вход по аккаунту


Патент USA US2112288

код для вставки
March 29, 1938.
J, P, HElL» i
Filed OOÍH‘ 24, 1936
Patented- Mar. 29, 1938
Julius P. Heil, Whiteiish Bay, Wis., assignor to
The Heil Co., Milwaukee, Wis., a corporation of
Application October 24,1936, Serial No. 107,380
9 Claims. (Cl. 37-124)
My present invention relates generally to im
provements in the construction and operation of
scrapers for grading and for transporting batches
of dirt, and4 relates more particularly to improve
ments in the details of v construction of dirt
handling machines of the general type' forming
the subject of Patent No. 2,095,759.
Generally defined, an object of my invention
is to provide an improved scraper assembly which
10 is adapted to eiiiciently handle`v dirt of various
kinds under the severest conditions, without the
use of excessive effort and without. danger of
damaging the machine.
In the prior Patent No. 2,095,759, above referred
15 to, there is shown a road scraper comprising a
main dirt carrying bowl mounted for transporta
tion along the ground and having a front cutter
the elements by intervening stones, stumps or
other abnormal objects.
Still another speciñc object of the invention is
to provide simple, compact and durable means for
eiïecting rapid and most eiiicient loading and un- 5
loading of a scraper type of dirtl carrying unit.v
These and other speciiic objects and advan
tages will be apparent from the following detailed
description; and it is to be noted that some of the
improved features of scraper assembly shown and `10
described but not claimed herein, form the sub
'ject of the co-pending application herein-above
referred to.
A clear conception of the improved details of
construction constituting the present invention, l5
and of the mode of constructing and of operating
Scrapers built in accordance with this improve
adapted to be lowered into'~ the ,earth for scraping - ment, may be had by referring tothe drawing ac
purposes, and front and rear, aprons swingably companying and forming a part of this specifica
20 suspended for cooperationv with the cutter and tion wherein like reference characters designate'r 20
with the bowl bottom, respectively,_for loading
and unloading purposes. While this prior scraper
operates most effectively whenhandling ordinary
dirt, it has been foundrthat wetv clay and other
sticky soil tends to adhere to the bowl bottom and
obstructs rapid unloading of the contents by the
rear apron. It has also been discovered that
large rocks or other obstructions located in the
path of the cutter, prevent the -latter _from being
30 elevated so as to permit simultaneous tight
closure of the front apron in order to confine the
load, without subjecting thelower edge of the
front apron to severe shock` and possible damage.
While these unusual conditions of operation are
35 not of frequent occurrence, they may arise at any
time and are not only annoying tothe operator
butmay also cause loss of time due to necessary
It is therefore a more speciñc object of my
present invention to provide improvements in
the construction of the dirt conñning apron or
v aprons of Scrapers of the above described‘type,
the same or similar parts in the several views.
Fig. 1 is a somewhat diagrammatic. central
longitudinal vertical section through a scraper,
showing the assemblage in load confining and
transporting condition; and ,
Fig. 2 is a similar view of the scraper assembly, 25
showing the elements thereof in unloading con
While the invention‘is shown herein as beingapplied to a speciñc type of scraper assemblage, 30
is not
to the
details of con
struction may be more generally applicable. y
The scraper assembly shown in the drawing by
way of illustration, comprises in general a main 35
load receiving and confining bucket or bowl 5 sup
ported to swing about'a rear axle Ii and having
a front cutter 'I movable Atoward and away from '
the ground; a frame 8 normally .supported f to
swing about a front `pivot or fulcrum 9 and hav-- 40
ing rearwardly extending‘laterally s_l‘nacedvsid‘e.` Q
arms l0, the medial portionsof which’ are swing-3 '
whereby these aprons will function most eiïec
walls ItoI ofthe
the forward‘upper
bowl Eby means
tively under all conditions of operation.
