WO2023111773A1 - Device for stirring a mixture - Google Patents

Device for stirring a mixture Download PDF

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Publication number
WO2023111773A1
WO2023111773A1 PCT/IB2022/061836 IB2022061836W WO2023111773A1 WO 2023111773 A1 WO2023111773 A1 WO 2023111773A1 IB 2022061836 W IB2022061836 W IB 2022061836W WO 2023111773 A1 WO2023111773 A1 WO 2023111773A1
Authority
WO
WIPO (PCT)
Prior art keywords
blade
movement
rest position
extending
bushings
Prior art date
Application number
PCT/IB2022/061836
Other languages
French (fr)
Inventor
Paola SPADONI
Original Assignee
Spadoni Beer Division S.R.L.
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 Spadoni Beer Division S.R.L. filed Critical Spadoni Beer Division S.R.L.
Publication of WO2023111773A1 publication Critical patent/WO2023111773A1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/05—Stirrers
    • B01F27/07—Stirrers characterised by their mounting on the shaft
    • B01F27/073—Stirrers characterised by their mounting on the shaft with stirring elements moving with respect to the stirrer shaft, e.g. floating or comprising contracting chambers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/05—Stirrers
    • B01F27/07—Stirrers characterised by their mounting on the shaft
    • B01F27/071—Fixing of the stirrer to the shaft
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/05—Stirrers
    • B01F27/11—Stirrers characterised by the configuration of the stirrers
    • B01F27/112—Stirrers characterised by the configuration of the stirrers with arms, paddles, vanes or blades
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/05—Stirrers
    • B01F27/11—Stirrers characterised by the configuration of the stirrers
    • B01F27/112—Stirrers characterised by the configuration of the stirrers with arms, paddles, vanes or blades
    • B01F27/1124—Stirrers characterised by the configuration of the stirrers with arms, paddles, vanes or blades rake-shaped or grid-shaped
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/80—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis
    • B01F27/96—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis with openwork frames or cages
    • C—CHEMISTRY; METALLURGY
    • C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
    • C12C—BEER; PREPARATION OF BEER BY FERMENTATION; PREPARATION OF MALT FOR MAKING BEER; PREPARATION OF HOPS FOR MAKING BEER
    • C12C7/00—Preparation of wort
    • C—CHEMISTRY; METALLURGY
    • C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
    • C12C—BEER; PREPARATION OF BEER BY FERMENTATION; PREPARATION OF MALT FOR MAKING BEER; PREPARATION OF HOPS FOR MAKING BEER
    • C12C7/00—Preparation of wort
    • C12C7/14—Lautering, i.e. clarifying wort
    • C12C7/16—Lautering, i.e. clarifying wort by straining
    • C12C7/17—Lautering, i.e. clarifying wort by straining in lautertuns, e.g. in a tub with perforated false bottom
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F2101/00—Mixing characterised by the nature of the mixed materials or by the application field
    • B01F2101/06—Mixing of food ingredients
    • B01F2101/15—Mixing of beer ingredients

Definitions

  • This invention relates to a device for stirring a mixture, in particular a mixture for beer wort, which is widely used in the beer production sector.
  • the first step consists in mixing water with pure ground barley malt or together with other substitute cereals. Subsequently, the mixture, inside the mixing vat, is brought to different temperatures until reaching a maximum temperature of 76- 78°C in order to obtain, thanks to the endogenous enzymes present in the barley malt, the complete saccharification of the starches.
  • the second step is a filtration step which consists in separating the solid parts of the mixture (husk) from the liquid part (wort).
  • the husks are removed and used as processing by-products for other uses.
  • the mixture purified from the husk (also called the first wort), together with the washing waters, are transferred to the boiling vat.
  • the third step therefore consists in boiling the wort. During this step the hops are added, the wort is sterilised, some unwanted volatile substances are moved away and the wort is concentrated.
  • the fourth and last step is the step of separating the hot cloudy part in which the precipitates consisting of coagulated proteins and solid residues of the hops are moved away from the wort by centrifugal force.
  • the production plants for beer wort currently on the market comprise several vats where the steps described above are carried out.
  • each step is carried out in a vat dedicated to it, which is optimised to perform the step in question. It is also known that, with a view to reducing the price and overall size of the systems, so-called “compact" systems have been introduced on the market in which some steps are carried out in the same vat, thus reducing the number of vats present in the system.
  • the various possibilities for merging the steps in a single vat one of the most frequent is that of carrying out the first step (that is, the mixing and mashing step) and the second step (that is, the filtration phase) in the same vat.
  • the main problem which is highlighted by this merging relates to the device for stirring the vat which must, on the one hand, provide an excellent mixing of the mixture and, on the other hand, a cutting of the husk during filtration without ruining the structure of the filtering bed of the vat.
  • the first step is penalised in terms of efficiency since the stirring device, which is the result of the compromise, does not stir the mixture in an optimum manner with the consequence of not being able to have a fast and uniform distribution of the temperature inside the vat.
  • the technical purpose of the invention is therefore to provide a stirring device for a mixture which is able to overcome the drawbacks of the prior art.
  • the aim of the invention is therefore to provide a stirring device which allows the first step and the second step to be performed in the same vat in an optimum manner.
  • a further aim of the invention is to provide a stirring device which avoids mixing the filtering bed of the vat during the filtering step.
  • a further aim of the invention is to provide a stirring device which allows a fast and uniform distribution of the temperature inside the vat during the mashing step.
  • a further aim of the invention is to provide a stirring device which is practical and efficient in such a way as to obtain a high quality product.
  • FIGS 1A to 1C are perspective views of the stirring device in different configurations of use
  • Figure 2 is a front view of a stirring device inserted in a vat
  • Figure 3 is a top view of the vat and of the stirring device located thereon.
  • the numeral 100 denotes a device for stirring a mixture, in particular a mixture for beer wort.
  • the stirring device 100 comprises a first and a second bushing 10a, 10b connected or connectable to a supporting arm 200 of a vat “T”.
