close

Вход

Забыли?

вход по аккаунту

?

Патент USA US2406826

код для вставки
Sept. 3-, 1946.
H c. FRENCH ETAL
v2,406,826
S CRAPER
Filed Sept. 28, 1944
3 Sheets-Sheet 1
Sept. 3, 1946.
H. c. FRENCH ETAL
'
2,406,826
SCRAPER
‘
Filed Sept. 28, 1944
5 Sheets-Sheet 2
INVENTORJ
a
BY 77
mm a‘
V
9
Sept. 3, 1946-
H. c. FRENCH ETAL
2,406,826
SCRAPER
Filed sept 28, 1944
5 Sheets-Sheet 3
Patented Sept. 3, 1946
2,406,826
UNITED * STATES‘ PATENT
OFFICE '
2,406,826
SCRAPER.
Henry C. French, Elm Grove, and Norman V.
,Kuehlman, Milwaukee, Wis., assignors to The
Heil _Co., Milwaukee, Wis., a corporation of Wis
0011511!
Application September 28, 1944, Serial No. 556,113
14 Claims. (Cl. 37-—129)
1
2
This invention relates to improvements in
scrapers.
.
A general object of the invention is to provide
a. highly efficient, relatively inexpensive and
practical scraper arranged for front loading and
dumping, and wherein the ‘scraper mechanism
is operated by a simple andpositive mechanism,
to control and service, and is well adapted for
the purposes described.
With the above and other objects in view, the
invention consists of the improved scraper, and
its parts and combinations as set forth in the
claims, and all equivalents thereof.
In the accompanying drawings in which the
the scraper being operatively associated with a
same reference characters indicate the same
standard crawler tractor to which a portion of
parts in all of the views:
the scraper operating mechanism may be ex 10
Fig. 1 is a longitudinal vertical sectional view
tended.
through one form of the scraper, wherein the
A. further object of the invention is to provide 7
a simple, mechanically operated scraper, sus
ceptible of being readily serviced by the average
operating mechanism is cable actuated, showing
the parts in digging or scraping position;
Fig, 2 is a similar longitudinal vertical‘ sec
mechanic, and having an unrestricted open top 15 tional view through the same form of scraper,
permitting loading when desired, with a power
showing the parts in dumping or unloading po
shovel.
sition;
A further object of the invention is to provide
.
Fig. 3‘ is a plan view of said scraper in the
a scraper which is underslung in character with
condition shown in Fig. 2, with parts broken
a high front frame, being particularly adapted 20 away and in section;
for use in connection with high speed, rubber
tired tractors.
A further object of .the invention is to provide
a scraper having a novel mechanism for trans
Fig. 4 is a longitudinal vertical sectional view
through another form of scraper wherein‘ the
operating mechanism is hydraulically actuated,
the parts being in digging or scraping position;
mitting motion from an operating member to 25 and
the. controllable members of the scraper which
Fig. 5 is a schematic view of the hydraulic
includes an independently rotatable cross shaft
jacks, controls, and fluidsystem for the latter
to which motion is transmitted by a swinging
form of scraper.
arm, said rotatable cross shaft causing the front
The scraper of the present invention is ex
apron and bowl bottom to move in proper se 30 empli?ed as one wherein the forward end of“ the
quence for bowl loading and unloading.
A further object of the invention is to provide
scraper is adapted to be supported directly by
thereby eliminating the necessity for spring or
thus arranged, is relatively inexpensive, and
possesses great maneuverability.
a tractor. By this arrangement, the substantial
a scraper wherein the movable elements, includ
crawler mechanism of the tractor is brought into
ing- the apron and bowl ‘bottom, return to their
action to support a large portion of the weight
normal positions through the action of gravity, Cu‘' UT of- the scraper and its load. The scraper, as
latch means to hold said parts‘ in their down
positions.
.
A further object of the invention is to provide
Referring now more particularly to the form
of the invention shown in Figs. 1, 2 and 3 of the
a scraper having a simple, novel and effective 40 drawings, the improved cable-operated scraper
mechanism for operating the bowl bottom or
shown therein by way of illustration, comprises
floor and the apron, said‘ mechanism being
a sturdy open front frame ill of U-formation.
adapted for actuation either by a cable, or by
A connecting arm II is rigidly connected to the
a. hydraulic jack.
