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Патент USA US2853326

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Sept. 23, 1958
> _J_ D, wAbpLE
. 2,853,317
TRAILER HITCH.
Filed March 1, 1957
v
2 Sheets-Sheet 1
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I40
INVENTOR.
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710/32 65/
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30
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1:014‘: a. moaaAz,
7” , _
4770'”, Y: -
Sept. 23, 1958
J. D. WADDLE
TRAILER HITCH
Filed March 1; 1957
2 Sheets-Sheet’ 2
52
INVENTOR.
JM‘S O.
.
2!
By
M4004‘,
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i
JTTQQ/VEYS.
United States PatentO’ ice
p
v2,853,317
Patented Sept. 23, 17.958
2
at 10 is a fragmentary rear end portion of a, draft vehicle
having suitably secured in a transverse aperture amount
ing bolt 12 extending through a suitably conformed
mounting ball 14. A fragmentary portion of a suitably
conformed trailer-tongue is indicated at 16, said tongue
including an integral vertically extending post 18 having
secured on the upper end thereof suitable launching
2,853,317
TRAILER HITCH
James D. Waddle, Somerset, Ky.
pulley (not shown). Although not shown, the trailer
Application March 1, 1957, Serial No. 643,315
10
7 Claims. (01. 280-511)
will incorporate a conventional hand manipulable brake
lever for applying brake shoes ‘to-the brake drumsof the
trailer, the lever being vertically pivotal and in engage
ment with a ‘serrated sector engageable with a spring urged
latch. The lever of the brake will incorporate a rear
wardly extending abutment rod 20 which will be urged
This invention relates generally to vehicle‘attachments,
15 toward the terminal end of the trailer tongue 16 when
thesbrakes are applied, see Figure 5, for example.
and is more particularly concerned with a novel trailer
Indicated generally at‘22 is a preferred embodiment of
hitch for detachably securing a draft and trailing vehicle
in tandem.
the‘ novel trailer hitch. Indicatedv generally at 24 is a
coupling ‘member constructed of any suitable material
A primary object of invention in conformance with
that set forth is to provide a trailer hitch especially adapt-t 20 and incorporating avrearwardly disposed upwardly open
ing recess portion 26, see Figure 2,, de?ned by a pair of
able foruse on a boat trailer or the like including means
for readily engaging or disengaging the trailer hitch sup
opposed side walls 28"and ,30 integral with a transverse
Web 32, transversely ‘apertured and secured in juxtaposi
ported on the tongue of a trailer onto the'vertically ex
tending mounting ball on a draft vehicle.
tion on the upper surface of the tongue 16 by means of
suitable mounting'bolt assemblies ‘34. The recess 26 is
de?ned by means of an upwardly angulated transverse
Another object of invention in conformance with that
set forth is to provide a trailer hitch including a coupling
member incorporating a forwardly extending depending
abutment wall 36, saidabutment wall 36 de?ning one'side
of a forwardly extending downwardly opening recess
recess, the forward end of which being of a spherical con
?guration partially conforming to a vertically extending
38. The recess 38 extends beyond‘the terminal end of
mounting ball on a draft vehicle, said coupling member 30 the tongue 16 and incorporates at its forward end a_
incorporating means for automatically locking the mount
spherically conformed socket portion 40 for receiving
therein one side portion in the upper end of the mounting
ing ball of a draft vehicle in the socket portion of the
ball 14. The socket portion 40 incorporates a transverse
coupling member upon extension of the socket portion on
aperture through the upper end as indicated‘ at 42. The
said mounting ball, and further including hand manipu
lable lever means for releasing the secured relationship
upper end of the socket portion 40 continues rearwardly
between the coupling member and the mounting ball of
in a housing portion 44 extending between the transverse
wall 36 and said socket portion, said recess portion in
the draft vehicle.
