GB2377391A - Pressurised transferral of liquid to the inside of a vehicular concrete mixer - Google Patents

Pressurised transferral of liquid to the inside of a vehicular concrete mixer Download PDF

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Publication number
GB2377391A
GB2377391A GB0116816A GB0116816A GB2377391A GB 2377391 A GB2377391 A GB 2377391A GB 0116816 A GB0116816 A GB 0116816A GB 0116816 A GB0116816 A GB 0116816A GB 2377391 A GB2377391 A GB 2377391A
Authority
GB
United Kingdom
Prior art keywords
dispersion
suspension
aqueous solution
drum
pipe
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
GB0116816A
Other versions
GB0116816D0 (en
Inventor
David Bellshaw
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Tarmac Ltd
Original Assignee
Tarmac Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Tarmac Ltd filed Critical Tarmac Ltd
Priority to GB0116816A priority Critical patent/GB2377391A/en
Publication of GB0116816D0 publication Critical patent/GB0116816D0/en
Publication of GB2377391A publication Critical patent/GB2377391A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • B28C5/42—Apparatus specially adapted for being mounted on vehicles with provision for mixing during transport
    • B28C5/4203—Details; Accessories
    • B28C5/4231—Proportioning or supplying water
    • 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
    • B01F35/71—Feed mechanisms
    • B01F35/712—Feed mechanisms for feeding fluids
    • 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
    • B01F35/71—Feed mechanisms
    • B01F35/717—Feed mechanisms characterised by the means for feeding the components to the mixer
    • B01F35/71745—Feed mechanisms characterised by the means for feeding the components to the mixer using pneumatic pressure, overpressure, gas or air pressure in a closed receptacle or circuit system
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28C7/00—Controlling the operation of apparatus for producing mixtures of clay or cement with other substances; Supplying or proportioning the ingredients for mixing clay or cement with other substances; Discharging the mixture
    • B28C7/04—Supplying or proportioning the ingredients
    • B28C7/12—Supplying or proportioning liquid ingredients

Abstract

The on-site preparation of a modified concrete mix in which an aqueous solution, dispersion or suspension of an active ingredient is transferred under pressure through a pipe such as hosepipe 2 to the interior of a drum of a vehicular concrete mixer. This reduces the risk of on-site injuries to operators who would otherwise have to climb a ladder to pour the aqueous active ingredient from a bucket directly into the drum. The liquid can be fed into reservoir 1 by means of funnel 3 and can be pressurised by connecting hosepipe 4, which can be pressurised by the vehicular air-brake compressor, to reservoir 1.