  • vat "T” is used to mean a vessel designed to perform the steps for obtaining the beer. In particular, in this description, the mixing and mashing and filtration steps are performed in the vat “T”.
  • the stirring device 100 comprises a blade 20 configured for mixing the mixture.
  • the stirring device 100 also comprises a first rod 31 and a second rod 32 parallel to each other and extending between an upper end 31a, 32a and a lower end connected to the blade 20.
  • the first and second rods 31, 32 are inserted in a slidable fashion in respective bushes 10a, 10b in such a way as to be simultaneously movable by translation along an axial direction of movement “M”, as described in detail below.
  • the blade 20 comprises a base plate 20a extending on a plane transversal to the direction of movement "M".
  • the base plate 20a extends in a plane perpendicular to the direction of movement "M”.
  • the base plate 20 is connected to the lower ends of the first and second rods 31, 32.
  • the base plate 20a has in cross section a shape delimited by a perimeter edge which follows a closed broken line forming two rectangular triangles aligned and having one side (adjacent to the right angle) in common.
  • the blade 20 also comprises a pair of first plates 20b', 20b" engaged, respectively, with the first and second rods 31, 32 close to the lower end 31b, 32b.
  • the first plates 20b', 20b" define a plane transversal, preferably perpendicular, to the base plate 20a.
  • the pair of first plates 20b', 20b" has a substantially rectangular shape wherein the larger dimension is transversal to the first and second rods 31, 32.
  • the blade 20 also comprises a pair of second plates 20c', 20c" extending from the perimeter edge of the base plate 20a towards the first plates 20b', 20b".
  • the second plates 20c', 20c" are set at an angle to the base plate 20a to define an acute angle with the base plate 20a.
  • the base plate 20a comprises a first and a second hole 21.
  • the first and second holes 21 are substantially triangular in shape.
  • first and the second hole 21 are made close to the pair of second plates 20c', 20c".
  • the presence of the holes 21 makes the mixing operations simpler and more effective.
  • the presence of the holes 21 makes the blade 20 lighter and easier to handle.
  • the blade 20 is made of AISI 304 steel or AISI 316 steel.
  • the blade 20 is movable, along the direction of movement "M", at least between a rest position and an operating position.
  • the blade 20 In the rest position, the blade 20 is close to the bushings 10a, 10b and the upper end 31a, 32a of each rod 31, 32 protrudes from the respective bushing 10a, 10b ( Figure 1C). In this situation, the blade 20 does not act on the mixture and there is no risk of scraping the bottom of the vat "T" and, in particular, its filtering elements 301.
  • the blade 20 In the operating position, on the other hand, the blade 20 is distal from the bushings 10a, 10b and the upper end 31a, 32a of each rod 31, 32 is retracted in the bushing 10a, 10b.
  • the stirring device 100 also comprises a first and a second telescopic arm each extending, starting from a bushing 10a, 10b, parallel to the direction of movement "M".
  • the first and second telescopic arms are configured to allow a sliding insertion or extraction of the first and second rods 31, 32.
  • first and second telescopic arms each comprise a first portion 51a, 52a extending away from the bushings 10, 10b towards the blade 20 and a second portion 51b, 52b extending from the first portions 51a, 52a and slidably insertable in or extractable from the first portions 51a, 52a when the blade 20 is moved between the rest position and the operating position.
  • the first and second rods 31, 32 and the first and second telescopic arms have, in cross section, a substantially circular shape.
  • the first portion 51a, 52a of the first and second telescopic arms and the second portion 5 lb, 52b of the first and second telescopic arms are hollow.
  • the first portion 51a, 52a also has a diameter larger than the respective second portion 51b, 52b of the first and second telescopic arms in such a way that the second portion 51b, 52b can be inserted or extracted from the first portion 51a, 52a.
  • the second portion 51b, 52b of each telescopic arm has a diameter greater than the diameter of the first and second rods 31, 32.
  • the first and second rods 31, 32 slide in respective second portions 51b, 52b of the telescopic arms.
  • the upper ends 31a, 32a protrude progressively from the bushings 10a, 10b ( Figure IB).
  • the second portions 51b, 52b also slide and are retracted into the first portions 51a, 52a whilst the upper ends 31a, 32a of the first and second rods 31, 32 are pushed towards the other in such a way as to protrude further from the bushings 10a, 10b ( Figure 1C).
  • the presence of the telescopic arms allows the first and second rods 31, 32, when the blade 20 is in the rest position, to not protrude excessively from the bushings 10a, 10b, avoiding excessively increasing the overall dimensions of the stirring device 100 and of the vat "T".
  • the stirring device 100 also comprises a locking element 40 connected or connectable to the supporting arm 200 in such a way as to be interposed between the first and the second rods 31, 32.
  • the locking element 40 is configured to define an end of stroke when the blade 20 is in the operating position and to define a supporting point for the blade 20 when the blade 20 is in the rest position.
  • the locking element 40 prevents the blade 20 from sliding along the line of movement "M” beyond the operating position, preventing the blade 20 from striking against the base wall of the vat "T".
  • the locking element 40 also prevents, when the blade 20 is in the rest position, that the latter slides in an uncontrolled and unwanted manner downwards, that is to say, towards the operating position.
  • the locking element 40 comprises a first rectilinear portion 40a oriented, when the locking element 40 is connected to the supporting arm 200, parallel to the direction of movement “M”.
  • the first rectilinear portion 40a is inserted and fixed in a receiving seat made on the supporting arm 200 in a central position relative to the first and second bushings 10a, 10b.
  • the first rectilinear portion 40a is parallel to the direction of movement "M" and to the first and second rods 31, 32.
  • the first rectilinear portion 40a protrudes from the receiving seat from the part of the blade 20 by a length approximately equal to the length of the first portions 51a, 52a of the telescopic arms.
  • the locking element 40 also comprises a second portion 40b set at an angle to the first portion 40a.
  • the second portion 40b forms a right angle with the first rectilinear portion 40a.
  • the second portion 40b is connected at the first rectilinear portion 40a at an end of the first rectilinear portion 40a facing towards the blade 20.