_
oo'rporating mutually parallel sides'46, one of which being
And yet a still further object of invention in conform
ance with that set forth is to provide an improved trailer
shown in Figure 2, and a transverse top wall 48 trans?
versely apertured as indicated at 50. 7 To aid‘in'retaining'
the coupling member 24 on the tongue of the‘ trailer, a
hitch of the character involved which is readily and
economically manufactured, easily mounted and main
tained, and highly satisfactory, practical and acceptable
for the purpose intended.
pair! of suitably conformed mounting plates 52 are, disiv
posed on opposite sides of the tongue and the vertically
~
extending posts 16 and 18, respectively, said plates having‘
These together with other objects and advantages whic
aligned transverse apertures therethrough through which
will subsequently become apparent reside in the details
of construction and operation as more fully hereinafter 45 extend suitable mounting bolts 54, some of which'in
corporating thereon suitable spacer sleeves 56.
described and claimed, reference being had to the ac~
The coupling'member 24 has extending transversely’
companying drawing forming a part hereof, wherein like
numerals refer to like parts throughout, and in which:
through the ‘side walls 28 and 30 intermediately of the
upwardly opening rear recess 261a suitable mounting
Figure 1 is a top plan view of the novel trailer hitch,
showing the same mounted on a fragmentary portion of 50 shaft-58. Indicated at 60 is a latch-plate incorporating
a transverse web; 62 integral. with oppositely disposed
the tongue of a boat trailer, and showing a fragmentary
mutually parallel side walls: 64 and 66 which are dis-lv
portion of a draft vehicle having a vertically extending
spherical mounting ball thereon;
posed on the outside of the sidewalls 28 and 30, respec- Y
tively, see Figure 3. ,.The side walls "64 and 66 have ex
Figure 2 is a section taken substantially on the plan
of line 2—2 of Figure 1;
'
55
tending transversely therethrough aligned apertures 68
Figure 3 is afragmentary section taken substantially
on the plane of line 3——3 of Figure 2, showing by means
extends accordingly permitting vertical pivotal movement'
of phantom lines the manner in which the cooperating
of the latch-plate 6tl.- The'side walls 64' and 66 also
through which an'interm'ediate portion of the shaft 58
incorporate a second pair of alignedapertures 70 rear-‘
between the trailer bitch and the mounting ball upon 60 wardly spaced from the apertures 68 ‘for-“receiving there- -'
through a suitable lock bolt, see Figure 3,’as will subse
which the same is mounted;
, v
quently bev described in detail. YThe web 62 of the
Figure 4 is a side elevation, similar to Figure 2, show
latch-plate continues vforwardly in overlying relationship
ing the relative position of the parts when the trailer
relativeto the recess portion 38,‘ said portion. of ‘the web'
hitch is locked on the mounting ball of the draft vehicle;
parts of the hitch are manipulated to permit separation
and
Figure 5 is a side elevation, looking at theside of the
hitch opposite that shown in Figure 4, and showing the
relative position of the hitch with respect to a mounting
65 incorporating a transverse vaperture 72 ' therethrough,a
see Figure 2 Forwardly of the, aperture portion 72, the.
web incorporates a substantially right angulartbe’nd por-i
tion 74 transversely aperturedt at‘ 76, said, apertured por- '
tion 76 having extending therethrough a depending eject- '
ball on a draft vehicle when the bitch is disengaged from 70 ment pin assembly indicated generally at 78.: ~
said mounting ball.