Description

<Desc/Clms Page number 1>
Method of on-site preparation of modified concrete This invention is concerned with a method of on-site preparation of modified concrete. In particular, this invention concerns the on-site preparation of a modified concrete mix in the rotating drum of a vehicular concrete mixer.
Vehicular concrete mixers have been used for many years for transporting mass-produced concrete slurries from concrete factories, where the slurries are prepared, to building and construction sites, where the slurries are used. The properties of a mass-produced concrete mix and/or the dried concrete formed therefrom can be modified by the addition of an active ingredient to the mass-produced concrete mix. Whilst it is preferred that the active ingredient is added to the mass-produced concrete mix before the vehicular concrete mixer departs from the concrete factory, as the desired properties obtainable by using the active ingredient may only be achievable by adding the active ingredient to the mix either immediately or shortly before the modified mix is used, the time taken to transport the cement mix from the factory to the building or construction site may be such that it is necessary to add the active ingredient to the mass-produced concrete mix on-site.
On-site modification of a mass-produced concrete mix contained within a drum of a vehicular concrete mixer is typically performed by an operator, usually the driver of the vehicular concrete mixer or a construction or building worker. The method usually comprises a) preparing an aqueous solution, dispersion or suspension of the active ingredient in a bucket, then b) transferring the aqueous solution, dispersion or suspension to the interior of the drum by pouring the contents of the bucket through the mouth of the drum, and then c) mixing the active ingredient into the mix by rotating the drum. Once the active ingredient is thoroughly mixed into the mix, the modified concrete mix so produced is then discharged from the drum to the appropriate use point.
As the mouth of the rotating drum on a vehicular concrete mixer is usually located well above normal head height, it has been common practice for many years for the operator to climb a ladder, such as the inspection ladder fixed on the vehicular concrete mixer, to get access to the mouth before being able to pour the aqueous contents of the bucket into the rotating drum. However, when carrying a bucket in one hand, the operator has only one hand available to assist in ascending and descending the ladder. Consequently, should the operator
<Desc/Clms Page number 2>
slip or misjudge the steps when climbing up or down the ladder, as the operator has only one hand available to secure or steady himself, there is an increased risk of the operator suffering an injury through falling to the ground or onto the rotating drum. Further, when reaching to pour the contents of the bucket into the drum, there is a possibility the operator may overreach himself, thereby leading to an increased risk of the operator suffering an injury through falling to the ground or onto the rotating drum.
It is an object of the present invention to provide a method of on-site preparation of a modified concrete mix in the rotating drum of a vehicular concrete mixer which method reduces or substantially eliminates the risk of operator injury.
In accordance with the present invention, there is provided a method of on-site preparation of a modified concrete mix, which method comprises: a) preparing an aqueous solution, dispersion or suspension of an active ingredient in a vessel; b) transferring said aqueous solution, dispersion or suspension to the interior of a drum of a vehicular concrete mixer located at a building or construction site at which said modified concrete mix is to be used, said drum containing a mass-produced concrete mix; and c) mixing said aqueous solution, dispersion or suspension into said mix by rotating said drum; characterized in that said aqueous solution, dispersion or suspension is transferred to the interior of said drum under pressure through a pipe having an input end and an output end, wherein the output end of the pipe is located within or at the mouth of the drum, and wherein said aqueous solution, dispersion or suspension is discharged to the interior of the drum through the output end of the pipe.
Preferably, the input end of the pipe is fitted with a funnel or a reservoir for receiving the aqueous solution, dispersion or suspension from the vessel prior to it entering the pipe.
Alternatively, the vessel itself is a reservoir fitted to the input end of the pipe. A pump, airpressure or gravity or a combination of the two preferably provides the pressure required to transfer the aqueous solution, dispersion, or suspension through the pipe.
<Desc/Clms Page number 3>
In one embodiment of the present invention, the pipe is fitted with a pump that, in use, provides pressure either to cause the aqueous solution, dispersion or suspension to travel through the pipe or to increase the rate at which the aqueous solution, dispersion or suspension travels through the pipe.