'
front transverse member of said frame I0, in
A further object. of the invention. is to provide
termediate its sides, and the same projects for
swingable front‘ apron, the arrangement‘ being
wardly’ and is downwardly curved to permit its
being universally movably engaged‘ with the draw
such that a common mechanism is utilized for
bar of a crawler tractor (not shown). As is con
operation of both, but that the’ sequence of op
eration of said floor and; apron is such that. the
ventional, the tractor has mounted on its rear
portion, a power control unit, and the drums
thereof are adapted to have wound and unwound
thereon operating‘ and control cables l2 and [3
whose arrangement will be described more fully
hereinafter;
Associated with‘ the front frame It and ex
a scraper having a tiltable bowl floor and a
apron may have: imparted thereto: a limited
movement Without any movement being‘ im
parted to the bowl- ?oor.
A further- object. of the. invention is to provide
a. scraper which is. strong; and; durable, is easy
2,406,826
3
4
tending rearwardly thereof is a bowl frame I4
which includes transverse box sections I5 and
I6 and a rear axle H, the bowl frame being
pivotal on the rear axle, and the rear axle carry
plate 23 of the rear wall is a hingedly mounted
ing wheels I8.
Bearing arms I9 extend rear
wardly from the bowl frame box section I5 and
have journalled therein a transverse shaft 20.
?apper plate 44 which is lifted to the position of
Fig. 2 to permit the necessary amount of move
ment of the arms 39.
When the push column is moved rearwardly.
it will carry with it in a reverse direction said
?oor-lifting arms 39, the same withdrawing
The rear ends of the upper longitudinal mem
through the front opening in the reduced portion
bers of the front frame II] have welded thereto
of the bowl frame and gravity permits the bowl
extension arms 2| engaging bearings on the outer 10 ?oor 24 to return to its lowered position, as in
ends of the cross shaft 20. It will thus be evi
Fig. 1, wherein its inner end portion rests on the
dent that the front of the scraper is supported
transverse box section member I 5 and extends
by a tractor, the rear of the scraper is supported
thereabove. The recession of the arms 39 per
by the wheels I 8 and the scraper frames II] and
mits the hinged rear wall flapper plate 44 to
I4 are so articulated that they may jack-knife 15 drop to a closing position, as in Fig. 1, and the
relative to each other.
hinged plate 25 carried by the inner or upper end
Within the bowl frame I4 a dirt-carrying bowl
' of the ?oor 24 overlaps the depending plate 44,
is de?ned by separated, rigidly mounted side
as in Fig. 1, and cooperates therewith and with
plates 22, a rear wall 23 (whose peculiar con
the ?xed plate 23 thereabove in providing a com
struction will be explained more fully), and a 20 plete closed rear wall for the bowl when the parts
are in digging or load-carrying positions.
movable bowl floor 24. Hingedly connected to
the lower edge of the floor 24 is a transverse cut
The scraper assembly also includes a load-con
?ning front apron 45 having integral opposite
ting blade 25, the blade being rigidly associated
with the bowl frame. The upper or inner edge
side arms 46 disposed between and swingably sus
of the bowl floor 24 has hingedly connected there
pended from the side walls 22 of the bowl by
means of alined pivot pins 41. The apron has
to a closure plate 25 which cooperates with the
its lower transverse cutoff edge 48 cooperable
rear wall in a manner to be hereinafter ex
with and swingable adjacent the cutting blade
plained. In the hinged connection for said plate
25 of the bowl ?oor whereby material may be
26 is a stop to prevent undesired forward move
ment of said plate beyond a limit.
