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Патент USA US2131421

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Sept. 27, 1938.
2,131,421
w. J; ADAMS
)SGRAPER
Filed March v23, 1936
‘
INVENTOR.
W J.Ada,1n.s
.mm ‘
ATTORNEY
Patented Sept. 27, 1938
2,131,421
UNITED STATES
PATENT OFFICEl
2,131,421
scasraa
William Joseph Adams, Santa Cruz, 'oaua, as
signor to W. J. Adams, Inc., Stockton, Calif.,
a corporation
’ Application March 23, 1938, Serial No. ‘70,218 ~
6 Claims.
This invention relates to scrapers, and partic
rear end on a cross member 2 extending between
ularly to the scraper shown in my Patent No.
the frame‘ beams.
2,010,801, dated August 13, 1935.
The side plates 3 of the, main bowl terminate
in a plane adjacent the scraping blade 4 of said
This scraper includes main and auxiliary bowls,
5 the latter being mounted in front of and in con
nection with the main bowl in such a manner that
while the dirt supporting plate of the auxiliary
bowl is above and spaced from the main bowl
while the latter is digging, the adjacent ends of
10 the bottom plates of the bowls meet each other.
when the main bowl is raised to a carrying posi
tion.
In the previous scraper, the side plates of the
auxiliary bowl, while extending rearwardly some
15 distance from the rear edge of. the bottom plate
thereof to overlap the sides of themain bowl,
.
bowl. This avoids the wear on the forward por
tions of theside plates as when they extend for- '
wardly from the blade some distance and must
also dig into the ground, as is the case in some
scrapers.
. The auxiliary bowl A is also disposed between I,
the side frame beams, and is supported at its
forward end from side beams for combined swivel
and longitudinal movement relative thereto, by
rollers 5 riding-on the beam tracks T substantially
as in the previous device.
-
The side plates 3 of the main bowl B inter- '
break upwardly from said bottom'plate. 'An open
mediate their ends are provided with substan
space above ground was thus-formed ahead of the
tially' vertical rows of bolt holes 6, while the side _
main bowl between the overlapping plates. when
plates ‘I of the auxiliary bowl A are provided with
similar rows of holes 8. When the main bowl B "
and the auxiliary bowl A are in what may be
termed closed position, i. e. when the co-operating
20 working in light or sandy dirt this space allowed.
considerable dirt as pushed up by the- advancing
blade, to escape past the sides of the main bowl,
and the ei?ciency of operation in dirt of this
character was correspondingly lessened.
i
(0]. 37-429)
‘
It is therefore the object of this'invention to
overcome this defect by arranging the side plates
of the auxiliary bowl so that this dirt'eescape
space is practically eliminated, thus positively
con?ning all the dirt as scraped wltliinthe con
edges of these bowls lie in substantially contacting
relation, the rows of holes 8 are in register with
the adjacent rows of holes 8. A bolt l0, provided
for each side of the scraper, may be inserted in
corresponding pairs of holes-to pivotally connect
the overlapping plates together.
By moving these bolts ill from one set of holes
?nes of the side plates. -At the same time, the ' to the other, the extent of the forward movement
cost of construction of the scraper is increased of the inner edge of the apron relative to the cut
but little if any.
"
'
I have also provided an improved form of cut
ting blade for the scraper, which prevents adher
l ing of sticky dirt to the blade so that the; bowl
loads more easily and with less resistance when
working in dirt of that character, and by eliminat
ing the mound of dirt adhered to and built up
across the blade, aids in the ready-and complete
dumping of the load.
The above objects I accomplish by means of
such structure and relative arrangement of parts
as will fully appear by a perusal of the following
speci?cation and claims.
45
.The ?gure on the drawing is a sectional eleva
tion of my improved scraper, showing the aux
iliary bowl as set for operating in light dirt and
with the main bowl in a scraping position.
50
Referring now more particularly 'to the char
acters of reference on the-drawing, the scraper as
ting edge of the bowl when the latter is tilted to
scraping position, may be altered. When the
bolts iii are in the topmost holes, the forward
movement will‘be greatest and will be the least ,
when the bolts are in the lowermost holes and in
termediate movement may be had by placing the
bolts in the intermediate holes. The greatest for
ward position has been found preferable when
the scraper is operating in loose dry earth such 40
as dry sandy soils. When the bowls are disposed
in this relative position the inner edge of the bot
tom plate 9 of the auxiliary bowl A is consider
ably forward of the cutting edge of the main bowl
B and above the ground.