In another embodiment of the present invention, the pipe is connected to an air-pressure supply system, such as the system that provides air-pressure to the brakes of the vehicular concrete mixer, that, in use, provides air under pressure, e. g. from a compressor, either to cause the aqueous solution, dispersion or suspension to travel through the pipe or to increase the rate at which the aqueous solution, dispersion or suspension travels through the pipe.
In one particular embodiment of the present invention, there is provided a method of on-site preparation of a modified concrete mixmix, which method comprises: a) preparing an aqueous solution, dispersion or suspension of an active ingredient in a bucket; b) transferring said aqueous solution, dispersion or suspension to the interior of a drum of a vehicular concrete mixer located at a building or construction site at which said modified concrete mix is to be used, said drum containing a mass-produced concrete mix; and c) mixing said aqueous solution, dispersion or suspension into said mix by rotating said drum; characterized in that said aqueous solution, dispersion or suspension is transferred to the interior of said drum under pressure through a pipe having an input end and an output end, wherein the input end of the pipe is fitted with a funnel, located on or near to the vehicular concrete mixer but remote from the drum, opening at a height no more than about 2 m, preferably no more than 1.5 m, above ground level, wherein the aqueous solution, dispersion or suspension is poured out of the bucket through the funnel and into the pipe, wherein the output end of the pipe is located within or at the mouth of the drum, wherein the pressure is provided by a pump fitted to the pipe and wherein said aqueous solution, dispersion or suspension is discharged to the interior of the drum through the output end of the pipe.
Preferably, the pump is operated by air pressure, more preferably by air pressure supplied from the air brake system of the vehicular concrete mixer. Alternatively, the pump may be an electric pump, preferably an electric pump operating from the electric battery of the vehicular
<Desc/Clms Page number 4>
concrete mixer. The pump may be fixed to the vehicle or it may be detachably connected to the vehicle.
In another embodiment of the present invention, there is provided a method of on-site preparation of a modified concrete mix, which method comprises: a) preparing an aqueous solution, dispersion or suspension of an active ingredient in a bucket; b) transferring said aqueous solution, dispersion or suspension to the interior of a drum of a vehicular concrete mixer located at a building or construction site at which said modified concrete mix is to be used, said drum containing a mass-produced concrete mix; and c) mixing said aqueous solution, dispersion or suspension into said mix by rotating said drum; characterized in that said aqueous solution, dispersion or suspension is transferred to the interior of said drum under pressure through a pipe having an input end and an output end, wherein the input end of the pipe is fitted with a reservoir, located on or near to the vehicular concrete mixer but remote from the drum, with a closable input opening at a height no more than about 2 m, preferably no more than 1. 5 m, above ground level, wherein the aqueous solution, dispersion or suspension is poured out of the bucket through the input opening and into the reservoir and then the opening is closed, wherein the reservoir is connected to an air supply, such as the system that provides air-pressure to the brakes of the vehicular concrete mixer, wherein the output end of the pipe is located within or at the mouth of the drum, wherein the pressure is provided by air from the air supply and wherein said aqueous solution, dispersion or suspension is discharged to the interior of the drum through the output end of the pipe. Preferably, the air supply is sourced from a compressor, such as the compressor which is used to source air for the air-brake system of the vehicular concrete mixer.
In another embodiment of the present invention, there is provided a method of on-site preparation of a modified concrete mix, which method comprises: a) preparing an aqueous solution, dispersion or suspension of an active ingredient in a vessel; b) transferring said aqueous solution, dispersion or suspension to the interior of a drum of a vehicular concrete mixer located at a building or construction site at which said
<Desc/Clms Page number 5>
modified concrete mix is to be used, said drum containing a mass-produced concrete mix; and c) mixing said aqueous solution, dispersion or suspension into said mix by rotating said drum; characterized in that said aqueous solution, dispersion or suspension is transferred to the interior of said drum under pressure through a pipe having an input end and an output end; wherein the input end of the pipe is fitted with a reservoir located on the vehicular concrete mixer above and remote from the drum and wherein the aqueous solution, dispersion or suspension is transferred from the vessel to the reservoir prior to the vehicular concrete mixer arriving at the building or construction site; wherein the output end of the pipe is located within or at the mouth of the drum, and wherein said aqueous solution, dispersion or suspension is discharged to the interior of the drum through the output end of the pipe.