  • the second portion 40b is integrated with the first rectilinear portion 40a.
  • the second portion 40b is removably connectable to the first rectilinear portion 40a.
  • the locking element 40 also comprises a third portion 40c connected at the first rectilinear portion 40a to an end of the first rectilinear portion 40a opposite that to which the second portion 40b is connected.
  • the third portion 40c has, in cross section, a dimension greater than that of the second portion 40b.
  • the first rectilinear portion 40a is rotatably associated with the receiving seat made on the supporting arm 200 in such a way as to rotate about its own axis of extension to orient the second portion 40b towards the blade 20 or in the opposite direction.
  • the stirring device 100 also comprises an engagement element 60 integral with the blade 20.
  • the engagement element 60 is configured to abut on the locking element 40 following a movement of the blade 20 from the rest position to the operating position.
  • the engagement element 60 abuts against, during movement of the blade 20 from the rest position to the operating position, the second portion 40b of the locking element 40 in such a way as to prevent the blade 20 from sliding, along the line of movement "M", beyond the operating position.
  • the engagement element 60 has a substantially upturned “U” shape and extends parallel to the direction of movement "M" towards the first and the second bushings 10a, 10b.
  • the engagement element 60 has two vertical bars, 60a, 60b preferably having a circular cross-section, having an end integrated with the base plate 20a and extending along the direction of movement "M" towards the bushings 10a, 10b.
  • the engagement element 60 also comprises a horizontal bar 60c transversal to the vertical bars 60a, 60b and joining the vertical bars 60a, 60b to give the engagement element 60 the shape of an inverted "U” and to abut against the locking element 40 (and more specifically, against the second portion 40b) when the blade 20 passes from the rest position to the operating position.
  • the blade 20 In use, when it is necessary to mix the mixture in the vat "T", the blade 20 is moved from the rest position to the operating position.
  • first and second rods 31, 32 slide in the first and second telescopic arms along the direction of movement "M" and the telescopic arms are elongated.
  • the first and second rods 31, 32 slide until the upper ends 31a, 32a are retracted into the first and second bushings 10a, 10b.
  • the engagement element 60 is also moved together with the blade 20.
  • the engagement element 60, and in particular the horizontal bar 60c strikes against the second portion 40b of the locking element 40.
  • the horizontal bar 60c of the engagement element 60 abuts, resting, against the second portion 40b of the locking element 40 preventing further sliding of the blade 20 ( Figure 1A) beyond the operating position.
  • the stirring device 100 comprises a spacer element 10 extending transversely to the direction of movement "M" and having the ends which can be engaged respectively with the first and second rods 31, 32.
  • the spacer element 10 is perpendicular to the first and second rods
  • the spacer element 10 is positioned above the bushings 10a, 10b
  • the perforated circular portions of the spacer element 10 are concentric relative to the first and second bushings 10a, 10b and rest on the first and second bushings 10a, 10b when the plate 20 is in the operating configuration.
  • the spacer element 10 comprises a supporting protrusion 12.
  • the supporting protrusion 12 is made in a central portion of the spacer element 10.
  • the supporting protrusion 12 is made in the form of a bolt.
  • the blade 20 is movable by translating along the direction of movement "M" between the rest position and an intermediate position ( Figure IB) and between the intermediate position and the operating position or vice versa.
  • the spacer element 10 can be gripped by an operator for manually moving the blade 20 from the operating position to the intermediate position.
  • the engagement element 60 abuts against the supporting protrusion 12 for supporting the blade 20, and in particular, to keep it in the intermediate position.
  • the engagement element 60 comprises a shaped bar 60d positioned below the horizontal bar 60c and extending between the vertical bars 60a, 60b.
  • the shaped bar 60d is substantially in the shape of an upturned “V” in such a way as to engage the supporting protrusion 12 when the blade 20 is in an intermediate position.
  • the shaped bar 60d rests on and engages with the supporting protrusion 12 of the spacer element 10 in such a way that the blade 20 is supported and kept in the intermediate position.
  • the spacer element 10 in the intermediate position, has the ends resting on the bushings 10a, 10b from which protrude, at least partly, the upper ends 31a, 32a of the first and second rods 31, 32.
  • the shaped bar 60d of the engagement element 60 rests on the supporting protrusion 12 of the spacer element 10.
  • the engagement element 60 comprises a gripping portion accessible to a user when the blade 20 is in an intermediate position.
  • the gripping portion can be gripped by a user for manually moving the blade 20 from the intermediate position to the rest position.
  • the gripping portion coincides with the horizontal bar 60c of the engagement element 60.
  • the stirring device 100 comprises a further spacer element 11 positioned below the first and the second bushings 10a,
  • the further spacer element 11 is engaged with the second portions 5 lb, 52b of the first and second telescopic arms.
  • the further spacer element 11 is fixed and integral with a lower end (that is, facing towards the blade 20) of the second portions 5 lb, 52b of the first and second telescopic arms in such a way that an extraction of the second portions 51b, 52b from the first portions 51a, 52a corresponds to a lowering of the further spacer element 11, whilst a retraction of the second portions 51b, 52b in the first portions 51a, 52a corresponds to a raising of the further spacer element 11.
  • the further spacer element 11 can be engaged with the locking element 40 to keep the blade 20 in the rest position.
  • the second portion 40b of the locking element 40 is configured to act as a support on which the further spacer element
  • the further spacer element 11 rests on the second portion 40b of the locking element 40 in such a way that the blade 20 cannot descend in an uncontrolled manner towards the operating position.
  • the shaped bar 60d of the engagement element 60 rests on the supporting portion 12 of the spacer element 10 whilst the spacer element 10 is raised relative to the first and second bushings 10a, 10b.
  • the blade 20 In use, in the rest position, the blade 20 is close to the first and second bushings 10a, 10b. In this situation, the second portion 51b, 52b of the telescopic arms is inserted in the first portion 51a, 52a and the first and second rods 31, 32 protrude from the bushings 10a, 10b. Since the further spacer element 11 is integral with the second portions 51b, 52b, it is close to the first portions 51a, 52a and rests on the second portion 40b of the locking element 40 to prevent the blade 20 from falling, by a sliding of the first and second rods 31, 32 towards the operating position.
