EP0071906B1 - Household grain-mill - Google Patents

Household grain-mill Download PDF

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Publication number
EP0071906B1
EP0071906B1 EP82106899A EP82106899A EP0071906B1 EP 0071906 B1 EP0071906 B1 EP 0071906B1 EP 82106899 A EP82106899 A EP 82106899A EP 82106899 A EP82106899 A EP 82106899A EP 0071906 B1 EP0071906 B1 EP 0071906B1
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EP
European Patent Office
Prior art keywords
grindstone
depressions
mill according
grindstones
grinding
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EP82106899A
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German (de)
French (fr)
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EP0071906A3 (en
EP0071906A2 (en
Inventor
Hilmar A. Dr.-Ing. Burggrabe
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Individual
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Individual
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Priority to AT82106899T priority Critical patent/ATE22233T1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C7/00—Crushing or disintegrating by disc mills
    • B02C7/11—Details
    • B02C7/12—Shape or construction of discs
    • B02C7/13—Shape or construction of discs for grain mills

Definitions

  • the invention relates to a household grain mill according to the preamble of claim 1.
  • a grinder with grinding stones of the type mentioned is known from DE-PS 29 476.
  • the known grinder only relatively dry and low-fat ground material can be ground with a sufficiently satisfactory result. If this is not the case, the moist and / or greasy ground material leads to smearing of the grinding stones, the grinding process of the grinding material being impaired to such an extent that the mill has to be switched off and the grinding stones have to be cleaned. In such cases, the frictional resistance between the grindstones increases so much that either the grinder or the motor can be damaged if repaired, which requires repairs.
  • the invention is therefore based on the object of creating a household mill which grinds the ground material independently of its moisture and its fat content.
  • the invention consists first of all in the finding that in the known mill there are radially continuous grinding beams which form grinding surfaces between the depressions, between which the ground material is crushed, which leads to smearing with moist and oily ground material with its disadvantageous consequences.
  • the invention can also be used to grind a very finely ground whole grain product from a moist and / or oil-containing ground material if the relative speed of rotation of the grinding stones to one another is very low, that is if, for. B. with a stationary millstone the other rotates only at low speed. This largely avoids heating the ground material.
  • one of the two grinding stones is axially displaceable and spring-mounted.
  • the elastic resilience of the grinding stone ensures that the resulting grinding pressure regulates itself during the grinding process and thus enables the ground material to be ground more gently and gently.
  • the regrind has an extremely high proportion of very fine particles.
  • the resilient mounting if the material to be ground contains pebbles, for example, the adjustable minimum distance between the two grinding stones is automatically increased and the grinding mechanism is therefore not damaged.
  • both grinding stones are arranged one above the other coaxially to a vertical axis and the upper grinding stone is provided with the central opening, so that the centrifugal forces during grinding can act undisturbed by gravity.
  • the mill mainly consists of a drive 5, which comprises an electric motor and a toothed belt transmission within a housing, a grinder 6 in the preferred embodiment, a funnel 7 for filling in the ground material and a flour outlet 8.
  • the grinder 6 has a stationary axis 10 with a vertical longitudinal axis 12, which carries two hubs 14 and 16 of a lower grinding stone 18 or upper grinding stone 20.
  • the hub 14 of the rotatable grinding stone 18 is seated in a rotationally fixed manner on a hollow drive shaft 21 receiving the axis 10 coaxially, while the hub 16 of the quasi-stationary grinding stone 20 is mounted on the axis 10 for the purpose of centering.
  • the upper hub 16 is perforated so that cereal grains from the funnel 7 between the two grinding stones 18 and 20 can reach.
  • the lower hub is open after screws 22 have been inserted, so that cereal grains cannot fall through.
  • the width of the gap 24 between the two grinding stones 18 and 20 can be changed in accordance with the grain size by axially adjusting the upper grinding stone 20 which is rotatably mounted for this purpose.
  • the lower grinding stone 18 is axially displaceable and supported by a spring 26 which limits the axial grinding pressure at the top.
  • the lower grinding stone 18 shown in FIG. 2 with its hub 14 is largely in the form of a circular disk and consists of finely crystallized primary rock emery bonded with burnt magnesite rock.
  • the lower grindstone 18 On its upper side facing the upper grindstone 20, the lower grindstone 18 is provided with five borders 28 distributed uniformly around the shaft axis 12, the depth of which decreases radially outwards and which are surrounded by a radially outer ring surface 30 which is perpendicular to the shaft axis 12 penetrated level.
  • Each of the identically designed steps 28 has an asymmetrical cross-sectional profile (see FIG.
  • the trailing flank 36 of a preceding flank 28 at the leading flank 34 of the following boundary 28 ends along an edge 38, the axial projection of which on a plane perpendicularly penetrated by the shaft axis 12, for example the plane of the annular surface 30, extends tangentially to the radially inner circumference of the grinding stone 18 and the forward and trailing flanks 34 and 36 of the borders 28 are arranged partly in and partly below a concave conical surface, the cone axis of which is the shaft axis 12, and end radially on the inside on a flat ring edge 40.
  • the upper limit of the top of the grinding stone 18 due to the conical surface mentioned arises from the fact that a conical turning takes place during the manufacture of the pressing tool for the grinding stone.
  • the trailing, flatter flanks 36 of the borders 28 have approximately the shape of circular sectors which form a fan around the hub 14.
  • the upper millstone 20 is designed exactly like the lower millstone 18 described, although it could be configured differently, for example with azimuthally shortened flanks 36 and without breaking the edge 38 on the inner circumference of the millstone.
  • both grinding stones can be driven at different speeds in a common direction of rotation.

