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„ G, w, MORK
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scRAPER
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Filed Aug. 2, 1943l
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2,408,806
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mVENToR
BY
ATTORNEYS
^ Oct. 8, 1946.
G. w. MoRK
2,408,806 `
SGRAPER
Filed Aug. 2, 1943V
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ÚCÈ. 8, 1946.
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Q_ w, MORK
2,408,806
SCRAPER
Filed Aug. 2, 1943
4 sheets-sheet s
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INVENTOR.
ÈY
ATTORNEYS
@CL s, 35946.
G, w_ MQR'K
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2,405,806
SCRAPER '
Filed Aug. 2, 1943
4 Sheets-Sheet 4
INVENTOR.
BY
Mgg/W
AUORNBYS.
'2,408,806
Patented Oct. `8, 1946 l
UNITED STATES PATENT OFFICE
2,408,806
SCRAPER
.George W. Mork, South Milwaukee, Wis., assignor
to Bucyrus-Erie Company, South Milwaukee,
Wis., a corporation of Delaware
»
.
.
Application August 2, 1943, Serial No. 495,981
(Cl. 37-133)
11 Claims.
2
1
My invention relates to new and useful im
movements in wheeled Scrapers, and more par
ticularly to that type of such Scrapers, in which
the bowl lills at its front end and dumps at its
rear end.
Y
ln devices of this sort, the bowl is pivoted, ad
jacent its rear lower corners, to the carrying
frame. A single hydraulic cylinder, or a pair of
cylinders, mounted on the frame, serves to rotate
the bowl about its pivot, in either direction from
its neutral (i. e., carrying) position.
,
Each end of the bowl is provided with a clo
sure, the front closure being known as the
“apron,” and the rear closure being known as the
“end gate.”
In addition to my principal objects, above
stated, I have worked out a number of novel and
useful details, which will be readily evident as the
description progresses.
My invention consists in the novel parts and
in the combination and arrangement thereof,
which are defined in the appended claims, and
of which one embodiment is exemplified in the
accompanying drawings, which are hereinafter
particularly described and explained.
Throughout the description, the same reference
number is applied to the same member or to sim
ilar members.
.
Figures l, 2, and 3 are side elevations of one
variant of my scraper, in digging, carrying and
dumping positions respectively.
When the bowl tips downward into its digging
position, the apron opens. When the bowl tips
VFigure 4 is a plan View of that same variant, in
carrying position.
upward into its dumping position, the end gate
.
Figure 5 is an enlarged side elevation of the
opens.
But, although these functions have been at 20 reversible side cutter, in place.
Figure 6 is an enlarged end elevation of the
tained in the prior art with a fair degree of sat
reversible
side cutter, taken along the lines Ii-B
isfaction, I have found it desirable to eifect the
following improvements.
of lï‘igure 5.
.
-
Figures 7, 8, and 9 are side elevations of a sec
The arms of the apron should be lengthened,
ond
variant of my scraper (namely the variant
25
and should be pivoted adjacent the rear end of
which involves the bowl-lowering feature), and
the bowl. This causes the apron to rise nearly
show the scraper in digging, carrying and dump
vertically, when opening, thus minimizing any
lendency to jam.
The lower forward edges of the side plates of
the bowl should be reinforced with a side cut
ing positions respectively.
`Figure l0 is a plan View of this same variant,
30 in carrying position.
.
Referring now to Figure 4, we see that II, II
ter, which should be reversible.
are
the side beams, and I2 is the cross beam, and ~
The end gate, instead of being rigidly mounted
I3 is the tongue, of the main frame of my scraper.
on the arms which manipulate it to open it,
The tongue I3 extends to the tractor (not shown)
should be pivotally mounted thereon, so that (l)
it will normally be assured of full closing, and 35 which pulls my scraper. Wheels i4, I4 support
the frame.
(2) it will remain open, if rocks and other ob
Turning now more particularly to Figures l, 2,
structions prevent its closing, rather than to
and 3, We see that the bowl I5 is pivoted at IS
stra-in the mechanism by attempting to close it
to the side beams II. The bowl has a digging
forcibly, and (3) when the bowl is tilted from
'
digging position to carrying position the rear 40 edge I1.
Hydraulic cylinders I8 are mounted in an ele
vated position on the main frame, well forward
and out of the way of the digging elements. The
cylinders rotate the bowl I5 about its pivot t5,
gate will loosen slightly so as not to jam.
Means should be provided to strengthen the
bowl, and at the same time increase its capacity
without increasing its size or materially increas
45 by means of piston rods I9, rocker-arms 20, and
ing its weight.
connecting-rods 2l. The cylinders are fed from
Means should be provided to lock the bowl in
a source (not shown) on the tractor, by‘means
carrying position. so as to take the load off the
of piping (not shown), and may be controlled,
hydraulic cylinders, and this lock should be auto
preferably from the driver’s seat (not shown) , in
matically disengageable.
The bowl-lowering device of U. S. Patent No. 50 any convenient conventional manner (not
shown).
2,308,534, issued January 19, 1943, to 'I'homas R.