Refining to the drawing in detail, indicated generally
The aperture portion 72 ofthe web 62 has extending
“therethrough a support rod 80'taking the con?guration
2,858,317
3
ture portion 134 being in alignment with the aperture por
of'an elongated'bolt having an enlarged lower head por
tion'82rand'an'upper'threaded‘end 84; The lower portion
of the support rod 80 extends through a suitably con
formed transverse bore portion 86 of a latch-plate .88 ex
tending'transversely ‘of' the recess‘ 38' between .side walls
44*thereof: Thetrear edge oflthe ‘latch-plateJ88Iis-*angu—
lar'ly conformed as ‘indicated at‘ 90,‘ see “Figure .2, for con
tion 126 and extending through the wall 30 of the cou
pling member. Disposedrwithin the tubular housing 122
Ct
is a compression spring 136 which biases the pins 124 and
132 laterally of the outer surface of the respective side
walls 28 and 30. Said pins will extend through the aper
tures 70 in the side walls 64 and 66 of the latch-plate
automatically locking the 'hitch\on the mounting ball 14,
forming with‘ the adjacent‘ surface of theiabutment wall
36‘, the opposite transverse edge of‘ the latch-plate having
as seen for example in'Figuresl through 4. The pins
124 and 132 and bolt 120 extend through suitable aper
tures in the rounded'ends 1-38‘ and‘ 140, respectively, of
tary to the adjacent surface of the mounting ball 14.‘ The
the pair of lever elements 142 and, 144 which’ are, inter
shaft 80 extends through the aperture 50 inthe upper
posed'between inner surface portions of the walls 28 and
wall 48 de?ning recess 38, said' aperture 570 being a.rela
30, and the endof the tubular sleeve 122 and the abut
tively looset?t to permit pivotal movementof'the latch
plate 60 for disposingthe latchblock 88 in the position 15 ment collar 130, respectively. Levers 142 and 144 in~
corporate an intermediate angular bend or fulcrum por
shown in Figure '5 for separating the hitch from» the
a ‘concaved con?guration as indicated at v92 complemen
10
mounting ball-1'4. The shaftj80 hascircumposed there
about a suitable. compression spring 944opposite ends of
which being in engagement with‘ the, upper surface of the
latch block 88' andthe undersurfaceofj the wall 48.- The 20
spring 94'aids intthe. releaseofthelhitch fromthe mount
ing ball .14, and, disposes said latch block 88. in.a position,
see Figure 5, to permit rthesball 14.to enter-thesocket por
tion 40. 'Mountedon the upper threadedrend of-the, shaft
80, area pair of- suitable nuts‘ 96and 98, the upper nut 98
serving as arlocknut for, maintaininga. speci?c adjusted
relationship ofrthe shaft 80 and thelatch block 88.
The latch block or: plate .88 incorporates transversely
thereacross and opening into the under surface thereof
an .arcuate groove100 alignable with oppositely disposed
and aligned apertures 102 extending through the side
wallsv 44 for receiving’ therethrough the shackle portion
of a. suitable lock indicated generally at 104, see Figure 2.
This expedient, ofcourse, will prevent tampering with
the, trailer in an attempt to steal the same, for example,
when the trailer it hitched to a .draftvehiele.
The ejectment pin assembly 78 comprises an elongated
pin member 106, the lower end 108 of which being ex
tendable through the aperture 42 in the socket portion
40'and- engageable with the mounting ball 14, as clearly
seen in Figure 5, when the hitch is separated fromthe
draft vehicle. The upper end 110 of the pin 106f'is-1suit
ably threaded having secured thereon a mounting sleeve
112 and retained thereon by means oftsuitablezmounting'
nuts 114. A.suitable’compressionspring 116 isscircum 45
tion 146 and 148, respectively, abuttingly engaging the
inner surface portion of. the respective. walls‘ 28 Iand'30,
and continue in inwardly directed converging end portions
150 and.152, respectively. The end portions 150-and152
extend in overlying relationship relative to the mounting
shaft'58, as clearly seenin Figure-3. The mounting shaft
58 has journaled thereona support sleeve 154 extending
between the side walls_.28 andt30 of the'coupling'member,
said sleeve having integral-therewith and extending later
ally therefroma camvpin .156, an intermediate portion;of
which having disposedthereon an abutment collar 158.
disposed. betweenrthe opposed’ inner surfaces of'thelevers
142' and. 144. Considering, Figure 3, movement ofthe
camming-pin 156_from the solid to thedotted line posi=
tion shown. in Figure 3 will urge the converging ends, of
the levers 142- and 144 to the dottedtline'position shown"
inFigure 3 ‘about the. fulcrum portions 146v and,148.,;re;
spectively, accordingly urging the pin- portions, 124 and:
126 of the bolt 120 out of of engagement withthesaper
ture 70 in the side walls 64 and,66yof thexlatch-plate'r6?i
and permitting counterclockwise movementyoftthelatch
plate. for the purpose of separating‘the: hitch’ fromzthes
mounting ball 14.
