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Патент USA US2407173

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Sept. 3, 1946.
Original Filed ‘June 28, 1945 H ’
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2 Sheets-‘Sheet 1
Sep‘t. 3,1946.»
Original- Filed Jul-19 28, 1943
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2 Sheets-Sheet 2
Patented Sept. 3, ‘1946
James Morkoskl, Canton, 11L, assignor to Inter:
national Harvester Company, a corporation of‘
New Jersey
Original application June 28, ‘1943,’ .Serial ‘N70. M
492,476. Divided‘ and this application Novemher-129, 1944, Serial No. 565,623
4 Claims.
This invention relates to agricultural imple
ments, and more particularly to implements of
the trailing type adapted for attachment to a
(Cl. 97-47) '
Figure 3 is a detail in sideelevation of a part
of the hitch structure.
Referring to the drawings, the two-way plow
shown in the drawings includes a pair of plow
units l0 and H, each comprising a, longitudi
More speci?cally the invention is concerned with
nally extending beam |2 having mounted upon
a hitch structure forrplows and the like.
the rear end thereof a plow bottom l3. Beams
The present invention will be described as ap
|2 are mounted for rocking movement upon the
pliedto a trail-behind two-way plow. However,
transverse portion I4 of a crank axle having
it should be understood that with slight modi
?cations the invention may be adapted for use 10 rearwardly extending arms I5 supporting ground
wheels l6. Each wheel has associated therewith
with other implements. The invention is par
a power lift mechanism I’! by means of which
ticularly applicable to plows such as that shown
power from the ground wheel is utilized to raise
and described in pending United States appii~
and lower each plow beam l2 independently.
cation of John R. Orelind and James Morkoski,
Generally parallel to each beam and extend
Serial No. 492,476, ?led June 28, 1943, of which 15
ing longitudinally thereof for a considerable dis
this application is a division. In a plow of this
tance is a bracket l8 having an inwardly bent
type, the beams are generally supported between
end I!) attached to the outer face of the beam.
front and rear ends‘ thereof by laterally spaced
The forward end of the bracket I8 is made fast
wheels, and the plow is pivotally connected to a
to the beam by a U-shaped member 29 affixed
relatively long 'hitch frame which, in turn, is
to the bracket and the beam. The free forward
pivotally connected to the tractor by which the
‘ends of, beam I2 andvbracket I8 are connected
implement is drawn.
by a bolt 2| having nuts 22 upon the outer ends
In a plow of‘ the type described, the line of
thereof, Depending from bolt 2| and pivotally
draft is a theoretical straight line extending from
mounted thereupon is a member 23 comprising
the center of gravity of the working plow bot
a sleeve portion 24 and a bracing arm 25 provided
tom to‘ the point 'of attachment of the imple
with bosses 26 and 21 having openings for the
ment to the tractor. Since the point of attach
reception of ‘bolt 2|, and abutting beam l2 and
ment of the hitch frame to the implement must
bracket l8, respectively, to prevent lateral move
be slightly above this point in order to prevent
ment of member 23. Sleeve 24 receives for slid
the collection of trash near the ground, the rear
ing movement therein a shaft '28,. which may be
of the plow has a tendency to rise out of the
telescoped with respect to the sleeve to vary the
ground and the implement to. pivot forwardly.
effective length of member 23, and may be held
An object of the present invention is to pro
in a number of adjusted positions by a set screw
vide means incorporated in the hitch and plow
structure for overcoming the tendency of the
Members 23 have independent forward and
implement to pivot forwardly.
rearward pivotal movement to permit the work
Another object is to provide means which not
ing plow bottom to assume its proper plowing
only inhibit the forward pivoting of the plow
position with respect to the rear wheels of the
and the consequent tendency of the working tools
or plow bottoms to rise out of the ground, but 4-0 tractor, depending upon the direction of travel
of the plow across the ?eld, and are actuated by
which resiliently hold the plow bottom or bot
a mechanism which, along with the details of
toms to their work during operation, and also
construction of the plow units, forms no part
prevent forward tilting of the implement when
of the present invention. For operational and
backing up, particularly in transport position.
45 constructional details of the plow reference may
These and other objects will become clear from
be had to pending United States application Se
the following detailed description when read in
rial No. 492,476, referred to hereinabove.
conjunction with the accompanying drawings,
The lower end of each shaft 28 is flattened
and apertured to receive a pin 3|], upon which is
Figure 1 is a view in side elevation of a two
mounted for vertical pivotal movement the bifur
way plow embodying the principles of the pres
> calted rear end of a hitch member 3 I, forming one
arm of a hitch frame generally indicated at 32.
ent invention, attached to a tractor, and show
Hitch members 3| converge forwardly and are
ing the left-hand plow bottom in raised position;
provided at their forward ends with bent por
Figure 2 is a plan view of the plow shown in
tractor or other vehicle to be drawn therebehind.