30 confined within the space bounded by the bowl
As will appear from Fig. 3, the rear portion of
side walls 22, the bowl floor 24 and the bowl rear.
the bowl frame I4 is of less breadth than the
There are mounted fast on outer end portions
bowl forwardly thereof. Extended transversely
of the shaft 20 so as to turn therewith projecting
across the lower intermediate portion of the rear
levers 49. Clevises 50 are pivotally attached to
of the bowl frame is a beam 27 which supports the outer ends of these levers and the rear ends
an open housing 28. There is longitudinally
of ?exible connections 5! are a?ixed to said
movably associated with said housing a push col
clevises. The forward ends of the ?exible con
umn 29 carrying at its rear end a transverse
nections 5| carry clevises 52, which are pivotally
shaft 35 on the opposite ends of which pairs of
attached to intermediate portions of the side
sheaves 3I—-32 and 33-34 are revolubly mount 40 arms 46 of the apron 45.
The sheave and cable lacing arrangement for
ed. Forwardly of the column-carried sheaves
3I—32 and 33-34 are pairs of revoluble sheaves
the scraper will now be described. The cable I3
35-36 and 3‘I—38, the pairs being on opposite
is for the purpose of raising and lowering the en
tire bowl assembly. As was previously men
sides of the push column, alined with the rear
wardly disposed pairs of sheaves, and mounted
tioned, said cable extends forwardly to a winch
in the housing 28.
'
drum mounted on a tractor to which the scraper
A pair 'of complementary spaced apart arms
are indicated by the numerals 39. The upper
ends of said arms are mounted fast on interme
diate portions of the revoluble cross shaft 20.
The forward end portion of the push column 29
extends between intermediate portions of the
arms 39, and is pivotally connected thereto by a
cross-connecting pin 45. The forward or outer
ends of the arms 39 are connected by a shaft or
pin 4| on which is j ournalled a roller 42.
Between the lower forward edge portions of
the side plates of ‘the rear reduced portion of the
bowl frame I4 is an opening through which the
' arms 39 are adapted to be swung.
When it is
desired to raise the bowl ?oor 24, the push column
29 is projected forwardly, by means later-‘to be
described, and this causes a clockwise swinging
movement (relative to the drawings) of the arms
39 fast on the shaft 29, turning said shaft. The
arms are thereupon swung through the front
opening of the reduced portion of the bowl frame
and the arm-carried roller 42 then contacts a
track 43 on a rear surface portion of the bowl
?oor 24. Continued movement of said arms in
the direction described is effective to hingedly
move the ?oor toward a vertical position, as in
is coupled. From the winch drum, said cable I3
is extended rearwardly, engages under a vertical .
sheave 53 mounted on one side of the lower por
tion of the front frame connecting arm I I. From
the sheave 53, said cable I3 then passes over an
upper sheave 54, also carried by the front frame
connecting arm, and then the cable extends rear
wardly and about a sheave 55, which is revolubly
carried by a bracket 56 extending upwardly from
a transverse front upper'box frame section 51
integral with the front frame I0. Said bracket
56 also has revolubly mounted thereon alined up
per sheaves 58, 59, 60 and BI. Mounted on a
forward upper transverse box frame member 62
of the bowl frame is a bracket 63 which also
carries on a horizontal axis, a series of lower
alined sheaves 64, said lower sheaves correspond
ing in number to the upper sheaves 55 to SI, in
clusive. From the upper sheave 55, which is en
gaged by the cable I3, the cable is ?rst passed
downwardly about one of the lower sheaves 64,
and then it extends alternately upwardly and
downwardly, passing about all of the upper and
lower sheaves previously speci?ed. The result of
this arrangement is that when a forward pull
is imposed on the cable I3, a scissors or jack
knifing action will be imparted as between the
front frame I0 and the bowl frame, the latter
Fig. 2, for load dumping purposes, the ?oor hing
ing relative to the rigidly mounted cutting blade
25. Depending from the lower edge of the upper 75 pivoting on the wheel axle I1. Fig. 1 represents
acoaeao
the position of the. parts. when the bowl frame is
lowered, caused by a slackening" in the cable l3,
whereas. Fig. 2 represents the. condition resulting
6
Fig. 2.. To return the parts to normal position
from. a pull on the. cable 13,:which raises the. en
it is merely necessary to slacheuup on the cable
12.. whereupon the floor and front apron come
mence returning to their lowered positions to—
tire bowl assembly, and the pull on the cable.
causes the lower sheaves 64 to be drawn toward.