'
The cam pin 156 extends through an elongatedlost;
motion slot portion 160 in the web 62. ofthezlatoheplate,
thus permitting counterclockwise rotation thereof?prior,
to ‘counterclockwise movement of the latcheplate- ac;
cordingly, permitting the: release of said latch-plate.vfrom>
its locked position before thehitch is’ separated.from:the=
mounting ball. Indicated generally at 162 is.an:actuating lever assembly utilized; for separating the‘ hitch
from the mounting ball. The actuating leverv assembly
incorporates a downwardly. opening U-shaped mounting‘
posed about thesleeve 112,,one end of which’ beingren
gaged with, the-undersurface of they web portion 74, the:
other end of which being in engagement withtheupper
surface-ofthe-ilower. retaining nut .114. Thus ‘as-the latch
plate 60 is pivotedin a clockwise direction, as‘viewed .in 50 member 164-including a- transverse web 166 and mutual1y parallel sides 168 and 170, said sides168 and 170 in»
Figure 5, for example, the compressiomspring 116‘ will be
corporating transverse apertures therethrough received
compressed:as indicatedin Figure 5,.and at the. same time
on’ the mounting shaft 58, see Figure 3, saidshaft de
the compression'spring 94 tends tourge the latch-plate
?ning thelaxis of rotation of the actuating lever assem
88. out of engagement with the adjacent‘ side portion of
the. mounting ball 14, accordingly separating the mounting 55 bly 162. The web 166 of the member 164 incorporates
ballv 14 from the hitch. as seen in Figure 5.
When re
a transverse aperture 172 therethrough, see Figure 2,
engaging the hitch to the mounting ball 14, the socket
portion 40' of; the bitch ‘is moved downwardly upon the
through which the cam pin 1561extends. Suitably secured
in diverging relationship from the sides 168 and 170 are
mounting ball 14,- suchmovement causing engagement
suitable handles or levers 174 and 176 ‘for applying the
of the lower end portion 108 of the‘pin 106, urging‘the 60 force necessary to rotate the latch-plate 60 in the
latcheplate‘60 in’a counterclockwise direction as viewed
counterclockwise direction, seen for example in Figure
in Figure 2,: for example,v such movement compressing
5, for the purpose of separating the hitch from the
the. spring 94 toward the support shaft 80, and’ disposing
mounting ball. Thus counterclockwise rotation of the
thexapertures‘70 of the latch-plate 60 into a position to ‘be
‘lever assembly 162 will ?rst free the bolt 122 from its
65 locked engagement with the- latch-plate 60, and con
engaged by lock means indicated generally at 118.
The=lock means 118 includes'a two-piece latch bolt 120,
tinued rotation of said latch-plate will-separate‘ the hitch
seeFigure 3, incorporating a tubular housing 122 having
from the mounting ball. The mounting shaft 58 has ex
extending longitudinally'from the closed end thereof a
lock :pinv 124 extending through a‘ suitable transverse aper- '
tending transversely through opposite ends thereof suit
ture: 126 in the‘ side wall 2801? the coupling member 24; 70 able cotter pins 178 for retaininglthe parts in theirtas
sembled condition. Circumposed about an intermediate
Telescopically'received within‘ the tubular housing 122
portion of the shaft 58 between the outer surface ofrthe
is a:.suitably conformed‘ pin member 128>incorporating an
side 168 of memberv 164 is a suitable torsion or “hairpin"
intermediate 'angular'?ange 130 and'continuing- in a re
spring 180, one end' 182 of which being secured to the
duced diametered' longitudinally extending-pin 132which~
also extends=tlirough\an aperture’ portion 134, said aper 75 latch-plate 60, see Figure 4, the other end 184' of which
2,853,317
5
6.
:engaging a forward edge portion of member 164 accord
inglyv biasing the lever assembly 162 to the position
shown in Figure 4.
.
I
latch-plate for retaining the same in a ?xed position for
locking the mounting ball in the socket portion, an actu
ating lever rotatably supported on the axis of rotation of
r.
