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Патент USA US2121240

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June 21,1938.
Filed Sept. 21, 1955
[Eli/la?” WlaJi/A/
Pianos June 21, less
._ 251121140? :
EiisworthW.Anstin.OedarBapIds,lowa, me
:ntlgmn‘losne 1
l. I
Corporation, a
to Killsler Maple
tion ot'O'sli-
Rornla '
Application mm a. 1935.
This-invention relates‘ to earth moving devices
and has particular relation to a device oi‘the so,
ed roll-over scraper type ‘in which ~earth is
dug by a scraper blade and deposited in a bowl
No. 41,514
within the scope of the appended claims. with:
out departing from the spirit of the invention.
In said drawing:-
Figure 1 is a view in perspectivevof an. earth
5. and in which the material is dischargedby per-I imoving‘device constructed according to my in-- 5
mltting the bowl to roll on the ground.
It is desirable in scrapers of this character that
‘ means he provided for decreasing and increasing
the angle or attack or the cutting blade as the
vention as it appears‘ in normal or cutting cone‘ ‘
dition before being loaded with earth.
‘ Figure 2 is another view in perspective of the
device shown in Figure 1 as it appears while vin
‘ 10
10 ‘digging eiiort required becomes harder or easier operationinpickingupaloadofeartht
Figure 3 is a fragmentary view in perspective of
and decreasing the angle when the bowl is ?lled
one or the bowl latching members or the‘ scraper. ’
with material.
In the devices or the prior art this has been 1 Figure 4 is a view partly in the elevation and accomplished by providing a lever mechanism. ‘partly in sections or the shock absorbing mecha
15 which rolls the bowl of the scraper forward and nism of the‘ device shown in Figures 1 and 2, and 1‘
‘ backward in its bowl engaging structure as the
disgingbecame easier or harder.
in my present invention I propose to tilt both
the bowl‘ engaging structure and the bowl as a
‘?gure ii is a fragmentary plan view of the ad- '
justable connections by which the pivot armsLal-e ‘
v connected to the pivot plates. -
. . 1
unit thus avoiding the necessity for the compli» ticularly to Figures 1 >and‘2 thereof. a preferred 2°
vsated, expensive and unreliable lever and link-' iorm oi roll-over scraper constructed according .
> ing mechanism necessary in the devices or the
prior art.
Rolex-ring now to the .drawing audlmo're
to my invention consists oi a- bowl it,‘ a tongue
and drawbar assembly ii and. means indicated at '
It is the general object ‘of my invention'to pro-. it for operating and actuating the scrapeniin
25 vide a scraper of the so-calied roll-over type in‘ eluding means for tilting the bowl in accordance %
. which the angle of attack of the cutting edge is with-the cutting resistance.
' varied inversely in accordance with the drawba
~The bowl is of more orless'standard construc- '
tion and employs a pair of disk-like end members '
on the scraper‘
Another object o! my invention is to provide an ' orheads
cal plate it
I3 connectedhy a semi-'cyilndrlé
plate. or bowl
3“ improved scraper structure which eliminates
' parts previously i'ound‘necessary.
Another object of my invention is to provide a
new and novel modeior operation of sucha scraper
hereby many parts hitherto round n ow: . l.
of angle braces or ribs is‘. The ribs it not only '
' serve to brace the bowl and connect the bowl with
the heads Ill and ill but alsoserveas a means of 35
be eliminated.
Another ‘object or my invention is to provide a ' eg and supporting a cutting blade It. The
resilient means for cmlnteracting the pull on the
scraper blade.
Another object of my invention is to provide
- '40 means for housing the operating andcontrol
sheet as it may hetermed, is suitably braced by‘
means oi a longitudinal ?ange i1 and a plurality
of such a'scraper.
