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Патент USA US2127223

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Aug. 16, 1938. '
R.‘
2,127,223
‘LE TOURNEAU
CARRYING SCRAPER
Filed Dec. 13, 1937
2}Sheets-Sheet 1
INVENTOR
I ,1’. 6. leTaz/meau
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m
AT ORNEY
Aug. 16, 1938.
2,127,223
R. 6. LE 'rouRNEAu
CARRYING SCRAPER
Filled Dec. 13'. 1957
2 Sheets-Sheet 2
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3
INVENTOR
'
. /F.6.Le7'0umeau
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*TERNEY
2,127,223
Patented Aug. 16, 1938
UNITED STATES PATENT OFFICE
2,127,223
CARRYING SCBAPER
Robert Gilmore Le Tourneau, Peoria, 1ll., assign
or to R. G. Le Tourneau, Inc., Peoria, 111.
Application December 13, 1937, Serial No. 179,481
8 Claims‘ . (Ci. 37-126)
a similar sheave l 5 mounted on ears l6 projectin
This invention relates to a medium-size carry
ing scraper having a front gate to form a closure -
for the load when the bowl of the scraper is in
carrying position and back plate movable to
5 push the load out from the front of the bowl,
and in which the gate and plate are mounted
for movement as a unit.
_
'
The principal object of my invention is to pro
vide, in a scraper having the above features, a
'10
simple mounting device ‘for the gate and plate,
and a simple and e?icient control mechanism
for such device.
'
The above object I accomplish by means of
such structure and relative arrangement of parts
16 as will fully appear by a perusal of the‘ following
speci?cation and claims.
-
In the drawings similar characters of reference
indicate corresponding parts in the several views:
Figure l is a sectional elevation of my im
20 proved scraper showing the bowl in a digging
position.
'
_
Figure 2 is a similar view showing the back
plate in a fully advanced load discharging posi
tion, and looking at the opposite side of the
25 scraper.
Figure 3 is a reduced-size top plan view’ of the
walking beam unit, detached.
,
Referring now more particularly to the char
acters of reference on the drawings, the scraper
30 comprises a bowl having a back and bottom
plate I which for substantially its entire extent
is curved about an axis A {and terminates at
its forward end in a blade 2. Side plates 3 rigid
rearwardly from the back of the bowl toward its
bottom.
A control cable 11, suitably anchored on one
block extends about the sheaves of the blocks, 5
upwardly over guide pulleys I8 and I9 respec
tively mounted on the‘beam 9 and adjacent to
oneside of the beam ‘I at its rear end, and then
forwardly and along beam 1 to and about a fair
lead unit 20 mounted on the standard 5, from
which the cable extends to a power drum on the
tractor by which the scraper is hauled.
It will thus be seen that by pulling on the- I
cable, the sheave blocks I4 and I5 will be drawn
toward each other and the bowl will be raised
relative to the ground. Similarly, slackening of
5
the cable will cause the bowl to be lowered. .
Stub shafts 2| are ?xed on the side plates 3
and are centered at axis A. Walking beams
each comprising a front section 22 and a rear 20
section 22a .alined with the front section are
pivoted on the shafts 2| for independent turning
movement thereon.
The beam sections are
spaced apart somewhat at their adjacent ends,v
a heavy ‘compression spring S being disposed
sections
on top -of
across
eachthe
pairspace.
‘of corresponding
The ends of the
springs are engaged in housings I-I ?xed on the
beam sections; Depending from and rigid with
the front beam sections 22 at their forward end
is a concavely'curved front gate 23, braced by
a cross beam 24 in front of the same and toward
the top. This gate ?ts between the side‘plates
3 and is adapted, when the walking beams are
with the plate I extend some distance in front \ in a certain position, to engage the upper sur 35
35 of the same. Rigidly secured on the side plates face of the blade 2 above the lower edge of the
at their forward end are upwardly and for
side plates and then form a front closure for
wardly converging beams 4 at the forward end
of which is a rigid depending standard 5 which
supports a swivel wheel truck 6.