The side wall 66 of "the latch-plate 60 has extending
laterally from a ‘rear end portion thereof an abutment
or lug element 186, the purpose of which will be subse-'
quently described.
;
the latch-plate and including an abutment portion en-.
gageable with the latch-plate for pivoting the forward end
thereof toward the socket portion to release the mount
_‘
ing ball therefrom, lock release means carried on the
axis of rotation of the actuating lever for movement
thereon and including means engageable with the lock
brake lever has ‘been actuated so as to apply the trailer 10 means for releasing the same and permitting pivotal
In operation, and with reference to Figure 5, in which
the rod 20 is in the position in which the trailer hand
movement of the latch-plate.
brakes, the handles ‘174 and176 are in the upward posi
tion, the, socket portion 40 and the pin, member 196 are
i
2. in a trailer hitch for use on a trailer tongue to de
wholly above and free ofthe mounting M1114, and the
abutment or lug 186 ‘is ‘directly above and overlies the
tachably connect the same to the vertical mounting ball
on a draft vehicle, a coupling member including rear
rod 20. When it is desired to couple the tongue 16 to 15 upwardly opening and forward downwardly opening re
cesses de?ned by an intermediate transverse’ abutment
‘the ball 14, the handles 174 and 176 are actuated so as
to tilt the latch plate 60 about the shaft 58 to the ex
tent that the abutment 186 rests upon the adjacent por
securing the same on a trailer tongue with the down
tion of the rod 26) directly underneath, permitting the
wardly opening recess extending beyond theterminal end
wall, means engageable with the coupling member for
socket portion 40 and pin member 166 to be shifted 20 thereof, the downwardly opening recess including a
manually over the mounting ball 14 to the extent which
spherically conformed socket portion for receiving a por-v
permits the upper peripheral portion ofv the ball 14 to
tion of the mounting ball therein in spaced relation from
be received within the lower portion of the socket por
the abutment wall, a latch-plate intermediately pivoted
tion 44} and the lower end 108 of the pin member 1&6
on a pivot shaft on the coupling member above the upper
engaging the top of the ball. This partially couples the 25 surface thereof, a support rod extending through an inter
tongue 16 to the ball 14, and‘ holds the trailer against
mediate portion of the forward recess, a latch block
inadvertent separation from the towing vehicle. ‘To
complete the coupling of the tongue 16 to the ball 14,
the operator then releases the trailer brakes by actuating
the trailer hand brake lever so as to effect the with
on the lower end of the support rod in the forward recess
and extending transversely between the abutment wall
and socket portion for retaining or releasing the mounting
30 ball therein in response to pivotal movement of the
drawal of the portion of the rod 20 from below the
abutment @186; _ Then, to complete the hitching of the
latch-plate, lock means in the coupling member biased
toward locking engagement with the latch-plate for re
tongue 16 to the bal1'14, the socket portion 40 isper
taining the same in a ?xed position for locking the mount
mitted to fall downwardly and wholly encompass the
ing ball in the socket portion, an actuating lever rotatably
ball 14, effecting the shifting of the lower end 108 of 35 supported on the axis of rotation of the latch-plate and
the pinmember 71% to the top of the socket portion 40
including an abutment portion engageable with the latch
and further tilting movement of the latch plate 68 about
_ plate for pivoting the forward end thereof toward the
the shaft 58 so as to bring the abutment 186 to apposi
socket portion to release the mounting ball therefrom,
tion blocking the path of movement of the rod 20, the
lock release means ‘carried on the axis of rotation of the
position shown in Figure 4. With the trailer brakes in 40 actuating lever for movement thereon and including means
released position and the tongue 16 completely coupled
engageable with the lock means for releasing the same
to the ball 14, the towing vehicle can freely move the
and permitting pivotal movement of the latch-plate,- said
trailer, but ‘the trailer'brakes cannot 'be applied.
This
latch-plate including an ejectment pin depending from
saves the trailer brakes from being damaged or burned
out.
