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Патент USA US3038278

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June 12,1962
c'. VlVlER
Filed Aug. 2, 1960
5 Sheets-Sheet 1
June 12, 1962
c. VlVlER
Filed Aug. 2, 1960
5 Sheets-Sheet 2
- June 12, 1962
c. VlVlER
Filed Aug. 2, 1960
5_ Sheets-Sheet 3
June 12, 1962
c, v|v|ER
Filed Aug. 2, 1960
5 Sheets-Sheet 4
June 12, 1962
c. VlVlER
Filed Aug. 2, 1960
5 Sheets-Sheet 5
United States Patent 0
Claude Vivier, Paris, France, assignor, by mesne assign
ments, to Richier, S.A., Paris, France
Filed Aug. 2, 1960, Ser. No. 46,976
Claims priority, application France Aug. 5, 1959
4 Claims. (Cl. 37-156)
Patented June 12, 1962
arranged in the manner broadly set forth hereinabove for
operatively connecting the blade carrier with the frame
of the grader, it is possible to have the blade settings
perfectly adapted to all kinds of works for which the
grader may be employed on the site.
Each one of the three blade setting motions, that is,
the two lift motions and the shift motion, is performed
by the operator by means of ‘a single control lever of which
'The present invention relates to machinery for public
handle controlling the distribution of compressed ?uid
works and more particularly to improvements in graders 10
in one or the opposite direction to the corresponding
with a view to increase their e?iciency and range of pos
cylinder, is provided with a trigger ‘for controlling by
sibilities, and simplify their operation,
of compressed air the release of the locking pin
In all graders of the many types proposed up to now
when it is desired to change its position on the connecting
the assembly of means ‘for positioning and setting the
quadrant and therefore to position this pin into another
‘blade consist broadly to two blade lift members and one 15 hole
of the quadrant.
blade shift member, which are responsive to mechanical
With the foregoing and other objects in view, the in
or hydraulic control means.
‘In the case of mechanical controls the three members
are independent of one another, but the extent through
which each of them can be moved makes it necessary, for
e?ecting all the works for which a grader is usually em
ployed, to connect them with the blade carrier through
rods of which the length must be changed by the operator
at the expenses of a considerable and frequent loss of
vention resides in the novel arrangement and combina
tion of parts and in the details of construction hereinafter
described and claimed, it being understood that changes in
the precise embodiment of the invention herein disclosed
may be made within the scope of what is claimed without
departing from the spirit of the invention.
Other objects and advantages will become apparent
the following description taken in conjunction with
time; besides, ‘with this conventional arrangement the 25 the accompanying
drawings in which:
operator cannot set the blade in all the desired positions
FIGURE 1 is a perspective diagrammatic view show
without leaving his seat.
In the case of hydraulic controls the same incon
veniences may be observed, whether the control motion
is obtained by using rotary hydraulic motors, or by using
hydraulic cylinders, when the rods of these cylinders are
not pivoted directly on the blade carrier.
In the case of a hydraulic control system using cylin
ders pivoted directly on the blade carrier the angular
ing for an observer looking towards the front of the grader
the essential structure of the device.
FIGURES 2 and 3 are views from the rear wherein, for
the sake of clarity, some members have been removed,
these ?gures showing two different positions of the con
trol assembly which correspond to two different mount
ings respectively.
FIGURE 4 shows one form of embodiment of each
movements of the assembly should in most cases be limit 35
hydraulic and pneumatic control lever whereby the
ed by the use of mechanical stop buffers or safety mem
operator may actuate single-handed, vfor each of the three
bers of which the operation is always more or less reliable
on public work machinery.
systems, the hydraulic cylinder and its locking device; and
FIGURE 5 illustrates in a manner similar to \FIG. 1 a
If these safety devices are to be dispensed with it is no
more possible to contemplate variable positions for the 40 positioning device according to this invention with a
modi?ed arrangement for controlling the blade lift mo
points of attachment of the hydraulic cylinders in rela
tion to the ‘frame of the grader ‘and this type of simpli?ed
FIGURE 6 illustrates on a larger scale a detail of the
mounting makes it impossible to set the blade in any
arrangement of FIG. 1.
desired position.