Abstract

A household grain mill includes a mill in which the grinding surfaces of the millstones (18, 20) are provided with recesses (28) which extend from the inside toward the outside with decreasing depth and which crack grain fed through a central opening and lead it to an outer grinding zone. The recesses (28) have an asymmetrical cross-sectional shape with two flanks (34, 36), of which the leading flank (34) is steeper than the trailing flank (36) and, together with the flatter flank (36) of the preceeding recess (28), forms an edge (38) which runs tangentially to the periphery of the central opening.

Description

Die Erfindung betrifft eine Haushaltsgetreidemühle nach dem Oberbegriff des Anspruchs 1.The invention relates to a household grain mill according to the preamble of claim 1.

Ein Mahlwerk mit Mahlsteinen der genannten Art ist durch die DE-PS 29 476 bekannt. Bei dem bekannten Mahlwerk kann nur verhältnismässig trockenes und fettarmes Mahlgut mit hinreichend zufriedenstellendem Ergebnis gemahlen werden. Ist dies nicht der Fall, führt das feuchte und/oder fettige Mahlgut zu einem Verschmieren der Mahlsteine, wobei der Mahlvorgang des Mahlgutes so stark beeinträchtigt wird, dass man die Mühle abschalten und die Mahlsteine einer Reinigung unterziehen muss. Der Reibungswiderstand zwischen den Mahlsteinen nimmt in solchen Fällen so stark zu, dass bei Weiterbetrieb entweder das Mahlwerk oder der Motor Schäden erleiden können, die Reparaturen erfordern.A grinder with grinding stones of the type mentioned is known from DE-PS 29 476. In the known grinder, only relatively dry and low-fat ground material can be ground with a sufficiently satisfactory result. If this is not the case, the moist and / or greasy ground material leads to smearing of the grinding stones, the grinding process of the grinding material being impaired to such an extent that the mill has to be switched off and the grinding stones have to be cleaned. In such cases, the frictional resistance between the grindstones increases so much that either the grinder or the motor can be damaged if repaired, which requires repairs.

Mit der vorbekannten Mühle ist somit das Mahlen von Ölsaaten, wie z.B. Mohn, Leinsamen und Sesam, mit zufriedenstellendem Ergebnis nahezu ausgeschlossen. Um beim Mahlen von Getreidefrüchten, wie z. B. Weizen, Roggen, Gerste und Hafer, sicherzugehen, dass diese nicht im feuchten Zustand in das Mahlwerk gelangen, ist vor Mahlbeginn grundsätzlich eine mehrwöchige Trockenlagerung in trockenen Räumen oder eine künstliche Trocknung im Ofen empfehlenswert.The grinding of oil seeds, e.g. Poppy seeds, flax seeds and sesame seeds, with a satisfactory result almost impossible. In order to grind cereals, such as. B. Wheat, rye, barley and oats, to ensure that they do not get into the grinder when wet, we recommend dry storage in dry rooms for several weeks or artificial drying in the oven.