the upper front frame-carried sheaves 55-451..
gather. Toward, the lower end of its movement
the apron accelerates
dropping. It will be
noted that the ‘Weight of the front apronv is for
wardly of its. axis of pivotal movement and hence
While. the cable I3: is for the purpose of rais
gravity returns it to its down position when the
ing and lowering the entire. bowl, assembly, the
cable I2 is for ‘the purpose. of controlling, in 10 cable is: slack. The down movement of the. apron
imposes a ‘pull. on the ?exible connections 51
proper sequence, the. movements of the front
apron 4.5 and the bowl: ?oor 2.4. Said cable, 12,
extending rearwardly from the winch. drum, ex
which. through the levers 49, turns, the cross shaft
20. in a reverse direction and also swinging o1‘ rc~
tractipg the. arms 39-. This is effective to with-_
tends. under a vertical sheave 65. on the, front
frame arm III and then passes upwardly and over 15 draw or move the, push. column. 29 rearwardly.
Of: course as the arms 39: are withdrawn, the
an arm carried sheave 6.6. A horizontal sheave
support. for‘ the tilted floor 2.4 recedes and grav
61 on thefront transverse member of the front
ity causes: the floor ‘to drop‘ to its lowered position
frame then engages; the .cable and directs. it lat
Both the apron and the floor maintain their nor!
orally‘ to. a sheave E8; borne by a forward side
portion of the front frame. A. sheave 69 at the 20. mal; lowered positions through gravity. and no
springs or latches. are required for this purpose.
rear of the front frame, on the same side as
.As was previously suggested, after the scraper
the sheave 68. then. engages the cable and directs
has been loaded, and the load is to be transported.
it diagonallyrearwardly inwardly to a vertical,
the entire.- bowl assembly is elevated through a
angularly directed ‘sheave 10 mounted on the
, housing 28. The sheave 10 directs the cable to 25. pull imposed on thecable l3. 'I'OcOn?ne the load
prior to dumping; the cutoff edge 48, of, the apron
the sheave 35 whichin turn guides it rearwardly
engages the bowl ?oor bladeZii.
to sheave 3i. After extending about the latter
As will be observed .from Figure 3., the, scraper
sheave the cable then passes forwardly and about
is open on its top side, and there are no obstruc
sheave 36. and then rearwardly to sheave 32.
tions extended thereover. This adapts the
From the latter sheave the cable then extends
about an intermediate, housing-carried sheave - scraper to being loaded by a power shovel when
desired. It. will also be observed that the scraper
1| from ‘whence .it passes to the sheaves on the
is, underslung in character, and this, in addition
other side of the push column 29 including in
to. the high front. frame. particularly adapts. the
the order named, sheaves 33, 31, 34 and 38. The
cable is dead-ended after engaging the last 35 scraper for use with a. high speed rubber tired
mentioned sheave.
'
If it be assumed that the parts ‘are ?rst in ‘the
ractor. The main operating. cable H, in the
form of the invention described, is effective,
digging or loading position. of Fig. 1, from the
description of the cable arrangement given it
When pulled to exert an endthrust on the rear
per ends of said arms are mounted fast on the
revoluble cross shaft 20 said cross shaft will be
turned in a clockwise‘ direction (referring to. the
erage mechanic.
end of the. longitudinally movable push column,
should be obvious that a pull on the. cable is. ef-. 40 and this in turn. swings the floor contacting arms
39 and revolves the cross shaft 2!] which then
fective to exert an end thrust on the rear end
transmits a pullingfome t0. the apron through
of the push. column 2-9. which carries the cable
engaged sheaves iii-32 and 33-34,. This end
the connections described. The mechanical op
eration of. the scraper is very simple. resulting
thrust forces the push column forwardly also
in a relatively inexpensive mechanism which is
swinging forwardly the arms 39 which are ipivot~
susceptible of being readily serviced by an‘ av
ally connected'to the push column. As the up
drawings) and the levers 49 will. be swung rear
wardly. This action will impose a rearward pull
on the ?exible connections 5| to elevatethe apron
'
Fig, 4 illustrates the invention as applied to an
hydraulically operated scraper; As the scraper
proper is similar to that described in connection
with the principal iorm of the invention, the
description thereof will not be repeated, it being
observed that those elements in Fig. 4 bearing
i5. ultimately to .the full open, unloading position
of Fig. 2.