The blade A of the grader, as well as its mechanisms
Moreover, in order to provide certain particularly use
ful blade positions there are frequently provided systems 45 or members for rotating, shifting and ‘adjusting the cutting
angle of the blade is supported by a beam B for example
opera-‘Lively connecting completely or partially either the
of T-shape, which in the construction described herein
two lift systems and the shift system, or simply two of
supports the blade circle provided in all types of graders
them. As a rule, even these connections are not su?i
and consisting in general of a circular member designated
cient for dispensing with the use of safety devices.
schematically by the letter U in the drawings, although
Moreover, the adjustment of the blade during the ‘forma
this speci?c shape is not the only possible one. This
tion of banks requires in most cases from the operator
beam B is pivoted at the ‘front end of the frame by means
a simultaneous actuation of one of the lift members, on
of a universal or ball-and-socket joint R and comprises
the one hand, and of the shift member, on the other hand.
two groups of universal or ball-and-socket joints R1—R2
It is the essential object of the device of this invention
to permit without limitation all the blade settings neces 55 and R3-R4 disposed symmetrically on either side of the
longitudinal vaxis (1-1) of the beam B. The ball-and
sary for the proper operation of a grader by using hy
socket or universal joints R1, R2. and R are so‘ disposed
draulic control means in the form of cylinders mounted
that their centres are located on a common axis (2—2).
on three systems independent of one another, without
The other joints R3, R4: and R are also so disposed that
necessitating the use either of additional safety members
centres lie on the same axis (3-3). Besides, this
limiting the movements of these members, or of power 60 their
arrangement derives logically ‘from the condition of sym
or drive means except the hydraulic cylinders themselves,
metry'of joints R1-—-RZ in relation to joints R3-—R4.
the locking devices therefor being controlled on the same
The joints R2 and R4 are sic-called lift joints and both
levers as those actuating the distributors of the hydraulic
are normally used for operating the device.
Of ‘the two universal joints Rl-R3, only one is actually
This grader blade setting device is characterized in that 65
necessary for operating the device, but the provision of
each of the aforesaid rods is actuated by means of a hy
two universal joints on each side affords two different
draulic cylinder in a manner adjustable by means of a
mountings of the connecting bar (consisting of two rela
locking pin resiliently urged to its position of engagement
tively sliding members C ‘and M) which may be pivoted
in one of a row of holes forming a circular are on a con
necting quadrant.
70 at will either on joint R1 or on joint R3, to‘ permit the
accomplishment of special works if necessary. This bar
With the three systems independent of one another and
has a preferred position permitting for example the most
formed. With this complete arrangement it is possible to
current works to be performed on the right-hand side
when looking at FIG. 2. Each lift device comprises a
hydraulic cylinder D pivoted by means of a universal joint
move the arm E2 through an angle of 180° and more by
The movable arms E are rotatable about axes X—X'
using a cylinder D1 effecting only a very short stroke which,
to keep the driving efforts within reasonable limits, moves
the quadrant H1 only through angles of the order of 45°.
The sliding rods V may be of variable length and provided
and Y-Y’ respectively, these axes being parallel with
each other and disposed in the longitudinal direction of
the grader. They are locked against motion by means of
or otherwise. The function of these locking pins is not
essential and they may even be dispensed with. How
F on the movable arm E. The rods of cylinders D are
pivoted on the ball-and-socket joints R2 and R4 of beam
locking pins G extending through quadrants H rigid with
with locking pins controlled mechanically, pneumatically
the main frame of the grader and formed with ‘a number
ever, they are provided for operating special blades in
out-of-common positions.
