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Iowa State University Patents

Iowa State University Research Foundation, Inc.

12-24-1974

Shelling mechanism

Wesley F. Buchele

Iowa State University

Ali R. Mahmoud

University of Khartoum

Follow this and additional works at:

http://lib.dr.iastate.edu/patents

Part of the

Bioresource and Agricultural Engineering Commons

This Article is brought to you for free and open access by the Iowa State University Research Foundation, Inc. at Iowa State University Digital Repository. It has been accepted for inclusion in Iowa State University Patents by an authorized administrator of Iowa State University Digital Repository. For more information, please contactdigirep@iastate.edu.

Recommended Citation

Buchele, Wesley F. and Mahmoud, Ali R., "Shelling mechanism" (1974).Iowa State University Patents. 10.

(2)

Shelling mechanism

Abstract

A corn shelling mechanism comprising an elongated concave means having one end thereof positioned below

a rotatable cylinder. A continuous belt sheller is positioned above the concave in a spaced relationship with

respect thereto. The corn ears are fed to the rotating cylinder by a feeder housing means with the ear receiving

one or more impacts by the rasp bar of the cylinder before it travels out of range of the cylinder. The partially

shelled ear passes between the belt sheller and the concave with the belt sheller urging the ears into

engagement with the concave to complete the shelling operation.

Disciplines

Bioresource and Agricultural Engineering

(3)

United States Patent

[191

Buchele et al.

[54] SHELLING MECHANISM

[75] Inventors: Wesley F. Buchele, Ames, Ohio; Ali R. Mahmoud, Khartoum North, Sudan

[73] Assignee: . Iowa State University Research Foundation, Inc., Ames, Iowa

[22] Filed: July 26, 1973

[21] Appl. No.: 382,668

[52] U.S. Ci. ... 130/6, 130/21 [51] Int. Cl. ... AOlf 11/06

[58] Field of Search ... 130/6, 21 [56] References Cited

199,496 361,644 3,448,566

UNITED STATES PATENTS

1/1878 4/1887 6/1969

Blair ... 130/6 Pitts et al. ... 130/6 Vander Le1y ... 130/21

[ 11]

3,856,022

[45]

Dec. 24, 1974

3,662,762 5/1972 Brass ... 130/6

Primary Examiner-Antonio F. Guida

Attorney, Agent, or Firm-Zarley, McKee, Thomte &

Voorhees

[57] ABSTRACT

A corn shelling mechanism comprising an elongated concave means having one end thereof positioned below a rotatable cylinder. A continuous belt sheller is positioned above the concave in a spaced relationship with respect thereto. The corn ears are fed to the ro-tating cylinder by a feeder housing means with the ear receiving one or more impacts by the rasp bar of the cylinder before it travels out of range of the cylinder. The partially shelled ear passes between the belt sheller and the concave with the belt sheller urging the ears into engagement with the concave to complete the shelling operation.

6 Claims, 2 Drawing Figures

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PATENTED

DEC2 41974

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3,856,022

1

SHELLING MECHANISM

BACKGROUND OF THE INVENTION

This invention relates to a shelling mechanism and more particularly to a corn shelling mechanism. Re-search indicates that there is an increase in kernel dam-age. to corn proportional to the distance the kernels have traveled down the shelling crescent of a cylinder concave shelling mechanism. High speed photography has shown that shelling becomes very easy once the first few kernels have been detached from the ear by impact. The high impact forces applied to the ear by the conventional cylinder concave shelling mechanism results in extensive kernel damage.

Therefore, it is a principal object of the invention to provide an improved corn shelling mechanism.

A further object of the invention is to provide a corn shelling mechanism wherein kernel damage is reduced.

A further object of the invention is to provide a corn shelling mechanism wherein a high speed cylinder initi-ates the shelling operation and a belt sheller mecha-nism completes the shelling operation.

A further object of the invention is to provide a corn shelling mechanism which quickly and efficiently shells the ear with low kernel damage.

A further object of the invention is to provide a com shelling mechanism which is economical of manufac-ture, durable to use and low in energy consumption.

These and other objects will be apparent to those skilled in the art.

2

of rollers 38 and 40 rotatably mounted at the upper and lower ends thereof respectively. A continuous belt 42 extends around the rollers 38 and 40 and passes be-neath a belt tightener mechanism 43. A plurality of

5 supporting rollers 44 are provided as seen in FIG. 1 to prevent the lower portion of the belt from being de-flected upwardly. The shaft 46 is operatively connected to a source of rotational power to operate the belt sheller mechanism.

