concrete placer which re-mixes plastic concrete mix in the placer to facilitate pumping of the mix.
A concrete placer is a machine for pumping concrete mix, supplied thereto as from a mixer truck, to a job site where the mix is to be poured. By employing one or more concrete placers, mixer trucks can be kept well away from the site where the concrete is being poured, and this results in a more orderly and efiicient job. Placement costs are reduced substantially and use of the placer provides easy placement of the mix in ordinary slab construction as well as in difiicult to reach locations. Mixer trucks can be kept moving because the concrete placer eliminates waiting time for the trucks and keeps trucks out of congested construction areas.
Sometimes the concrete which is supplied to the placer is not as well mixed as it should be for easy pumping of the mix to the job location. It is believed that a mixing attachment for the placer is needed which will knead the concrete and thereby mix aggregate sizes, coat unmixed particles with cement, and break up balls of unmixed sand.
The mixer attachment of the invention accomplishes these mixing functions and thus improves the pumpability of the concrete mix which is supplied to the placer. The mixed attachment includes an auger having ribbon-type auger blades supported for rotation in a hopper of a concrete placer machine. The auger is rotated by a hydraulic motor which is coupled to the auger and located with it at the hopper of the placer. A hydraulic pump is located remotely from the hopper at the engine of the placer and is coupled to the engine as by a sheave and pulley belt arrangement. Thus, power for operating the pump and the hydraulic motor is supplied from the engine of the concrete placer. A system of conduits is provided for connecting the pump and the hydraulic motor in a hydraulic circuit which is operative to drive the hydraulic motor with hydraulic fluid supplied from the pump. This conduit system includes a valve which provides on-off control and speed control of the hydraulic motor by controlling the amount of hydraulic fluid which is supplied to the motor.
Accordingly, it is an object of this invention to provide a mixer attachment for a concrete placer which functions to re-mix concrete supplied to the placer.
Another object of the invention is to provide a mixer attachment with auger blades which knead the concrete mix to assure that it is thoroughly mixed before it is pumped to a pouring site.
A further object of the invention is to provide a mixer wherein mixing blades are rotated by a hydraulic motor and the motor is driven by a pump located remotely from the motor.
Other objects of this invention will appear in the following description and appended claims, reference being had to the accompanying drawings forming a part of this specification wherein like reference characters designate corresponding parts in the several views.
On the drawings:
FIGURE 1 is an elevational view of a re-mixer attachment for a placer, the outline of the placer being shown with light lines;
since the invention is capable of other FIGURE 2 is a top plan view of the re-mixer and placer of FIGURE 1 also showing the outline of the placer in light lines;
FIGURE 3 shows the coupling between a hydraulic motor and a gear box included in the mixer;
FIGURE 4 is a view of the gear box of FIGURE 3 showing the drive shafts for the auger blades of the mixer;
FIGURE 5 is a view of the rotary blades of the mixer down inside a hopper of the placer; and
FIGURE 6 is a view of the blades when they are located in a raised position above the hopepr.
Before explaining the present invention in detail, it is to be understood that the invention is not limited in its application to the details of construction and arrangement of parts illustrated in the accompanying drawings, embodiments and of being practiced or carried out in various ways. Also, it is to be understood that the phraseology or terminology employed herein is for the purpose of description and not of limitation.
As shown on the drawings:
The mixer of the invention includes ribbon-type auger blades 12 and 14 mounted respectively on shafts 16 and 1 8 which project outward from a gear box 20. Auger blade 12 is a right-hand type and auger blade 14 is a left-hand type. The auger blades are located well down inside a hopper 22 to which concrete mix is supplied, the hopper being part of the concrete placer. The shafts 16 and 1 8 for the auger blades are rotated by gears within the gear box 20 which are driven by a hydraulic motor generally designated 24.
The assembly of motor and anger blades is suspended in and over the hopper 22 of the concrete placer by means of a bracket 26 to which the motor 24 is pivotally jointed. The blades 12 and 14 may be placed in the downward position as shown in FIGURES 1 and 5, and in this position the lower end of the motor and blade assembly is suspended from a chain 28 (FIGURE 1) which is attached to the top of the hopper 22. The assembly may be moved to a raised position as shown in FIGURE 6 wherein the blades are above the hopper 22. This position may be used when the placer is pumping concrete that does not require re-mixing, or when cleaning the machine.
Surrounding the hopper 22 there is an oil reservoir 30 which contains the oil that is pumped through the hydraulic system of the mixer attachment. Oil flows from the hydraulic reservoir 30 through a stand pipe 32, a valve 34, a filter 36 and a conduit 38 to a pump 40 located remotely from the hopper 22 near the engine 42 of the concrete placer. Power for operating the pump 40 is supplied by the engine 42 via a belt 44 which loops around sheaves 46 and 48, sheave 46 being connected to the pump 40.
