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Oct. 1,‘ 1946.
R, |_, AKERS
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2,408,360
1mm commm POWER swmunc UNIT
Filed June ‘29, v1945
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INVENTOR.
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R.L.Hker5
I
BY
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2,408,360
Patented Oct. 1, 1946
7
J,
JAJkerS, Peoria; 111:, 'assi‘gnor'to _
, 1 -R..G'.Les'1I0urneau,.Inc., steektenkoaurgaeorg >
J A, ' notation of“ California
>
‘Application squeeze, 1945;;SerialiNm?OZ?? I
mains. (o1. 186479.47
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2,:
tongue 0i’; yoke->12; lof-rartrailen,‘ and;
‘This; invention: is .- directed<-to~,i,,and ¢it:,1'is ' an 0101-‘
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ject-twmovide; a novel draft-coupling; andgpgower;
prises;
'- An enclosed:
the - following
gear; housing;
structural}
3:...which:
arrangement-r.
is substan-v
steeringijunit l arranged for ‘connection- between‘: a:
tiallytiroullar in {plans is disposed in spaced rel‘ar
tiomabovea the.» deck: l», of. the . tractor,‘ and. said
tracton andthe-forwa-rdly projecting draft ,tongne;
oryokeof a=tr~ailer:.
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Such. a: combination,'__but1 with'a-l draft~ coupling
and power steering, unita-of. modi?ed’, desigrn; is
housing includesaa-t opposite ends,>;oppositely> and
l0n'gitudinallyeextending;tr-unnionsMandi- {The
trunnions- 4;; and; 5r‘ arel tur-nablyr supponted._. in".
heavy-‘duty ears or. bearing; bracketsr?iwhlch are
plication entitled=Powerjsteen for'vehicles, Serial
No. 57123684,- ?ledmlanuary- ‘1:3; 1945,.,Eatent--;No. '10. ?xed Tin: connectionr with: and-.upstandlfrpmithe,
shown for example in copending U. S..pa-tent:i ap.-
deck I. As so mounted the- gean.housingl=,:_3i is
2>€1D0;-2l§3;- granted: May 14,~;1~,946-.-_
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A further object of the;presentzinventiomis-to
provide: arc-draft coupling’; and E power: steering unit
adapted; to connect a tractor and trailer in steerr:
able, yet laterally; tiltable. relation; the power
steering mechanism». of lithe -\ unit being. arranged
termination: proper-ly'and- e?ectively regardless of
normalwrelative- - lateral. tilt- between: the tractor
andtrailer'.
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An additionalobjec. risgtoiprovidaa draitmcou;
plingjiand power: steering unit-,,;asz inzthezpreceding
paragraph’, inqwhichvthei unit includes a; housing.
mountedon thetractojr for relativealatera‘l tilting
about 31:. longitudinally extending; substantially
horizontal a-xi-sg. an‘. upstanding-?nest. rotatably
mountediin: and pro?ecting‘jupwardly: from; the
housing tor; rigid: ‘connection with:v the: trailer}: at
reversibl-yvdriven shaft; enteringl said. housing
supported .for; lateral‘ tilting, movement-1 about: a
substantially. horizontal" longitudinally, extending,
a'XiSiu
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Substantially centrally; thereoi. the . gear house
ingf 3713 formed"? with. amYupward1‘y-_~pro;eetingv
bearing neck .11. andanupstanding post. vilrisssuit-g
ably journalediin the housingt in a bearing .la‘
and; extends in: turnable relation.~ upwardly,
througlr said- bearing neck. l’ to a termination
thereaboye.
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Aboveetherbearinggneck. ‘l the postaamis formed;
with; Y a“). ?at-,t vertical,» and- normally 1 rearwardly,
facing attachment‘plate 9rto<whichz a correspond
ing. attachment», plate,v 10 on; the. forward. end. of
the: draft-tongue or yoke? of the trailer is'coupled
inidetachable-relation bysecuringibolts Ll
’
By: reason-‘of: the above. described?structuresthe
axially;~ and-igears. in the housing; connecting, the
drive: shaft and postiwhereby; the. latter is: rotated
tractorv is: coupled ' 'n: steerable but laterally tilt.‘
to~steer the tractor: regardless vofithernorn'lal rela:.
tive lateral tilt betweenthe-latten and; the: trailer;
Another‘ object; ofithe: invention‘. is: to; provide
in: order: to: accomplish‘. steering of.» the. tractor
relative =1 to:v ther trailer;
1%» bevel gear His disposedin the gearhousing
31 and. includes aaverticali axis hub .l3 surrounding
and ?xed in connection with the post 8.‘. The
a;- draft. couplinggandzpower steering: unit"- which
is :very simplein; desigm-hui'nruggedz and reliable
in construction, as is necessary for tl'l'Bi-IJUIXDOSB‘
ableerelation tolthetraileri; the :posteB being rela
tively-rotatedlbyrthe. following power. mechanism
bevel. gean faces‘. downwardly» and.v runs 1 in ,_ mesh
themnitlfissusedi'
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with a. horizontal axis, bevel pinion I4 disposed
These objects are accomplished by means of
in the forward portion of the housing 3. The
such structure and relative arrangement of parts
bevel pinion I4 is-?xed on the inner’ end of a
as will fully appear by a perusal of the following 40 drive shaft l5 which extends axially through the
trunnion 5, being carried in a suitable bearing
speci?cation and claims.
i
Hi. The shaft I5 is selectively and reversibly
In the drawing similar characters of reference
for:
indicate corresponding parts in the several views:
Figure 1 is a side elevation of the draft cou
driven by tractor engine actuated power trans
45 mission means (not shown), but which may be
of any suitable type.