  • the second portion 40b of the locking element 40 no longer support the further spacing element 11 and the first and second rods 31, 32 are made to slide (that is to say, the blade 20 is lowered) into the telescopic arms until the spacer element 10 rests on the first and second bushings 10a, 10b.
  • the second portion 51b, 52b of the telescopic arms is extracted from the first portion 51a, 52a whilst the shaped bar 60d of the engagement element 60 is still rested on the supporting protrusion 12 of the spacer element 10.
  • the first and second rods 31, 32 are made to slide further out of the telescopic arms until the upper ends 31a, 32a are retracted into the bushings 10a, 10b.
  • the shaped bar 60d of the engagement element 60 rests on a supporting protrusion 13 (similar to the supporting protrusion 12) of the further spacer element 11 whilst the horizontal bar 60c rests on the second portion 40b of the locking element 40.
  • the blade 20 may mix the mixture in an optimum manner.
  • the invention also relates to a vat "T" for the production of beer wort.
  • the vat “T” comprises a base wall 300 comprising filtering elements 301 configured for filtering a mixture and a side wall 400 defining, with the base wall 300, a containment space “V" for the mixture.
  • the vat “T” also comprises a shaft 500 extending, starting from a central portion of the base wall 300, along an axis of extension "X" transversal to the base wall 300,
  • the shaft 500 rotates about its axis of extension "X".
  • the vat “T” also comprises at least one supporting arm 200 engaged with the shaft 500 and extending radially to the shaft 500.
  • the vat "T” comprises two supporting arms 200 occupying positions angularly opposite each other relative to the shaft 500 ( Figure 3).
  • the vat “T” also comprises at least one stirring device 100 as described above.
  • the vat "T” comprises a stirring device 100.
  • the stirring device 100 is mounted in such a way that the direction of movement "M" is parallel to the axis of extension "X".
  • the invention achieves the preset aims eliminating the drawbacks of the prior art.
  • the stirring device 100 by means of the slidable rods and the telescopic arms, prevents scraping of the filtering bed of the vat by the blade.
  • the shape of the blade allows a fast and uniform distribution of the temperature inside the vat.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Organic Chemistry (AREA)
  • General Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
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  • Bioinformatics & Cheminformatics (AREA)
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  • Genetics & Genomics (AREA)
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  • Mixers Of The Rotary Stirring Type (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)

Abstract

Described is a device (100) for stirring a mixture, in particular a mixture for beer wort, comprising a first and a second bushing (10a, 10b) connected or connectable to a supporting arm (200) of a vat (T), a blade (20) configured for mixing the mixture and a first rod (31) and a second rod (32) parallel to each other and extending between an upper end (31a, 32a) and a lower end connected to the blade (20). The first and second rods (31, 21) are inserted in a slidable fashion in respective bushes (10a, 10b) in such a way as to be simultaneously movable by translation along an axial direction of movement (M) at least between a rest position and an operating position. The stirring device (100) also comprises a locking element (40) connected or connectable to the supporting arm (200) in such a way as to be interposed between the first and the second rods (31, 32). The locking element (40) being configured to define an end of stroke when the blade (20) is in the operating position and a point for supporting the blade (20) when the blade (20) is in the rest position.

Description

DESCRIPTION
DEVICE FOR STIRRING A MIXTURE
This invention relates to a device for stirring a mixture, in particular a mixture for beer wort, which is widely used in the beer production sector.
As is known, the production of beer wort is conventionally divided into four unitary steps (or operations).
The first step consists in mixing water with pure ground barley malt or together with other substitute cereals. Subsequently, the mixture, inside the mixing vat, is brought to different temperatures until reaching a maximum temperature of 76- 78°C in order to obtain, thanks to the endogenous enzymes present in the barley malt, the complete saccharification of the starches.
The second step is a filtration step which consists in separating the solid parts of the mixture (husk) from the liquid part (wort). The husks are removed and used as processing by-products for other uses. The mixture purified from the husk (also called the first wort), together with the washing waters, are transferred to the boiling vat.
The third step therefore consists in boiling the wort. During this step the hops are added, the wort is sterilised, some unwanted volatile substances are moved away and the wort is concentrated.
The fourth and last step is the step of separating the hot cloudy part in which the precipitates consisting of coagulated proteins and solid residues of the hops are moved away from the wort by centrifugal force.
The production plants for beer wort currently on the market comprise several vats where the steps described above are carried out.
In traditional systems, each step is carried out in a vat dedicated to it, which is optimised to perform the step in question. It is also known that, with a view to reducing the price and overall size of the systems, so-called "compact" systems have been introduced on the market in which some steps are carried out in the same vat, thus reducing the number of vats present in the system. Among the various possibilities for merging the steps in a single vat, one of the most frequent is that of carrying out the first step (that is, the mixing and mashing step) and the second step (that is, the filtration phase) in the same vat.
The main problem which is highlighted by this merging relates to the device for stirring the vat which must, on the one hand, provide an excellent mixing of the mixture and, on the other hand, a cutting of the husk during filtration without ruining the structure of the filtering bed of the vat.
In this situation, the first step is penalised in terms of efficiency since the stirring device, which is the result of the compromise, does not stir the mixture in an optimum manner with the consequence of not being able to have a fast and uniform distribution of the temperature inside the vat.
In this way, a product of lower quality is obtained.
The technical purpose of the invention is therefore to provide a stirring device for a mixture which is able to overcome the drawbacks of the prior art.
The aim of the invention is therefore to provide a stirring device which allows the first step and the second step to be performed in the same vat in an optimum manner.
A further aim of the invention is to provide a stirring device which avoids mixing the filtering bed of the vat during the filtering step.
A further aim of the invention is to provide a stirring device which allows a fast and uniform distribution of the temperature inside the vat during the mashing step. A further aim of the invention is to provide a stirring device which is practical and efficient in such a way as to obtain a high quality product.