Another specific object of mypresent invention - pivot pins I2; a front load conñning `and k,cai‘ryf 45
is the provision of an improved unloading apron ing apron I3 swingably'suspended vfrom thej'pinsf
assemblage* which is effectively cooperable with
the bottomofthe load retaining bowl of a scraper,
to V-reïr‘nove‘ all deposits therefromv during the un
iO loadingoperation.v
A n A'ïfurtheri‘specific object oi' this invention is the
l*provision of an improved loading or load confin
ing apron assemblage which cooperates with the
cutter ‘of the scraper to permit effective conñne~
äw/ment of the charge without danger of damaging
I2 and movable towardyand awayV from the ._cut'te'r'fy ' " ’
'I and having opposite side walls I4 slidably cof”
5; awith
adjacent sidewalls
`"pusher 'II
or 'of
the §50
I5v swingably suspended 'from' thel opposite îsifd/
walls H of the bowlfs'by means oraüneapwot
pins inI6^and
close having
t'o ¿the'curved‘bottom`
end 'movable along
of the bowl 5; a plurality rif-hydraulicjacks` "I il, I9, ”' 55
20 for independently actuating the bowl 5, apron
I3 and apron I5 respectively; and rear and front
wheels 2l, 22 for movably supporting the axle 6
and. the fulcrum 9 respectively.
The main bowl 5 is preferably formed of heavy
manipulated to move the rear apron I5 toward
the rear end of the bowl bottom I1 as shown in
Fig. 1. With the scraperelements thus'disposed,
metal plates welded or otherwise rigidly united,
and the bottom I1 is curved to substantially con
form with an arc generated about the axis of the
advancement of the mechanism along the ground
will cause the cutter 1 to shear the dirt which will
then advance rearwardly over the bowl bottom I1
and toward the rear apron I5, thus filling the
bowl 5 with earth.
When a suitable charge of
pins I6 which swingably support the rear apron dirt has been admitted to the bowl, the set of 10
I5. The apron I5 which- is adapted to be swung 'jacks I8 may be operated to elevate the cutter _1
from the ground, and the jack I9 may be
back and forth between the parallel side walls II away
operated to lower the front apron
of the bowl 5 .by the hydraulic jack 20, has a I3 to the position shown in Fig. 1, thereby caus
scraper Viìap 23 pivotally suspended from its ing the flap 21 to engage the upper portion of
lower end; and this flap 23 which maybe com
the cutter 1 and thus coniìning the load within 15
15 posed of one or more adjoining sections, spans the bowl 5 and within the apron I3. 'I'he con
the bowl 5 and is adapted to ride along the upper fined load may then be transported over the
surface ofthe bowl bottom I1 whenever the apron ground and may be subsequently dumped or un
I5 is moved. The bowl 5 is adapted to be raised loaded by manipulatingthe jacks I9 and 20 to
or lowered by means of two similar and simul
taneously operable hydraulic jacks I8, the cylin
ders of which are carried byrigid rearwardly ex
tending iframev members 24 formed integral with
the bowl 5, and themembers 24 are swingably
associated with 4the-rear axle 6 and also support
25 the rear apron actuating jack 20.
As shown, the
rear frame members 24 are rigidly attached to a
sti'if` transverse `beam¥25 which interconnects the
upper,` rear portions of the side walls II, and are
also likewise attached tothe lower rear portion
30 of theA bowl 5 near "the, rear end of the bottom I1.
' The piston rods of the jacks 'I8 arel attached to
raise the front apron I3 and to move the rear 20
apron I 5 along the interior of the bowl 5. As the
rear apron I5 moves along the interior of the bowl '
5, the flap 23 at the lower end of this apron will
advance along the bowl bottom I1 and will thus
effectively remove all of the dirt from within the 25
bowl. In this manner, the scraper may be quick
ly loaded and unloaded, and removal of all of the
charge is assured by the flap 23.