With powered rotation of the shaft [5 in one
direction or the other, relative turning of the
post 8 in the bearing neck ‘I results, causing steer
ing of the tractor in'a corresponding direction;
50
the unit.
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such
steering being accomplished regardless of
Referring now more particularly to the char
the
relative
lateral tilt between the tractor and
acters of reference on the drawing, the draft
trailer,
and
for
the reason that such lateral tilt
coupling and power steering unit is adapted for
ing merely rotates the gear housing 3 axially
connection between the deck I on the rear of
a tractor, and the forwardly projecting draft 55 about the drive shaft l5 and thus does not ‘inter
pling and power steering unit as mounted be
tween the rear end of a tractor and. the forward
end of a trailer.
Figure 2 is an elevation, mainly in section, of
3
2,408,360
fere with proper driving engagement of the bevel
pinion I4 with the bevel gear l2.
For the purpose of ease of assembly the gear
housing 3 is shown as being of sectional construc
tion, including a top and bottom section having
4
steering unit comprising a member adapted to be
mounted on the tractor for relative lateral tilting
about a longitudinal axis, a post adapted to be
?xed in connection with the trailer, said post be
ing mounted on and projecting from the member
matching ?anges I1 secured together by bolts I8. I
From the foregoing description it will be readily
for relative rotation about _an upstanding axis,
seen that therehas been produced such a ‘device ‘
thereinto,"a reversible drive shaft projecting into
the member and disposed co-axially with the said
longitudinal axis of tilting thereof, and drive con
Mnectionsv between the shaft and post within said
as substantially ful?lls the objects of the inven
tion as set forth herein.
While this speci?cation sets forth in detail the
present and preferred construction of the device,
still in practice such deviations from such detail
saidmember being hollow and the post extending
‘member; said drive connections comprising a gear
on the post and a pinion on the shaft.
may be resorted to as do notjform a departure
_5_. A_' tractor-trailer draft coupling and power
from the spirit of the invention; as de?ned by 15 v‘steering unit comprising a member adapted to be
the appended claims.
mounted on the tractor for relative lateral tilting
Having thus described the invention, the fol- ‘
about a longitudinal axis, a post adapted to be
lowing is claimed as new and useful and upon \
?xed in connection with the trailer, said post be
which Letters Patent is desired:
ing mounted on and projecting from the member
1. A tractor-trailer draft coupling and power 20 for relative rotation about an upstanding axis,
steering unit comprising a member adapted to be
said member being hollow and the post extend
mounted on the tractor for relative lateral tilt
ing thereinto, a reversible drive shaft projecting
ing about a longitudinal axis, a post adapted to be
into the member and disposed co-axially with
?xed in connection with the trailer, said post be
the said longitudinal axis of tilting thereof, and
ing mounted on and projecting from the member
drive connections between the shaft and post
for relative rotation about an upstanding axis, a
within said member; said drive connections com
gear secured concentrically on the post, and a
prising a bevel gear on‘ the post and a bevel pinion
reversibly driven, shaft supported pinion in mesh
on the shaft.
7
with the gear, said pinion and laterally tiltable
6. A tractor-trailer draft coupling and power
member being coaxial along the longitudinal axis 30 steering unit comprising a housing adapted to be
of tilting of the latter.
mounted on the tractor-for relative lateral tilting
2. A tractor-trailer draft coupling and power,
about a longitudinal axis, a post journaled in the
steering unit comprising a member adapted to be
housing and projecting therefrom for relative ro
mounted on the tractor for relative lateral tilting
tation about an upstanding axis, the projecting
about a'longitudinal axis, a post adapted to be 35 portion of the post being adapted to be ?xed in
?xed in connection with the trailer, said post be
connection with the trailer, and drive means for
ing mounted on and projecting from the member
imparting such relative rotation to the post con
for relative rotation about an upstanding axis,
nected thereto within the housing; the housing
said member being hollow andthe post extending
including oppositely extending trunnions about
thereinto, and drive means connected to the post
Which said housing is adapted to tilt, and said
within the member and operable to eifect such
drive means including a drive shaft entering the
relative rotation of the post without affecting
housing co-axially through one of said trunnions.
such lateral tilting movement of the member.
7. A tractor-trailer draft coupling and power
3. A tractor-trailer draft coupling and power
steering unit comprising a, housing having op
steering unit comprising a member adapted to be
positely projecting trunnions adapted to be jour
mounted on the tractor for relative lateral tilting
naled on a tractor for relative lateral tilting of
about a, longitudinal axis, a post adapted to be
said housing about a longitudinal axis, a post
?xed in connection with the trailer, said post be
journaled in the housing and projecting there
ing mounted on and projecting from the member
from for rotation about an upstanding axis, the
for relative rotation about an upstanding axis, 50 projecting part of the post being adapted to be
said member being hollow and the post extending
?xed in connection with the trailer, a gear se~
ther'einto, a reversible drive shaft projecting into‘
the member and disposed co-axially with the said
longitudinal axis of tilting thereof, and drive
' cured concentrically on the post in the housing, a
reversible drive shaft projecting into the housing
co~axially through one of said trunnions, and a
connections between the shaft and post within 55 pinion on the shaft in mesh with the gear within
themember.
4'. A tractor-trailer draft coupling and power
the housing.
RICHARD LAWRENCE AAKERS.
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