CA2487613A1 - Vehicle mounted concrete mixing drum and method of manufacture thereof - Google Patents

Vehicle mounted concrete mixing drum and method of manufacture thereof Download PDF

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Publication number
CA2487613A1
CA2487613A1 CA002487613A CA2487613A CA2487613A1 CA 2487613 A1 CA2487613 A1 CA 2487613A1 CA 002487613 A CA002487613 A CA 002487613A CA 2487613 A CA2487613 A CA 2487613A CA 2487613 A1 CA2487613 A1 CA 2487613A1
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Prior art keywords
drum
helical
mould
mold
concrete
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CA002487613A
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French (fr)
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CA2487613C (en
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Anthony Khouri
William Rodgers
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • 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
    • 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
    • B28C5/18—Mixing in containers to which motion is imparted to effect the mixing
    • B28C5/1825—Mixers of the tilted-drum type, e.g. mixers pivotable about an axis perpendicular to the axis of rotation for emptying
    • B28C5/1856—Details or parts, e.g. drums
    • B28C5/1862—Construction of drum, e.g. provided with mixing blades
    • B28C5/1868—Construction of drum, e.g. provided with mixing blades with mixing elements held stationary
    • 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
    • B28C5/4268—Drums, e.g. provided with non-rotary mixing blades
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/56—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using mechanical means or mechanical connections, e.g. form-fits
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/112—Single lapped joints
    • B29C66/1122—Single lap to lap joints, i.e. overlap joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/54—Joining several hollow-preforms, e.g. half-shells, to form hollow articles, e.g. for making balls, containers; Joining several hollow-preforms, e.g. half-cylinders, to form tubular articles
    • B29C66/543—Joining several hollow-preforms, e.g. half-shells, to form hollow articles, e.g. for making balls, containers; Joining several hollow-preforms, e.g. half-cylinders, to form tubular articles joining more than two hollow-preforms to form said hollow articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/63—Internally supporting the article during joining
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/72—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined
    • B29C66/721—Fibre-reinforced materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/72—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined
    • B29C66/721—Fibre-reinforced materials
    • B29C66/7212—Fibre-reinforced materials characterised by the composition of the fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
    • B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
    • B29C70/28—Shaping operations therefor
    • B29C70/30—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core
    • B29C70/32—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core on a rotating mould, former or core
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
    • B29C70/88—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts characterised primarily by possessing specific properties, e.g. electrically conductive or locally reinforced
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/71—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the composition of the plastics material of the parts to be joined
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/72—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined
    • B29C66/721—Fibre-reinforced materials
    • B29C66/7214—Fibre-reinforced materials characterised by the length of the fibres
    • B29C66/72141—Fibres of continuous length
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/72—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined
    • B29C66/721—Fibre-reinforced materials
    • B29C66/7214—Fibre-reinforced materials characterised by the length of the fibres
    • B29C66/72143—Fibres of discontinuous lengths
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/712—Containers; Packaging elements or accessories, Packages
    • B29L2031/7154—Barrels, drums, tuns, vats

Abstract

A method of manufacture of a vehicle mounted rotary concrete mixing drum of the type having an opening at one end for receiving and/or discharge of concrete therefrom and at the other end, means for engaging a drive assembly so as to rotate the drum for mixing or discharging concrete. The drum is manufactured from at least one mould using at least plastics material and further includes integrally attached vanes outstand from the internal surface of the drum forming an archimedian spiral disposed such that when the drum is rotated in a first direction, the concrete contents are mixed and when the drum is rotated in a second direction the contents are discharged from the drum; wherein, the method comprises the steps of; a) preparing a first generally helical inner mold part containing a surface extending between first and second helical edges; b) mounting the first helical inner mould part on a support c) enclosing the inner helical mold assembly within an outer mould formed by at least one outer mold part; d) fitting a second mating inner helical mold part to the first inner mould part to form an inner mold assembly; e) injecting a polyurethane elastomer into a cavity defined by said inner mold assembly and the outer mould assembly to form an inner wall element comprising one half of an interior wall of the mixer and one helical blade; f) allowing said polyurethane to cure; g) removing said at least one outer mold parts to expose said inner wall element; h) removing said inner wall element one said inner molds;