Der Erfindung liegt daher die Aufgabe zu Grunde, eine Haushaltsmühle zu schaffen, welche das Mahlgut unabhängig von seiner Feuchtigkeit und seinem Fettgehalt bestens mahlt.The invention is therefore based on the object of creating a household mill which grinds the ground material independently of its moisture and its fat content.

Diese Aufgabe ist erfindungsgemäss durch die im Patentanspruch 1 genannten Merkmale gelöst.This object is achieved by the features mentioned in claim 1.

Die Erfindung besteht zunächst in der Feststellung, dass bei der bekannten Mühle radial durchgehende Mahlbalken vorhanden sind, die zwischen den Vertiefungen Mahlflächen bilden, zwischen denen das Mahlgut zerquetscht wird, was bei feuchtem und öligem Mahlgut zum Verschmieren mit seinen nachteiligen Folgen führt.The invention consists first of all in the finding that in the known mill there are radially continuous grinding beams which form grinding surfaces between the depressions, between which the ground material is crushed, which leads to smearing with moist and oily ground material with its disadvantageous consequences.

Bei der erfindungsgemässen Lösung werden zwischen den Vertiefungen radiale Mahlflächen vermieden, in denen das Mahlgut gequetscht wird. Auf den flacheren Flanken der Vertiefungen wird das Mahlgut durch Reibung der Mahlgutteile miteinander und mit den Steinen langsam und schonend zerrieben und gelangt dann über die Begrenzungskanten in die jeweils nächste Vertiefung, wobei beim Überschreiten der Kante ein Quetschen des auf der flacheren Flanke zerriebenen Mahlgutes nicht zu einem Verschmieren führt, so dass auch öliges Mahlgut und solches mit einem höheren Feuchtigkeitsgehalt gemahlen werden kann.In the solution according to the invention, radial grinding surfaces in which the ground material is squeezed are avoided between the depressions. On the flatter flanks of the wells, the regrind is slowly and gently rubbed together by rubbing the regrind parts with each other and with the stones and then reaches the next deepening over the boundary edges, whereby when the edge is crossed there is no crushing of the grist ground on the flatter flank leads to smearing, so that oily ground material and material with a higher moisture content can also be ground.

Durch die Erfindung kann also auch dann aus einem feuchten und/oder ölhaltigen Mahlgut ein sehr fein gemahlenes Vollkornerzeugnis gemahlen werden, wenn die relative Umlaufgeschwindigkeit der Mahlsteine zueinander sehr klein ist, wenn also z. B. bei einem stillstehenden Mahlstein der andere nur niedrigtourig umläuft. Dadurch wird ein Erhitzen des Mahlgutes weitgehend vermieden.The invention can also be used to grind a very finely ground whole grain product from a moist and / or oil-containing ground material if the relative speed of rotation of the grinding stones to one another is very low, that is if, for. B. with a stationary millstone the other rotates only at low speed. This largely avoids heating the ground material.

Bei einer bevorzugten Ausführungsform ist einer der beiden Mahlsteine axial verschiebbar und gefedert gelagert. Dabei wird durch die elastische Nachgiebigkeit des Mahlsteines erreicht, dass der entstehende Mahldruck beim Mahlvorgang sich selbst regelt und damit ein noch schonenderes und weicheres Vermahlen des Mahlgutes ermöglicht wird. Die Folge hiervon ist, dass das Mahlgut einen überaus hohen Anteil an Feinstteilen aufweist. Des weiteren wird durch die federnde Lagerung erreicht, dass, wenn das Mahlgut beispielsweise Steinchen enthält, sich der einstellbare Mindestabstand der beiden Mahlsteine voneinander automatisch vergrössert und das Mahlwerk somit keinen Schaden nimmt.In a preferred embodiment, one of the two grinding stones is axially displaceable and spring-mounted. The elastic resilience of the grinding stone ensures that the resulting grinding pressure regulates itself during the grinding process and thus enables the ground material to be ground more gently and gently. The consequence of this is that the regrind has an extremely high proportion of very fine particles. Furthermore, due to the resilient mounting, if the material to be ground contains pebbles, for example, the adjustable minimum distance between the two grinding stones is automatically increased and the grinding mechanism is therefore not damaged.