. q
Another object of my invention is to provide
means for varying thecoupling of the scraper to
I-thetongueor drawba'rbyjwhichthescraperis
' 1“ towed.
improved operating and sculpting mechanismjor
heads i3 and M,_ support inwardly extending _
curved plates or shoes 2i and 22, and these shoes
serve to support the bowl when it is being dumped.
the bowl sliding on these shoes while in thatposi- 4°
_A portion of each of the heads l3 and I4 ‘is
?attened as indicated at 23 adjacent the cutting
blade is so that the blade, together with the ad
'Jaoent portion or the bowl sheet is and‘vthe ?at 4?‘
portions-oi’ the heads I3 and il, form a ?at sur- .‘
_ race for supporting the bowl as it moves over- the
ground while in the cutting position. The heads
Other and further i'eatmesand objects of the .13 and I4 arereiniorced at their eentersbymeans
5° invention will bemore-apparent to those skilled I or the reini'orcing Plates :1 and a. Heavy bolts w
scrapers of this character.
ingdrawing and iollowing speci?cation. wherein
is disclosed a
embodiment o!
'the invention,- ‘with the‘,
II tlmt such changes-may be made therein as tall
21 and”
I3 and Il.
Itand through the pivot plates-IO and II. the
outer portion- of the bolt being provided
freely rotate. The sleeves or bushings 34 are path of the stops 32 and 33 but preventing them
slightly longer than the thickness of the plates 24 from dropping below that path. When the bowl
and 3| in order that, when the nuts ll are drawn is rotated forward or backward it may rotate
up, the bolts 11 and II and washers 40 will clamp until the stops 32 or 33 engage the latches thus
the bushing tightly against the respective plates - permitting the operator to hold the bowl in
24 and 2‘.
"digging” or “bulldozing" position.
Two sets of bosses or stops I2 and I! extend
outwardly on either side from the heads I! and
, l4, also for a purpose to be hereinafter ex
The tongue 44 is secured to the drawbar by
means of two sets of links ‘H and 12. The links
‘H are comparatively short and forward move
ment of the drawbar H, with reference to the 10
tongue 44, results in very little or no spreading
The pivot plates 29 and ii are utilized in
pushing and pulling the bowl about over the apart of the rear ends of the tongue and draw
surface of the ground and these pivot plates are bar. The links 12 are approximately twice as
connected to a pair of forwardly extending bowl long as the links II and when he drawbar ii is
15 pivot arms 34 and 46. The adjacent portions of - pulled the forward motion of the drawbar rmults
the pivot arms 84 and 36 and of the pivot plates in rotation of the links ‘H and ‘I2 and raising
20 and ii are vertically toothed as indicated at of the front end of the tongue 44 to a greater ex
31 ‘and the pivot plates are slotted as indicated tent than the rear end is-raised. It is of course
at 34 in order that the combined arm, formed by understood that if the links 'II were of the same
20 the pivot arms and the pivot plates, may be length as links 1!, the front end of the tongue 20
lengthened or shortened as desired to permit the would be raised'appreciably but to a lesser ex
bowl to be tilted or shifted slightly about its tent than in the case of my preferred arrange
longitudinal axis with reference to the tongue to ment.
vary the normal angle of attack of the cutting
Now since the position of .the bowl “land the
blade. Lengthening the combined arm formed cutting edge ID is determined by the position of
by the pivot plates and pivot arms will ‘cause the the tongue “because the tongue while in the
angle of attack of the cutting blade to be in
digging position is directly connected to the bowl
creased. Shortening the combined arm will cause through the agency of the tie members 43, pivot
a decrease in the'angle of attack of the cutting arms 46 and latch arms ii, any tilting of the
blade. The pivot plates and pivot arms are se
tongue 44 about a transverse axis will result in
cured to each other by means of bolts 39.
rotating the bowl about its longitudinal axis.