The technical purpose indicated and the aims specified are substantially achieved by a device for stirring a mixture comprising the technical features described in one or more of the appended claims. The dependent claims correspond to possible embodiments of the invention.
Further features and advantages of the invention are more apparent in the nonlimiting description which follows of a non-exclusive embodiment of a device for stirring a mixture. The description is set out below with reference to the accompanying drawings which are provided solely for purposes of illustration without restricting the scope of the invention and in which:
Figures 1A to 1C are perspective views of the stirring device in different configurations of use;
Figure 2 is a front view of a stirring device inserted in a vat;
Figure 3 is a top view of the vat and of the stirring device located thereon.
With reference to the accompanying drawings, the numeral 100 denotes a device for stirring a mixture, in particular a mixture for beer wort.
The stirring device 100 comprises a first and a second bushing 10a, 10b connected or connectable to a supporting arm 200 of a vat “T”.
The term vat "T" is used to mean a vessel designed to perform the steps for obtaining the beer. In particular, in this description, the mixing and mashing and filtration steps are performed in the vat “T”.
The stirring device 100 comprises a blade 20 configured for mixing the mixture.
The stirring device 100 also comprises a first rod 31 and a second rod 32 parallel to each other and extending between an upper end 31a, 32a and a lower end connected to the blade 20.
The first and second rods 31, 32 are inserted in a slidable fashion in respective bushes 10a, 10b in such a way as to be simultaneously movable by translation along an axial direction of movement “M”, as described in detail below.
According to the preferred embodiment, the blade 20 comprises a base plate 20a extending on a plane transversal to the direction of movement "M". Preferably, the base plate 20a extends in a plane perpendicular to the direction of movement "M".
As shown in the accompanying drawings, the base plate 20 is connected to the lower ends of the first and second rods 31, 32.
Preferably, the base plate 20a has in cross section a shape delimited by a perimeter edge which follows a closed broken line forming two rectangular triangles aligned and having one side (adjacent to the right angle) in common.
The blade 20 also comprises a pair of first plates 20b', 20b" engaged, respectively, with the first and second rods 31, 32 close to the lower end 31b, 32b. The first plates 20b', 20b" define a plane transversal, preferably perpendicular, to the base plate 20a.
Preferably, the pair of first plates 20b', 20b" has a substantially rectangular shape wherein the larger dimension is transversal to the first and second rods 31, 32.
The blade 20 also comprises a pair of second plates 20c', 20c" extending from the perimeter edge of the base plate 20a towards the first plates 20b', 20b".
As shown in the accompanying drawings, the second plates 20c', 20c" are set at an angle to the base plate 20a to define an acute angle with the base plate 20a.
As shown in Figure 3, the base plate 20a comprises a first and a second hole 21. Preferably, the first and second holes 21 are substantially triangular in shape.
Even more preferably, the first and the second hole 21 are made close to the pair of second plates 20c', 20c".
Advantageously, the presence of the holes 21 makes the mixing operations simpler and more effective.
Advantageously, the presence of the holes 21 makes the blade 20 lighter and easier to handle.
According to the preferred embodiment, the blade 20 is made of AISI 304 steel or AISI 316 steel.
As shown in Figures 1A and 1C, the blade 20 is movable, along the direction of movement "M", at least between a rest position and an operating position.
In the rest position, the blade 20 is close to the bushings 10a, 10b and the upper end 31a, 32a of each rod 31, 32 protrudes from the respective bushing 10a, 10b (Figure 1C). In this situation, the blade 20 does not act on the mixture and there is no risk of scraping the bottom of the vat "T" and, in particular, its filtering elements 301.
In the operating position, on the other hand, the blade 20 is distal from the bushings 10a, 10b and the upper end 31a, 32a of each rod 31, 32 is retracted in the bushing 10a, 10b.
In this situation, the blade 20 is in a position close to the bottom of the vat "T", allowing an accurate mixing of the mixture contained therein. According to the preferred embodiment, the stirring device 100 also comprises a first and a second telescopic arm each extending, starting from a bushing 10a, 10b, parallel to the direction of movement "M".
The first and second telescopic arms are configured to allow a sliding insertion or extraction of the first and second rods 31, 32.
More specifically, the first and second telescopic arms each comprise a first portion 51a, 52a extending away from the bushings 10, 10b towards the blade 20 and a second portion 51b, 52b extending from the first portions 51a, 52a and slidably insertable in or extractable from the first portions 51a, 52a when the blade 20 is moved between the rest position and the operating position.
As shown in the accompanying drawings, the first and second rods 31, 32 and the first and second telescopic arms have, in cross section, a substantially circular shape. In this situation, the first portion 51a, 52a of the first and second telescopic arms and the second portion 5 lb, 52b of the first and second telescopic arms are hollow.
The first portion 51a, 52a also has a diameter larger than the respective second portion 51b, 52b of the first and second telescopic arms in such a way that the second portion 51b, 52b can be inserted or extracted from the first portion 51a, 52a. In the same way, the second portion 51b, 52b of each telescopic arm has a diameter greater than the diameter of the first and second rods 31, 32.
In use, therefore, at the moment of passage of the blade 20 from the operating position to the rest position, the first and second rods 31, 32 slide in respective second portions 51b, 52b of the telescopic arms. In this situation, the upper ends 31a, 32a protrude progressively from the bushings 10a, 10b (Figure IB). At a predetermined insertion depth of the first and second rods 31, 32, the second portions 51b, 52b also slide and are retracted into the first portions 51a, 52a whilst the upper ends 31a, 32a of the first and second rods 31, 32 are pushed towards the other in such a way as to protrude further from the bushings 10a, 10b (Figure 1C). Advantageously, the presence of the telescopic arms allows the first and second rods 31, 32, when the blade 20 is in the rest position, to not protrude excessively from the bushings 10a, 10b, avoiding excessively increasing the overall dimensions of the stirring device 100 and of the vat "T".