Claims (32)

1 A method of manufacture of a vehicle mounted rotary concrete mixing drum of the type having an opening at one end, for receiving and/or discharge of concrete therefrom and at the other end, means for engaging a drive assembly so as to rotate the drum for mixing or discharging concrete; wherein, the drum is manufactured from at least one mould using at least one plastics material; wherein the drum further includes integrally attached vanes which outstand from the internal surface of the drum forming an archimedian spiral disposed such that when the drum is rotated in a first direction, the concrete contents are mixed and when the drum is rotated in a second direction the contents are discharged from said drum; wherein, the method comprises the steps of;
a) preparing a first generally helical inner mold part containing a surface extending between first and second helical edges;
b) mounting the first helical inner mould part on a support e) enclosing the inner helical mold assembly within an outer mould farmed by at least one outer mold part;
d) fitting a second mating inner helical mold part to the first inner mould part to form an inner mold assembly;
e) injecting a polyurethane elastomer into a cavity defined by said inner mold assembly and the outer mould assembly to form an inner wall element comprising one half of an interior wall of the mixer and one helical blade;
f) allowing said polyurethane to cure;
g) removing said at least one outer mold parts to expose said inner wall element;
h) removing said inner wall element one of said inner molds;
2. A method according to claim 1 comprising the additional step of placing a reinforcing member in a recess formed in said inner mold part.
3~A method according to claim 2, wherein steps a) - h) are repeated thereby providing a second helical inner wall element.
4.~A method according to claim 3, wherein the first and second helical inner wall elements are complimentary and combine to form an inner wall surface of the mixing drum.
5.~A method according to claim 4, comprising the further step of placing said first and second helical inner wall elements into a jig where opposing of said elements are held adjacent; the wall elements defining an inner cavity of said drum.
6.~A method according to claim 5, wherein said opposing edges are sealed to complete said inner wall of said drum.
7.~A method according to claim 6, comprising the further step of removing said inner wall from said jig and placing said inner wall on a mandrel such that the mandrel is disposed in said inner cavity.
8.~A method according to claim 7, wherein the inner wall is placed on said mandrel via an open end of said inner wall.
9.~A method according to claim 8, comprising the further step of applying structural layers of glass fibre reinforced plastic to the polyurethane inner layer.
10.~A method according to claim 9, wherein the internal surface of the drum includes an elastomer which allows mixing of the contents of the concrete at a concrete boundary layer;
11.~A method according to claim 10, wherein said reinforcing member is a continuous rope inserted in a recess in said blades.
12.~A method of construction of a plastics concrete mixing drum wherein the method includes the use of inner and outer molds each made up from separated mould parts which are divided along two helical lines thereby allowing formation of a drum interior wall from two complementary mould parts.
13.~A method of manufacture of a vehicle mounted rotary concrete mixing drum of the type having an opening at one end for receiving and discharge of concrete therefrom and at the other end means for engaging a drive assembly so as to rotate the drum for mixing or discharging concrete; wherein, the drum is manufactured from at least one inner mould and at least one opposing outer mould; wherein the drum includes integrally attached vanes which outstand from the internal surface of the drum forming an archimedian spiral disposed such that when the drum is rotated in a first direction the concrete contents are mixed and when the drum is rotated in a second direction the contents are discharges from said drum; and wherein the internal surface of the drum is formed or lined with an elastomer which causes mixing of the contents of the concrete at the concrete boundary layer; wherein the method comprises the steps of;
a) preparing a first inner helical mold containing a surface intermediate side edges of the mould;
b) placing a reinforcing rod in a recess in said inner mold;
c) enclosing the inner helical mold assembly within at least one outer mold part;
d) sealing a joint between said inner mold part and said at least one outer mold part;
e) injecting a polyurethane elastomer into a cavity defined by said inner mold and said at least one outer mold part to form an inner helical wall element comprising one half of an interior of the mixer and one helical blade;
g) allowing said polyurethane to cure;
h) removing said at least one outer mold parts;
i) removing one of said inner molds;
j) removing the interior polyurethane inner helical wall element molding form the remainder of the inner mold assembly;
k) repeating steps a) - j) to form a second inner wall element.
14 A method according to claim 13 comprising the further steps of:
a) placing a second inner wall element along with said first inner helical wall element in a jig where the jointing surfaces are held adjacent so as to form an inner wall;
b) sealing the join formed by said jointing surfaces.
15 A method according to claim 14 wherein comprises the additional step of a) inserting a mandrel into an open discharge end of a drum interior b) winding structural layers of glass fibre reinforced plastic about an, outer surface of said inner wall.
16 A method of construction of a plastics mixing drum comprising the steps of:
a) preparing a first inner mold containing a surface extending from a joint line midway between two helical blades to a mid line mould joint line at an inner edge of said blades;
b) placing a reinforcing rod in a recess in said inner mold;
c) fitting a second mating inner helical mold to form an inner mold assembly;
d) enclosing the inner helical mold assembly within at least one outer mold part;
e) sealing a joint between said inner maid assembly and said at least one outer mold part;
injecting a polyurethane elastomer into a cavity defined by said inner mold assembly and said at least one outer maid part to form one half of the interior of the mixer and one of the helical blades;
f) allowing said polyurethane to cure;
g) removing said at least one outer mold parts;
h) removing ore of said inner molds;
i) removing the interior polyurethane molding from the remainder of the inner mold assembly;
j) placing said two helical blade and interior moldings in a jig where the jointing surfaces are held adjacent;
k) insetting a mandrel into an open discharge end of the drum;
l) applying structural layers of glass fibre reinforced plastic the polyurethane layer.
17 A method according to any of the foregoing claims wherein the reinforcing is fitted with spacers which centralize the rod in its recess.
18 A method according to claim 17 wherein, the first and second inner helical mold elements are jointed with a sealing compound or gaskets along an inner edge.
19 A method according to claim 19 wherein the outer mold is formed in three separate mold parts.
20 A method according to claim 19 wherein, the joint between said two inner helical elements forming a helical blade is made with a polyurethane elastomer compound.
21 A method of manufacture of a vehicle mounted concrete mixing drum comprising the steps of;
a) taking a helical inner mould part and mounting the mould on a support;
b) placing at least one external mould in opposing relationship to said inner mould;
c) injecting a flowable material into a space formed between said inner mould and said outer mould such that the flowable material forms a helical element which will form at least part of an inner surface of said drum;
d) removing the at least one outer mould;
e) removing the helical element from said inner mould;
f) repeating steps a) - e) so as to form a second helical element;
g) preparing an exterior surface of the helical elements for bonding to a structural layer of glass fibre.
22. A method according to claim 21 wherein the flowable material is polyurethane.
23 A method according to claim 22 wherein, said first and second helical elements are joined in a jig to form an inner surface of said drum.
24 A method according to claim 23 comprising the further step of preparing an exterior surface of the mixer for bonding to a structural layer of glass fibre.
25 A method according to claim 24 comprising the additional step of winding a structural layer of fiberglass about said exterior surface.
26 A vehicle mounted rotary concrete mixing drum of type having an opening at one end for receiving and/or discharge of concrete therefrom and at the other end, means for engaging a drive assembly so as to rotate the drum for mixing or discharging concrete; wherein, the drum is manufactured from at least one mould using at least one plastics material; wherein the drum further includes integrally attached vanes which outstand from the internal surface of the drum forming an archimedian spiral disposed such that when the drum is rotated in a first direction, the concrete contents are~