This arrangement illustrated in FIGURE 5 consists es
of holes corresponding to the different desired angular
settings of the movable arms E. As shown in FIG. 6,
sentially in providing an indirect mounting of the lift
cylinders which, while a?ording a substantial reduction in
which is a section taken on a larger scale along the axis
vertical dimension of the grader, makes it possible
of pin G at right angles to the arm E, this pin G carries
to dispose these lift cylinders at locations safely spaced
a piston 20 slidably mounted in a cylinder 21 and urged
from any moving members. Therefore, it constitutes a
by a spring 22 to its locking position shown in the ?g
substantial improvement over the arrangement shown in
ure so as to engage one hole of quadrant H. By de
FIG. 1 wherein the lift cylinders are in a substantially
livering compressed air through a line 23 the piston 20
vertical position.
can be moved against the resistance of spring 22 to re
The shift device, both in the form shown in FIG. 1 and
lease the pin G from the hole of quadrant H. The
supply of compressed air to the two lines 23 is con
trolled directly from the driver’s seat by means of control
triggers mounted on the levers controlling the distributors
of the hydraulic cylinders D of the two lift devices. 25
With this arrangement it is possible for the operator of
the grader to control single-handed from his seat on the
one hand one of the hydraulic cylinders D and on the
other hand the locking pin G, so as to move one of the
movable arms E about its axis of rotation by using the
action of the relevant hydraulic cylinder D, while acting
upon the locking pin which may be held in a retracted
or quadrant-releasing position. After the working these
pins G are normally urged to their locking position by
in that shown in FIG. 5, consists of a shaft J located in a
plane parallel or not with the longitudinal axis of the
grader and carried by two bearings K and K1. The front
end of this shaft J is provided with a lever L carrying a
ball-and-socket or universal joint R5. The ball-and
socket or universal joints R5 and R1, or R5 and R3 are
interconnected by a rod M in which a number of holes
are formed, this rod M sliding in a socket C provided
with a transverse pin N for locking the joints R5 and R1
or R5 and R3 at the desired relative spacing. The
shape of this socket C is such as to permit the mounting
of the rod M so that the latter be longer than the dis
rtance R1 to R5 or R3 to R5. It is not compulsory to
this pin N from the operator’s seat as in the case
- the springs 22 so as to avoid any loss of time when locking
the movable arms E on the quadrants H.
A sliding rod I located in the transverse plane of move
ment of the two movable arms B may ‘also limit the
angular excursion of these arms to avoid any faulty oper
ation and notably compel the aperator to actuate at cer
tain moments a movable arm E before the other so as to
of the pins G of the lift mechanisms, but it would not
constitute a departure from the present invention to
provide a similar pneumatic control device for actuating
the pin N. Thus, notably, the corresponding control
40 movement may be obtained by actuating the lever con
trolling the distributor of the hydraulic shift cylinder,
as will be explained presently. However, as the modi
?cation of the length of rod M with respect to C is not
frequently required on a grader provided with the sys
or the movable arms E by operating the cylinders D and
retracting the pin G may be performed simultaneously or 45 tem described herein by way of example, the pneumatic
actuation of the pin N is not absolutely necessary in this
independently on each lift device without resorting to any
permanent or releasable mechanical connection between
At its rear end the shaft J has mounted in axial align
the two systems. This possibility of simultaneous or sepa
ment therewith a free-rotating cranked lever 0 adapted
rate operation is also applicable, according to the pres
to receive on the one hand a trunnion connecting it with
ent invention, to the shifting device to be described
the body of a “shift” hydraulic cylinder P and on the
avoid any loss of time during the control movements.
The operations consisting in actuating the cylinders D
other hand a pin Q pushed by a spring in one of the
holes formed in a quadrant S rigid with the shaft J.
This pin Q is similar to the pins G of the lift devices and
tial object of this arrangement being to limit the vertical
likewise be released by pneumatic means from the
over-all dimensions of the grader according to FIG. ‘1, 55 may
operator’s seat by means of a trigger controlling the
due to the relatively long lift cylinders disposed in a sub
FIG. 5 shows a modi?ed embodiment of the arrange
ment for controlling the blade lift movements, the essen
stantially vertical position during the levelling works.