Bei der bevorzugten Ausführungsform der erfindungsgemässen Mühle sind beide Mahlsteine koaxial zu einer vertikalen Achse übereinander angeordnet und der obere Mahlstein ist mit dem zentralen Durchbruch versehen, so dass die Zentrifugalkräfte beim Mahlen von der Schwerkraft ungestört wirksam werden können.In the preferred embodiment of the mill according to the invention, both grinding stones are arranged one above the other coaxially to a vertical axis and the upper grinding stone is provided with the central opening, so that the centrifugal forces during grinding can act undisturbed by gravity.

Dadurch wird in einfacher Weise eine gleichmässige Verteilung des Mahlgutes zwischen den Mahlsteinen und insbesondere zwischen den Mahlflächen und damit auch ein besseres Mahlergebnis erreicht. Bei einer anderen, ebenfalls denkbaren Anordnung der beiden Mahlsteine, z.B. koaxiale Anordnung zu einer horizontalen Achse, wäre dies nicht mehr gewährleistet, da dann durch die Schwerkraft ein grösserer Anteil des Mahlgutes sich im unteren Bereich zwischen den Mahlsteinen befinden würde.As a result, a uniform distribution of the ground material between the grinding stones and in particular between the grinding surfaces and thus also a better grinding result is achieved in a simple manner. In another, also conceivable arrangement of the two grinding stones, e.g. Coaxial arrangement to a horizontal axis, this would no longer be guaranteed, because then a greater proportion of the material to be ground would be in the lower area between the grinding stones due to gravity.

Im folgenden ist die Erfindung an Hand der durch die Zeichnung beispielhaft dargestellten, bevorzugten Ausführungsform des erfindungsgemässen Mahlwerkes im einzelnen erläutert.The invention is explained in detail below with reference to the preferred embodiment of the grinder according to the invention, which is shown by way of example in the drawing.

Es zeigen:

  • Fig. 1 einen zentralen Vertikalschnitt durch eine Haushaltsgetreidemühle mit der Ausführungsform;
  • Fig. 2 eine perspektivische Ansicht eines Mahlsteines der Ausführungsform, wobei die Punktierung Darstellungsmittel ist und nichts über die Rauhigkeit des Steines aussagt; und
  • Fig. 3 die Abwicklung eines Schnittes längs der Kreislinie, die in Fig. 1 durch ihren Kreisbogen 111-111 teilweise dargestellt ist.
Show it:
  • 1 shows a central vertical section through a household grain mill with the embodiment.
  • Fig. 2 is a perspective view of a grindstone of the embodiment, wherein the dotting is a means of representation and says nothing about the roughness of the stone; and
  • Fig. 3 shows the development of a section along the circular line, which is partially shown in Fig. 1 by its circular arc 111-111.

Die Mühle besteht hauptsächlich aus einem Antrieb 5, der innerhalb eines Gehäuses einen Elektromotor und ein Zahnriemengetriebe umfasst, aus einem Mahlwerk 6 in der bevorzugten Ausführungsform, aus einem Trichter 7 zum Einfüllen des Mahlgutes und aus einem Mehl-Auslauf 8.The mill mainly consists of a drive 5, which comprises an electric motor and a toothed belt transmission within a housing, a grinder 6 in the preferred embodiment, a funnel 7 for filling in the ground material and a flour outlet 8.