,
>
The foregoing is considered as illustrative only of the
principles of the invention.v Further, since numerous
a forward end portion thereof for extension into the socket
45 portion for urging the mounting ball therefrom due to‘
modi?cations and changes will readily occur to those
skilled in the art, it is not desired to limit the invention
to the exact'co'nstruction and operation shown and de
scribed, and accordingly, all suitable modi?cations and
equivalents maybe restored to,'fal1ing within thescope
of the appended claims.
downward pivotal movement of the latch-plate in re
sponse to movement of the actuating lever, reverse move
ment of the socket portion onto the mounting ball urging
the ejectment pin out of the socket portion and counter
rotating the latch-plate for locking the same in a ?xed
position relative to the coupling member.
3. In a trailer hitch for use on a trailer tongue to‘
detachably connect the same to the vertical mounting ball
‘What is claimed is:
on a draft vehicle, a coupling member including rear up
1.,In a trailer hitch for use on a trailer tongue to 55
wardly opening and forward downwardly opening recesses
detachably connect the same, to the-vertical mounting
ball' on a draft vehicle, a coupling member including
rear upwardly opening and forward downwardly open
de?ned by an intermediate transverse abutment wall,
means engageable with the coupling member for secur
ing the same on a trailer tongue with the downwardly
ing recesses'de?ned by an intermediate transverse abut
opening recess extending beyond the terminal end thereof,
merit wall, means engageable with the coupling member 60 the downwardly opening recess including a spherically.
for securing the same on a trailer tongue with the down
conformed socket portion for receiving a portion of the
wardly opening recess extending beyond the terminal
mounting ball therein in spaced relation from the abut
end thereof, ‘the downwardly opening recess including a
ment wall, a latch-plate intermediately pivoted on a pivot
spherically conformed socket portion for receiving a. a shaft on the coupling member above the upper surface
portion ofthe mounting ball therein in spaced relation 65 thereof, a support rod extending through an' intermediate
from the abutment wall, a latch-plate intermediately
portion of the forward recess, a latch block on the lower
pivoted on a pivot shaft on the coupling member above
the upper surface thereof, a vsupport rod extending
through an intermediate portion of the forward recess, a
end of the support rod in the forward recess and extend
ing transversely between the abutment wall and socket
portion for retaining or releasing the mounting ball there
latch block on the lower end of the support rod in the 70 in in response to pivotal movement of the latch-plate, lock
forward recess andextending transversely between the
abutment wall and socket portion for retaining or re
means in the coupling member biased toward locking
engagement with the latch-plate for retaining the same
leasing the mounting ball therein in response to pivotal , in a ?xed position for locking the mounting ball in the
movement ‘of the latch-plate, lock means in the coupling
socket portion, an actuating lever rotatably supported on
member biased toward locking engagement with the 75 the axis of rotation of the latch-plate and including an
2,85331'7
7
8
.
abutment portion engageable with the latch-plate for
‘for movement-thereon and including means engageable
cured normal to the pivot shaft, between the converging
ends of the lever elements,‘ forward pivotal movement of
the cam pin urging the forward ends of the levers apart
about the fulcrum portions and-urging the rear ends there
of toward each other for ‘freeing the latch-plate for pivotal
with the lock-rneans for releasing the same and permitting
movement.
pivoting the forward end thereoftoward the socket por
110D‘ to release the mounting ball therefrom, lock release
.means carried on the axis of rotation of the‘actuating lever
‘pivotal movement of the'latch-plate, said latch-plate in
5. In a trailer hitch for use on a trailer tongue to
cluding an ejectment pin'depending from a forward end
detachably connect the same to the vertical mounting
portion‘tliereof for'extension into the socket portion for
ball on a draft vehicle, a coupling member including
urging the mounting ball therefrom due to downward 10 rear upwardly opening and forward downwardly open
pivotal movement of the latch-plate in response to move
ment of’the' actuating lever, reverse movement of the
ment wall, means engageable with the coupling member
soeketportion 'ontosthe mounting ball urging the eject
for securing the same on a trailer tongue with the down
ing recesses de?ned by an intermediate transverse abut~
ment‘pin out of the socket portion and counter-rotating
wardly opening recess extending beyond the terminal
the latch=plate for‘ locking'the same in a ?xed'position 15 end thereof, the downwardly opening recess including
relative‘to-the‘coupling-member, said lock means com
a spherically conformed socket portion for receiving a
prising'a spring‘urged bolt‘extendable laterally from the
portion of- the mounting ball therein in spaced relation,
couplingmember'and'receivable in an aperture portion
from the abutment wall, a latch-plate intermediately piv
of- the- ‘latch-plate.
