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Патент USA US2404820

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July 3o, 1946.
F?. P. WUERTZ ETAL '
2,404,820
LOADER
Filed June 21,` 1944
s sheets-sheet 1
ELMER. J. Lûusmz
@4
@Auf/4%@
July 30, 1946.
P, P. wUERfz `ET Al.
2,404,820
LOADER
Filed Juri@ 21, 1944
s sheets-sheet 2
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F’AuL P. uhmm.`
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hmm J. wos-Mz
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July 30, 1946.
P. P. WuERTz ETAL
LOADER
2,404,820
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lFiled June 21, 1944
5 sheets-sheet s
PAm. P. woe‘lz'rz
Emea. J. “wenn
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Patented July 30, `1946
2,404,820
UNITED STATES PATENT> OFFICE
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2,404,820
LOADER
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Paul P. Wuertz, Melrose, and Elmer J. Wuerta‘
Paynesvìlle, Minn., assignors to Minneapolis-'j `
Moline Power wImplement Company, Minne'-A
apolis, Minn.,n a corporation of Delaware
1
Application June 21, 1944, serial No. 541,322
18 Claims. (Cl. 214-141):
2
This invention relates to improvements in trac
tor mounted loaders for use in loading and han
dling manure, dirt and similar materials.
The primary object of our invention is to pro
Vide a loader of this kind which is very simple,
scopically related tubular sections Il and {2} and
the i'l'ls‘idev section l2 is pivoted O_n a transverse
axis- at its rear end I3 upon a bracket structure
i4 supported from the axle housing I. The for
ward ends of the booms are thus supported for
upward and downward swinging movements in
longitudinal planes. The outside sections l-'l of
compact and readily installed on or removed from
the tractor. Another object is to provide a loader
having novel and exceedingly eñicien'tly arranged
the booms l 0 may also move forwardly and rear
operating means by which a powerful lift may be
first applied tothe load to break loose packed nia-f
wardly with respectv to the inside section I2, the
latter movement being limited by stop pins I5
terial, and then a forward and upward lift applied
whiclrmay be inserted through any one of a series
of openings lr6 in sections l2 to select‘the' mini
mum overall length» of the booms as the sections
to- raise the load to a desired elevation. Sti-ll an
other object is to provide a loader of this charac
ter wherein- the various parts are so proportioned,
aretele’scoped or collapsed.
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and the weight so distribute-d3, that the front end
Arranged above the booms lil are the triangular
load on the tractor is kept' as low as possible and
operating fra-mes designated generally at il. VOne
the necessity for auxiliary support wheelsv for the
side of each such frame Il' comprises a telescop
loader completely eliminated.
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.ing
bar i8, one side a- lifting chain i9 and
These and other more detailed and specific ob
the' third side an operating or oscillating lever or
jects will be disclosed in the course of the follow 20' arm 20. The levers 20* are secured, as by bol-ts 2|,
ing specification, reference being had to the ac
to plates 22n carried' by the ends of >a transversely
companying drawings, in which~
extending lifting roll or sha-ft 23, said roll 2'3 be
Figi. l is a side elevation, partially in section of
ing journal'ed in bearings 2l (Fig. 5) secured to
our improved loader and the tractor', showing a
theV ends of a cross beam 25 which is bolted upon
manure- fork as the load carrier and showing the 25 the bolt ring H of transmission housing
The
fork` in the lowered position.
levers 2li thus are supported and arranged to op
Fig.` 2.is a` frontal sectional` view taken` sub'stanerate -as> a unit, swinging in upright longitudinal
' tial‘ly along the line 2-2 in Fig, 1.
planes above, but inwardly of', the booms mi The
Fig. 3 is a View similar to Fig.l 1 but showing.
the load raised.
30.
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Figc ‘t is a plan view of the loader as shown in
sion above the roll than below'a's elearly'show'n.
Fig. 1,. but showing a dirt scoop installed in place
of the manure fork.
lï‘ìg.` 5 is a fragmentary sectional4 view along the
line 5-5 inlï'ig. 1.