I 0 The normal method of operation is as follows: The ears 14 are fed to the rotating cylinder 16 by the feeder housing 12 in conventional fashion. The ear receives one or more impacts by the rasp bar of the cylinder be-fore it travels out of range of the cylinder. The rasp bar

l5 should partially shell several rows of kernels at this lo-cation. The ear, while rolling down the concave 20, comes under the influence of the belt sheller mecha-nism 34. As seen in the drawings, the concave 20 is po-20 sitioned below the belt 42 and is made up of grated sec-tions 22 so that the grain, once the belt begins the shell-ing process, drops through the concave as it is rolled down the concave by the belt sheller and separated from the ear. As seen in FIG. 2, the space between the 25 belt 42 and the upper surface of the concave 20

be-comes progressively smaller. The belt 42 urges the ear (often rolling it) into engagement with the upper sur-face of the concave to complete the shelling of the ear. Little or no damage is caused by the belt to the shelled

30 corn. The cylinder 16 provides high impact forces to

initiate shelling and the belt provides low impact shell-ing to complete the shellshell-ing of the partially shelled ear.

DESCRIPTION OF THE DRAWINGS The cylinder and belt shelling mechanism combines the

This invention consists in the construction, arrange- desired impact forces to start shelling and low impact ments and combination of the various parts of the de- 35 force to complete the shelling with low damage shelling vice, whereby the objects contemplated are attained as occuring. Inasmuch as the belt sheller is shelling par-hereinafter more fully set forth, specifically pointed out tially shelled ears, the life of the belt should be substan-in the claims, and illustrated substan-in the accompanysubstan-ing tially gr~ater than the regular .belt shellers. .

drawings, in which: ~hus It can be seen ~hat a umq~e corn sh~lhng

~ech-FIG. 1 is a top view of the shelling mechanism with 40 amsm has been provided ~herem a rotatmg cyl.mder portions thereof cutaway; and and a belt sh.eller mec?amsm cooperate to efficie?tly FIG. 2 is a sectional view taken on Jines 2-2 of FIG. shell corn With very httle kernel damage occurnng.

1 Therefore, the invention accomplishes at least all of its

• stated objectives.

BRIEF DESCRIPTION OF THE PREFERRED 45 We claim:

EMBODIMENT 1. A com shelling mechanism comprising,

The corn shelling mechanism of this invention is re- an elongated concave means having first and second ferred to generally by the reference numeral 10. The ends,

numeral 12 refers to a conventional feeder housing ap- a powe·red rotatable cylinder means positioned above paratus adapted to deliver the ears 14 to a rotatable 50 said concave means adjacent said first end for par-cylinder 16 having a plurality of spaced apart rasp bars tially shelling the ears passing therebetween,

18 provided thereon. means for conveying the ears to said cylinder means,

The numeral 20 refers to a substantially straight con-cave having a plurality of shelling grate sections 22

pro-55

vided thereon. If desired the concave 20 may be curved at a point near its upper end to increase the angle of contact between the ear and cylinder 16. The upper end of the concave 20 is mounted to the combine hous-ing 24 by a sprhous-ing means 26 as seen in FIG. 2. The nu- 60 meral28 refers to a roller and retainer mechanism pro-vided at the upper end of the concave 20. The numerals

a powered belt sheller positioned above said concave means in a spaced relationship with respect thereto, said belt sheller extending from said cylin-der means towards said second end, said belt sheller urging the partially shelled ears to engage-ment with said concave means to complete the shelling operation, said concave means being straight and continuous beneath said cylinder means and said belt sheller.

30 and 32 refer to lateral compression springs and lon-gitudinal compression springs respectively which mount the lower end of the concave as seen in FIG. l.

2. The com shelling mechanism of claim 1 wherein

65 sai~ concave means is laterally and longitudinally

sprmg mounted.

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3,856,022

3

the partially shelled ears into engagement with said concave means.

4. The com shelling mechanism of claim 1 wherein said belt sheller comprises means for yieldably rolling partially shelled ears into engagement with said con-cave means.

5. The com shelling mechanism of claim 1 wherein said belt sheller has upper and lower ends, the distance

4

between said belt sheller and said concave means pro-gressively decreasing from the upper end of said belt sheller to the lower end of said belt sheller.

6. The com shelling mechanism of claim 1 wherein

5

said concave means comprises a plurality of shelling grates.

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References

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