40
z
'
A centrally disposed hollow beam 1 extends
rearwardly from the forward end of beams '4
to the back of and some .distance above the bowl;
diverging arms 8 extending downwardly from the
rear end of beam 1 to :a'connection with a cross
beam 9 onthe bowlatthet pandfback thereof.
The bowl, gbeams-l, standard 5,=1 beam 1 and
arms 8 thus form‘a'rigid'juniti-capable of swing
ing or tilting about, the v"wheels 6 as an axis.
' Pivbted on the side plates 3 toward the for
50 ward end thereof .as at P and extending rear
wardly are side arms lllconnected rearwardly
the bowl.
.
Secured on the under surface of the rear beam
sections 220. at the back is a flat plate 25, sub 40
stantially radial with the bowl plate I and hav
ing its rear edge disposed in running clearance
relation with said plate I. The depth of gate
23 is. such that when engaged with blade 2,
the back plate 25 is adjacent the top of the 45
bowl.
,
'
‘
Forward and downward movement of the back
plate 25, to effect a pushing of the load from the
bowl, is controlled by a cable 26. This cable ex
ends from the tractor, over a fair lead unit 21
n the standard 5, and thence to a sheave block
28 mounted at the rear end of beam ‘I on the
of the bowl by a cross beam H and having de
side thereof opposite ‘pulley l8, the cable then
pending extensions l2 on which the rear wheels ' passes over the sheaves ‘of this block and those
vl3 aresupportedk A central sheave block I4
is carried on the cross beam I l in alinement with
of another sheave block 29 mounted on the cross 55
2
2,127,223
beam 4 centrally thereof, the cable being suit
ably dead-ended on one block. Pulling on the
cable therefore swings the Walking beams up
wardly at their front end, lowering the plate 25
in a dirt discharging direction and at the same
time lifting gate 23 clear of the discharging dirt.
' The walking beam unit is swung in the oppo
-
applied to the beam rearwardly of its pivot
mounting to pull the rear portion thereof up
wardly.
_
3. In a scraper, a bowl having a back and bot
tom plate curved about an axis occupying a ?xed
position on the bowl, a tail plate to move down
the bowl plate from the top thereof to push the
site direction, when the cable 26 is slackened, by
a compression spring 30 extending lengthwise in
10 the beam. 1." A cable 3|, connected, to the inner
load therefrom, a front gate to close the front
of the bowl, means connecting the gate and tail
plate as a unit and in such relation that when
end of this ‘spring is wound about a constant
diameter drum 32 mounted beyond the rear end
of beam 1. Another cable 33 is wound on a spiral
drum 34 ?xed with the drum 32 and extends
15 downwardly to a swivel connection 35 with the
plate 25 between the walking beams. This drum
the gate is inclosing position the tail ‘plate is
adjacent the top of the bowl at the back, said
means including a. walking beam, means pivoting
said beam on the bowl for swinging movement
about said axis, a controlled pull cable applied
to the unit adjacent its rear end tending to swing
and spring control unit is the same as shown in . the unit in the direction opposite to that im
my copending application for patent Serial No.
102,951 ?led January 16, 1937, and gives a cor
20 responding pulling action on cable 33.
By reason of the separated and independently
'turnable walking beam sections and the compres
parted thereto by the pull cable.
4; In a scraper,~ a bowl having a back and
bottom plate curved about an axis occupying a 20
?xed position on the bowl, a tail plate to move
down the bowl plate from the top thereof to
‘sion springs therebetween, a valuable action is push the load therefrom, a front gate to close
obtained in the event that the bowl is ?lled to 'the front of the bowl, means connecting'the
25 such an exent that the dirt engages the back or
pusher plate 25 even when the latter is adjacent
the top of the bowl. In such a case, the front
beam sections turn when ?rst pulled by cable
33 without any movement being imparted to the
30 rear beam sections'until the springs are com
pressed as much as possible. The front apron
is thus raised somewhat, to provide an initial dis-'
charge opening of fair size, before the back plate
advances to push the dirt from the bowl.