mixed and when the drum is rotated in a second direction the contents are discharged from said drum; wherein the drum is formed by a method comprising the steps of;
a) preparing a first generally helical inner mold part containing a surface extending between first and second helical edges;
b) mounting the first helical inner mould part on a support c) enclosing the inner helical mold assembly within an outer mould formed by at least one outer mold part;
d) fitting a second mating inner helical mold part to the first inner mould part to form an inner mold assembly;
e) injecting a polyurethane elastomer into a cavity defined by said inner mold assembly and the outer mould assembly to form an inner wall element comprising one half of an interior wall of the mixer and one helical blade;
f) allowing said polyurethane to cure;
g) removing said at least one outer mold parts to expose said inner wall element;
h) removing said inner wall element one of said inner molds;
27 A vehicle mounted concrete mixing drum formed by a method of manufacture comprising the steps of;
a) taking a helical inner mould part and mounting the mould on a support;
b) placing at least one external mould in opposing relationship to said inner mould;
c) injecting a flowable material into a space formed between said inner mould and said outer mould such that the flowable material forms a helical element which will form at least part of an inner surface of said drum;
d) removing the at least one outer mould;
e) removing the helical element from said inner mould;
f) repeating steps a) - e) so as to form a second helical element;
g) preparing an exterior surface of the helical elements for bonding to a structural layer of glass fibre.
28 A concrete mixing drum according to claim 27 wherein the flowable material is polyurethane.
29 A concrete mixing drum according to claim 27 wherein helical blades projecting from an inner surface of said drum have a pitch dimension of between 1- 2 meters and are formed by elastomeric material.
30 A mixing drum according to claim 28 wherein the wall strength of said drum is around 600MPa at a wall thickness of 8mm.
31. A mixing drum according to claim 29 wherein the polyurethane forms an inner layer which is approximately 3mm thick.
32 A mixing drum according to claim 31 wherein and said structural layer comprises filament windings forming a layer of approximately 5mm thickness.
CA2487613A 2002-05-31 2003-05-31 Vehicle mounted concrete mixing drum and method of manufacture thereof Expired - Lifetime CA2487613C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
AUPS2753 2002-05-31
AUPS2753A AUPS275302A0 (en) 2002-05-31 2002-05-31 Vehicle mounted concrete mixing drum and method of manufacture thereof
PCT/AU2003/000664 WO2003101694A1 (en) 2002-05-31 2003-05-31 Vehicle mounted concrete mixing drum and method of manufacture thereof