Das Mahlwerk 6 weist eine stillstehende Achse 10 mit vertikaler Längsachse 12 auf, welche zwei Naben 14 und 16 eines unteren Mahlsteines 18 bzw. oberen Mahlsteines 20 trägt. Die Nabe 14 des drehbaren Mahlsteines 18 sitzt drehfest auf einer die Achse 10 koaxial aufnehmenden hohlen Antriebswelle 21, während die Nabe 16 des quasistationären Mahlsteines 20 zwecks Zentrierung auf der Achse 10 gelagert ist. Die obere Nabe 16 ist durchbrochen, damit Getreidekörner aus dem Trichter 7 zwischen die beiden Mahlsteine 18 und 20 gelangen können. Dagegen ist die untere Nabe nach Einsetzen von Schrauben 22 undurchbrochen, damit Getreidekörner nicht durchfallen können.The grinder 6 has a stationary axis 10 with a vertical longitudinal axis 12, which carries two hubs 14 and 16 of a lower grinding stone 18 or upper grinding stone 20. The hub 14 of the rotatable grinding stone 18 is seated in a rotationally fixed manner on a hollow drive shaft 21 receiving the axis 10 coaxially, while the hub 16 of the quasi-stationary grinding stone 20 is mounted on the axis 10 for the purpose of centering. The upper hub 16 is perforated so that cereal grains from the funnel 7 between the two grinding stones 18 and 20 can reach. On the other hand, the lower hub is open after screws 22 have been inserted, so that cereal grains cannot fall through.

Der Spalt 24 zwischen den beiden Mahlsteinen 18 und 20 kann durch axiale Verstellung des dazu drehbar gelagerten oberen Mahlsteines 20 in seiner Breite entsprechend der Korngrösse verändert werden. Der untere Mahlstein 18 ist axial verschiebbar und mittels einer Feder 26 gelagert, die den axialen Mahldruck oben begrenzt.The width of the gap 24 between the two grinding stones 18 and 20 can be changed in accordance with the grain size by axially adjusting the upper grinding stone 20 which is rotatably mounted for this purpose. The lower grinding stone 18 is axially displaceable and supported by a spring 26 which limits the axial grinding pressure at the top.

Der in Fig. 2 mit seiner Nabe 14 gezeigte untere Mahlstein 18 ist im grossen und ganzen kreisscheibenringförmig und besteht aus feinkristallisiertem, mit gebranntem Magnesit-Gestein gebundenem Urgestein-Schmirgel. Auf seiner dem oberen Mahlstein 20 zugekehrten Oberseite ist der untere Mahlstein 18 mit fünf gleichmässig um die Wellenachse 12 verteilten Schrenzen 28 versehen, deren Tiefe radial nach aussen abnimmt und die von einer radial äusseren Ringfläche 30 umgeben sind, die in einer von der Wellenachse 12 senkrecht durchstossenen Ebene liegt. Jede der gleich ausgebildeten Schrenzen 28 weist ein am Grund 32 gerundetes asymmetrisches Querschnittsprofil (siehe Fig. 3) mit einer in Drehrichtung 9 der Antriebswelle 10 vorauslaufenden steileren Flanke 34 und mit einer nachlaufenden flacheren Flanke 36 auf, wobei die nachlaufende Flanke 36 einer vorausgehenden Schrenze 28 an der vorauslaufenden Flanke 34 der folgenden Schrenze 28 längs einer Kante 38 endet, deren axiale Projektion auf eine von der Wellenachse 12 senkrecht durchstossene Ebene, beispielsweise die Ebene der Ringfläche 30, tangential zum radial inneren Umfang des Mahlsteines 18 verläuft und wobei die vor- und nachlaufenden Flanken 34 bzw. 36 der Schrenzen 28 teils in- und teils unterhalb einer konkaven Kegelfläche angeordnet sind, deren Kegelachse die Wellenachse 12 ist, und radial innen an einer ebenen Ringkante 40 enden. Die obere Begrenzung der Oberseite des Mahlsteines 18 durch die erwähnte Kegelfläche kommt dadurch zustande, dass bei der Herstellung des Presswerkzeuges für den Mahlstein eine konische Abdrehung erfolgt. Wie Fig. 2 zeigt, haben die nachlaufenden flacheren Flanken 36 der Schrenzen 28 ungefähr die Gestalt von Kreissektoren, die um die Nabe 14 einen Fächer bilden. Der obere Mahlstein 20 ist genau wie der beschriebene untere Mahlstein 18 ausgebildet, obwohl er anders ausgestaltet sein könnte, beispielsweise mit azimutal verkürzten Flanken 36 und ohne Brechung der Kante 38 am inneren Umfang des Mahlsteines.The lower grinding stone 18 shown in FIG. 2 with its hub 14 is largely in the form of a circular disk and consists of finely crystallized primary rock emery bonded with burnt magnesite rock. On its upper side facing the upper grindstone 20, the lower grindstone 18 is provided with five borders 28 distributed uniformly around the shaft axis 12, the depth of which decreases radially outwards and which are surrounded by a radially outer ring surface 30 which is perpendicular to the shaft axis 12 penetrated level. Each of the identically designed steps 28 has an asymmetrical cross-sectional profile (see FIG. 3) rounded at the base 32 with a steeper flank 34 leading in the direction of rotation 9 of the drive shaft 10 and with a trailing flatter flank 36, the trailing flank 36 of a preceding flank 28 at the leading flank 34 of the following boundary 28 ends along an edge 38, the axial projection of which on a plane perpendicularly penetrated by the shaft axis 12, for example the plane of the annular surface 30, extends tangentially to the radially inner circumference of the grinding stone 18 and the forward and trailing flanks 34 and 36 of the borders 28 are arranged partly in and partly below a concave conical surface, the cone axis of which is the shaft axis 12, and end radially on the inside on a flat ring edge 40. The upper limit of the top of the grinding stone 18 due to the conical surface mentioned arises from the fact that a conical turning takes place during the manufacture of the pressing tool for the grinding stone. As FIG. 2 shows, the trailing, flatter flanks 36 of the borders 28 have approximately the shape of circular sectors which form a fan around the hub 14. The upper millstone 20 is designed exactly like the lower millstone 18 described, although it could be configured differently, for example with azimuthally shortened flanks 36 and without breaking the edge 38 on the inner circumference of the millstone.

