US 2618307 A
Description (OCR text may contain errors)
NOV. 18, 1952 KELLER ABRASION TYPE HULLING MACHINE Filed Oct. 29, 1949 IN VEN TOR.
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