In yet another embodiment of the present invention, there is provided a method of on-site preparation of a modified concrete mix, which method comprises: a) preparing an aqueous solution, dispersion or suspension of an active ingredient in a vessel ; b) transferring said aqueous solution, dispersion or suspension to the interior of a drum of a vehicular concrete mixer located at a building or construction site at which said modified concrete mix is to be used, said drum containing a mass-produced concrete mix; and c) mixing said aqueous solution, dispersion or suspension into said mix by rotating said drum; characterized in that said aqueous solution, dispersion or suspension is transferred to the interior of said drum under pressure through a pipe having an input end and an output end; wherein the input end of the pipe is fitted to the vessel wherein the vessel is in the form of a reservoir located on the vehicular concrete mixer above and remote from the drum and in which the aqueous solution, dispersion or suspension is prepared prior to the vehicular concrete mixer arriving at the building or construction site; wherein the output end of the pipe is located within or at the mouth of the drum, and wherein said aqueous solution, dispersion or suspension is discharged to the interior of the drum through the output end of the pipe.
In the previous two embodiments of the present invention, the pressure required to cause the aqueous solution, dispersion or suspension to pass through the pipe is provided by gravity. A
<Desc/Clms Page number 6>
pump may be fitted to the pipe to increase the flow rate of the aqueous solution, suspension or dispersion through the pipe. Further, in these embodiments, as a way of improving quality control, it is preferred that the reservoir is filled with the appropriate amount of aqueous solution, dispersion or suspension prior to the vehicular concrete mixer leaving the concrete factory.
When a reservoir is fitted to the input end of the pipe, it is preferably fitted with a valve which may opened to allow the aqueous solution, dispersion or suspension to flow, optionally with the aid of a pump, down the length of pipe. The valve may be manually or electrically operated. Preferably, the reservoir is secured to a position on the vehicular concrete mixer where the operator may reach it without having to ascend or descend a ladder. The reservoir may be secured to a position on the vehicular concrete mixer high above the level at which the operator may reach it from the ground but, in the method of this invention, the aqueous solution, suspension or dispersion is placed in the reservoir before the vehicular concrete mixer arrives at the construction or building site, preferably before the vehicle departs the concrete factory, where safe filling facilities are available.
In another aspect of the present invention, there is provided the use in a method of on-site preparation of a modified concrete mix, which method comprises: a) preparing an aqueous solution, dispersion or suspension of an active ingredient in a vessel; b) transferring said aqueous solution, dispersion or suspension to the interior of a drum of a vehicular concrete mixer located at a building or construction site at which said modified concrete mix is to be used, said drum containing a mass-produced concrete mix; and c) mixing said aqueous solution, dispersion or suspension into said mix by rotating said drum; of a pump and hosepipe to transfer said aqueous solution, dispersion or suspension from said vessel to the interior of said drum.
The invention will now be further exemplified by reference to the accompanying drawing in which Figure I is a view of the rear near-side section of a vehicular concrete mixer having fitted thereto a reservoir (1). The reservoir is connected by a hosepipe (4) to an air supply which provides air from the same compressor that supplies air to the brakes on the vehicular
<Desc/Clms Page number 7>
concrete mixer. A hosepipe (2), through which the aqueous solution, dispersion or suspension is transported from the reservoir (1) to the drum, is connected to the bottom of the reservoir (1). A closable intake funnel (3), through which the aqueous solution, dispersion or suspension is initially fed before it is stored temporarily in the reservoir (1), is located at a convenient height for easy access by an operator. At the building site, the operator prepares a solution of active ingredient in a bucket, then pours the contents of the bucket into the reservoir (1) through funnel (3). Air is then supplied to the reservoir through hosepipe (4) to provide the pressure necessary to transfer the solution from the reservoir (1), through the hosepipe (2) to the drum, where the solution is then mixed with a ready mixed concrete. The ready mixed concrete was placed in the drum at the concrete factory, some time prior to the arrival of the vehicular concrete mixer at the building site.