Considering the carrying position of Figure 2
Paulsen, should be adapted to use on this type
as neutral, it will be seen that a retraction of
of scraper.
piston-rod I9 will lower the bowl I5 to the dig
The attainment of these desiderata is the prin
cipal object of my invention.
' Y
.5.5
ging position shown in Figure 1,. and that al.
2,408,806
n)
4
thrusting ont of this piston-rod will raise the bowl
to the dumping position shown in Figure 3.
The side walls of the bowl are reinforced by a
a rod 3f', capable of engaging in a socket 3G on
the rocker-arm 20, when in carrying position, as
shown in Figure 2. When not in use, the rod 35
lies on the side beam Il, as shown in Figures 1
and 3. It is to be noted that this device, although
set manually, can be unset by merely tilting the
system of bracing ribbing 22, on which are l0
cated all the pivot points (hereinbefore or here
inafter referred to) , and one of the points of at
tachment of the side cutter (hereinafter re
ferred to).
bowl slightly toward dumping position.
The lower portions of the forward edges of the
There is also on each side plate a bracing rib
side plates of the bowl I5 are each reinforced by
a cutting plate 3l, which is shown in more de
tail in Figures 5 and 6.
Turning to these ñgures, we see that the cut
22A, which performs three functions: i. e., it re
inforces the side plate, it serves as a point of at
tachment for the side cutter, and it serves as a
rubbing plate and spacer for the arms 25 of th
apron 2f.' (hereinafter referred to).
'
The bowl i5 is also reinforced by two cross
braces 23, of triangular cross-section. The for
ward one of these two braces serves the dual
purpose of a cross-brace and a baille, I having
found that its substantial downward rearward
face is sufficient to prevent clirt from spilling for- f
wardly over the top of the apron. Thus this
brace greatly increases the capacity of the bowl.
The apron 2d is rigidly secured to two apron
arms 25, which in turn are pivoted to the bowl
l 5 at 26, adjacent to the pivots 2l of the connect
ing-rods 2l.
ting plate 3l' has a cutting edge 38, and live bolt
holes, three of which accommodate bolts 39 for
bolting to the side plates of the bowl i5, and two
of which accommodate bolts 40 for bolting to the
bracing ribs 22 and 22A.
It will be noted that these cutting plates 3'!
are symmetrical, and hence reversible by inter
changing them.
Inasmuch as the Wear comes
on the lower portion of each, this reversibility
prolongs their life.
Along the upper edge of each side plate of the
apron 2è .is a wiper bar 4|, which partially closes
the gap between these side plates and the side
plates of the bowl I5.
Turning now to Figures 7 to 10, let us consider
the second variant of my scraper. Insofar as
The connecting-rods 2l extend to the rear be
yond pivots 2l. Arms 28 of end gate 29 are piv
oted to the connecting-rods 2i at SG adjacent
the parts thereof are the same as those of the
pivots
If a line be drawn, on Figures 1 and 2, 30 ñrst variant, they will not be numbered nor dis
from pivot point 2ï to the point where the bot
cussed, except so far as necessary to illuminate
tom of end gate
rests on the rear end of the
the description of the changed parts.
iioor of bowl I5, it will be seen that pivot point
In this second variant, instead of the wheels
35 lies approximately the same distance above
ill icing pivoted on side beams Il as in the iirst
that line in Figure i (the carrying position) as it 35 Variant, they are pivoted on extensions 42 of
lies below that line in Figure 2 (the digging posi
rocker-arms EEA.
tion). This means that, when the bowl is tilted
Accordingly the entire scraper is lowered for
from the digging position to the carrying posi
digging (Figure '1); is raised for carrying (Fig
tion, pivot point Sil moves in a short arc which
ure 8) ;,and is raised slightly, but not appreciably,
is substantially a straight line perpendicular to 40 farther, for dumping (Figure 9). During dig
the above-mentioned line. This motion tilts the
ging, this expedient keeps the bottom of the bowl
end gate rearwardly very slightly about its bot
more nearly level than would otherwise be the
tom point, thus loosening it slightly, and thus in
case, and thus renders the bowl more easy to iill.
suring against it jamming.
Having now described and illustrated two forms
A bracket 3i on each end gate arm 28 carries
r of my invention, I wish it to be understood that
an adjustable stop 3E, capable of engaging the
my invention is not to be limited to the speciñc
rear end of connecting-rod 2l. ri‘hus, by the
form or arrangement of parts hereinbefore de
engagement between this stop and the rear end
of the connecting-rod, the tilting of the bowl
from the carrying position of Figure 2 to the
dumping position of Figure 3, will cause the end
gate
to open; but, in the carrying position of
Figure
the stop will come away from the con
necting-rod 'so that the end gate will rest on its
closed position on the bowl; and, if rocks or other
obstructions prevent the gate from closing, the
bowl can nevertheless return to carrying posi
tion, without strain, in spite of the gate being
jammed open. This form of end gate construc
tion can be employed on other dumping contain
ers than scrapers, and even on the front ends of
front-dumping containers.
The apron
ner.
