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Publication numberUS2618307 A
Publication typeGrant
Publication dateNov 18, 1952
Filing dateOct 29, 1949
Priority dateOct 31, 1948
Publication numberUS 2618307 A, US 2618307A, US-A-2618307, US2618307 A, US2618307A
InventorsBernhard Keller
Original AssigneeBernhard Keller
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Abrasion type hulling machine
US 2618307 A
Abstract  available in
Previous page
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Claims  available in
Description  (OCR text may contain errors)


Bf/P/VHARO X62167? Patented Nov. 18, 1952 ABRASION TYPE HULLING MACHINE Bernhard Keller, Zurich, Switzerland Application October 29, 1949, Serial No. 124,349 In Switzerland October 31, 1948 3 Claims.

The present invention refers to a dehusking machine, in particular for legumes, having rotating grinding wheels arranged one above the other and, surrounding said grinding wheels, a dehusking skirt with fine slots, the column of material to be dehusked moving downwardly and the husks being exhausted through the slots provided in the dehusking skirt, the machine being characterized by having means for adjusting the speed of passage of the material to be dehusked through the machine, and means for slowingdown the rotational speed of said material.

Preferably the means for adjusting the speed of passage of the material to be dehusked can be arranged below the dehusking means and be formed of a number of circular-shaped segmental slides under the operative action of adjustment means.

By way of example an embodiment of the present invention is described hereafter and is shown in the accompanying drawing in which:

Fig. 1 is a vertical section through the dehusking machine,

Fig. 2 is a cross section taken along line 22 of Fig. 1,

Fig. 3 is a cross section taken along line 3-3 of Fig. 1.

The dehusking machine shown has a casing consisting of the bottom casing part I, the top casing part I and the feed opening 2. Running axially through the casing there is the shaft 3 mounted in the bearings 3', 3" and carrying at one end a driving gear wheel This gear wheel preferably has the shape of a bevel gear and meshes with a corresponding bevel gear I secured s to the shaft 5 driven by an electric motor 6.

I'he shaft 5 is mounted in the bearings 5, 5" in the bottom part of the casing I to the outer wall surface thereof is attached the electric motor 6. Equally spaced on the shaft 3 a number of grinding wheels 8in the example shown there are arranged 5 grinding wheelswhich are surrounded by a cylindrical dehusking skirt 9, which by way of example can be made of steel, and which is provided with spaced passageways or slots I0. The diameter of the grinding wheels 8 is chosen in relation to the inside diameter of the dehusking skirt 9 in such a manner that the husks of the material to be dehusked is ground off between the grinding wheels and the dehusking skirt 8 on rotation of said grinding wheels 8. During this operation the husks are exhausted and removed in the direction of the arrow PI through the slots ID of the dehusking skirt by means of the fan I3 mounted on the lower end of shaft 3, and the dehusked material is led to a central outlet chute I I in the direction 7 of the arrow P2.

To prevent accumulation of the material dehusked in the outlet chute II means for adjusting the speed of passage of said dehusked material are provided. According to the example of embodiment shown said means are arranged below the dehusking means 8 and consist of an obstruction formed of the slides I2 which adjustably close more or less the mouth of the outlet chute II in the casing top part I. The slides l2 take the form of circular-shaped segments and are under the operative action of the adjusting means I4. The slides I2 are adjustable independently of each other.

To counteract the detrimental efi'ect of the high circumferential speeds of the dehusking means 8 necessary for the dehusking operation at whichspeeds the grains would be carried along and flung against the dehusking skirt 9 where they would be damaged the dehusking machine is provided with means for slowing down the material to be dehusked during its treatment. Said means according to the first example of embodiment shown in Fig. 1 can consist of combshaped slowing-down elements I5 extending between the grinding wheels 8 and the dehusking skirt 9 in the vertical position and being adjustably arranged in relation to the dehusking elements. The projecting comb-teeth of the slowing-down elements engage between the grinding wheels arranged one above the other and prevent the material to be dehusked from being carried along by the rotation of said grinding wheels. Said slowing-down elements l5 are mounted for adjustment in the radial direction by means of the slots I6.