The arrangement of movable parts and se».
primedrefrerence numeralseorrespond to the parts
quence of operation is such that the initial pull
ence. numerals.
on the cable 12 will first cause the front apron
45 to be elevated at desired distance and this in
itial relatively short upward movement of the
apron is relatively rapid. A limited pull on and
release of the cable [2 may therefore be used to
control limited opening and, closing movement of
the apron independently of any movement of the
bowl ?oor. Following the initial limited move
ment of the apron, the roller ends of the arms 3.9
will contact and kick the bowl ?OOr 24, swing
ing the same from the down position of Fig; 1
toward the relatively upright dumping position
of Fig. .2. The initial movement of the bowl floor
is relatively slow and following deceleration of.
the upward movement of the apron. the move
ment of the floor toward its dumping position is
accelerated. As long as the cable l2 is maintained
in a taut wound condition by the tractor winch,
in Figs. 1 to 3, inclusive, bearing unprimed refer
‘
The scraper assemblage of Fig. 4, as in the
principal form of the invention, includes a revo
luble cross shaft 20’ having a pair of joined com
plementary spaced apart arms 39' mounted fast
at their upper ends on said cross shaft so as to
turn therewith. The roller equipped lower ends
of said arms are adapted to be swung through the
bowl rear opening into contact with the track 43'
on the bowl floor 24'.
The means for oscillating said arms comprise
an hydraulic jack 1'5 intermediately pivotally
mounted on a‘trunnion 16 within the housing 28‘.
The piston rod ‘H of the hydraulic jack‘extends
to and is pivotally connected with the arms‘ 39",
as at 18. Thus, the projection of the piston rod
‘ll of the hydraulic jack through the action of a
fluid forced ‘into the jack cylinder against the
work surface of the piston rod piston will swing
the parts will remain in the dumping position of 75 the arms 39' ‘in a clockwise direction relative to
2,406,826
7
8
Fig. 4, turning the cross shaft 20’. This cross
shaft carries angularly directed levers 49' from
duits for projecting or retracting the pistons in
the hydraulic jacks ‘l5 and 19. ‘As was explained,
operation of these hydraulic jacks is effective to
raise and lower the entire bowl assembly and to
which are extended cables 5|’ connecting with
the apron 48’. When turning movement is im
manipulate the front apron 46' and to tilt or lower
the bowl ?oor 24'.
From the foregoing description, it will be ap
parent that the improved scraper, whether cable
or hydraulically actuated, utilizes a revoluble cross
parted to the shaft 20’ in the proper direction,
through movement of the arms 38', the apron 46'
may be raised from a bowl closing position to a
loading position, as in Fig. 4. Due to the fact
that the arms 39' may have considerable move
ment before they engage and tilt the bowl floor 10 shaft to which motion is imparted by swingable
24', the limited opening and closing movement
may be imparted to the apron 46' through a lim
ited swinging movement of the arms independ
ently of any movement of the bowl floor 24'.
However, as in the principal form of the inven 15
arms, to control movement of the front apron
and likewise thecross shaft and arm assembly is
effective to raise and lower the bowl floor. The
improved scraper is of simple and novel construc
tion, is e?icient in operation, and is well adapted
tion when the arms 39' are oscillated forwardly,
for the purposes described.
there will ?rst be the independent raising of the
What is claimed as the invention is:
front apron 45’ a limited distance.
