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Патент USA US2406013

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>ug. 20, 19-46°
_ ‘
Filed Sept. 25, 1943
no! P/Ms?? FE W.
Patented Aug. 20, 1946
Dolphis G. Grew, Sagin'aW,1Mi'ch..
Application September 25, 1943', 'S:erial'No..50?",736
3 Claims.
(Cl. 551-107‘)?
p This invention relates to apparatus for topping
ori‘removing leaves ‘andstems from’ sugar beets
or’other vegetables or‘ roots before being lifted;
also for destroying weeds that sprout between
thejrows early in the growing season.
My‘ invention provides an effective, inexpensive
double purpose device, for both weeding and
screws as abutment structures’applied to a lami
nated disk;
Fig. 4 is a diagrammatic plan view of a tractor
with a topper of my invention mounted thereon;
Figs. 5 to 8', ‘inclusive, are diagrammatic side
views‘ “of the rotor disk, showing the positions it
occupies‘ when engaging and passingrover beets
that project different heights above the ground
‘A result attained by its use as a beet topper
in the same row;
Fig. 91s a fragmentary diagrammatic face View,
is: removal of leaves. stems; and the low-grade 10
showing two disks- in‘ overlapping arrangement
portion of the beet caps without wasting com"
suitable for destroying weeds, and'at the same
me'rcially good root ‘substance.
time cultivating the surface of the ground;
H Another desired result is to disintegrate the
Fig. 1o'is a diagrammatic fragmentary edge
leaves, ‘the stems, and the worthless portions of
the best caps, dispersing the fragments over the 15 View of a rotor showing its bottom periphery ar
ground between the rows, as‘ a mulch‘ or fertilizer.
v Anotherobj ect is to provide such an implement
rangedtomake a'vtr‘ough-like path in the ground
while advancing in the manner indicated in Fig.
l; and‘
with flexible characteristics that render it capa
Fig. 11 is a similar fragmentary view, showing
ble of adapting itself to top‘ all beets of "a row
substantially alike, even though some may pro 20 how a greater ?exing action» isvv caused when en
countering and’. passing over a stone in the
ject high above the ground; while others‘ in the
same row are below the surface“.
A further object is to provide a self-clearing
topping element‘ constructed so that it shall keep
irig ed‘gewise' along the ‘ground.v
.6: between: transmission 3; and power source 4 is
The foregoing viewsilllustrate the structure and
novel mode of operation of my improved‘ rotor
it'sel'f' free from accumulations of leaf and root 25 when used fortopping sugar beets under various
conditions; and‘ also‘v for destroying weeds.
‘material and dirt. It, is‘ adapted to be mounted
The beet. topping? element consists primarily of
on‘a conventional tractor as auxiliary equipment,
a-disk-li'ke rotor‘ I mounted on a suitable spindle
and ‘can be easily attached or. removed. It is not
2',’ the- other end of‘ which is operatively connect
likely to break or become dulled by contact with
stones, as do cutting disks and knives when ?xed 30 ed, Fig. 4,. by a. transmission 7,3: to .a. power source
4' on atractorlorg other vehicle 5. The connection
‘diagonally across‘ the‘ row so as to out byadvanc
pivotal-so. disk I can rise or, lower relatively to
Any additional‘ object of my invention, besides
the tractor 5‘ as it moves along'therow of beets,
t'oppi'ng, is to kill weeds in the early stage of
‘sprouting, scattering the disintegrated material 35 following~ thepontour of the v ground.
_ The advancing face of the. rotor, Fig. 1, is
over the ground‘ as above described, and also pul
equipped vwith ‘ forwardly proj ecting short teeth ‘or
veri'zing a portion of the surface soil.
Preferably the projections or strikers
The results and objects‘ above mentioned ‘and
‘La-re arrangedadjacent the rim portion of the
certain others set forth in the speci?cation are
attained by a combination of devices and the 40 disk. 6 They maybe in one or more circularrows,
equivalents‘ thereof. described and‘ claimed here
v{is-indicated imli-Tigs. 1;,_ 2,, 3, and may be, spaced
in as typical‘ embodiments . of my‘ invention.
. Referring to the accompanying drawing which
illustrates a' preferred embodiment of‘ my claimed
from each other symmetrical-1y or otherwise.
Their function is_to disintegrate the leaves and
stems, together with only that portion of the
45 substance ofieachbeet cap which is intended to
berenioved, ‘as will now be described.
vFig. 1 is a perspective view of the rotor with
disintegrating abutments or strikers thereon and
a shoe for supporting the rotor at working height
In use, rotor] is _ supported by shoes ti or
equivalent devices that travelupon the surface
of the ground; asvv is indicated in Fig. 10, their
Fig--2 is an enlarged fragmentary section, taken 50 purpose being to keep the peripheral bottom edge
portion 9' of the disk I' from cutting too deeply
approximately on the radial line 2-2 of Fig. 1,
during its advancing movement;
showing, as a modi?cation of my invention, a
intothe ground.