As shown in the accompanying drawings, the stirring device 100 also comprises a locking element 40 connected or connectable to the supporting arm 200 in such a way as to be interposed between the first and the second rods 31, 32.
The locking element 40 is configured to define an end of stroke when the blade 20 is in the operating position and to define a supporting point for the blade 20 when the blade 20 is in the rest position.
In other words, the locking element 40 prevents the blade 20 from sliding along the line of movement "M" beyond the operating position, preventing the blade 20 from striking against the base wall of the vat "T". The locking element 40 also prevents, when the blade 20 is in the rest position, that the latter slides in an uncontrolled and unwanted manner downwards, that is to say, towards the operating position.
According to the preferred embodiment, the locking element 40 comprises a first rectilinear portion 40a oriented, when the locking element 40 is connected to the supporting arm 200, parallel to the direction of movement “M”.
In particular, the first rectilinear portion 40a is inserted and fixed in a receiving seat made on the supporting arm 200 in a central position relative to the first and second bushings 10a, 10b. In this situation, the first rectilinear portion 40a is parallel to the direction of movement "M" and to the first and second rods 31, 32. Preferably, the first rectilinear portion 40a protrudes from the receiving seat from the part of the blade 20 by a length approximately equal to the length of the first portions 51a, 52a of the telescopic arms.
The locking element 40 also comprises a second portion 40b set at an angle to the first portion 40a.
Preferably, the second portion 40b forms a right angle with the first rectilinear portion 40a.
In more detail, as shown for example in Figure 1A, the second portion 40b is connected at the first rectilinear portion 40a at an end of the first rectilinear portion 40a facing towards the blade 20.
According to a possible embodiment, the second portion 40b is integrated with the first rectilinear portion 40a.
Alternatively, the second portion 40b is removably connectable to the first rectilinear portion 40a.
According to the preferred embodiment, the locking element 40 also comprises a third portion 40c connected at the first rectilinear portion 40a to an end of the first rectilinear portion 40a opposite that to which the second portion 40b is connected. Preferably, the third portion 40c has, in cross section, a dimension greater than that of the second portion 40b.
According to a possible embodiment, the first rectilinear portion 40a is rotatably associated with the receiving seat made on the supporting arm 200 in such a way as to rotate about its own axis of extension to orient the second portion 40b towards the blade 20 or in the opposite direction.
According to an aspect of the invention, the stirring device 100 also comprises an engagement element 60 integral with the blade 20.
The engagement element 60 is configured to abut on the locking element 40 following a movement of the blade 20 from the rest position to the operating position.
In particular, the engagement element 60 abuts against, during movement of the blade 20 from the rest position to the operating position, the second portion 40b of the locking element 40 in such a way as to prevent the blade 20 from sliding, along the line of movement "M", beyond the operating position.
According to the embodiment illustrated in the accompanying drawings, the engagement element 60 has a substantially upturned "U" shape and extends parallel to the direction of movement "M" towards the first and the second bushings 10a, 10b.
In more detail, the engagement element 60 has two vertical bars, 60a, 60b preferably having a circular cross-section, having an end integrated with the base plate 20a and extending along the direction of movement "M" towards the bushings 10a, 10b.
The engagement element 60 also comprises a horizontal bar 60c transversal to the vertical bars 60a, 60b and joining the vertical bars 60a, 60b to give the engagement element 60 the shape of an inverted "U" and to abut against the locking element 40 (and more specifically, against the second portion 40b) when the blade 20 passes from the rest position to the operating position.
In use, when it is necessary to mix the mixture in the vat "T", the blade 20 is moved from the rest position to the operating position.
In this situation, the first and second rods 31, 32 slide in the first and second telescopic arms along the direction of movement "M" and the telescopic arms are elongated.
The first and second rods 31, 32 slide until the upper ends 31a, 32a are retracted into the first and second bushings 10a, 10b.
During this movement, the engagement element 60 is also moved together with the blade 20. In this situation, during the descent of the blade 20 towards the operating position, the engagement element 60, and in particular the horizontal bar 60c strikes against the second portion 40b of the locking element 40. In this way, the horizontal bar 60c of the engagement element 60 abuts, resting, against the second portion 40b of the locking element 40 preventing further sliding of the blade 20 (Figure 1A) beyond the operating position.
When the blade 20 is moved from the operating position to the rest position, the first and second rods 31, 32 are retracted into the telescopic arms. In this situation, the horizontal bar 60c is raised away from the second portion 40b of the locking element 40. During movement of the blade 20, the upper ends 31a, 32a are progressively made to protrude from the first and second bushings 10a, 10b and the telescopic arms are shortened.
According to the preferred embodiment, the stirring device 100 comprises a spacer element 10 extending transversely to the direction of movement "M" and having the ends which can be engaged respectively with the first and second rods 31, 32.
In more detail, the spacer element 10 is perpendicular to the first and second rods
31, 32 and comprises a central horizontal portion at the ends of which there are two perforated circular portions designed to receive the first and second rods 31,
32, respectively, in a sliding fashion. As shown in the accompanying drawings, the spacer element 10 is positioned above the bushings 10a, 10b
In more detail, the perforated circular portions of the spacer element 10 are concentric relative to the first and second bushings 10a, 10b and rest on the first and second bushings 10a, 10b when the plate 20 is in the operating configuration.
According to an aspect of the invention, the spacer element 10 comprises a supporting protrusion 12.
Preferably, the supporting protrusion 12 is made in a central portion of the spacer element 10.
Even more preferably, the supporting protrusion 12 is made in the form of a bolt.
According to an aspect of the invention, the blade 20 is movable by translating along the direction of movement "M" between the rest position and an intermediate position (Figure IB) and between the intermediate position and the operating position or vice versa.
According to the preferred embodiment, the spacer element 10 can be gripped by an operator for manually moving the blade 20 from the operating position to the intermediate position.
As shown in Figure IB, in the intermediate position, the engagement element 60 abuts against the supporting protrusion 12 for supporting the blade 20, and in particular, to keep it in the intermediate position.