Claims (12)

  1. Claims 1. A method of on-site preparation of a modified concrete mix, which method comprises : a) preparing an aqueous solution, dispersion or suspension of an active ingredient in a vessel; b) transferring said aqueous solution, dispersion or suspension to the interior of a drum of a vehicular concrete mixer located at a building or construction site at which said modified concrete mix is to be used, said drum containing a mass-produced concrete mix; and c) mixing said aqueous solution, dispersion or suspension into said mix by rotating said drum ; characterized in that said aqueous solution, dispersion or suspension is transferred to the interior of said drum under pressure through a pipe having an input end and an output end, wherein the output end of the pipe is located within or at the mouth of the drum, and wherein said aqueous solution, dispersion or suspension is discharged to the interior of the drum through the output end of the pipe.
  2. 2. A method as claimed in claim 1, wherein the input end of the pipe is fitted with a funnel or a reservoir for receiving the aqueous solution, dispersion or suspension from the vessel prior to it entering the pipe.
  3. 3. A method as claimed in claim 1, wherein the vessel itself is a reservoir fitted to the input end of the pipe and the aqueous solution, dispersion or suspension is prepared in the reservoir.
  4. 4. A method as claimed in any one of the preceding claims, wherein a pump or gravity or a combination of the two provides pressure either to cause the aqueous solution, dispersion or suspension to travel through the pipe or to increase the rate at which the aqueous solution, dispersion or suspension travels through the pipe.
  5. 5. A method of on-site preparation of a modified concrete mix, which method comprises : a) preparing an aqueous solution, dispersion or suspension of an active ingredient in a bucket;
    <Desc/Clms Page number 9>
    b) transferring said aqueous solution, dispersion or suspension to the interior of a drum of a vehicular concrete mixer located at a building or construction site at which said modified concrete mix is to be used, said drum containing a mass-produced concrete mix; and c) mixing said aqueous solution, dispersion or suspension into said mix by rotating said drum; characterized in that said aqueous solution, dispersion or suspension is transferred to the interior of said drum under pressure through a pipe having an input end and an output end, wherein the input end of the pipe is fitted with a funnel, located on or near to the vehicular concrete mixer but remote from the drum, opening at a height no more than about 2 m, preferably no more than 1. 5 m, above ground level, wherein the aqueous solution, dispersion or suspension is poured out of the bucket through the funnel and into the pipe, wherein the output end of the pipe is located within or at the mouth of the drum, wherein the pressure is provided by a pump fitted to the pipe and wherein said aqueous solution, dispersion or suspension is discharged to the interior of the drum through the output end of the pipe.
  6. 6. A method of on-site preparation of a modified concrete mix, which method comprises : a) preparing an aqueous solution, dispersion or suspension of an active ingredient in a bucket; b) transferring said aqueous solution, dispersion or suspension to the interior of a drum of a vehicular concrete mixer located at a building or construction site at which said modified concrete mix is to be used, said drum containing a mass- produced concrete mix; and c) mixing said aqueous solution, dispersion or suspension into said mix by rotating said drum; characterized in that said aqueous solution, dispersion or suspension is transferred to the interior of said drum under pressure through a pipe having an input end and an output end, wherein the input end of the pipe is fitted with a reservoir, located on or near to the vehicular concrete mixer but remote from the drum, with a closable input opening at a height no more than about 2 m, preferably no more than 1. 5 m, above ground level, wherein the aqueous solution, dispersion or suspension is poured out of
    <Desc/Clms Page number 10>
    the bucket through the input opening and into the reservoir and then the opening is closed, wherein the reservoir is connected to an air supply, such as the system that provides air-pressure to the brakes of the vehicular concrete mixer, wherein the output end of the pipe is located within or at the mouth of the drum, wherein the pressure is provided by air from the air supply and wherein said aqueous solution, dispersion or suspension is discharged to the interior of the drum through the output end of the pipe.
  7. 7. A method of on-site preparation of a modified concrete mix, which method comprises : a) preparing an aqueous solution, dispersion or suspension of an active ingredient in a vessel; b) transferring said aqueous solution, dispersion or suspension to the interior of a drum of a vehicular concrete mixer located at a building or construction site at which said modified concrete mix is to be used, said drum containing a mass- produced concrete mix; and c) mixing said aqueous solution, dispersion or suspension into said mix by rotating said drum; characterized in that said aqueous solution, dispersion or suspension is transferred to the interior of said drum under pressure through a pipe having an input end and an output end; wherein the input end of the pipe is fitted with a reservoir located on the vehicular concrete mixer above and remote from the drum and wherein the aqueous solution, dispersion or suspension is transferred from the vessel to the reservoir prior to the vehicular concrete mixer arriving at the building or construction site; wherein the output end of the pipe is located within or at the mouth of the drum, and wherein said aqueous solution, dispersion or suspension is discharged to the interior of the drum through the output end of the pipe.
  8. 8. A method of on-site preparation of a modified concrete mix, which method comprises : a) preparing an aqueous solution, dispersion or suspension of an active ingredient in a vessel; b) transferring said aqueous solution, dispersion or suspension to the interior of a drum of a vehicular concrete mixer located at a building or construction site at
    <Desc/Clms Page number 11>
    which said modified concrete mix is to be used, said drum containing a mass- produced concrete mix; and c) mixing said aqueous solution, dispersion or suspension into said mix by rotating said drum; characterized in that said aqueous solution, dispersion or suspension is transferred to the interior of said drum under pressure through a pipe having an input end and an output end; wherein the input end of the pipe is fitted to the vessel wherein the vessel is in the form of a reservoir located on the vehicular concrete mixer above and remote from the drum and in which the aqueous solution, dispersion or suspension is prepared prior to the vehicular concrete mixer arriving at the building or construction site; wherein the output end of the pipe is located within or at the mouth of the drum, and wherein said aqueous solution, dispersion or suspension is discharged to the interior of the drum through the output end of the pipe.
  9. 9. A method as claimed in claim 7 or claim 8, wherein the pressure required to cause the aqueous solution, dispersion or suspension to pass through the pipe is provided by gravity and, optionally, a pump is fitted to the pipe to increase the flow rate of the aqueous solution, suspension or dispersion through the pipe.
  10. 10. A method as claimed in any one of the preceding claims, wherein when a reservoir is fitted to the input end of the pipe, the reservoir is filled with an amount of aqueous solution, dispersion or suspension prior to the vehicular concrete mixer leaving the concrete factory.
  11. 11. A method as claimed in any one of the preceding claims, wherein when a reservoir is fitted to the input end of the pipe, it is fitted with a valve which may opened to allow the aqueous solution, dispersion or suspension to flow, optionally with the aid of a pump, down the length of pipe.
  12. 12. The use in a method of on-site preparation of a modified concrete mix, which method comprises : a) preparing an aqueous solution, dispersion or suspension of an active ingredient in a vessel;
    <Desc/Clms Page number 12>
    b) transferring said aqueous solution, dispersion or suspension to the interior of a drum of a vehicular concrete mixer located at a building or construction site at which said modified concrete mix is to be used, said drum containing a mass- produced concrete mix; and c) mixing said aqueous solution, dispersion or suspension into said mix by rotating said drum; of a pump and hosepipe to transfer said aqueous solution, dispersion or suspension from said vessel to the interior of said drum.
GB0116816A 2001-07-10 2001-07-10 Pressurised transferral of liquid to the inside of a vehicular concrete mixer Withdrawn GB2377391A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB0116816A GB2377391A (en) 2001-07-10 2001-07-10 Pressurised transferral of liquid to the inside of a vehicular concrete mixer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB0116816A GB2377391A (en) 2001-07-10 2001-07-10 Pressurised transferral of liquid to the inside of a vehicular concrete mixer