Referring now more particularly and by ref
erence characters to the drawings, A designates
35.
generally a conventional tractor of the row crop
type having widespread. reartraction `wheels B
powered by an engine yC and closely spaced. for
ward wheels D which are steerable by a steering
wheel E at- the operator’s ‘station F. , The tractor
40.
further includes a generally longitudinally dis
posed housing G which contains engine and trans
mission parts and which includesseparate sec- ‘
tions two of which are joined by the bolt ring or
flange structure H.` The axle connecting the rear
wheelsB is enclosed in a housing I'.
_ A
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Our loader comprises two substantially identi
cal side frame structures, one at each side of the
levers 2li are supported adjacent one endv upon the
roll 2?;V in such manner as to form a longer exten~
The push bars i8' are extended betweenl lower
ends of theA levers 29’ and forward end. portions of
theV booms lll. Each bar t8, compri-ses a pair of
telescopically assembled tubular sections, the in
ner rear section 26 bei-'ng pivoted at 2l to the as
sociated lever 25, while the outer, forward section
28 is pivoted at 29 toa bracket plate 3i! welded to
the boom I8 at :inappropriate point. Collapsing
or telescoping movement of the push bar sections
26 and 2S is limited by a stop pin 3l which may
be inserted through any one of a series of open
ings 32 in the rear section to engage the rear end
of' forward section 28.
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The lifting chains lI9 are~ each. Connected at one
endi‘to‘the» bolt or pin fornîing‘ the' Divot connec-l
tion ES between push bar' i8' and boom. lo and-at
their. otherends are adjüst'a'bly` connected toup
per ends of the levers'lûj by any suitable means,
such as the hooks33.
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tractor, and including" load carrying. booms lil
which are disposed lengthwise alongside the trac
tor A, extending from the rear axle housing I
forwardly beyond the front wheels D a substan
I'T thus formed we provide at; each side ofthe
tractors; hydraulic jack or ram 3,4 <each of which
is of Well known construction and .eomprisestwo
tial. distance. Each boom ILU comprisestwo tele-`
telescoping parts" one ofzwhi'cn is pivotally' con»
AF’or oscillating the' triangular operating frames
2,404,820
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nected at 35 to the adjacent lever 28 above the
lifting roll 23 while the other is provided with an
apertured ear 36 by which it is connected to the
tractor A. For this purpose a mounting plate 31
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jacks 34 causing them to extend and oscillate the
levers 28 in a rearward direction at upper ends.
The resulting lifting action actually has two
cycles or phases, In setting up the loader in the
down or loading position, the stop pins 3I for the
is bolted at each side of the housing G above and
push bars I8 are installed in one of the openings
immediately to' the rear of the front wheels D
32 in such position thatthe rear ends of forward
and extending laterally from each plate is a sup
seotionsu28 of the bars will Asubstantially clear
port arm or beam 38 rigidly supported by the
the pins as seen in Fig. 1. Thus space is provided
plate. An angle bar 39 is detachably secured on
the forward and upper sides of the arm 38 by 10 by means of which the push bars may beper
bolts 49 and on this bar is secured spaced bearingV , mittedto collapse or'telescope freely at first.
Bearing this in mind it will be evident that the
ears 4I between which is fitted the aforesaid ears
of the jack 34. A pin 42 forms a pivot connection Y . initial rearward swinging movements of upper
at this point and supports the jack for 'swinging Y ends of the levers 28 will result entirely in a pull
being exerted on the chains I9 and an upward
movements in a plane parallel with that through
which the associated lever 20 moves. A series of ' lifting.' effecten forward ends of the booms I9.
. The booms as they start to swing upwardly will
openings 43 in the levers`2Il permits adjustment
of the connection 35 according to the stroke “off ` thus oscillate'about their rear end pivots I3 fol
lowingthe’curved path indicated at X in Fig. 3.