Shoes 8' and disk ll travelv steadilyv along the
row of beets as a unit, being undisturbed by
integral with the disk;
Fig. 3 is a view similar to Fig. 2, showing 55 swaying‘ and upeand-down movements of the
double ‘row of disintegrating abutment's', made
vehicle 9, due to pivotal connection 6. The rotor
cut heights with earlier mechanically adjustable
is adapted to travel in the direction of its own
axis, Figs. 1 and 4, being propelled by the ve
cutters is avoided.
The beet caps are prevented from being out
hicle 5 and rotated by power means 4 on the
too deeply. Since the elements ‘I project only a
Cl short distance in front of the face of disk I they
Flexibility is a characteristic feature of the
can remove the beet cap material to only a cer
disk I. It should be readily pliant and supple or
somewhat ?oppy but need not necessarily be
tain depth while rotating at a given speed.
Disk face I acts as a gauge or guard plate that
prevents cutting too deeply into' thebeet sub
Preferably, the ability of the disk I to ?ex is 10 stance, so, at a‘ given disk- speed, regardless of
springy, elastic, or resilient.
made greater near the periphery than near the
axis of rotation.
the height of the beet above the ground, there is
no danger of cutting off more of the cap than
A satisfactory disk structure may comprise
- that portion intended to be destroyed.
several plies of canvas and rubber, or plas
When the rotor is driven at a good working rim
tic or like material, built up as indicated in Fig. 3. 15 speed, say, three to four thousand feet per min
I have found in practice that for the purpose
ute, the strikers, ‘I, have ample velocity and pen
of topping sugar beets the disk may be, say, 20
etrating force to destroy, disintegrate, and dis
inches in diameter, with teeth or strikers‘! that‘
perse beet stems, leaves and cap material while
project about one-fourth inch to one inch from
the machine 5 moves forward at a convenient
the advancing face, depending somewhat upon
the amount of cap to be removed. The strikers
‘I may be formed in ‘One piece with the disk body
I, as shown in Fig. 2,.or they may be in the form
of inserted screws or the like, as in Fig. 3. They
20 rate, but the central area of the disk, being
smooth, that is, having no strikers, does 'no ‘dis
integrating, but presses down the leaves prepar
When rotating at appropriate’ speed the ?exi
atory to the tearing action of the strikers, ‘I.
To sum up, my improved topping device uti
lizes the centrifugal force produced by rotation
of the ?exible disk to normally constrain the disk
to a plane of rotation perpendicular to its axis.
The inner portion of the revolving disk surface,
ble disk I tends to hold to its normal working po
sition in a plane perpendicular to its axis.
However, if the lower part of the disk rim en
. in the vicinity of numeral I, ?rst comes into con
30 tact with the beet leaves and stems, bending
them over as the disk moves forward, as shown in
are arranged in preferably one or two substan
tially circular rows adjacent the rim portion only
of the disk I.
Figs. 5, 6, 7, 8. The foliage thus bent is in posi
counters an obstruction, such as a bunch of beets, '
stems, and leaves, while advancing along the row
tion to be shredded by the rapidly whirling pro
of beets, then the lower rim portion 9 and also,
jecting prongs or strikers ‘I while the rim por
if the obstruction is a highqone, the portions’ 35 tion 9 of the disk wipes and whirls over the beet
nearer the, center of the disk in the vicinity of
During such shredding operation centrifugal
numeral I will bend backward pliantly, and wipe
force keeps the swiftly rotating strikers ‘I yield
over the obstruction.
ingly pressed downwardly toward the beet cap
But as soon as the rotating disk passes the ~
obstruction and the lower rim portion again is 40 so particles of leaves, stems, and tops sheared off
free the normal plane of rotation is assumed au
by the strikers are thrown clear of the row of
tomatically, due to centrifugal action. 7
If the obstruction encountered is a beet cap
and foliage, as illustrated in Figs. 5 to 8, the low
er rim portion of the yielding disk goes over the
beet cap with a ?ap-like Wiping action and swift
lateral movement due to the rotation of the disk,
The extent to which it is ?exed by the beet de
pends upon the height of the beet cap from the
For the purpose of destroying weeds between
rows of beets during the early part of the grow
ing season a single disk may be used as in Fig. 1,
or two or more disks, I, I, may be situated in over
lapping arrangement as shown in Fig. 9, being
moved forward together and rotated simulta
ground. A high projecting beet, Fig. 8, will be 50 The lower rim 9 of disk I projects into the
ground, say, from one-half tov one inch, Fig. 10,
engaged by the smooth face portion of the disk
nearer the center of rotation and will be ?exed
there considerably, as shown, near numeral I,
and so will press and wipe the stems and leaves
down ?atwise before they are overriden by the
strikers ‘I while a beet cap close to the surface,
Fig. 5, will cause only a small degree of ?exing
and the projections ‘I act to clear away loose sur
face dirt, pebbles, etc. and to destroy the foliage
and roots of the weeds. If a stone is encountered,
as shown in Fig. 11, the disk I will ?ex backwardly
and wipe over the surface of, the stone, then re‘,
sume its planar position to continue weed de
struction, as indicated.