The pump 40 pumps oil through a conduit 50 to a valve 52 mounted below the hopper 22. There are two hoses 54 and 56 leading from the valve 52 to the .hydraulic motor 24. Oil is directed by the valve 52 through one of these hoses to the motor. Oil returns through the other hose, through the valve 52, and back to the reservoir through another conduit 58. Rotation of the re-mixer may be reversed by reversing the position of the spool in the valve 52, or the re-mixer may be stopped by centering the spool. The speed of the re-mixer may also be selected by feathering the spool to direct just enough oil to the hydraulic motor to get the desired speed. In operation the revolving ribbon augers knead the concrete, mixing aggregate sizes, coating unmixed particles of cement, and breaking up balls of unmixed sand to thereby facilitate pumping of the concrete mix.
Referring to FIGURES 3 and 4, it may be seen that the bearing areas on the rotating shafts of the mixer are sealed to prevent concrete from entering the bearings. The hydraulic motor 24 is attached to the tube 60, and a gasket 62 is used as a seal at that point. The tube 60 is attached to the gear box 20, and a gasket 64 is used as a seal at that point. Torque is transmitted from the motor 24 to the gear box 20 through the drive shaft 66. The bearings in the gear box 20 on the auger shafts 16 and 18 are sealed from concrete by a housing assembly 68 on each side of the gear box. The housing assembly contains a packing seal 70 which prevents concrete from entering the housing. Grease is forced into the housing assembly on the gear box side of the seal to purge the seal of any particles of concrete which may have entered the seal area. The sealing of the rotating shafts increases the service life of the re-mixer attachment.
The invetnion provides a re-mixer attachment which thoroughly mixes concrete mix which is supplied to a concrete placer to be pumped to a job site. This is accomplished with a simple, relatively inexpensive attachment which can be easily hooked up to the concrete placer to accomplish the mixing.
I claim:
1. A mixer attachment for a concrete placer having a hopper in which concrete mix is received and having a reservoir for operating fluid and an engine powering the placer, said mixer attachment comprising rotary mixing blades, motor means coupled to said rotary mixing blades for rotating said blades to mix concrete in said hopper, means for supporting the combination of said rotary mixing blades and said motor means at said hopper with said mixing blades in said hopper to extend into concrete mix when provided in said hopper, fluid pressure means operated by said placer engine for driving said motor means and conduit means for connecting said fluid pressure means to said motor means and to said reservoir and providing an operative circuit for operating said motor means.
2. The mixer attachment of claim 1 in which said rotary mixing blades form auger means.
3. The mixer attachment of claim 2 in which said auger means comprises a left-hand ribbon auger and a righthand ribbon auger, and means supporting said ribbon augers in axial alignment for rotation.
4. The mixer attachment of claim 1 in which said fluid pressure means is located remotely from said motor means and is connected thereto by said conduit means.
5. The mixer attachment of claim 1 in which said conduit means includes a valve between said fluid pressure means and said motor means, said valve being operable to control the flow rate of fluid from said fluid pressure means to said motor means to thereby control the speed of said motor means.
6. The mixer attachment of claim 5 in which said conduit means includes a line from said reservoir to said fluid pressure means, a line from said fluid pressure means to said valve, feed and return lines between said valve and said motor means, and a return line from said valve to said reservoir.
7. The mixer attachment of claim 1 in which said motor means is coupled to said rotary mixing blades by gears provided in a gear box, a drive shaft connected between said motor means and said gears and another shaft between said gears and said rotary blades, said shafts being sealed to prevent particles from interfering with the opertion of said shafts.
8. In a concrete placer having a hopper in which concrete mix is received and having a reservoir for pressure fluid and an engine powering said placer, the combination therewith of a re-mixer attachment comprising auger means including ribbon type auger blades, motor means coupled to said auger means for rotating said blades to mix concrete in said hopper, means supporting the combination of said auger means and said motor means at said hopper with said blades in said hopper to mix concrete when placed the-rein, driving means coupled to said placer engine and driven by said engine to in turn drive said motor means, conduit means connected between said reservoir and said driving means, further conduit means connected between said driving means and said motor means, and return conduit means connected between said motor means and said reservoir, said conduit means and said driving means together providing an operative circuit for operating said motor means.
References Cited by the Examiner UNITED STATES PATENTS 2,513,012 6/1950 Dugas 259-161 2,618,576 11/1952 Brown 259-161 3,227,426 1/1966 Williams 259153 3,231,245 '1/1966 Harvey 259l53 WALTER A. SCHEEL, Primary Examiner.
R. W. JENKINS, Assistant Examiner.