Publications (2)

Publication Number Publication Date
CA2487613A1 true CA2487613A1 (en) 2003-12-11
CA2487613C CA2487613C (en) 2012-06-26

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US (1) US7784995B2 (en)
EP (1) EP1551607A4 (en)
JP (1) JP2005528254A (en)
KR (1) KR100679346B1 (en)
CN (1) CN1659005B (en)
AP (1) AP1840A (en)
AU (2) AUPS275302A0 (en)
BR (1) BR0311472B1 (en)
CA (1) CA2487613C (en)
EA (1) EA006349B1 (en)
GE (1) GEP20074200B (en)
HR (1) HRP20041184B1 (en)
IL (1) IL165360A0 (en)
MX (1) MXPA04011853A (en)
NI (1) NI200400071A (en)
NO (1) NO20045110L (en)
NZ (1) NZ536790A (en)
OA (1) OA12994A (en)
PL (1) PL372630A1 (en)
WO (1) WO2003101694A1 (en)
YU (1) YU112104A (en)
ZA (1) ZA200410266B (en)

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AUPS275302A0 (en) 2002-05-31 2002-06-27 Khouri, Anthony Vehicle mounted concrete mixing drum and method of manufacture thereof
WO2005018898A1 (en) * 2003-08-15 2005-03-03 Mc Neilus Truck And Manufacturing, Inc. Mixing drum blade
CA2535779C (en) 2003-08-15 2011-09-27 Mcneilus Truck And Manufacturing, Inc. Mixing drum hatch
BR0318465A (en) * 2003-08-15 2006-09-12 Mc Neilus Truck & Mfg Inc concrete mixing truck to transport concrete from one location to another and mixing drum
US7802914B2 (en) 2003-08-15 2010-09-28 McNeihus Truck and Manufacturing, Inc. Mixing drum blade support
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