If, during final loading of the scraper, the front
apron I3 meets an obstruction such as a stone, 30
stump or the like, the flap 21 may swing about its
pivot and away from the stop 28, and will ride
another cross-'beam'26which rigidly intercon
nects the rear upper ends" of the main frame over the top of the obstruction. The apron I3
may thus be lowered to its extreme position, and
arms III), and the beams 25, 25 are preferably dis- , as the cutter 1 is raised to a position above the 35
posed- rearwardly of the top >of vthe bowl 5 so as
' to‘avoid obstruction to loading of the bowl with a
steaml'shovel or the like.’4
v heffrontapronfIS and its side walls I4 are
also formed of heavy metal plate, and -a lower
edgev of thisiapron which coacts with the cutter 1,
40 v may> be_`provided with a pivotally suspended clo
surefflap _2,1 >whichfjisvnorm'ally4k adapted to con
tact with 'the' _cutter v1I as shown in Fig. 1. The
ñap2'ljis prevented fromf'swi’nging outwardly to
a position beyond tangen'cywith the apron I3,
by as_top 28, and this ñap may likewise be formed
of'one o_rrmore adjoiningfsections _and spans the
obstruction, the flap 21 will be brought to sealing
position by the charge confined within the scrap
er bowl 5 and within the front apron I3. It will
therefore be apparent that the flap 21 associated
with the front apron -I3 permits tight closing of 40
the load carrying elements, without subjecting
the'apron I3 to undesirable stresses and possible
breakage. -
From the foregoing description it will be- ap
parent that the present improvement comprising
the flaps 23, 21, will permit effective use of the
scraperl assemblage even when the soil is sticky
apron I3`.` As vshown in dash lines in Fig. 2, the and contains abnormal obstructions ` such .as
kfront .apron flap 2]..may lswing inwardly of the .rocks` and stumps. The ñap 23 associated with
apron I5 has been- found extremely effec
apron.. I3_lafnd`.away,`f?om,the stop 28 when the the rear
in removing wet clay and other sticky sub
apron Í.I3 Í is lowered. andthe flap engages an ob tive
stances from within the bowl 5 during unloading
struction which'l cannot be severed by this flap. of the scraper, and also prevents the charge from
The front apron-` I3 ¿may `be swung about its sus
backing up into the space'at the rear of the apron
pension_.»pins_l¿2. by .thehydraulic- jack I9 which¿¿supportedA upon‘the .cross-beam 25. and coacts
with theapron sidewalls _» Ilthrough linkage 29.
,During-_A normal, operation of the improved
scraper, the4 unit is being drawn along the ground
byjaïtractorf-attached to thedrawbar associated
60 t. with vfthe,
_front `fulcrurn y9,. andl the hydraulic jacks
I8,’«I9,‘20 are controllable by means of valve and
pump-.mechanisms .of -well knownl construction
mountedyupon Y the,` tractor. near the driver’s seat.
The `jacks =I8, f I9, 20 .mayjbej independently and
.selectivelya-actuated»y.=at .-the: will of the operator,
andwhen the fset- of . jacks l I 8l is: operated, the bowl
5-twillilbeiswung about‘îthelrear axle 6 land the
main frame 8 willf‘be‘» simultaneously swung about
theífrontßfulc'rum Svthus raising or lowering the
pivotfpins~l2 »andf causing -the cutter 1 to move up
or'down.. relativey to the ground`.-- When .the cutter
'I vis lowered into the ground, the hydraulic jack
I9-should bemanipulated tomove the front apron
I3 upwardly away from the bowl 5 as shown in
„Fig.,2.i and thehydraulic jack 20 should-also be
l5. The flap 21 associated with the front apron 55
I3 will. obviously _function `to protect this apron
against damage, and will also' maintain a
thorough seal .between the apron I3 and the front
of the bowl 5 when these elements have been
Araised away from the ground. The flaps 23, 21
performjtheir function automatically, and be
sides being extremely simple in construction,
these flaps may be readily replaced in case they
become twisted 'or broken.
It should be understood that it is vnot desired
to limit the present invention to the exact details
of construction and to _the -precise mode of use .
herein shown and described, for various modi- -
ilcations within the scopeV of the claims may oc
cur to persons skilled in the art.