oted on a pivot shaft on the coupling member above
4; inv a- trailer hitch" for use on a trailer tongue to 20 the upper, surface thereof, a support rod extending
detachably connect the same to the vertical mounting ball
on'a draft-‘vehicle, av coupling member including rear up
wardly» opening and ‘forward-downwardly opening recesses
de?ned by an‘ intermediate transverse abutment wall,
means‘engageable'witlr the coupling member for securing
the'same'on a trailer tongue with the downwardly open
ing-recess extending beyond the terminal end thereof,
the downwardly opening recess including a spherically
conformedsocket‘portion for receiving a portion of the
through. an intermediate portion of the forward recess,
a latch block on the lower endof the support rod in the
forward recess and extending transversely between the
abutment wall and socket portion for retaining or re
leasing the mounting ball therein in response to pivotal
movementtof the latch-plate, lock means in the coupling
member biased toward locking engagement with the
latch-plate for retaining, the same in' a ?xed position for
locking the mounting ball, in the socket, portion, an
mounting ball therein in spaced relation from the abut 30 actuating lever rotatably supported on the axis of rota
ment‘ wall, a latch-plate'intermediately pivotedon a‘ pivot
tion of the latch-plate.andincluding an abutment portion
shaft on the coupling member above the upper surface
engageable with the latch-plate for pivoting the forward
thereof, a‘ support 'rod' extending through an inter
end thereof toward the socket portion to release the
mediate portion of‘ the ‘forward recess, a latch block
mounting ball therefrom, lock release means carried on
35
onv the lower end of the support rod
in the
the axis of rotation of the actuating lever for movement
forward‘ recess and‘ extending transversely between the
thereon and including means engageable with the lock
abutment wall and socket portion for retaining or rcleas~
means for releasing the same and permitting pivotal move
ment of the latch-plate, said latch-plate including a lat
ing‘the mounting vball therein in ‘response to pivotal move
ment of the latch-plate, lock means in the coupling mem
erally extending abutment element for engaging a lon
ber ‘biasedv toward locking engagement with the latch 40 gitudinally reciprocable rod movable responsive to the
platefor retaining'the same in a ?xed position for locking
application and release of the brakes of said trailer
the'mounting‘ball in the socket portion, an actuating
upon which the hitch is mounted and preventing cou
lever-rotatably supported on the axis of rotation of the
pling of the hitch on the mounting ball while the trailer
latch=plate and'including an abutment portion engage
ab'le'with the latch-plate for pivoting the forward end
brakes are applied.
thereof toward the socket portion to release the mounting
ball therefrom, lock release means carried on the axis
of rotation of the‘ actuating lever for movement there
on'and including means engageable with the lock means
detachably connectthe same to the vertical mounting
ball on a draft vehicle, a coupling member including
forreleasing the same and permitting pivotal movement
ment wall, means engageable with the coupling member
of the latch-plate, said latch-plate including an eject
for securingithe same‘on a trailer tongue with the down?