The bowl pivot arms 36 are secured by means ‘That is, raising of the front end of‘ the tongue
of bolts 4| to a pair of upright triangular plates 44 to a greater extent than the rear of the tongue
I 42 and also to a pair of inwardly and forwardly 44 will result in rotating the bowl in a clockwise
.6 extending tie-members 43. The tie members 43 direction when viewed from the right to thus
converge inwardly and are secured on opposite raise the cutting edge, while a lowering of the
sides of __a tongue 44 by means of a bolt or pivot front end of the tongue 44 will result in a lower
pin 48. The tongue 44 is preferably a hollow ing of the cutting edge. Thus decreasing or in
structural‘ steel member open at the forward creasing the depth of cut is accomplished by
and rear ends thereof. A pair of tubular mem
raising or lowering the front end of the tongue
bers, which may be termed the cross tubes or 44. It is apparent that, since the links 12 are
torque tubes 45 and 41, are welded at their inner longer than the links ‘H, the more the drawbar
ends 48 to opposite sides of the rear end of the‘ l I is pulled forward with reference to the tongue
tongue 44 and the outer ends of these tubes are 44 the greater will be the tilt of the tongue 44
engaged to the respective plates 42 as by welding and, consequently, of the bowl l0. _
them to the plates. The tubes are also secured i It is necessary to provide some resilient means
to the tongue by means of bracing members or of retarding upward movement of the front end
gussets 49. The tubes serve as pivots for the of the tongue 44 since, if no retarding effect was
.upper ends of links ‘H.
The upper rear end of the tongue 44 is slotted
as indicated at ii in order to receive a trip lever
52 within the tongue and this trip lever is actu
_ ated by an operator on the towing vehicle 53
bymeans of a rope 54. An upwardly projecting
post It is provided on the upper face of- the
tongue 44 and a clevis I‘! is attached to the trip
lever '42 together with a spring It to hold the
trip lever 52 normallyjin a rearward position as
indicated in Figure 1. The lower end of the trip
lever II is secured on a trip shaft 4|‘ and pulling
therope“ rotatesthistripshafttoraiselatch
armsiloneoneachendofthe bowLtodis
engage the latches 44 from the stops 8! or II.
The latches 44, provided on the‘ends of the
“ latch arms 42, are removable. It is sometimes de
sirable that these latches be removed to permit
the bowl'to rotate or in'order. that the latches
may be readily replaced when they become worn.
Releasing the pull rope 44 of course permiisthe
the ‘stops 8! or. 83;‘ These latches areso ar
provided, the cutting edge would come out of‘
the ground as soon as a pull was applied to the
drawbar Ii. This retardingv éifectds produced
by means of a spring II which is housed in a
cylindrical housing 42, as illustrated in Figure 4.
The cylindrical housing 82 is pivotally engaged
to the drawbar [I by means of pivot pins 88
which are received in suitable trunnions 44 on‘
the drawbar Ii. The housing 82 ms th
about on the trunnions 04.
y us pivot
An adjusting screw 44 extends through the
center of the coil’ spring II and an adjusting nut
41 engages the forward end of the spring It and
is ‘threaded on the end of the adjusting‘screw
46. The adjusting nut 41 may be rotated by
means of a long stem 44 which extends su?lcient
" 1y beyond the housing 42 that it may be rotated 65
by means of a suitablerod (not shown) which
may be engaged in the opening I! in the pro
jecting portion of the adjusting nut. The rear
end of the adjusting screw, 44 is pivotally en
gaged to the- front end of the tongue 44 by 70
means of the pivot pin 44 which passes through
ranged that when the pull rope .is pulled‘the ,a suitable
I eye ’ll mule
bowl may rotate in .either direction but when
itisreleslsdthetrip lever lf'willstrike the
stop I. permitting the latches‘to drop into the
.ing screw 44.1
rear end of the adjust
- The forward end of the drawbar is provided
' amt,
‘1 we
that the scrapermayhave substantially universal - incidence of the cutting edge, a' drawbar
_ ‘
with reference to the towing vehi
substantially parallel differential links at front
In operation the swivel I3 is secured to a tow
ing vehicle such as the tractor II and the op
and drawbar for tilting the tongue with refer- '
ence to the drawbar, and resilient means for re
and rear on the tongue connecting the tongue
erator allows-the trip rope to be slackened suf
sisting tilting of the tongue with reference to
the 'w,\
2. In a scraper including ,obucket. a draft
ficiently to allow the latch arm ‘,2 and the latch
M to engage the stops it on the bowl when the
‘latter rotates in either direction. The tractor
is driven forward and the cutting edge I! of
the scraper begins to out into the earth. thus
picking, up earth and depositing it in the bowl.