at I andgreater ?exing, accompanied by disinte
From the foregoing it will be seen that the ro
grating at 9. The ?exible character of the disk
tor with strikers ‘I disintegrates weeds and scat
makes the rotor I self-adapting, that is to say it 60 ters the pieces laterally away from the path of ad
can top all beets in a row even if they are of vari
ous heights, as will now be explained, reference
being had to Figs. 5 to 8, inclusive.
The rotor passes with equal facility over beet
caps that project only slightly above the ground,
and those caps that project higher.
7 The strikers ‘I operate on all beets alike, after
they have been ?attened down by the smooth
central portion of the disk, with a tearing and
rapsing movement that is far superior in prac
tice to the cutting and slicing‘ actions hereto
fore generally employed to top beets mechani
cally. . Thus, loss of goodmaterial due to waste- - -
fully and inaccurately knifing beet caps at differ
vance of the rotor; also, a small amount of the
surface dirt will be thrown to one side, as' indi
cated in Fig. 9.
Y‘ .
The rotor I is self-clearing, that is, it keeps
itself free from mud, dirt or'other accumulations
that otherwise might clog it. Its self-clearing
feature is apparent from inspection of‘Fig’. 1,
where it will be seen thatthe short projections
‘I on the flat face of the disk offer but little op
portunity for accumulating dirt. The ?exibility
of the disk with its rim'yielding back and forth,
when running at working speed, tends to dislodge
any dirt accumulation, andthe force produced
by the rapid rotation of the disk throws it free
pass with wiping and rotary action over and in
contact with the foliage and caps of successive
so that no matter how sticky or adhesive the soil
may be the rotor can not ?ll up, but instead the
members 1 are always clear and capable of exert
beets in said row; striker elements disposed on
the work-engaging face of such outer rim por
ing their maximum disintegrating effect when
ever a beet or a weed is encountered.
tion only, projecting forwardly therefrom in cir
of disk I.
its axis extending substantially in the direction
cularly spaced relation; and depth-limiting de
In the operation of topping no vertical ad
vices supporting said rotor in predetermined rela
justment of the rotor I or spindle 2 is necessary
tion to the ground surface.
in order to top uniformly a row of short and
2. In a device for topping beets and the like,
tall beets; because the rotor l ?exes to suit all
ordinary conditions of use, without any vertical 10 a vehicle transportable along a row of beets, a
?exible disk-shaped rotor mounted thereon with
adjustment of the shoe 8 relatively to the aXis
of travel of the vehicle and pivotally connected
- Having thus described my invention, what I
thereto; power means for revolving the rotor;
claim and desire to secure by Letters Patent is:
1. In a device for topping beets and the like, 15 striker members arranged on the work-engaging
face of the rotor adjacent the‘ outer rim portion
only thereof; said strikers being situated in pe
ripherally spaced relation to each other and
a vehicle transportable along a row of beets, ‘a '
rotor comprising a flexible disk, a spindle for said
disk having pivota1 connection to the vehicle and
extending substantially in the line of travel of
projecting beyond said work-engaging face.
3. A rotor for beet toppers, weeders and the
like comprising a ?exible pliant disk rotatable
in its own plane at speed appropriate to normally
maintain the rim portion of the disk in a, plane
maintain by centrifugal action the rim portion
perpendicular to its axis of rotation; a portion
of the disk in a plane perpendicular to its axis
of the work-engaging face of said disk adjacent
the center of rotation presenting an unobstructed 25 of rotation; and strikers projecting outwardly
from the work-engaging face of the disk near its
surface adapted to contact and bend down the
the vehicle, power means on said vehicle for ro
tating the disk at speed appropriate to normally
stem and leaf portions of the beets in said row;
the outer rim portion of said disk being adapted
to flex rearwardly from said normal plane and to
periphery only, said strikers being spaced apart
in circular arrangement.
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