ment'pin depending from a forward end portion thereof
for extension into the socket portion for urging the
wardly opening recess extending beyond the terminal
end thereof, the downwardly opening recess including
mounting'ba'll therefrom due to downward pivotal move
ment'of‘ the latch-plate in response to movement of the
actuating lever, reverse movement of the socket por
portion of the mounting ball therein in spaced relation
from the abutment wall, a latch-plate intermediately piv
tion-onto the‘mounting ball urging the ejectment pin out
of'the socket portion and counter-rotating the latch-plate
I
6. In a trailer hitch for use on atrailer tongue to
rear upwardly opening and forward downwardly open
ing recesses de?ned' by, an intermediate transverse abut—
a spherically conformed socket portion-for receiving a
oted on a pivot shaftton the coupling member above
the upper surface ‘thereof, a support rod extending
for locking the same in a ?xed position relative to the
through an intermediate portion of the forward recess,
coupling member, said lock means comprising a spring 60 a latch block on the lower end of the support rod in the
urgedtelescoping lock bolt extending transversely of the
forward recess and extending. transversely between the
rear-"recess, opposite ends thereof being extendable
abutment wall and socket, portion for retaining or re
laterally through the coupling member in rearwardly
leasing the mounting'ball therein in response to pivotal
spaced" relation from‘ the pivot axis of the latch-plate, the
movement of the-latch-plate, lock means in the coupling
latch-plate including apertured side portions alignable on
member biased toward- locking engagement with the
opposite'sides of the‘ coupling member for receiving the
latch-plate for retaining the same in a ?xed position for
ends of‘the‘lock bolt therethrough, the lock release means
locking the mounting ball in the socket portion, an ac
comprising a pair of lever elements abuttingly engageable
tuating lever rotatably supported on the axis of rota
at‘o-n'e‘endonopposite ends of the lock bolt for telescop
tion of the latch-plate and including an abutment portion
ing'the'same and freeing the latch-plate for pivotal move
engageable with the latch-plate for pivoting the forward
ment'on the transverse pivot shaft, said lever elements
end thereof‘ toward the socket portion to release the
includingjan‘ intermediate ‘fulcrum portion engaged on
mounting ball therefrom, lock release means carried'on
opposite‘sidesrof the rearrecess of the coupling member
the axis of rotation of the actuating lever for movement
and including converging forward end portions above
the pivot shaft of the latch-plate, and a cam pin se 75 thereon and including means engageable with the lock
2,853,817
10
means for releasing the same and permitting pivotal
from the abutment wall, a latch-plate intermediately piv
movement of the latch-plate, said latch-plate including
oted on a pivot shaft on the coupling member above
the upper surface thereof, a support rod extending
through an intermediate portion of the forward recess,
a latch block on the lower end of the support rod in the
an ejectment pin depending from a forward end portion
thereof for extension into the socket portion for urging
the mounting ball therefrom due to downward pivotal
movement of the latch-plate in response to movement
of the actuating lever, reverse movement of the socket
forward recess and extending transversely between the
abutment wall and socketvportion for retaining or re
leasing the mounting ball therein in response to pivotal
portion onto the mounting ball urging the ejectment pin
movement of the latch-plate, lock means in the coupling
out of the socket portion and counter-rotating the latch
plate for locking the same in a ?xed position relative 10 member biased toward locking engagement with the
latch-plate for retaining the same in a ?xed position for
to the coupling member, said support rod including a
locking the mounting ball in the socket portion, an
compression spring circumposed thereon with opposite
actuating lever rotatably supported on the axis of rota
ends engaging the upper wall of the forward recess and
tion of the latch-plate and including an abutment portion
the latch-block for compression therebetween when the
engageable with the latch—plate for pivoting the forward
latch-plate is locked to the coupling member and urging
end thereof toward the socket .portion to release the
the latch-plate away from the mounting ball upon which
mounting ball therefrom, lock release means carried
the coupling member is secured.
7. In a trailer hitch for use on a trailer tongue to
detachably connect the same to the vertical mounting
ball on a draft vehicle, a coupling member including
rear upwardly opening and forward downwardly open
ing recesses de?ned by an intermediate transverse abut
ment wall, means engageable with the coupling member
on the axis of rotation of the actuating lever for move
ment thereon and including means engageable with the
lock means for releasing the same and permitting pivotal
movement of the latch-plate, said coupling member in
cluding transversely aligned apertures in opposite side
wall portions of the forward recess beneath the latch
for securing the same on a trailer tongue with the down
block for receiving therethrough the transversely dis
wardly opening recess extending beyond the terminal
end thereof, the downwardly opening recess including
a spherically conformed socket portion for receiving a
posed shackle of a lock or the like for preventing sep
aration of the hitch from the mounting ball on the draft
portion of the mounting ball therein in spaced relation
No references cited.
vehicle.
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