As the cutting edge cuts into the earth the pull
means including a tongue and means for rigidly engaging the tongue to the bucket, is drawbar 10
extending beneath the toe and parallel there
to, a link connecting therear ends of the tongue
and drawbar and a longer-dink intermediate the
becomes greater on the drawbar I i and the draw- ‘ le
of the ‘drawbar and=tongue for pivotally ‘
15 bar is pulled forward _ with reference to the
connecting these two members, wherebywhen
tongue it. As the drawbar is pulledforward
loading is applied to the bucket as in digging,
the links 12 are rotated to thus raise 'the front the tongue is drawn bacrd with reference to
end of the tongue it to a greater extent than the drawbar to tilt the ‘tongue with. reference to
the rear ‘end. Since the ‘entire bowl and tiev the drawbar to'vary’the angle of incidence of the ‘
members are in effect secured tothe tongue It cutting edge of the bucket. .
I . 20
this results in decreasing the angle of attach
oi the cutting edge it. '
8. In a scraper including a bucket, alton'gue
‘engaged to the bucket, a drawbar, a“sp\ring
means pivotally attached to the forward end\of
Since upward movement of the front end of
the tonguev 44 alsovmeans rearward movement the tongue and the forward end of the drawbar
thereof in respect to the drawbar, the adjusting , whereby a roughly triangularly disposed relatioing
screw 88 is drawn rearwardly against the com
is formed with the tongue asthe base ,of. the
pression of the spring 8|. fl'hus thegreater the triangle,
the spring means as one short side of
resistance met by the cutting edge the more the
frontv end of the tongue “is raised but, as the
front-end of the tongue 44' is raised, more and
the triangle and the drawbar as the other short
side and means ,for causing upward tilting of
the two'memhers forming the shorter sides‘ of 30
more resistance to upward movement is encoun
tered by reason of the spring Ii so that ?nally a
the triangle to tiltthe bucket.
position of equilibrium is reached at which the
angle of the cutting edge is no longer raised. 11', however, harder ground is encountered, the front
edge of the tongue 44 is raised still further
means ‘for attaching the yoke member in fixed
against the compression of the spring ll to.cause_
the angle of attack of the cutting edge to be
'lessened resulting in a, smaller cut‘ beingv taken by
the cutting edge.“ If ‘on the other hand, softer
ground is encountered. the front end of the
tongue 44 drops under the biasing action of the
spring ii to increase the-angle of attack of the
cutting edge and therefore increase the depth or,
the cut. Also as the bowl fills the drawbar pull
becomes greater‘and the adiusting screw )88 and
the connections between pivot plates 28 and piv- '
ot agms 38 may u so adj. that the cut
blade tilts further andfurther upwarduntil,
‘ when the bowl is full, the cutting blade is en-‘
out of the ground.
i. In a scraper, a bowl and‘ cutting edge on th
bowl, draft means including a yoke member and
relation with reference to the bowl, the draft "
means including a tongue extending forwardly
from the bowl, a. drawbar extending forwardly
beneath the tongue and in parallel relation there
to, a link plvotally attaching the rear end of the.
drawbar to the rear end or‘ tne tonguethe his;
being normally positioned to be inclined forwardly
from the drawbar to tongue, asecond and longer
link disposed forwardly of the ?rst named link.
and inclined in substantially the same, direction
as the first named link and inclined ‘in sub~
stahtially the same direction as "the ?rst
named link, whereby a load such as the load
of the scraper digging in earth draws the
tongue rearwardly to tilt the tongue with the
front higher than the rear on loading of the
bucket to thereby vary-the angle of incidence of,
It is tube
that mostpf the operating. the cutting edge, a spring pivotally‘attached to
of the machine, particularly those parts in . the forward end of ‘the tongue and tolthe front
int-of the bowl itself, are substantially en portion of the drawbar whereby upward move
tirely enclosed. By reference to Figure 2 it,is ‘ment of the front end of the tongue with refer
readily understood why this is important since ence to the drawbar is resisted"with increasing 55
1 these parts are
entirely covered by the force by the spring.