Figure 1; and
55 tions 33 and 34, overlapping and having regis
tering openings to receive for sliding movement a
rearwardly extending rod 35, surrounded by a
spring 36. The forward end of spring 36 abuts
Having described the invention, it should be
understood that modi?cations may be made there
in without departing from the spirit thereof or
the scope of the appended claims.
against a clevis 31 and the rear end against nuts
38 by which the tension upon the spring may be
varied. The forwardly projecting end of rod :35
is af?xed to the closed end of a clevis 39 provided
What is claimed is:
- 1. In an agricultural implement adapted for
with a pin 40 for attachment to the draw-bar M
of a tractor having rear wheels 42. Spring 36
imparts ?exibility to the hitch connection of the ‘
implement to the tractor.
means and said member for rocking movement
scribed has a tendency to pivot forwardly about its
connection to the transverse portion I4 of the
crank axle. . To overcome this tendency, mecha
ber 46, adjustable in length, and comprising a
sleeve 41 attached to the clevis 31 on the for
implement, a member pivoted on the implement
for longitudinal rocking movement, means ad
justable in length rigidly connecting said hitch
As pointed out before, a plow of the type de
nism has been provided including a hitch mem
attachment to a tractor, in combination, support
ing wheels on the implement, hitch means on the
therewith, and means biasing said member to
forward rocking movement.
2. In an agricultural implement adapted for
attachment to a tractor, in combination, support
ing wheels on the implement, hitch means on
the implement, a member pivoted on the imple
ment for longitudinal rocking movement, means
pivoted on a pin 49 in one arm 50 of a bell-crank 20
connecting said hitch means and said member for
5|, (see Figures 1 and 3). The bell-crank is piv
movement therewith, means biasing said
oted upon a pin 52 mounted in a bracket 53
member to forward rocking movement, and stop
aiiixed to the transverse portion I4 of the crank
means limiting forward rocking movement of said
axle between the plow units Ill and I I. Hitch
member 46 is made rigid by set-screws 54. The
3. In an agricultural implement adapted for
other arm 55 of the bell-crank is provided with
attachment to a tractor, in combination, support
forwardly bent lugs adapted to receive a pin 56
ing wheels on the implement, hitch means on the
for pivotally mounting the threaded end of an eye
implement, a bell crank pivoted on the implement
bolt 51. Eye bolt 5'! extends rearwardly and is
for longitudinal rocking movement and having an
connected to a cross-piece 58 extending later
upwardly extending arm and a downwardly ex
ally and having openings in each end for the 30 tending arm, a member adjustable in length con
attachment thereto of springs 59, the other ends
necting said hitch means and the upper arm of
of which are attached to lugs 60 secured to the
said crank for rocking movement therewith, and
sides of beams I2. It will be noted that clock
resilient means connecting the lower arm of said
wise movement of the bell-crank 5I is limited by .35 crank and said implement arranged to urge said
ward end of the hitch frame 32, and a shaft 48
the projecting ends of pin 53, which abut against
the forward edge of bracket 53. By loosening set
screws 54, the effective length of hitch member 46
may be varied. When the implement is in the
member forwardly.
4. In an agricultural implement adapted for
attachment to a tractor, in combination, support
ing wheels on the implement, hitch means on
plowing position shown in Figures 1 and 2,- and 40 the
implement, a bell crank pivoted on the im
plement for longitudinally rocking movement
forward draft is exerted thereupon, hitch mem
ber 46, through bell-crank 5I and springs 59, ex
erts a yielding downward pressure against the
rear end of the implement to hold it in the ground.
When the plow elements are lifted to raised posi
tion for transport, the effective length of member
46 may be shortened to prevent the rear end of
the implement from dropping downwardly. When
it is desired to back up the plow in transport po
sition, hitch member 46 functions to prevent for
ward tilting of the implement.
and having an upwardly extending arm and a
downwardly extending arm, a member adjust
able in length connecting said hitch means and
the upper arm of said crank for rocking move
ment therewith, resilient means connecting the
lower arm of said crank and said implement ar
ranged to urge said member forwardly, and stop
means arranged to engage said lower arm to limit
forward movement of said member.
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