`,
,
is opened in the following‘man
When the bowl l5 is tilted from the car
rying position of Figure 2 to the digging position
of Figure l, rails 34 on the bottom of the apron
engage and roll upon rollers 33. These rollers
are adjustable in any convenient manner, three
scribed, except insofar as the limitations are
specified in the appended claims.
Whenever in the claims I use the phrase “piv
otally supported by,” it is intended to be generic
to a direct pivotal support or an indirect pivotal
support, at the location specified.
I claim:
l. Ina dumping container, the combination
of: a frame; ground supports for said frame; the
container proper, pivoted at one end adjacent its
bottom on the frame, for tilting movement in a
vertical plane, said container proper being open
at its pivoted end; a longitudinally reciprocable
rod on each side of the container proper, pivoted
means
to theside
for forcibly
thereof, reciprocating
and supportedthese
by therods; an
end gate pivotally supported by the rod-con
' tailler-proper assembly, adjacent the pivotal con
nection between the rods and the container prop
er; and stop means between the gate and the
rods, to limit the downward swinging of the gate
with respect to the rods.
the rollers, the wider will the apron open duringV 70 2. A dumping container, according to claim 1,
digging.l Thus the extent of opening of the
furthercharacterized by the fact that the stop
positions being shown in Figure 1. The higher
apron can be related to the-stickiness or" the ma
terial beingexcavated.
.
.
j
`
means are adjustable.
3. A dumping container according to‘ claim 1,
To take the load oiîthe -cylinders I8 Iduring
further characterized by the fact that themeans
carrying, there is pivoted on each side beam Il, 75 for reciprocating each rod comprises: a rocker
2,408,806
arm, pivoted on the frame; a cylinder-piston as
sembly pivoted on the frame and on the rocker
arm; and a pivotal connection between the
rocker-arm and that end of the rod furthest
from the gate.
4. In a dumping container, the combination
of: a frame; ground supports for said frame;
the container proper, pivoted at one end adjacent
its bottom on the frame, for tilting movement in
a vertical plane, said container proper being open
at its pivoted end; a longitudinally reciprocable
rod on each side of the container proper, pivoted
to the side thereof, and supported by the frame;
means for forcibly reciprocating these rods; an
end gate- pivoted on these rods, adjacent their
points of pivotal attachment to the container
proper; and stop means between the gate and
the rods, to limit the downward swinging of the
gate with respect to the rods.
5. A dumping container, according to claim 4,
further characterized by the fact that the stop
of pivotal support of the end gate when the con
tainer is in digging position, is located a given
distance below the line which runs from the
point of pivotal attachment of the rod and the
container to the point of contact between the
bottom of the gate and the container; and, when
the container is in carrying position, is located
approximately the same distance above that line.
9. In a scraper, the combination of : a frame;
ground supports for said frame; a bowl pivoted
at its rear end adjacent its bottom on the frame,
for tilting movement in a vertical plane, said
bowl being open at its front end, and having a
means are adjustable.
digging edge at its front end; a longitudinally
reciprocable rod on each side of the bowl, piv
oted to the side of the bowl; a rocker-arm piv
oted at its lower end on the frame, and at its
upper end on the forward end of the rod, and
having a downward extension pivoted on one of
the ground supports; and means to rock the
rocker-arm; whereby, when the rocker arms are
rocked to tilt the bowl forwardly into digging
6. A dumping container according to claim 4,
further characterized by the fact that the means
position, the frame is lowered with respect to the
ground supports, thus lowering the bowl pivot.
for reciprocating each rod comprises: a rocker
10. In a scraper, the combinaion of: a frame;
arm, pivoted on the frame; a cylinder-piston as
ground supports for said frame; a bowl pivoted
sembly pivoted on the frame and on the rocker
arm; and a pivotal connection between the
rocker-arm and that end of the rod furthest
at its rear end adjacent its bottom on the frame,
for tilting movement in a vertical plane; a lon
gitudinally reciprocable rod on each side of the
bowl, pivoted to the side of the bowl; a rocker
from the gate.
7. A dumping container according to claim 4,
further characterized by the fact that the point
of pivotal support of the end gate is so located
below and toward the dumping end of the con
tainer from the point of pivotal attachment of
the rod and the container that when the con
arm pivotally supported by the frame, and piv
oted on the forward end of the rod; means to
rock the rocker-arm; and a lock between the
frame and at least one rocker-arm, whereby to
hold the bowl in carrying position, said lock com
prising a downwardly facing socket carried by
tainer is tilted from digging to carrying position
the rocker-arm, and a cooperating compression
the first above-mentioned pivot will move in a
bar, pivotally supported by the frame, and tilt
path substantially perpendicular to thel line
able into end engagement with the socket.
11. A dumping container, according to claim 4,
further characterized by the fact that the point
of pivotal support of the end gate is located a
slight distance toward the dumping end of the
which runs from the second above-mentioned
pivot to the point of contact between the bottom
of the gate and the container, thereby slightly
loosening the gate from the container in carry
ing position, and thus avoiding jamming the con
tents of the container.
8. A dumping container according to claim 4,
further characterized by the fact that the point
container away from the pivotal axis of connec
tion of the rods to the container.
GEORGE W. MORK.
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