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Патент USA US2409520

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Oct. „15, 1946.
, w. C. làosENTHAL ETAL
/ %%
ì l2,409,516
Patented Oct. 15, 1946
>unirsi) STATES PATENT ortica
William C. Rosenthal and Clarence A. Hubert,
Chicago, Ill., assignors to International Harves
ter Company, a corporation of New .lersey
Application July‘12, 1944, ScrialtNo. 544,612
3 Claims.
(Cl. 151--‘-32)
Fig. 3 is a perspective view of the seating collar.
Referring to the drawing, numeral lo desig
nates a longitudinal extending body portion of a
tractor having front wheels Il. Attached to the
forward end of the tractor and to the side thereof,
by bolts l2, is an implement attaching plate i3,
lt is known, particularly in the agricultural in-_
having a laterally extending tool bar I4 welded
dustry, to provide capscrevfs on tractors and the
thereto forthe mounting of implements. It will
like for the attachment of implements, the cap
be noted that openings l5 are provided in plate
screw forming a part of the tractor supporting
structure and remaining therewith when the im 10 i3 for securing the plate between the tractor body
and the heads of the bolts i2. The openings l5
plement is removed to be replaced by another iin-A
are preferably countersunk to receive the tapered
plemcnt, or to free the tractor for the perform
This invention relates to the attachment of
implements to tractors and the like, and has >par
ticular reference to a tractor` having improved
means for the quick attachment'and removal of
portion of the bolt-head, as seen in Fig. 2.
ance of other duties. The capscrew is usually in
Referring particularly to Figure 2, it may be
serted into a tapped opening in the tractor body,
and one of the principal objections thereto has 15 noted that the body of the tractor lil has been
provided with a tapped opening or threaded re
been the tendency of the screw to become un
cess l5 having threads l1 and an unthreaded
seated from the tractor body when not in use, and
portion I8 adjacent the mouth thereof. The
to be lost particularly when a blind opening is
opening is further provided with a counterbore
provided. The customary procedure to prevent
unthreading of the screw from its seat when a 20 I!) for a purpose which will hereinafter become
blind opening is provided has been to tighten it
Adapted to be received in tapped opening I6 is
and rely upon the frictional engagement of the
a bolt I2 having a tapered head 2|, a threaded
head with the tractor body. However, the human
shank 22, and a neck portion 23 having a diameter
factor is variable and the loss of many capscrews
has testified to the failure of this procedure. 25 less than the minor diameter of threaded portion
Likewise, where the end of the screw extends
Adapted to be threaded upon the shank 22 of
through the retaining structure, a cotter pin is` bolt yi2 is a retaining collar 24, the outer diam
often provided to retain the screw. However,
this method is feasible only if sufficient clearance 30 eter of which is slightly greater than the diameter
of counterbore i9.
is provided for the end of the screw. In many
As pointed out before, it is important to provide
instances the tapped opening must be blind, and
against loss of the capscrew from the tractor
to prevent the lossuof capscrews presents a more
upon removal of the implements and the attach
complex problem. The present invention solves
ing plate therefrom. To solve this problem, ap
this problem simply and effectively.
plicant threads collar 24 upon the shank 22 of his
An object of the present invention is to provide
bolt until the neck portion 23 is reached. Since
an improved capscrew and seat construction for
the diameter of neck portion 23 is less than the
a tractor or the like to facilitate the attachment
diameter of the collar, the collar rests loosely
of implements thereto.
thereupon. The bolt is then inserted into the
Another object is to provide connecting means
for the quick attachment of an implement to a 40 tapped opening l5 and threaded therein until col
lar 24 is pressed between the bolt-head 2l and the
tractor, or the like, which connecting means may
tractor body lil. As already noted, collar 24 is
be readily removed from the tractor, if desired,
slightly greater in outer diameter than the diam
and as quickly replaced, but will not become un
eter of counterbore I9. However, the periphery of
seated as a result of the shocks to which the trac
the collar is preferably slightly beveled in order
tor may be subjected.
to facilitate its insertion into the counterbore.
Other objects and advantages will become clear
The bolt is then screwed into position, the pres
from the detailed description to follow when read
sure applied against the collar 24 forcing it into
in conjunction with the accompanying drawing,
the counterbore. The collar is then separated
from the tapped portion of the opening lo by the
Fig. 1 is a view in side elevation of the front end
unthreaded portion I8.
of a tractor with the device of the present inven
Since there is little likelihood of the threads of
tion incorporated therein;
collar 24 being in phase with the threads of shank
Fig. 2 is a section taken along the line 2 of Fig.
22, after insertion of the collar in counterbore I9,
1 and showing the seating of the capscrew in the
55 bolt l2 cannot be entirely unscrewed from the
body of the tractor; and
tapped opening I6 Without the exercise of force
ly seated in the counterbore with the threads out
sufficient to unseat the collar 24. In order to in
sure that the collar 24 will be out of phase with
of phase with the threads of the recess.
2. In a work piece or support, a threaded recess,
a coaxial unthreaded section and counterbore ad
the shank 22, the operator is required only to ad
just the circumferential position of the collar in
jacent the mouth thereof, each of progressively
the counterbore I9. Therefore, when bolt I2 be
larger diameter, a headed screw having a
threaded end fitted in the recess with a neck por
comes loosened as a result of the jarring of the
tractor and the like, the bolt will only be with
tion of lesser diameter, the threaded end being
drawn until the threads of shank 22 contact collar
of greater axial length than said unthreaded sec
24, whereupon the collar serves as a stop and in 10 tion, said screw being adapted to be partly with
hibits further withdrawal of the bolt.
drawn to receive attaching elements between the
Applicant has thus devised a simple, novel, and
screw head and the support, and means for in
eiiicient capscrew and seating combination for a
hibiting removal of the screw from the support
tractor, wherein the capscrew may be removed
comprising an internally threaded collar friction
readily, if desired, but is retained with the tractor
and the loss thereof, due to the bolt shaking loose
ally held in said counterbore with the threads out
of phase with the threads of the recess.
from the tractor, prevented.
Having described the invention, it should be
3. In a work piece or support, a threaded re
cess, a coaxial unthreaded section and counter
understood that modifications may be made
bore adjacent the mouth thereof, each of pro
therein without departing from the spirit of the 20 gressively larger diameter, a headed screw hav
invention or the scope of the appended claims.
ing a threaded end ñtted in the recess with a neck
What is claimed is:
portion of lesser diameter, the threaded end being
1. In a work piece or support, a threaded re
of greater axial length than said unthreaded sec
cess, a coaxial unthreaded section and counter
tion, and a retaining collar frictionally held in
bore adj-acent the mouth thereof, each of progres
the counter-bore and engageable with the thread
sively larger diameter, a headed screw having a
ed portion of the screw to inhibit withdrawal
threaded end fitted in the recess with a neck por
tion of lesser diameter, the threaded end being of
greater axial length than said unthreaded section , .
and a retaining collar, internally threaded, tight
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