Die einander am Spalt 24 parallel gegenüberstehenden zwei Ringflächen 30 der beiden Mahlsteine 18 und 20 bilden eine Mahlzone, in welche die durch die Nabe 16 auf die Nabe 14 gefallenen Getreidekörner nach Vorbrechung durch die Schrenzen 28 unter dem Einfluss von Trägheits-und Reibungskräften gelangen.The two annular surfaces 30 of the two grinding stones 18 and 20, which face each other in parallel at the gap 24, form a grinding zone into which the grain kernels which have fallen onto the hub 14 through the hub 16 enter after being interrupted by the steps 28 under the influence of inertia and frictional forces.

Um die Zentrifugalkraft beim Mahlen zu vergrössern, können beide Mahlsteine mit verschiedenen Umlaufgeschwindigkeiten in einer gemeinsamen urehrichtung antreibbar sein.In order to increase the centrifugal force during grinding, both grinding stones can be driven at different speeds in a common direction of rotation.

Claims (8)

1. Household grain mill having two annular grindstones (18, 20) consisting of bonded emery stone, of which at least one grindstone (18) is mounted to rotate about the common axis (12) in relation to the other grindstone while the grinding surface of at least one grindstone has distributed evenly around its axis (12) a plurality of depressions (28) which are defined by edges (38) which extend substantially tangentially in relation to a radial inner circle (40), the depressions being narrow and deep at their radially inner commencement but running out into a shallow and broad configuration towards the periphery into an outer grinding zone constituted by mutually parallel outer annular surfaces (30) of both grindstones (18, 20) which extend around the depressions (28), characterized in that the depressions (28) have an asymmetrical cross-sectional profile with two flanks (34, 36) of which the flank (34) which leads during relative rotation of the grindstone (18) is steeper than the other flatter flank (36) and forms with the flatter flank (36) of the leading depression (28) the edge (38) which defines both adjacent depressions (28) so that all depressions (28) are separated from one another only by the defining edges (38).
2. Mill according to Claim 1, characterized in that to introduce into the depressions (28) the materials which are to be ground, the grinding surface of at least one grindstone (18, 20) is defined in its central area by an imaginary concave frustoconical surface enclosing the aperture in one grindstone and ending at a radially inner planar annular edge (40).
3. Mill according to Claim 1 or 2, characterized in that both flanks (34 and 36) of the depression merge into each other via a rounded bottom (32).
4. Mill according to one of Claims 1 to 3, characterized in that both grindstones are superposed and are coaxial in relation to a vertical axis (12), the upper grindstone (20) being provided with the central aperture.
5. Mill according to one of Claims 1 to 4, characterized in that one (18) of the two grindstones (18, 20) is mounted for axial displacement and is sprung (26).
6. Mill according to Claim 4 and 5, characterized in that both grindstones (18, 20) are of identical construction and in that the lower grindstone (18) is connected in rotationally rigid fashion to a hub (14) which occludes its central aperture, the hub being connected to a drive shaft (10) in rotationally rigid manner, while being capable of displacement axially away from the other grindstone (20) against the force of a spring (26).
7. Mill according to Claim 6, characterized in that the upper grindstone (20) is rotationally rigidly mounted while being axially displaceable and lockable.
8. Mill according to one of Claims 1 to 6, characterized in that both grindstones (18, 20) can be driven at different peripheral speeds in a common direction of rotation.
EP82106899A 1981-08-01 1982-07-30 Household grain-mill Expired EP0071906B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT82106899T ATE22233T1 (en) 1981-08-01 1982-07-30 HOUSEHOLD GRAIN MILL.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19813130519 DE3130519A1 (en) 1981-08-01 1981-08-01 GRINDING A HOUSEHOLD CEREAL MILL
DE3130519 1981-08-01