.
'
In the structure of the former patent this left
an objectionable opening between the bottom
edge of the side plates 1 and thesround inter
mediate the edges of the main and auxiliary
bowls. In scraping through loose dirt, therefore,
a considerable portion of the scraped dirt would
before comprises [a wheel supported frame which _ have the tendency to ?ow out of these openings
includes spaced side beams, one of which is shown instead of moving into the bowl. This materially
at I. The main bowl B is disposedbetween the lessened the eillclency of the scraper.
55 beams and is pivotally mounted at the bottom and
To overcome this latter objection, I therefore ‘
2
2,131,421
conceived of the projection of the lower edge
of the side, plates 1 rearwardly of the plate 9 on
herence of the column to the face of the blade
and has the tendency to break up the solidarity
of the column which then is further broken up
furthest apart, the lower edges of such plates 1 by its movement over the curved ridge l3. The
will extend substantially to the level of the column being thus broken up, the dirt tends to 5
ground as at II at the lowest point of overlap roll or flow into the bowl B more like loose earth
of the plates of the two bowls; said lower edges ' does. The ease of loading sticky dirt is thereby
being substantially parallel to the rear end por
increased, and the power necessary to load the
tions of the top edges of said plates.
scraper with such dirt is materially lessened.
10 ' In this manner, a closure with the ground and
From the foregoing description it will be read- 10
with the side plates 3 is provided immediately ily seen that I have produced such a device as
such a line that when the edges of the bowls are
ahead of the plates 3 and ‘blade 4; which prevents
substantially ful?lls the objects of the invention
the escape of the dirt outwardly of and past the 4 as set forth herein.
sides-of the main bowl as such dirt is crowded
; > up by the scraping action, as was previously the
case. If the auxiliary bowl is lowered at its front
end by adjustment of the supporting rollers 5,
the rear end of the bottom plate 9 will be close
to the ground, and said dirt enclosing function
I of the side plate extensions will be practically
unbroken from the plates 3 to the bottom plate 9.
Even if the bolts I 0 are set in the lowermost
While this speci?cation sets forth in detail
the present and preferred construction of the 15
device, still in practice such deviations from such
detail may be resorted to as do not form a de
parture from the spirit of the invention, as de
?ned by the appended claims.
Having thus described my invention what I 20
claim as néw and useful and desire to secure by '
Letters Patent is:
.
holes 6-8 thus bringing the edge of the bottom
9 closer to the edge of the scraper bowl when the
25 latter is in digging position, as shown by dotted
lines in the drawing, the side plate extensions
II will still be held from materially projecting
into the ground during the digging operation.
1. In a scraper, main and auxiliary bowls, the
latter being in front of the former, the main
bowl including side plates and a scraping blade 25
disposed adjacent the forward end of the side
This avoids extended wear on these extended
from and overlapping the side plates of the main
bowl outwardly thereof, and means connecting 30
the overlapping portions of the plates together
so that when the blade is in digging position below
'
edges.
plates and the auxiliary bowl comprising a bottom
plate and side plates projecting rearwardly there—
To facilitate the operation of the mechanism
arranged as above described, I have also relo
cated the apron supporting rollers 5 from points
near the forward end of the auxiliary bowl A, as
shown in the patent, to points substantially mid
way between the ends of such auxiliary bowl as
shown in the present drawing. This relocation
of these rollers constitutes a vital improvement
ground level the rear end of the bottom plate
is above ground level and’spaced in front of the
blade, the side plates of the auxiliary bowl being 35
over the previous structure in that it changes the
bowl from a point adjacent and below the rear
arc of the opening movement of the auxiliary
apron and causes it to have' a much faster open
ing and closing‘ action and to open much wider
relative to the scraping edge of the main bowl
when the latter is in scraping position, than-is
‘ ; the case when the rollers are located near the
' front end of the auxiliary bowl, as shown in the
patent.
-
-
The blade 4 is concavely curved, and is sup
ported ‘and bolted on the similarly curvedface
of a transversely extending cast shoe l2, which
forms the base supportfor such scraping blade.
This shoe or scraping blade support is disposed
under and extends ahead of the bottom plate of
the main bowl, being welded or otherwise rigidly
secured thereto.