dirt being carried by the scraper‘ when it is in
5,111 a. scraper, a bowl, a. yoke pivotally at
:,- =11
It is apparent-that by my method of tilting the
. tached to the bowl, a cross member connecting
a the sides of the yoke ahead of the bowl, a trip ’
bowl only a relatively few ‘parts are needed and ' shaft within the crossmember protected thereby,
the dragof thescrapercanbe rcadilycontrolled
usting the <1=
nut '88. Furthermore,
the mrts required are simple- and of inexpensive
Although I have described a -
ment of my invention. it is, apparent that modi
tions thereof-be made by those sunesm
a tongue secured on the cross member and e'x- ,
tending forwardly therefrom, a trip lever-pass?
ing downwardly through the tongue and engaged
to‘the trip shaft, trip members on the outer ends
hi’v the trip shaft for engaging stops on the bowl,
a drawbar beneath the tongue,‘ a link pivotally
eng the drawbar and tongue at the rearof
the art.- -- Such modi?cations may be made wlth_ ' these members, a second and longer link forward
out‘ it ~-
, invention
t . from the spirit and-scope of the ‘hr of the ?rst named link and also pivotally con
set forth in the
as mylinvention: '
amended. claims.
_ i. In a scrapenya scraper structure. a tongue
a vtiltithe
necting the drawbar and tonsils.‘ wring means
connecting the forward end of the tongue to the
drawbar to resist upward movement thereof with
,tothes'craper structure and adapted to, in
vary the ‘angle of
force. the links being. arranged so that
the loadapplied to the-bowl as in dig
ging, the more the front end of the tongue is
tilted with reference to the drawbar to thereby
vary the angle of the incidence of the'cuttina
edge of the howl.“v
6. In a scraper, a rotatable bowl, a draft yoke
journaled thereon and including a forwardly ex
tending tongue,'releasable means for restraining
said bowl against rotation with respect to said
yoke, a drawbar, means comprising substantially
parallel differential links disposed adjacent the
front and rear ends of said tongue for connect
_ ing the latter to
said drawbar and adapted to
cause the tongue to tilt relative to the drawbar
when a forwardly acting force is applied to the
latter and thereby to vary the angle of incidence
of the cutting edge of the bowl, and resilient
means for resisting said tilting of the tongue rel
ative to the drawbar.
‘ - '7. A roll-over scraper comprising av rotatable
bowl, a draft yoke journaled thereon and includ
ing a forwardly extending tongue, a latch arm
to the drawbar when a forwardly acting force is
applied to the latter and thereby to vary the an
gle of incidence of the cutting edge of the bowl,
and resilient means for resisting said tilting of a
the tongue relative to the drawbar.‘
8. A_ roll-over scraper comprising a transversely
disposed rotatable bowl, a draft yoke including
a pair of beams ‘journaled on said bowl at oppo
site ends thereof, respectively, a transverse tubu
lar member extending between and ?xed to said. 10
beams, and a forwardly extending draft tongue
connected to said. beams, a trip shaft rotatably
disposed within said tubular member, a latch
' arm ?xed at each end of said trip shaft and ro
tatable therewith into engagement with stops at 15
opposite ends, respectively, of said‘ bowl to hold
the latter against rotation relative to said yoke
during scraping operation, a drawbar extending
generally parallel to said draft tongue, means
comprising fore and aft spaced substantially par 20
allel differential links for connecting said tongue
to said drawbar and adapted to cause the tongue
to tilt relative to thedrawbar when a forwardly
acting force is applied to the latter and thereby
the latter against rotation relative to said yoke‘ to vary the angle of incidence of the cutting edge 25
during scraping operation, a drawbar, means of the bowl, and resilient means for resisting said I
comprising substantially parallel differential links tilting of the tongue relative to the drawbar.
disposed adjacent the front and rear ends of said
tongue for connecting the latter to said drawbar
and adapted to cause the tongue to tilt relative
pivotally supported on said tongue and swingable
into engagement with a stop on said bowl to hold
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