The nearly straight upward lifting movement
powered by the pull ofthe chains I Sis very force
Secured, as b-y welding, tothe ends of the angle
ful and _enables the load on the `carrier 5I to be
bars 39 are the upright legs or sides 44 of a guide
broken loose without difñculty, evenv if the ma
member 45‘of inverted U-shape which straddles
terial is very tightly packed and heavy.
the forward part of the tractor A. Said legs 44
are disposed inwardly of `the push barslß but in 25 During this preliminary direct power lift on
the booms Ii] the triangular frames comprising
position to guide the same in their up and down
the push bars I8, chains I9 and levers 20 of course
movements, preventing inward lateral displace
the jacks and the-leverages desired as will be.V ' ~
readily apparent.
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ment thereof. Suitable brace bars 46 as seen in
each oscillate as a body. _As the carrierY reaches
Fig. 1 may be provided to rigidly brace the guide
members 45 and ends of theangle bars 39.
the upper limit of its travel on the arc X itwill
The jacks are each supplied with fluid under
be found that the pivots 2l at the rear ends of
the push bars have, due to forwardmovements
pressure by a line 41 leading from a control de
of the lower ends ofthe lever 20, traveled for
l vice 48 of any ,suitable kind, fluid being supplied
wardly with respect to the pivots 29 at’forward
ends of the lbars to the point that the push- bars
to the device 48 by a line l49 leading from a pump
59k located on the side `of the tractor housing G. 35 have collapsed or telescoped until their forward
sections 28 are stopped by the pins4 3l. Now the
As here illustrated the pump 58 is similar tothat
lifting movement enters its second phase. As
disclosed in the Victor N. Albertson Patent No.
this occurs the push bars I8 are rigid Vlengthwise
2,264,560 issued December 2, 1941, and takes oil
Vfrom the crankcase ofthe tractor engine C for
and continuation of the oscillation Vof the levers
supplying the jacks 34. Obviously any otherpres
29 not only now pulls upon _the chains` I 9 to swing
the booms I0 upwardly/_but further causes theV
sure source may be employed and when the fluid
is admitted to the jacks they will elongate, urging
push bars to exert forward thrust forces upon the
thel levers 20 in a rearward direction at their up
per ends, while as the fluid is allowed to return
the jacks will collapse allowing the levers to swing
forwardly again.
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The forward ends of the booms III support the
load carrier designated generally at 5I which may
be of any kind suitable to the work at hand. y As
booms. This action causes the booms to extend in
length, their forward sections I I sliding forward
ly Yupon their inner rear sections Iv 2Y away from the
stop pins I5 as seen in Fig. 3. Actually the load
carrier 5I now travels on an arc Y `(Fig. 3)v the
radius of which is centered about the axis ofthe
lifting. roll 23, or >in other words,- about thepivot
shown in Figs. 1 and 3 the carrier 5I is a manure 50
f axis for the triangular frames madeVv up of the ‘
fork having forwardly directed fork fingers 52
and tiltably supported on a transverse horizontal
>axis upon pivots 53 at the forward ends of the
booms. A latch 54 normally holds the fork in
substantially horizontal position but by >`ll‘ulling on ~»
the trip rope 55 the latch may be released to per-. 55
mit the fork to tilt downwardly and forwardly to
dump its load as seen in Fig. 3. 4As shown in Fig.
4 the load carrier 5I takes the form of a shovel or
parts I8, I9 and 25. The eiîect ofthis shifting
of the pivots (from I3 to 23) for the carrier is
to present the otherwise pronounced tendencyof
the> load carrier to swing rearwardly as it rises
to a substantial height as would occur were the
booms I9 of ñxed length. The forward projection
of the forward ends -of the booms, as a result of
the forward thrust of the push'bars I8, in fact
causes the raised load to stand well forward of
scoop 55 pivoted at 51 between forward ends of - - the tractor as shown in Fig. 3, which greatly
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the booms I0.