In more detail, as shown in Figure IB, the engagement element 60 comprises a shaped bar 60d positioned below the horizontal bar 60c and extending between the vertical bars 60a, 60b.
The shaped bar 60d is substantially in the shape of an upturned “V” in such a way as to engage the supporting protrusion 12 when the blade 20 is in an intermediate position.
In other words, when the blade 20 is in the intermediate position, the shaped bar 60d rests on and engages with the supporting protrusion 12 of the spacer element 10 in such a way that the blade 20 is supported and kept in the intermediate position.
As shown in Figure IB, in the intermediate position, the spacer element 10 has the ends resting on the bushings 10a, 10b from which protrude, at least partly, the upper ends 31a, 32a of the first and second rods 31, 32. In this situation, the shaped bar 60d of the engagement element 60 rests on the supporting protrusion 12 of the spacer element 10.
According to the preferred embodiment, the engagement element 60 comprises a gripping portion accessible to a user when the blade 20 is in an intermediate position.
The gripping portion can be gripped by a user for manually moving the blade 20 from the intermediate position to the rest position.
Preferably, the gripping portion coincides with the horizontal bar 60c of the engagement element 60.
According to an aspect of the invention, the stirring device 100 comprises a further spacer element 11 positioned below the first and the second bushings 10a,
10 and movable as one with the first and second rods 31, 32.
Preferably, the further spacer element 11 is engaged with the second portions 5 lb, 52b of the first and second telescopic arms.
Even more preferably, the further spacer element 11 is fixed and integral with a lower end (that is, facing towards the blade 20) of the second portions 5 lb, 52b of the first and second telescopic arms in such a way that an extraction of the second portions 51b, 52b from the first portions 51a, 52a corresponds to a lowering of the further spacer element 11, whilst a retraction of the second portions 51b, 52b in the first portions 51a, 52a corresponds to a raising of the further spacer element 11.
The further spacer element 11 can be engaged with the locking element 40 to keep the blade 20 in the rest position.
In particular, as shown in Figure 1C, the second portion 40b of the locking element 40 is configured to act as a support on which the further spacer element
11 is rested when the blade 20 is in the rest position.
In other words, in the rest position, the further spacer element 11 rests on the second portion 40b of the locking element 40 in such a way that the blade 20 cannot descend in an uncontrolled manner towards the operating position. In this situation, the shaped bar 60d of the engagement element 60 rests on the supporting portion 12 of the spacer element 10 whilst the spacer element 10 is raised relative to the first and second bushings 10a, 10b.
In use, in the rest position, the blade 20 is close to the first and second bushings 10a, 10b. In this situation, the second portion 51b, 52b of the telescopic arms is inserted in the first portion 51a, 52a and the first and second rods 31, 32 protrude from the bushings 10a, 10b. Since the further spacer element 11 is integral with the second portions 51b, 52b, it is close to the first portions 51a, 52a and rests on the second portion 40b of the locking element 40 to prevent the blade 20 from falling, by a sliding of the first and second rods 31, 32 towards the operating position.
In the rest position, the upper ends 31a, 32a of the first and second rods 31, 32 protrude from the first and second bushings 10a, 10b and the spacer element 10 is raised relative to the bushings 10a, 10b.
In this situation, the shaped bar 60d of the engagement element 60 is rested on the supporting protrusion 12 of the spacer element 10.
When the blade 20 passes from the rest position to the intermediate position, the second portion 40b of the locking element 40 no longer support the further spacing element 11 and the first and second rods 31, 32 are made to slide (that is to say, the blade 20 is lowered) into the telescopic arms until the spacer element 10 rests on the first and second bushings 10a, 10b.
In this situation, the second portion 51b, 52b of the telescopic arms is extracted from the first portion 51a, 52a whilst the shaped bar 60d of the engagement element 60 is still rested on the supporting protrusion 12 of the spacer element 10. During the passage of the blade 20 from the intermediate position to the operating position, the first and second rods 31, 32 are made to slide further out of the telescopic arms until the upper ends 31a, 32a are retracted into the bushings 10a, 10b. In this situation, the shaped bar 60d of the engagement element 60 rests on a supporting protrusion 13 (similar to the supporting protrusion 12) of the further spacer element 11 whilst the horizontal bar 60c rests on the second portion 40b of the locking element 40. In this situation, the blade 20 may mix the mixture in an optimum manner.
The invention also relates to a vat "T" for the production of beer wort.
The vat "T" comprises a base wall 300 comprising filtering elements 301 configured for filtering a mixture and a side wall 400 defining, with the base wall 300, a containment space "V" for the mixture.
The vat "T" also comprises a shaft 500 extending, starting from a central portion of the base wall 300, along an axis of extension "X" transversal to the base wall 300,
The shaft 500 rotates about its axis of extension "X".
The vat "T" also comprises at least one supporting arm 200 engaged with the shaft 500 and extending radially to the shaft 500.
According to a possible embodiment, the vat "T" comprises two supporting arms 200 occupying positions angularly opposite each other relative to the shaft 500 (Figure 3).
The vat "T" also comprises at least one stirring device 100 as described above.
Preferably, for each supporting arm 200, the vat "T" comprises a stirring device 100.
In particular, the stirring device 100 is mounted in such a way that the direction of movement "M" is parallel to the axis of extension "X".
The invention achieves the preset aims eliminating the drawbacks of the prior art.
In particular, the stirring device 100, by means of the slidable rods and the telescopic arms, prevents scraping of the filtering bed of the vat by the blade.
The shape of the blade allows a fast and uniform distribution of the temperature inside the vat.