1~. In a scraper, a bowl having _a frontl cutter
and a laterally straight but longitudinally curved
bottom, an apron swingable within said bowl
toward and away from said cutter, and a rigid 75
rectilineal flap pivotally suspended from the lower
end of said apron and having a straight knife
edge engageable only with said bottom during
swinging of said apron.
2. In a scraper, a bowl having a laterally
straight but longitudinally curved bottom and a
cutter secured to the front of said bottom beneath
the load supporting 'surface thereof, an apron
swìngable within said bowl toward and away
10 from said cutter, and a rigid rectilineal ñap piv
otally suspended from said apron and having a
therein toward and away from said cutter, said
rear apron having a pivoted iiap at its lower end
provided with a rectilineal knife edge engageable
with said bottom, a front apron pivotally sus
pended from said bowl and movable toward and
away from said cutter, and a pivoted flap asso
ciated with the lower end of said front apron
and movable upwardly and downwardly with re
spect to said cutter, said front apron iiap having
a limit stop disposed externally of said aprons 10
and bowl.
straight knife edge constantly engaging said bot
8. In a scraper, a bowl having a laterally
tom in advance of said apron during movement s straight bottom and a cutter at the forward end
of the latter toward said cutter.
thereof, a rear apron movably suspended from
3. In a scraper, a bowl having a front cutter, said bowl to advance therein over said bottom
an apron movable relative to said cutter to con
toward and away from said cutter, a rigid ñap
fine a load within said bowl, a ñap pivotally sus
pivotally suspended from the lower end of said
pended from said apron and being freely swing
rear apron and having a rectilineal knife edge
able toward and away from said cutter, and a
stop for said ñap disposed externally of said
'apron and bowl.
4. In a scraper, a bowl having a front cutter,
an apron pivotally suspended to swing toward
and away from said cutter, al rigid flap pivotally
engageable with said bottom during forward
movement of said apron toward said cutter, a 20
front load confining apron pivotally suspended
from said bowl and swingable toward and away
from said cutter, and a rigid ñap pivotally sus
25 suspended from the lower end of said apron to
pended from the lower end of said front apron
swing freely toward and away from the bottom
of said bowl, and a vstop for said iiap disposed
externally of said apron.
wardly with respect to said cutter when said
front apron is in` lowermost position, said front
5. In a scraper, a bowl having a front scraper,
30 a front dirt conñning' apron pivotally suspended
and being freely swingable upwardly and down
apron flap having a limit stop disposed externally
of said aprons and bowl.
9. In a scraper, a bowl having spaced parallel 80
from said bowl to swing toward said cutter, and flat side walls and a laterally rectilineal relatively
a rigid iiap pivotally suspended from the lower » wide bottom rigidly attached at its opposite sides
end oi' said apron and swingable toward and away to said walls, said bowl being constantly open at
from said cutter, said iiap being swingable only its rearend near said bottom, a cutter secured
35 Within the conñnes of said apron and having a
to the front of said bowl, a rear apron supported
limit stop disposed externally of th/e apron.
6. In a scraper, a bowl having a cutter, a pair
of aprons movable relative to said .bowl and co
operable with the latter to confine material there
40 in, and a ñap pivotally suspended from the lower
from said bowl and being movable toward- said
cutter between said _side walls, means operable
through the lower portion of said open bowl end
and coacting- -with -the lower rear portion of said
apron for moving the same, and a rigid flap piv 40
portion of each of said aprons, both of said ñaps otally suspended from the lowermost portion of
being swingable toward and away from said cutter Asaid apron and having a rectilineal scraping
and each other.
edge engageable only with said bottom during
7. In a scraper, a bowl having a bottom and a said movement of the apron.
45 cutter at the forward end thereof, a rear apron
pivotally suspended from said bowl and movable
JULrUs P. Een..
Без категории
Размер файла
528 Кб
Пожаловаться на содержимое документа