Publications (2)

Publication Number Publication Date
GB0116816D0 GB0116816D0 (en) 2001-08-29
GB2377391A true GB2377391A (en) 2003-01-15

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Family Applications (1)

Application Number Title Priority Date Filing Date
GB0116816A Withdrawn GB2377391A (en) 2001-07-10 2001-07-10 Pressurised transferral of liquid to the inside of a vehicular concrete mixer

Country Status (1)

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GB (1) GB2377391A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7824096B2 (en) * 2006-02-15 2010-11-02 Mcneilus Truck And Manufacturing, Inc. Auxiliary water tank and pump assembly for a concrete mixing vehicle

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2052280A (en) * 1979-06-01 1981-01-28 Hudelmaier Ingrid Concrete-mixer
US5137365A (en) * 1990-12-18 1992-08-11 Blend-Rite Industries, Inc. Water metering system for concrete mixer
US5513911A (en) * 1994-09-03 1996-05-07 Stetter G.M.B.H. Vehicle mixer

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2052280A (en) * 1979-06-01 1981-01-28 Hudelmaier Ingrid Concrete-mixer
US5137365A (en) * 1990-12-18 1992-08-11 Blend-Rite Industries, Inc. Water metering system for concrete mixer
US5513911A (en) * 1994-09-03 1996-05-07 Stetter G.M.B.H. Vehicle mixer

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7824096B2 (en) * 2006-02-15 2010-11-02 Mcneilus Truck And Manufacturing, Inc. Auxiliary water tank and pump assembly for a concrete mixing vehicle

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Publication number Publication date
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