1. In a scraper, a front frame, a bowl frame
This initial
pivotally connected with the front frame and in
movement of the apron is relatively rapid. As
further movement is imparted to the arms 39' in 20 cluding a bowl structure open at its front end,
a wheeled support on which the bowl frame is
the same direction, the roller ends of the arms
pivotally mounted, said bowl structure including
will then contact and move the bowl floor 24'
a rigidly mounted forward earth cutting blade, a
swinging the same toward a relatively upright
movable bowl ?oor hingedly connected with said
dumping position, and this movement of the bowl
floor is accompanied by an additional elevation 25. blade, and an apron pivotally mounted relative
to the bowl structure and controlling the open
of the apron. As was pointed out, the initial
front end thereof, oscillatable means mounted on
movement of the apron is rapid, and when the
the bowl frame, and means for transmitting mo
arms come into contact with the bowl floor, the
tion from the oscillatable means to the apron to
initial movement of the bowl floor is relatively
move the same so as to expose the front end of
slow. However, continued upward movement of
the bowl structure, the oscillatable means being
the apron is decelerated while continued upward
spaced from but movable into engagement with
movement of the bowl ?oor is accelerated.
the bowl ?oor to tilt the latter to a dumping
In the hydraulically actuated arrangement
position.
shown in Fig. 4, there is another hydraulic jack
2. In a scraper, a front frame, a bowl frame
18 mounted relatively vertically on the front frame 35
pivotally connected with the front frame and in
member It’, the same being pivotally carried as
cluding a bowl structure open at its front end,
at 80 on frame brackets 8|. The piston rod 82
of said hydraulic jack depends and is pivotally
a wheeled support on which the bowl frame is
pivotally mounted, said bowl structure including
connected with brackets 83 mounted on the trans
verse box section 62’ on the forward portion of 40 a rigidly mounted forward earth cutting blade,
a movable bowl ?oor hingedly connected with said
the bowl frame. It will, therefore, be evident
blade, and an apron pivotally mounted relative to
that actuation of the hydraulic jack ‘[9 is effective
the bowl structure and controlling the open front
to cause jackkni?ng movements of the front frame
end thereof, oscillatable means mounted on the
and bowl frame relative to each other by which
bowl frame, and means for transmitting motion
means the entire bowl assembly may be raised or
from the oscillatable means to the apron to move
lowered.
Fig. 5 illustrates schematically the hydraulic
the same so as to expose the front end of the
jacks, controls and ?uid system for the form of
bowl structure, the oscillatable means being
the invention last described. An oil or hydraulic
spaced from but movable into engagement with
fluid supply tank is indicated therein by the nu
the bowl floor to tilt the latter to a dumping posi
meral 84. In actual practice this tank may be
tion following a predetermined limited movement
mounted on the tractor (not shown) with which
the scraper is connected for operation. Oil sup
ply lines or conduits 85 and 86 connect with dif
of the apron.
the conduit 85 being a return conduit. Included
in the other conduit and mounted wherever con
venient, preferably on the tractor, is a conven
tional oil pump 81. The other ends of the con
duits 85 and 85 enter and communicate with the 01 O
a wheeled support on which the bowl frame is
'
3. In a scraper, a front frame, a bowl frame
pivotally connected with the front frame and in
ferent portions of the supply tank or reservoir 84, Li GI cluding a bowl structure open at its front end,
chambers of a conventional two-way hydraulic
valve 88, the latter being preferably mounted on
the forward end of the scraper frame It)’ and
having control levers 89 which extend forwardly
so as to be accessible to the tractor operator.
From the valve member 88 are conduits 98 and 9|
which extend to and communicate with interior
portions of the casing of the jack 19 on opposite
sides of the jack piston 92. Also extended from
the valve 88 are conduits 93 and 94, which com
municate with different portions of the interior of
the jack casing 15 on opposite portions of the
pivotally mounted, said bowl structure including
a rigidly mounted forward earth cutting blade,
a movable bowl floor hingedly connected with said
blade, and an apron pivotally mounted relative
to the bowl structure and controlling the open
front end thereof, oscillatable means mounted on
the bowl frame and ultimately contactable with
the bowl floor for causing the same to tilt to a
“ dumping position, and a connection between the
oscillatable means and the apron immediately ef
fective upon movement of the oscillatable means
to transmit motion from the latter to the apron
to move the same so as to expose the front end
of the bowl structure.