The dehusking machine described is suitable for the dehusking of legumes or vegetables of any suitable kind such as peas, beans, grain. It has the advantage that both the circumferential as well as the passing-through speeds of the material to be dehusked can be adjusted so that undesired accumulations can be prevented and a continuous operation with a simultaneous greatest possible preservation of the material dehusked is achieved.

It can thus be seen that there has been provided, in accordance with the present invention, a hulling machine, in particular for grain and like leguminous material, comprising a substantially vertical shaft, rotatable abrasive wheels spacedly arranged from each other on said shaft,

' a skirt surrounding said wheels and. provided within said channel for reducing the rotational, speed of said material caused by said abrasiye wheels, said member having portions extending within the spaces between said abrasive wheels; v and between said skirt and said abra ve wheels 7 and in radial direction from said-skirt;

What I claim and wish to secure by liett'ers Patent is: 1. A hulling machine, in particular for grain ndhke uminq s materia om r sing a. sub; stantially e ca sha t o atabl abra i w ee sp'acedlyarrang'ed from each othergo'ni, id 8 aft,

the l ection f aidha t l nisf e i en 1 e 1 ndz ne on ct w th aid bra i e whee s; m an for.1'egu1 ating. the speed of passage of said fed mater l. h. said; chann bi e ie i t meansv ompri ing, embe ex ending. opsi- 4 tudinally of the axis of said shaft and located within said channel for reducing the rotational speed of said material caused by said abrasive wheels, said member having portions extending within the spaces between said abrasive wheels and between said skirt and said abrasive wheels and in radial direction from said skirt.

2. A machine according to claim 1, wherein saidregulating means comprise a plurality of circularshaped segmental sIideseXtending at one end of said passageway, and means outside said skirt and associated with a respective slide for adjusting the same in radial direction to said shaft."

3.. A machine according to claim 1, including means for adjusting said projecting means in position 'relati-vely to the periphery of said abrasive" wheels and within the spaces between said abrasiye wheels.


eEri qEsQ rEa The follawing e rences are, of. record in the; l v s li i 9 9???- VI r I i I UNI EEERS PATES PATENTS umber Name te ie sg'z, Wall t al. Mar. 30,1375 24:2 ;153; Prinz; May 3-1, 1881 2YZ4 -,0' 02' MarLlB, 1883 3,93, 5 38 Feb. 26, 1839; 439,435 0 11;. 28, 1890'" 999; 112 35 July 25; 1911 1,017,312 6 1912

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US161367 *Feb 10, 1873Mar 30, 1875 Improvement in machines for hulling and cleaning grain
US242153 *May 3, 1880May 31, 1881P Oneprinz
US274002 *Jul 20, 1883Mar 13, 1883 Decorticating-machine for grain
US398538 *Feb 26, 1889 Grain-scourer
US439485 *Oct 28, 1890 dieseldorff
US999118 *Feb 23, 1910Jul 25, 1911Frederic M LyonFeed-regulator.
US1017326 *May 1, 1911Feb 13, 1912Charles SchachtGrain hulling and scouring machine.
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3885464 *Mar 15, 1973May 27, 1975Ceballos Aguilera GuillermoPolishers for cereals
US3960068 *Jan 29, 1975Jun 1, 1976Felipe SaleteMachine for whitening, polishing or pearling grains and cereals and more particularly rice
US5036757 *Jul 18, 1988Aug 6, 1991Buehler AgApparatus for shelling and de-germinating corn
US5076156 *Sep 26, 1990Dec 31, 1991Kubota CorporationGrain cleaning machine
US5413034 *Jun 10, 1994May 9, 1995Satake CorporationResistance member adjusting mechanism of abrasive type grain milling machine
US5419252 *Aug 23, 1994May 30, 1995Satake CorporationVertical milling machine
US20140103153 *Oct 15, 2013Apr 17, 2014Scott Charles BelowGrain Mill
U.S. Classification99/606, 99/618
International ClassificationB02B3/00, B02B3/02
Cooperative ClassificationB02B3/02
European ClassificationB02B3/02