Claims (1)

1. A MIXER ATTACHMENT FOR A CONCRETE PLACER HAVING A HOPPER IN WHICH CONCRETE MIX IS RECEIVED AND HAVING A RESERVOIR FOR OPERATING FLUID AND AN ENGINE POWERING THE PLACER, SAID MIXER ATTACHMENT COMPRISING ROTARY MIXING BLADES, MOTOR MEANS COUPLED TO SAID ROTARY MIXING BLADES FOR ROTATING SAID BLADES TO MIX CONCRETE IN SAID HOPPER, MEANS FOR SUPPORTING THE COMBINATION OF SAID ROTARY MIXING BLADES AND SAID MOTOR MEANS AT SAID HOPPER WITH SAID MIXING BLADES IN SAID HOPPER TO EXTEND INTO CONCRETE MIX
US556203A 1966-06-08 1966-06-08 Re-mixer for concrete placer Expired - Lifetime US3321190A (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5385402A (en) * 1990-12-04 1995-01-31 Sumter Transport, Inc. Hazardous waste transportation and disposal
US5626423A (en) * 1990-12-04 1997-05-06 The Maitland Company Apparatus and method for transporting and agitating a substance
US20140251703A1 (en) * 2013-03-05 2014-09-11 Trevor George Marchand Vehicle for the transport of construction materials in hard to reach areas
US9016931B2 (en) 2012-11-12 2015-04-28 Sumter Transport Tank agitation system with moveable shaft support

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2513012A (en) * 1947-08-14 1950-06-27 Higgins Ind Inc Mixing machine
US2618576A (en) * 1952-11-18 Sheets-xsheet i
US3227426A (en) * 1964-05-04 1966-01-04 Chester I Williams Grout-delivery unit
US3231245A (en) * 1963-10-10 1966-01-25 James A Harvey Mobile grouting plant

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2618576A (en) * 1952-11-18 Sheets-xsheet i
US2513012A (en) * 1947-08-14 1950-06-27 Higgins Ind Inc Mixing machine
US3231245A (en) * 1963-10-10 1966-01-25 James A Harvey Mobile grouting plant
US3227426A (en) * 1964-05-04 1966-01-04 Chester I Williams Grout-delivery unit

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5385402A (en) * 1990-12-04 1995-01-31 Sumter Transport, Inc. Hazardous waste transportation and disposal
US5626423A (en) * 1990-12-04 1997-05-06 The Maitland Company Apparatus and method for transporting and agitating a substance
US6333446B1 (en) 1990-12-04 2001-12-25 The Maitland Company, Inc. Hazardous waste transportation and disposal
US6641297B2 (en) 1990-12-04 2003-11-04 Robert M. Rumph Hazardous waste transportation and disposal
US9016931B2 (en) 2012-11-12 2015-04-28 Sumter Transport Tank agitation system with moveable shaft support
US9573102B2 (en) 2012-11-12 2017-02-21 The Maitland Company Tank agitation system with moveable shaft support
US20140251703A1 (en) * 2013-03-05 2014-09-11 Trevor George Marchand Vehicle for the transport of construction materials in hard to reach areas
US8939239B2 (en) * 2013-03-05 2015-01-27 Trevor George Marchand Vehicle for the transport of construction materials in hard to reach areas

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