4. In a scraper, a front frame, a bowl frame
pivotally connected with the front frame and in
cluding a bowl structure open at its front end,
piston 95 therein. Obviously, manipulation of the
control levers 89 is effective to control the flow
a wheeled support on which the bowl frame is
of oil under pressure through the various con
pivotally mounted, said bowl structure including
2,406,826
a rigidly mounted forward. earth cutting blade,
a movable bowl ?oor hingedly connected with said
blade, and an apron pivotally mounted relative to
the bowl ‘structure and controlling the open front
10
‘column reciprocatably movably mounted in the
frame, an arm swingably mounted relative to the
‘frame to ‘move into contact with the ‘bowl floor to
tilt and support the latter, said arm being en
end thereof, oscillatabl'e means mounted on the 5 gaged by the push column to ‘be impelled thereby,
bowl frame andhaving a portion movable toward
the bowl floor for causing the same to tilt ‘to a
dumping position when in contact therewith,
cable means applied to the push column to move
it in a direction to swing the arm into tilting and
supporting engagement with the bowl floor, and
means extending from the oscillatable means to
mechanical motion transmitting connections be
the apron ‘to transmit motion from the oscillat 10 tween the arm and the apron for causing the
able means to‘ the ‘apron to move the latter so as
apron to move to bowl opening position im
to expose the front "end of the bowl structure, and
"mediately'upon movement of the push column in
means under the control of a single operating
the stated direction.
member and extending to said oscillatable means
:9. In ascraper, a frame, a bowl structure in
for swinging said osclllatable‘ means in one direc v15 cluded in a portion of the frame and open at its
tion, said oscillatable means being so mounted
front end, means closing the rear end of the bowl
that gravity and the weight of the members oper
structure ‘including a movable gate, said bowl
structure including‘ a til-table bowl floor and a
forward earth cutting blade with which the floor
v5. In a scraper, a wheeled, articulated'support
is hingedly connected, an apron pivotally asso
in-g frame, a bowl structure included in a portion
ciated with the bowl structure and controlling the
of said supporting frame and open at its front
open front end thereof, a rigid reciprocatable
end, said bowl structure including a tiltable bowl
member movably mounted in the frame, an arm
floor and a rigidly mounted forward earth cutting
oscillatably mounted relative to the frame and
blade with'which said floor ‘is hingedly connected,
swingable in one direction to tilt and support the
an apron pivotally associated with the bowl struc 25 bowl ?oor, movement of the arm being accom
ture and controlling the open front end thereof,
modated by said, gate in the rear closure of the
an arm swingably mounted relative to the bowl
bowl structure, said arm being connected with
structure and contactable after a predetermined
the reciprocatable member to be impelled there
movement with the bowl floor to tilt and support
by, cable means applied to the reciprocatable
the latter, power means to swing said arm, and
member to move it in a direction to engage the
ated thereby will cause the same to move in the I
opposite direction.
-
motion transmitting means between the arm and
arm with the bowl floor, and mechanical con
the apron for moving the latter prior to and in
nections between the arm and the apron for caus
synchrony with movements of the bowl floor.
ing the apron to move to expose the front of the
6. In a scraper, a wheeled, articulated support
bowl structure immediately upon movement of
ing frame, a bowl structure included in a portion 35 the reciprocatable member in the stated direc
of said supporting frame and open at its front
tion.
end, ‘said bowl structure including a tiltable bowl
10. A scraper, comprising a transportable frame
?oor and a forward earth cutting blade with
having opposite side portions rigidly connected
which said floor is hingedly connected, an apron
at their upper ends by a ?xed rear wall section,
pivotally associated with the bowl structure and
there being an opening below said ?xed rear wall
controlling the open front end thereof, an arm
section, the lower portion of said rear wall sec
mounted on the bowl structure and swingable in
tion hingedly carrying a depending gate for a
one direction to ultimately tilt and support the
portion of said opening, a scraper blade inter
bowl floor, cable operated means associated with 45 posed between said side portions forwardly of
said arm to swing it in said direction, said arm
the rear Wall section, a relatively flat bottom plate
being caused to swing in a return direction by
hingedly supported adjacent said blade and hav
gravity, and motion transmitting means between
ing its rear portion swingable upwardly in prox
the arm and the apron for moving the latter
imity to said rear wall section and opening, the
when the arm is moved.