The upper edge of the blade is spaced ahead
of the forward end of the bottom plate; the
shoe at the top, between the blade and plate,
being formed with a convex ridge l3 which ex
60 tends above the level of the bottom plate. The
forward side of the ridge merges into the forward
surface of the blade as shown, so as to provide a
smootlr surface for the movement of the dirt,
and to form an abutment for the upper edge of
65 the blade, relieving the holding bolts of the
blade of shearing strains.
.
When a scraper is cutting through sticky soil
the latter tends to move into the bowl in a solid
column-like formation. Where‘a ?at scraping
blade is used this sticky solid column tends to ad
here to the face of the blade and the bottom of
the bowl. This materially increases the power
necessary to force the column into the bowl.
With the blade curved however, as disclosed in
a ‘this application, such curvature prevents'the ad
arranged to then form a substantial closure with -.
the ground between the bottom plate of the
auxiliary. bowl and the side plates of the main
end of said bottom plate.
_
40
2. In a scraper, a tiltable main bowl, an auxil
iary bowl in front of the main bowl, said main
bowl including side plates and a scraper blade
disposed adjacent the forward end of the side
plates and the auxiliary bowl including a bottom 45
plate and side plates outwardly overlapping’ the ‘
side plates of the main bowl, means pivotally
connecting the overlapping side plates together
above the bottom thereof in position to cause the
rear'edge of the bottom plate to engage the blade 50
when the bowls. are in transporting position, and ,
means functioning with-the tilting of the main
bowl to a digging position with the blade below
ground level to cause the bottom plate to remain
above ground level in an advanced position rela- 55
tive to the blade; the side plates of the auxiliary
bowl being, formed to then extend rearwardly
from the bottom plate adjacent ground level
‘from a point adjacent and below the rear end of
said bottom plate and a sufficient distance to 60
overlap the side plates of the main bowl adjacent
ground level.
‘ 3. In a. scraper, a tiltable main bowl, an auxil
iary bowl in front of the main bowl, said main
bowl including side plates and a scraper blade 65
disposed ‘adjacent the forward end of the side
plates and the auxiliary bowl including a bottom
plate and side plates outwardly overlapping the
side plates of the main bowl, means pivotally
connecting the overlapping side ‘plates- together1 70
above the bottom thereof in position to cause the
rear edge of the bottom plate to engage the blade
when the bowls are in transporting position, and
means functioning with the tilting of the main
bowl to a digging position with the blade below 75
9,131,421
10
15
20
25
3
ground level to cause the bottom plate to remain ya. scraping blade disposed adjacent the forward
above ground level in an advanced position rela
ends of such side plates, the auxiliary bowl in
tive to the blade; the side plates of the auxiliary cluding a bottom plate the rear end of which is
bowl being formed so that the bottom edges there
disposed above and some distance in front of the
of are then disposed on a level below the rear blade when the latter is in scraping position, and
end of the bottom plate and extend adjacent side plates on- said auxiliary bowl pivotally
ground level from a point some distance ahead mounted to the side plates of the main bowl and
of said end of the bottom plate to a termination overlapping the same at substantially ground
rearwardly of the forward end of the side plates level when the main bowl is in scraping posi
of the main bowl.
tion and extending thence forwardly at substan 10
4. A scraper comprising tiltable main and aux-v tially said level to a point ahead of and belo
iliary bowls, the latter being disposed in front the rear end of the bottom plate.
_' ,
‘
of the former, the main bowl including side plates
- 6. A scraper comprising tiltable main and aux
and a scraping blade disposed adjacent the for
iliary bowls, the latter’being disposed in front of
ward ends of such side plates, the auxiliary bowl the former,’ the main bowl including side plates 15
including a bottom plate the rear end of which is and a scraping blade disposed adjacent the for
disposed‘ above and some distance in front of the ward ends of such side plates, the auxiliary bowl
blade when the latter is in scraping position, including a bottom plate the rear end of which
and side plates on the auxiliary bowl pivotally is disposed above and some distance in front of
mounted on the side plates of the main bowl the blade when the latter is in scraping position, 20
and overlapping the outside of the same at sub
and side plates on the auxiliary bowl overlapping
stantially ground level when the main bowl is in the outside of the side plates of the main bowl
scraping position and extending thence forward- , at substantially ground level when the main bowl
ly at substantially said level to a point ahead is in scraping position and extending thence for
of and below the rear end of the bottom plate.
wardly at substantiallyv said level to a point ahead 25
5. A scraper comprising main and auxiliary of and below the rear end of the bottom plate.
bowls, the latter being disposed in front of the
former, the main bowl including side plates and
WILLIAM JOSEPH ADAMS.
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