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facilitates its dumping upon a wagon,'truck or
Operation ,
spreader as will be obvious..>
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The positions of the stop pins l5 and 3l as -well
as the length of the chainsl i9 may bereadily ad
When the load carrier 5I is -lowered the parts
assume about the position shown in Fig. 1, `the
jacks 34 being collapsed and the booms I 0 angling 65 justed to vary the forward projection of the loald
as it rises, as well as to vary the leverages involved
downwardly and forwardly with their .forward
according -to theloads beinghandled. ' lSuch ad
sections II butting against the stop pins I5. Now
justments are interrelated but readily made on
to pick up aload of manure or other material the
the jobj
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tractor A may be driven forwardlyV to force A.the
load carrier into the material, the rearward 70 As the load carrierjis lowered the aforesaid ac
tions of course proceed in reverse until the daré
thrust being ltransmitted directly, by the booms
rier reaches Vloading position again. 'It will --be
Ill, back to the rear axle of the -tractor so that
noted thatthe >carrier is closely spaced to the
powerful force may be employed without undue
_strain on the lifting mechanism. As the carrier
‘forward end of the tractor when’lowered- andthat
5I is loaded it is raised by admitting fluid to the 75 the chains transmit the 'weight well to the rear
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of the-tractor front wheels D to relieve them as
combination, a telescopic boom disposed length
much as possible of the load.
wise alongside the Vtractor `and pivotally sup
ported at its rear `end thereon for up and down
movements at its forward end, a substantially
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It will be noted that, since the levers 23 at
each side are tied rigidly together by the» roll 23
there will result an equalization of the load such
that, should one side of the load carrier 5l be
loaded heavier than the other, the lifting forc‘e
of the jack at the more lightly loaded 'side will
be transmitted through the roll to the other side
to aid the jack thereat.
The loader may be readily detached from the
triangular lifting frame pivotally supported on
the tractor above the boom, said frame com
prising a pivoted lever having upper and lower
ends, a lifting member connected between the
forward end portion of the` boom and the upper
end of the lever, and a pushing member con
nected between the said forward end` portion of
the boom and thellower end ofthe lever, and
power operated means for oscillating the> frame
about its pivot to lift the bocm by said lifting
tractor by disconnecting the pivots I3, removing
the belts 2| and 4B', and disconnecting the sup
ply lines to the jacks, and then backing the
tractor out from between the side frames,` which
are blocked up to stand alone while thus discon
member.
nected.
It is understood' that suitable modifications
may be made inthe structure as disclosed, pro
vided such modifications come within the spirit
and’scope ofthe appended claims. Having now
therefore fully illustrated and described our in
vention, what we claim to be new and desire to
protect by Letters Patent is:
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angular lifting frame pivotally supported `onâ-the
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1. In a tractor mounted loader, a longitudi
nally extending boom disposed at each side of
the tractor, each boom comprising two telescopic
sections the rear one of which is pivoted at its
rear end on the tractor and supporting the for
ward section for up and down movements at its ‘
forward end, a load carrier supported by the for
tractor above the boom, said frame comprising a
pivoted lever having upper `and lower ends, a
lifting member connected between the forward
end portion of Ythe boom and the upper end of
the lever, and a pushing member connected be
tween the` said forward end portion of the boom
and the lower Aendi of 'theleveig> and power op
erated means for oscillating the frame about its
pivot to lift the boom by said lifting member, the
said pushing member having longitudinally slid
able portions and operative to push on the boom
in a forward direction-‘only after the 'boom has
been lifted to a selected degree.
6. A tractor mounted loaded comprising in
ward ends of the boom, power lift means mount
ed on the tractor and connected to forward sec
tions of the boomsto raise and lower said car
rier, said power liftvmeans including a member
movable forwardly in response to raising move
combination, _a telescopic boom disposed length
wise alongside the tractor and pivot-ally sup
ported at its‘rear end thereon for up and down
movements at itsA forward end, a substantially
ments ofthe lift means and connected to the
forward section of each boom to extend the same
in a forward direction as the carrier is raised.
triangular` lifting-‘frame pivotally supported on
thetractor above theboom, said frame compris
ing a pivoted lever having upper and lower ends,
a lifting member» connected between the forward
2. In a tractor mounted loader, a longitudi
nally extending boo-m disposed at each side of
the tractor, each boom comprising two telescopic
sections the rear one of which is pivoted at its
.