rear edge of said plate hingedly carrying an up
7. In a scraper, a frame, a bowl structure in
standing gate, the latter gate cooperating with
cluded in a portion of the frame and open at its
the
first-mentioned gate to close the opening be
front end, said bowl structure including a tiltable
low said rear wall section when the bottom plate
bowl floor and a forward earth cutting blade with
is in a lowered position, a swingable arm mounted
which said ?oor is hingedly connected, an apron
on the frame and movable into contact with said
pivotally associated with the bowl structure and
bottom plate to tilt and support it, said arm
controlling the open front end thereof, a rigid
moving through said opening and swinging the
reciprocatable member mounted in the frame, an
depending gate to open position with the bottom
arm swingably associated with the frame to move
into contact with the bowl ?oor to tilt and sup
plate carried gate moving away therefrom, and
port the latter, said arm being connected with the
means associated with said arm for swinging the
reciprocatable member to be impelled thereby,
cable means applied to the reciprocatable mem
ber to move it in a direction to engage the arm
with the bowl floor, and mechanical connections
between the arm and the apron for causing the
apron to move to bowl opening position immedi
ately upon movement of the reciprocatable mem
ber in the stated direction.
,
8. In a scraper, a frame, a bowl structure in
same.
11. A scraper, comprising a transportable
frame, an open bowl carried by the frame, a rela
CR tively flat bottom plate Within said bowl and
movable from a relatively flat lower position to
a forwardly inclined tilted position, an apron
pivotally mounted relative to the bowl and swing
able generally outwardly upwardly relative to the
bowl, and a unitary means movably mounted on
cluded in a portion of the frame and open at its
the frame and normally spaced from said bottom
front end, said bowl structure including a tiltable
plate and directly connected with said apron, said
bowl ?oor and a forward earth cutting blade with
means being operable to first swing said apron
which said floor is hingedly connected, an apron
and to subsequently engage the undersurface of
pivotally associated with the bowl structure and
controlling the open front end thereof, a push 75 said bottom plate to tilt the same, tilting move
2,406,826
11
12
ment of the bottom plate being accompanied by
wardly relative to the bowl, and hydraulically
further swinging movement of the apron.
12. A scraper, comprising a transportable
actuated means associated with the frame and
means movably mounted on the frame and
cluded in a portion of the frame and open at its
front end, said bowl structure including a tiltable
bowl ?oor and an apron pivotally associated with
the bowl structure and controlling the open front
normally spaced from said bottom plate and
directly connected with said apron, said means
frame, an open bowl carried by the frame, a rela
tively ?at bottom plate hingedly mounted with Cl being operable to ?rst swing said apron and to
subsequently engage the undersurface of said
in said bowl and movable from a relatively ?at
bottom plate to tilt the same, tilting movement
lower position to a forwardly inclined tilted posi
of the bottom plate being accompanied by further
tion, an apron pivotally mounted relative to the
swinging movement of the apron
bowl and swingable generally outwardly upwardly
14. In a scraper, a frame, a bowl structure in
relative to the bowl, and a single cable actuated 10
directly connected to the apron but normally
spaced from said bottom plate, said means being
operable to ?rst swing said apron and to subse
quently engage the undersurface ‘of said bottom
plate to tilt the same, tilting movement of the
end thereof, a cross shaft revolubly mounted on
the frame, an arm fast on said cross shaft and
swingable toward and away from the bowl ?oor
bottom plate being accompanied by further
and normally in a position away from the bowl
swinging movement of the apron.
floor, an hydraulic jack connected with said arm
13. A scraper, comprising a transportable
frame, an open bowl carried by the frame, a 20 to swing the same, and connections between the
cross shaft and the apron whereby turning move
relatively flat bottom plate movably mounted
ment of the cross shaft is immediately effective
within said bowl and shiftable from a relatively
to swing said apron relative to the bowl opening.
flat lower position to a forwardly inclined tilted
HENRY C. FRENCH.
position, an apron pivotally mounted relative to
NORMAN V. KUEHLMAN.
the bowl and swingable generally outwardly up
Документ
Категория
Без категории
Просмотров
0
Размер файла
1 191 Кб
Теги
1/--страниц
Пожаловаться на содержимое документа