In this arrangement the two large-diameter hydraulic
admission of pressured air in the conduit 24 and mounted
on the hand lever controlling the distributor of cylinder
P. The quadrant S has a number of holes such that the
lift cylinders D1 providing a relatively short stroke are
trunnioned in bearings formed in a pair of ?anges of U 60 maximum amplitude of the angular displacement of lever
L be consistent with the general setting of the grader on
shaped brackets W rigidly mounted on the main frame
the site to be levelled or otherwise worked upon.
of the grader. The rods of these hydraulic cylinders ex
This amplitude should be about 180° and the move
tend transversely to the grader and oppositely to each
ments between extreme positions are controlled by means
other, and each rod is pivoted on a quadrant H1 mounted
for loose rotation about a shaft Z parallel with the trun 65 of several successive operations of the cylinder P which
correspond to successive locking engagements of the pin
nions of the relevant cylinder, each shaft being journal
Q in the different holes of quadrant S. The end of the
led in bearings carried by the main frame of the grader.
of cylinder P is pivoted on a pin T rigid with the main
These shafts Z are rigid with arms E1, E2 disposed at a
frame of the grader.
proper relative angular setting, that is, an arm E1 having
If desired, the hydraulic cylinder may be mounted the
mounted thereon a pneumatic locking device G1 and an 70
way, so that its body be pivoted on a pin n'gid
other arm Ez controlling the lift movements of the blade
with the frame, but this arrangement is less advantageous
carrier through the medium of a sliding rod V. The
for it increases the transverse over-all dimensions of the
?rst arm E1 provided with the pneumatic locking device
G is adapted to engage one of the holes formed in the
assembly. The same would apply on the other hand to an
quadrant H1 according to the type of work to be per 75 arrangement comprising a cylinder P having its rod pro
vided with a rack meshing with a pinion mounted on the
shaft I. However, this last-mentioned arrangement would
still remain within the spirit of the present invention.
The shaft rotation may also be controlled if desired by
means of a hydraulic motor energizing a plurality of
cylinders fed through adequate distributors having their
slide valves responsive to a cam according to a system
versal joints carried by said beam, the locking means re
siliently urged to their locked condition for securing said
connecting means in an adjusted position comprising a
pin slidably mounted in said arm and resiliently urged
for engagement in one of the quadrant holes, the pneu
matic means for releasing said locking means with a view
to change the adjusted position being arranged to remove
said pin from the quadrant.
3. Device for controlling the orientation of the blade
already known in mechanisms for rotating the blade
supporting circle of graders and scrapers. This speci?c
arrangement is advantageous in that it eliminates the
quadrant S and the locking pin Q. Nevertheless, in this 10 mounted on the frame of a grader as set forth in claim 1,
wherein the connecting means for adjustably connecting
arrangement some locking means must necessarily be pro
vided in order to cope with ‘accidental overpressures or
overloads likely to occur in the component elements of
the hydraulic motor as a consequence of fierce reactions
each cylinder actuating one of the two lift motions of
the beam comprises trunnions rigidly carried by the body
of said cylinder, two ?anges with bearings formed therein
carried by the frame, said cylinder body being pivotally
during the operation of the vehicle.
mounted on said ?anges by engaging its trunnions in
Each one of the three universal joints R2—R4 and R5
said bearings, a perforated quadrant pivotally mounted
may be controlled by means of a device of the type illus
on said frame and adapted to be actuated by the rod of
trated in FIG. 4, wherein the reference numeral 1-1 desig
said cylinder, a shaft mounted for free rotation on said
nates the cylinder~controlling hydraulic distributor, 12
being the pneumatic distributor for controlling the lock 20 frame coaxially to said pivoting quadrant, a radial arm
carried by said sh ft, a ‘ball type universal joint carried by
ing pin G or Q. The hand lever 13 controlling the
said radial arm and a rod pivotally mounted between said
radial arm universal joint and one of the two lift ball type
cylinder by pivoting in the direction of the arrow 7'' car
ries on its outer or upper end a knob or handle 14 and has
universal joints carried by said beam, the locking means
pivoted thereon, in the vicinity of this knob or handle and
by means of a pin 15, a trigger 16 adapted, through link 25 resiliently urgedto their locked condition for securing
said connecting means in an adjusted position comprising
members 17, 18 and 19, to control the release of the
another radial arm carried by said shaft and a pin slid
locking pin G or Q when the trigger in is pulled in the
ably mounted in said other arm and resiliently urged for
direction of the knob or handle 14, \as shown by the
arrow g.