5. A tractor mounted loader comprising in
combination, a telescopic boom disposed length
wise alongside the tractor and pivotally sup
ported at its rear end thereon for up and down
movements at its forward end, a substantially tri
end portion of the boom and the upper end of
the lever, and a pushing> member connected be
tween the said forward end portion of the boom
and the lower end of the lever, and power oper
lated means for oscillating the frame about its
pivot to lift the boom by said lifting member, the
= .f said pushingmember having two telescoping sec
rear. end on the tractor and supporting the for- i'
ward section for up and down movements at its
forward end, >a load carrier supported by the
forward ends of the booms, a swinging frame
structure supported on the tractor above each
boom, and including a power lift actuated mem-
ber connected to the forward section of the boom
to raise the same, each frame structure also in
cluding a longitudinally extended push bar con
nected to said forward section of the boom and
movable forwardly during a part of the lifting
operation to extend the boom in a forward di
rection.
3. In a tractor mounted loader, a longitudi
nally extending boom disposed at each side of
the tractor, each boom comprising two telescopic
tions, and ‘adjustable stop means for limiting
telescoping action‘of said sections.
7. A tractor mounted loader comprising in
combination, a telescopic boom disposed length
Wise alongside the tractor 'and pivotally sup
ported at its rear end thereon for up and down
movements at its forward end, a substantially ‘
triangular lifting frame pivotally supported on
the tractor above the boom, said frame compris
ing a pivoted lever having upper and lower ends,
sections the rear one of which is pivoted at its
a lifting member connected between the forward
rear end on the tractor and supporting the for
end portion of the boom and the upper end of
ward section for up and down movements at its
the lever, and a pushing member connected be
forward end, a load carrier supported by the for
tween the said forward end portion of the boom
ward ends of the booms, a swinging frame struc 65. and the lower end of the lever, and power oper
ture supported above each boom, a hydraulic
ated means for oscillating the frame about its
jack connecting the frame structure and tractor,
pivot to lift the boom by said lifting member, and
said frame structures being pivotally supported
both the lifting and pushing members being se
on the tractor and so connected to forward sec
lectively adjustable in length.
tions of the booms that the booms may first be 70
8. In a tractor mounted loader, a longitudinally
swung upwardly a selected distance about their
extending boom disposed at each side of the
rear end pivots and then the load carrier moved
tractor, each boom comprising two telescopic
further upward in an arc centered about the pivot
sections the rear one of which is pivoted at its
supports for said frame structures.
rear end on the tractor and supporting the for
4. A tractor mounted loader comp-rising in 75 ward section for up and down movements at its
2,404,820
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14. In a tractor mounted loader, a boom 'ex-i `
forward end, a load >carrier supported by the
vtending lengthwise of the tractor from av pivot
connection therewith and to a point forwardly
thereof,> a load carrier on the front end Vof the
forward ends of the booms, power lift means con
nected to forward sections of the booms to raise
and lower said carrier, and stop means adjust-v
able lengthwise along the rear sections of the
booms kfor engaging .rear ends of the'forward
sections and limiting the telescoping action `of
the boom.
boom, a lever fulcrumed at a point between its
ends on the tractor for movement in a longi
tudinal vertical plane, a lift connection betweeny
one end of the lever and boom, and a connection
between the other end of the lever and the boom
9. In a tractor mounted loader, a, pair of ex
tensible booms disposed one at each side of the ll) operative to extend the boom as it is lifted.