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Publication Number Publication Date
EP0071906A2 EP0071906A2 (en) 1983-02-16
EP0071906A3 EP0071906A3 (en) 1983-10-26
EP0071906B1 true EP0071906B1 (en) 1986-09-17

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EP82106899A Expired EP0071906B1 (en) 1981-08-01 1982-07-30 Household grain-mill

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US (1) US4502643A (en)
EP (1) EP0071906B1 (en)
AT (1) ATE22233T1 (en)
DE (2) DE3130519A1 (en)

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KR101692998B1 (en) * 2015-04-06 2017-01-05 문인술 Third stage millstone which is driven by power unit
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US2119768A (en) * 1938-06-07 Grinding plate
US7630A (en) * 1850-09-10 Paint-mill
GB643249A (en) * 1900-01-01
DE368126C (en) * 1923-02-02 Rudolf Beck Millstones for horizontal and vertical mills
DE240737C (en) *
US891050A (en) * 1905-12-04 1908-06-16 John L Durham Millstone.
US1670714A (en) * 1924-01-04 1928-05-22 James A Craig Attrition grinder
US1556323A (en) * 1925-06-04 1925-10-06 Garza Pablo Gongales Mill disk
US1969899A (en) * 1933-02-15 1934-08-14 Hamilton Beach Mfg Company Coffee grinder attachment
US2478937A (en) * 1946-02-28 1949-08-16 Niethamer Julius Horizontal-disk pulverizer
DE1896841U (en) * 1963-11-15 1964-07-16 Georg Johann Schmidt MAHLSTEIN.
US3688996A (en) * 1971-01-25 1972-09-05 Johnnie Kuest Flour mill
US3761027A (en) * 1971-03-15 1973-09-25 F Mendoza Disk mill
DE2202798A1 (en) * 1972-01-21 1973-08-02 Johann Georg Dr Med Schnitzer PAIR OF GRINDSTONES FOR GRAIN MILLS
DE2444152C2 (en) * 1974-09-16 1982-10-14 Johann Georg Dr.med.dent. 7742 St Georgen Schnitzer Pair of grinding stones for a flour mill
DE2436482C3 (en) * 1974-07-29 1981-07-30 Gebr. Eizenhöfer oHG Metallwarenfabrik, 8752 Kleiostheim Motor-operated mill for household use for grinding dry, granular grist, in particular grain
DE2641395A1 (en) * 1976-04-20 1977-11-03 Toshio Yagi WASTE DISPOSAL DEVICE
US4039153A (en) * 1976-04-26 1977-08-02 Hoffman Douglas L Grinding mill
US4057194A (en) * 1976-08-23 1977-11-08 Orton Roger W Portable flour mill
DE8122817U1 (en) * 1981-08-04 1982-02-04 Burggrabe, A.-Hilmar, Dr.-Ing., 7031 Aidlingen GRINDING A HOUSEHOLD CEREAL MILL

Also Published As

Publication number Publication date
US4502643A (en) 1985-03-05
EP0071906A3 (en) 1983-10-26
DE3273354D1 (en) 1986-10-23
ATE22233T1 (en) 1986-10-15
EP0071906A2 (en) 1983-02-16
DE3130519A1 (en) 1983-02-17

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