engagement in one of the quadrant perforations, the pneu
Although the present invention has been described in 30 matic means for releasing said locking means with a
View to change the adjusted position being arranged to
conjunction with preferred embodiments, it is to be
remove said pin from said quadrant.
understood that modi?cations and variations may be re
4. Device for controlling the orientation of the blade
sorted to without departing from the spirit and scope of
mounted on the frame of a grader as set forth in claim 1,
the invention, as those skilled in the art will readily under
wherein the connecting means for adjustably connecting
stand. Such modi?cations and variations are considered
the cylinder actuating the shift motion of the beam com
to be within the purview and scope of the invention and
appended claims.
prises a pin mounted on said frame and having the cylin
What I claim is:
der rod pivotally mounted thereon, a' shaft pivotally
1. For a grader comprising a main frame ‘and a blade, 40 mounted on the frame and parallel with said pin, two
radial parallel arms rigidly carried by said shaft, and
a device for controlling the orientation of the blade,
having bearings formed therein, two trunnions carried
which comprises a beam on which the blade is adjustably
by the cylinder body pivotally mounted in turn between
secured, a ball type universal joint carried by the main
said two arms by the engagement of said trunnions in said
frame, said beam being pivotally mounted in the ball type
universal joint carried by the main frame, three double 45 bearings, another shaft rotatably mounted in said frame
coaxially to the ?rst shaft, a perforated quadrant rigidly
acting hydraulic cylinders for actuating respectively and
carried by said other shaft and engaging one of the two
independently two lift motions and a shift motion of said
radial arms of the ?rst shaft so as to be driven thereby,
beam, each of said three hydraulic cylinders comprising
a radial arm rigid with other shaft, a ball type universal
a body and a rod, three ball~type universal joints carried
by the beam, three adjustable connecting means to re 50 joint carried by said radial arm rigid with said other shaft
and a rod pivotally mounted between said ball type uni
spectively and independently connect each hydraulic cyl
versal joint carried by said radial arm rigid with said
inder between the frame and each ball~type universal joint
other shaft and the shift ball type universal joint carried
carried by the beam, three locking means resiliently urged
by the beam, the locking means resiliently urged to their
to their locked condition for securing respectively each
of said adjustable connecting means in an adjusted po 55 locked condition for securing said connecting means in
an adjusted position comprising a pin slidably mounted
sition, three pneumatic means to release respectively each
in the radial arm of the ?rst shaft ‘and resiliently urged
of said locking means for change of the locked adjusted
for engagement in one of the quadrant perforations, and
position, three hydraulic means to control relative move
the pneumatic means for releasing said locking means
ment of the body and the rod respectively in each hy
draulic cylinder and three control levers to control with 60 with a view to change the adjusted position being ar
ranged to remove said pin away from said quadrant.
a single hand respectively for each hydraulic cylinder,
both the corresponding pneumatic means and hydraulic
References Cited in the ?le of this patent
2. Device for controlling the orientation of the blade
mounted on the frame of a grader as set forth in claim
1, wherein the connecting means for adjustably connect
ing each cylinder actuating one of the two lift motions of
the beam comprises a quadrant formed with perforations
and secured on the frame, an arm pivotally mounted on
said quadrant and a fork-type universal joint carried by
said arm, the body of said cylinder being mounted in 70
said fork type universal joint and the rod of said cylin
der being mounted in one of the two lift ball type uni
Schol?eld et al. ______ __ Sept. 21,
Arndt ______________ __ June 24,
Lado _______________ __ Feb. 14,
Macdonald ___________ __ Dec. 4,
Ross ________________ __ Oct. 20,
Australia ____________ __ Sept. 3, 1952
France _____________ __ June 13, 1960
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