35
From the foregoing description it will be read
ily seen that I have produced such a device as
substantially ful?lls the objects of the invention
as set forth herein. ’
I
While this speci?cation sets forth in detail the
40 present and preferred construction of the device,
still in practice such variations from such detail
may be resorted to as do not form a departure
from the spirit of the invention, as de?ned by
gate and tail plate as a unit and in such relation 25
that when the gate is'in'closing position the tail
plate is adjacent the top of the bowl at the back,
said means including a 'walking beam, means
pivoting said beam on the bowl for swinging
movement about said axis, a frame structure
rigid with the bowl and including a longitudinally
extending beam mounted above the bowl and
projecting forwardly from adjacent the rear end
thereof, a controlled pull cable connected to the
unit adjacent the forward end thereof, a sheave
‘mounted on the frame structure adjacent the
beam at its rear end and over which the cable
passes forwardly from the unit, a spring rotated
cable drum mounted on the frame structure ad- '
jacent and rearwardly of the beam, and another 40
cable engaging the drum and depending to a
connection with the unit adjacent the rear end
thereof.
-
'
,
the appended claims.
5. In a scraper, a. bowl having a back and hot
Having thus described my invention, what I * tom plate curved about an axis occupying a ?xed 45
45
claim as new and useful and desire to secure by
position on the bowl, a pair of transversely spaced
Letters Patent is:
walking beams normally extending lengthwise of
'
1. In a scraper, a bowl- having a circularly
curved back and bottom plate, a walking beam
the bowl, means individually pivoting the beams
on the bowl at the sides thereof for swinging
movement about said axis, a front gate secured‘
on and depending from the beams to close the
centeryof curvature ‘of the said plate for swing
bowl, a tail plate rigid with and extending be
ing movement in a vertical plane, a front gate‘ tween the beams on their under side and at the
depending from the walking beam to form a clo _ back to engage the bowl plate and disposed ad
55 sure .for‘the front end of the bowl when the beam jacent the top of the latter when the gate is in
is in a predetermined position, a dirt discharge closing positionjan upwardly and rearwardly
plate secured on the under side of the beam at ' projecting pull cable applied to the gate centrally
the rear end thereof to engage the bowl plate and between the beams, and an upwardly projecting
disposed substantially radially thereof; said dis
pull cable connected to the tail plate. centrally
50 extending lengthwise of the bowl, means pivoting
the beam in connection with the bowl at the
charge plate lying adjacent the top of the bowl
when the gate is in a bowl closing position, and
mechanisms to control the swinging of the beam.
2. In a scraper, a bowl having a back and bot
tom plate curved about an axis occupying a ?xed
position on the bowl, a walking beam extending
lengthwise of the bowl, means pivotally mounting
the beam on the bowl for swinging movement
about said axis, a front gate secured on the beam
to close the front of the bowl, a tail plate on the
70 beam disposed substantially radial of and adapted
to move down the bowl plate from the upper
end thereof to push dirt from the bowl with the
swinging of the beam, means applied to the beam
ahead of its pivot mounting to pull the front por
75 ‘tion thereof upwardly and rearwardly, and means
between the beams.
'
6. In a scraper, a bowl having a circularly
60
curved back and bottom plate, ‘a walking beam
extending lengthwise of the bowl, said beam com
prising separate front and rear sections pivoted
in common for independent turning movement on 65
the bowl at the center of curvature of said plate,
a front gate depending from the front beam
section to form a closure for the front of the
bowl when the walking beam is in a predeter
mined position, a dirt discharge plate secured on 70
the rear beam section to engage the curved bowl
plate and disposed substantially radially thereof;
said discharge plate lying adjacent the top of the
bowl when the gate is in bowl closing position,
means applied to the front beam section to 75
names
a compression spring extending lengthwise of the
and means between‘the beam sections yieldsbly
walking beam across the space between the beam
sections and held at its ends on said sections.
8. A. structure as in claim 6, in which said last
named means comprises a spring connected at 5
its ends on said beam sections.
ROBERT G. LE TOURNEAH
resisting corresponding movement of the reel“
beam section.
91
3
pull the same upwardly about its pivot mounting
7. A structure as in cieim 6, in which the beam
sections are alined but spaced apart at-their ad=
jacent ends; said last named means comprising
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