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Патент USA US2412672

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DeC- 17.,v 1946-
Filed Sept; 2, 1944
. \\\/6’
cs. 17, 1946
Evan A. Calhoun, Jesup, Iowa
Application September 2, 1944, Serial No.‘ 552,399
5 Claims.
(Cl. EMF-33.44)
This invention relates to farm equipment and
the like and has particular relation to improve
ments in hitches suitable for connecting drawn
hitch shown in Figure l. Dotted lines indicate
the extended position of the drawbar, and
Figure 3 is a a fragmentary view in side ele
implements to tractors and the like.
vation‘ ‘of a drawbar locking means constructed
In connecting tractors to farm implements by 5 according to one embodiment of my invention.
Referring to the drawing, and more particu
the usual hitches known to the art, it is extreme
ly di?icult to stop the tractor at just exactly the
larly to Figure 1 thereof, I have illustrated at
right point to permit the tongue of the implement
Figure 1 how a tractor 6 carrying a yoke-like
or like member to be exactly positioned so that
member l‘ and crossbar 8 may be secured to a
when the tongue is raised to alignment with the 10 piece of drawn equipment such as a plow or the
drawbar of the tractor it also will be in align
like by use of slidable member drawbar hitch
ment with reference to the pin or other coupling
as illustrated in Figure 2 when hitching to the
used in connecting the tractor drawbar with the
tongue of an implement which is indicated at 9
in Figure 1.
tongue of the draw implement. It is usually nec
essary for the operator to move the tractor sev 15
In the present embodiment of my invention, a
eral times before alignment can be secured and
any inequality or mal-positioning of the tractor
‘ hitch constructed according to a preferred em
bodiment of the invention includes a slidable
member or drawbar Ill slidable in rectangular
strap supports or boxes H and II I. The boxes
Usually two men are necessary.
20 H and III are secured as by welding or the like
to a strap [2 which constitutes the primary mem
Another di?‘iculty encountered in these trac
berof the hitch. A third bar member l3 extends
tors is that the tractor may become mired down
in straight parallel relation to the bar l2 and is
or stuck in soft soil so that when the drawn
welded or otherwise secured in place in the
implement is attached it is impossible to move
25 strap III at one end of the bar. The free pro
the tractor.
jecting companion ends of the bars 12 and I3
It is among the objects of my invention to over
constitute a clevis-like member at l2! and HI
come. the dii?culties above enumerated and to
adapted to form a connection with the cross bar
provide means whereby it is only necessary, in
of ‘the tractor 8. The bars l2 and [3 are sepa
coupling a tractor to an implement, to back the
tractor up to its approximate position, secure a 30 rated so that they may be engaged over the
cross member 22 of the yoke 1. The box mem
slidable drawbar to the implement and then back
ber III is provided with a ?oating pin l6 slid
the tractor up until an automatic connection is
able in a collar I‘! so that when the hole I8 in
the slidable bar It] comes into alignment with the
Another important object of my invention is to
provide a new and improved hitch which will 35 pin IE and the hole IS in the bar 12 the pin it
and implement requires considerable tugging and
working before the pin can be dropped into place.
compensate for any mal-positioning of the trac
tor and implement and which is self engaging.
Other and further features and objects of the
invention will be more apparent to those skilled
in the art upon a consideration of the accom
panying drawing and following speci?cations,
will be forced downwardly by the combined action
of gravity and the spring 20 so that the bar It
will be rigidly engaged with the bar I2.
In use, the bar It is extended and the tractor
40 ‘>6 backed up to the plow or other drawn equip
ment until the operator sitting on the driver’s
seat of the tractor thinks that the extended end
WheI'Bin'iS disclosed a single exemplary embodi
of the slidable member I!) is substantially in line,
ment of the invention, with the understanding,
with the hole 2| approximately in alignment with
however, that such changes may be made therein 45 the hole in the end of the tongue 9 of the plow
as fall within the scope of the appended claims,
or the like. It is obvious that it would be prac
without departing from the spirit of the inven
tically impossible for the operator, particularly
from his seat on the tractor, to exactly position
In said drawing:
the drawbar of the tractor over the tongue of
Figure 1 is a partial view in perspective illus 50 the drawn implement so that the drawn coupling
trating a portion of the rear of the tractor, and
24 would allow bolt l5 to drop into place. After
a hitch constructed according to the embodiment
the connection between the end of the extended
of my invention, and the tongue of an imple
bar If) and the tongue 9 is effected as by means
ment to be towed.
of the bolts IS, the operator returns to his seat on
Figure 2 is a View in side elevation of the 55 the tractor, and backs the tractor up until the
pin i6 drops into engagement with the opening
iii in drawbar Ill. The coupling of the tractor
and drawn equipment is then completed and the
operator can drive off towing the drawn equip
An important advantage of the slidable draw
bar just described is that if the tractor gets stuck
the operator may uncouple the tongue 9 by re
moving bolt l5 and move the tractor forward
ing below the lower strap member, a forward
supporting bracket carried by the lower strap
member forward of said rear bracket, a slidable
draft-transmitting member carried by said brack
ets, a stop on the forward end of said slidable
member engageable with the forward bracket for
de?ning a rear position of said slidable member,
and a lock carried by the rear bracket and en
gageable in an aperture in said slidable member
to smooth out a path or level off a portion of 10 for de?ning a forward position of said slidable
the ground. He can then extend the sliding
3. A hitch device as defined in claim 2, further
bar l0, couple it to the tongue 9 and draw the
characterized by strap members being pivoted to
equipment out without the necessity of dropping
said transverse draft member and said strap mem
the tractor back in the hole it had previously
and said slidable member swingable together
vabout said pivot axis.
Although I have described a speci?c embodi
4. An extension hitch comprising a primary
ment of my invention, it is apparent that modi
drawbar, a pair of brackets carried by said pri
?cations thereof may be made by those skilled in
mary drawbar, in longitudinally spaced relation, a
the art. Such modi?cations may be made with
out departing from the spirit and scope of my 20 slidable drawbar carried by said brackets, means
forming a stop on said slidable drawbar for lim
invention as set forth in the appended claims.
the rearward movement of said slidable
I claim as my invention:
drawbar, there being an aperture in the latter
1. A hitch device for tractors and the like
spaced closer to said- stop means than the dis
having a drawbar support, comprising a pair of
strap members pivoted at their forward ends to 25 tance between said brackets, and biased means
carried by the rear bracket and engageable in
said support and extending rearwardly of the
the aperture in said slidable drawbar to releas
latter and on upper and lower sides thereof, a
ably lock the latter in a forward position.
rear supporting bracket connecting the rear ends
5. An extension hitch comprising a primary
of said strap members and extending below the
lower strap member, a, forward supporting bracket 30 drawbar, a pair of brackets carried thereby in
longitudinally spaced relation, a slidable drawbar
carried by the lower strap member and also ex
carried in said brackets, the forward end of said
tending below the latter, and a slidable drawbar
slidable drawbar being turned downwardly to
carried by said brackets.
form a stop engageable with the forward bracket
2. A hitch device for tractors and the like hav
to limit the rearward movement of said slidable
ing a drawbar support and a transverse draft
drawbar, there being an aperture in the latter
member, said hitch device comprising a drawbar
spaced closer to said turned down end than the
including a pair of strap members connected at
their forward ends to said transverse draft mem
ber, said strap members extending rearwardly
of said drawbar support on opposite sides thereof,
a rear supporting bracket connected to the rear
ends of both of said strap members and extend
distance between said brackets, and a plunger car
ried by said rear bracket and engageable in said
aperture to releasably lock the slidable drawbar
in its forward position.
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