Claims

1. A device (100) for stirring a mixture, in particular a mixture for beer wort, comprising:
- a first and a second bushing (10a, 10b) connected or connectable to a supporting arm (200) of a vat (T);
- a blade (20) designed for mixing said mixture;
- a first rod (31) and a second rod (32) parallel to each other and extending between an upper end (3 la, 32a) and a lower end connected to the blade (20); the first and the second rod (31, 32) being inserted in a slidable fashion in respective bushings (10a, 10b) in such a way as to be simultaneously movable in translation along an axial direction of movement (M) at least between a rest position, wherein the blade (20) is close to said first and second bushings (10a, 10b) and the upper end (31a, 32a) of each rod (31, 32) protrudes from the respective bushing (10a, 10b), and an operating position, wherein the blade (20) is distal from the first and second bushings (10a, 10b) and the upper end (31a, 32a) of each rod (31, 32) is retracted in the respective bushing (10a, 10b);
- a locking element (40) connected or connectable to said supporting arm (200) in such a way as to be interposed between the first and the second rod (31, 32), the locking element (40) being configured to define a stroke limit stop when said blade (20) is in the operating position and a supporting point for the blade (20) when said blade (20) is in the rest position.
2. The device according to claim 1, comprising a first and a second telescopic arm each extending, starting from a bushing (10a, 10b), parallel to said direction of movement (M), the first and second telescopic arms being configured to allow a sliding insertion or extraction of said first and second rods (31, 32), the first and the second telescopic arm each comprising:
- a first portion (51a, 52a) extending away from said first and second bushing (10, 10b) towards said blade (20);
- a second portion (51b, 52b) extending from said first portion (51a, 52a) and slidably insertable in or extractable from said first portion (51a, 52a) when the blade (20) is moved between the rest position and the operating position.
3. The device according to claim 1 or 2, comprising an engagement element (60) integral with said blade (20), said engagement element (60) being configured to abut against the locking element (40) following a movement of the blade (20) from said rest position to said operating position.
4. The device according to claim 3, wherein the engagement element (60) is substantially in the shape of an upturned "U" and extends parallel to the direction of movement (M) towards said first and second bushings (10a, 10b).
5. The device according to any one of the preceding claims, comprising a spacer element (10) extending transversely to the direction of motion (M) and having the ends engageable, respectively, with the first and second rods (31, 32), said spacer element (10) being positioned above said first and second bushings (10a, 10b) and comprising a supporting protrusion (12).
6. The device according to claim 5 when it depends on claim 3, wherein said blade (20) is movable translationally along the direction of movement (M) between the rest position and an intermediate position, wherein the engagement element (60) is abutted against said supporting protrusion (12) to support said blade (20), and between said intermediate position and the operating position or vice versa.
7. The device according to claim 6, wherein the engagement element (60) comprises a gripping portion accessible to a user when said blade (20) is in the intermediate position, said gripping portion being able to be gripped by a user for manually moving said blade (20) from the intermediate position to the rest position.
8. The device according to claim 6 or 7, wherein said spacer element (10) can be 15 gripped by an operator for manually moving said blade (20) from the operating position to the intermediate position.
9. The device according to any one of the preceding claims, comprising a further spacer element (11) positioned below the bushings (10a, 10b) and movable as one with the first and the second rod (31, 32), the further spacer element (11) being engageable with said locking element (40) for keeping said blade (20) in the rest position.
10. The device according to any one of the preceding claims, said locking element (40) comprising:
- a first rectilinear portion (40a) oriented, when the locking element (40) is connected to the supporting arm (200), parallel to the direction of movement (M);
- a second portion (40b) set at an angle to said first portion (40a), preferably forming a right angle with said first portion (40a).
11. The device according to claim 10 when it depends on claim 3 or 4, wherein said second portion (40b) is configured to act as a mechanical abutment for the engagement element (60) following a movement of the blade (20) from the rest position to the operating position.
12. The device according to claim 10 when it depends on claim 9, wherein said second portion (40b) is configured to act as a support on which said further spacer element (11) is resting when said blade (20) is in the rest position.
13. The device according to any one of the preceding claims, wherein said blade (20) comprises:
- a base plate (20a) extending on a plane transversal to said direction of movement (M), said base plate (20) being connected to the lower ends (31b, 32b) of the first and second rods (31, 32);
- a pair of first plates (20b', 20b") engaged respectively with the first and second 16 rods (31, 32) close to the lower end (31b, 32b), the first plates (20b', 20b") defining a plane transversal, preferably perpendicular, to said base plate (20a);
- a pair of second plates (20c', 20c") extending from a perimeter edge of said base plate (20a) towards said first plates (20b', 20b"), the second plates (20c', 20c") being set at an angle to said base plate (20a) to define an acute angle with said base plate (20a).
14. The device according to claim 13, wherein said base plate (20a) comprises a first and a second hole (21), preferably substantially triangular in shape, the first and the second hole (21) being made close to the pair of second plates (20c', 20c").
15. A vat (T) for the production of beer wort, comprising:
- a base wall (300) comprising filtering elements (301) configured for filtering a mixture;
- a side wall (400) defining, with the base wall (300), a containment space (V) for said mixture;
- a shaft (500) extending, starting from a central portion of said base wall (300), along an axis of extension (X) transversal to the base wall (300), said shaft (500) rotating about its own axis of extension (X);
- at least one supporting arm (200) engaged with said shaft (500) and extending radially to said shaft (500);
- a device (100) according to any one of the preceding claims; wherein the direction of movement (M) is parallel to the axis of extension (X).
PCT/IB2022/061836 2021-12-13 2022-12-06 Device for stirring a mixture WO2023111773A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT102021000031178 2021-12-13
IT102021000031178A IT202100031178A1 (en) 2021-12-13 2021-12-13 MIXTURE MIXER DEVICE

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH248471A (en) * 1946-03-09 1947-05-15 R Keller Andreas Mash tun.
US2513765A (en) * 1947-06-18 1950-07-04 Cream City Boiler Company Mashing and lautering apparatus for brewing
US4773312A (en) * 1986-11-07 1988-09-27 Anton Steinecker Maschinenfabrik Gmbh Clarifying vat

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH248471A (en) * 1946-03-09 1947-05-15 R Keller Andreas Mash tun.
US2513765A (en) * 1947-06-18 1950-07-04 Cream City Boiler Company Mashing and lautering apparatus for brewing
US4773312A (en) * 1986-11-07 1988-09-27 Anton Steinecker Maschinenfabrik Gmbh Clarifying vat

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