15. In a tractor mounted loader, ¿a boom ex
tractor and pivotally mounted at their rear ends
tending lengthwise of the tractor from a pivot
thereto, iand with the forward ends of the boomsV
connection therewith and to a point forwardly
extending forwardly cf the tractor, a load car~
rier supported bythe' forward ends of the booms,
~ thereof, a load carrier on the front end of the
a power operated lever member fulcrumed on the
boom, a lever fulcrumed at a point betweenits
ends on the tractor for movement in a longi
tractor, a primary connection between the lever
member and boom eifective, upon initial opera
tion of the lever, to lift the‘boom and’ load carrier
to a predetermined height, and a secondary con
nection between the lever member and boom, ef
fective, upon continued operation of the lever, to
cooperate with the primary connection to lift
the boom and load carrier from said predeter
mined height and to extend the booms as they
are elevated from such height.
l0. In a tractor mounted loader, an extensible
y boom extending 'forwardly from a pivot connec
tion 'at the rear of the tractorr to a point-for-
tudinal vertical plane,'a lift connection between
one end of the lever and the boom, and a con
nection between the other end of the lever and
the boom operative to` extend` the boom asit is
lifted, said lift <connection being adjustable as
to length.
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16. In a tractor mounted loader, a boom ex
tending-forwardly from a pivot connection with
the tractor, said boom having front and. rear
slidably connected sections, a load carrier sup-,
ported by the forward boom section, a lever ful
crumed on the tractor, a hydraulically operated
device mounted on the tractor and connected with
wardly of the tractor, a load carrier supported by
the forward end of the boom, a power `operated 30 the lever'to> operate the same, a lift connection
between the lever and boom to lift the boom, and
lever fulcrumed on the tractor, a Vlift connection
` betweenone end of the lever and the boom, and a
connection between the Vother end of the lever
and the boom to extend the latter .as it is lifted.
a second connection between the lever‘and boom
to project the forward section of the boom with
respect to the rearrsection.
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17.‘In a tractor mounted loader, a boom ex
1l. In a tractor mounted loader, an extensible 35
tending forwardly from a pivot connection with
boom extending forwardlyY from a pivot connec
the tractor, said lboomhaving front Íand rear
tion at the rear of the tractor to a point for
slidably connected sections, a load'carrier sup
wardly of theftractor, a load carrier supported`
ported bythe forward boom section,y a lever ful¿
by the forward end of the boom, a power operated
lever fulcrumed on the tractor, a lift'connection 40 crumed on the tractor, a hydraulically operated
device mounted on the tractor and connected'with
between one end of the lever and the boom,‘and
the lever to operate the same, a lift connection
a connection between theother end of the lever
between the lever and boom to project the for
and the `boom Yto extend the latter as it is lifted,
ward section of the boom with respect to the rear \
said first mentioned end of the lever beinglonger,
with respect to its fulcrum, than the second men-_ 45 section, Vsaidsecond connection having a lost mo~
tion whereby it will not project the forward sec
tioned end of the lever.
tion of the boom until the load carrier has been
12. In a tractor mounted loader, an extensible
lifted to a predetermined height.
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boom >extending forwardly from a pivot connec
18. In a tractor mounted loader, a boom ex
tion at the rear of the tractor to a point for
wardly of the tractor, a> load carrier supported by 50 tending forwardly from a pivot connection with
the tractor, said boom having front and rear
the forward end of the boom, a power operated
slidably connected sections, a load carrier sup
lever fulcrumed on the tractor, a lift connection
ported by the forward boom section, a lever ful
between one end of the lever andthe boom, and
a connection between the other‘end, of the lever Y crumed on the tractor, a hydraulically operated
i and the boom to extend the latter as it is lifted, 55 device mounted on the tractor and connected withv
said lift connection being adjustable as to length. - the lever to operate the same, a lift connection
between the lever and boom to lift the boom,
13. In altractor mounted loader, an extensible
boom extending forwardly from a pivot connec
and a second connection between the lever and
boom to project the forward section of the boom
tion at the rear of the tractor 4to a pointrfor
wardly of the tractor, a load carrier supported 60 with respect to the rear section, said second con- "
nection including telescopically connected push
bythe forward end of the boom, a power oper
ated lever fulcrumed on the tractor, a lift con
nection between one end of the lever and the
boom, and a connection between the other end
of the lever and the boom to extend the latter 65
as it is lifted, said second mentioned connection
between the lever and boom comprising aV push
bar that'is adjustable as to length.
bars and a stop for limiting the telescopic’action
in
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one
direction.
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PAUL P. WUERTZ.
ELMER J. WUER'I-‘Zv
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