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Патент USA US2105210

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Jan‘. .11, 1938.
w. A. BERG
Filed Jan. 31, 1-936
2 Sheets-Sheet 1
Jan. 11, 1938. ‘
w_ A_ BERG
Filed Jan. 31, 1938
2 Sheets-Sheet 2
W/Y/fum A. Ber
Z8”, 5%, F»
Patented Jan. 11, 1938
jWAREHQUSTE ‘trailer
‘ cwilliam'vA. Berg, Yakinia, Wash. '
"applicant may 31, .1936, serial Nm 61,656
This invention relates .towarehouse trucks with ing arms are formed to a. relative hishape'ingplan
the object thereof, generally “stated, beingpto icon?guration ‘to provide vtrans}(er?ely ‘disposed
provide an improved truck of relatively simple {slide arms l3 which project‘fcirwardly" at "outer
and especially durable construction capable of endsof the same'in shank elements I 4, said shank
handling the movement ofg‘fruit boxes andthe
like more, advantageously than
been ‘possible.
in More particularly.l-stated,v objects of the irres
ent :invention are to pprovide a warehouse truck '
1.0 in» which ;the clamping arms are-1aiiorded-.a;ma—
:terially wider range of --movement-\than has;;here
.tofore ‘ been ‘ possible‘ and to obtain :a t ‘more ‘; emit:
tive ‘control v‘of "the locking meqhanismhy which
i the clamping : arms are ‘restrained {from ‘ expand
ing ‘:beyond;positioned:clamping > points; -
elements terminating'in gdownwardly ,offasetT?n- fi
gers J5 which‘ project inwardly.
Designed ‘to’ -
effect a wedge action asfthe samejare forced
under a pile ofboxes, ‘the’ ?ngers act to :tilt the
,boxes rearwardly against the ?oor of the truck.
'If'hetsl'de arms 13 I ‘form to a relative‘T-shape l0
in cross-.secti‘onand provided'as a track therefor "
,is {a ‘channeled ‘_,bar 16 ekt'endingth‘e width‘ of
the‘ truck and boltably or otherwise ‘rigidly ‘se
pured-iatjthe lower end of the lai?tfér. "To?receive
id 'bar‘=l;6,,the-;frame membefrs‘l ‘zaregsuitably
:tI'he foregoing;rtogetherzwith :further and :still ‘ notched
and, above :the- bar in the ‘plane V of" the
‘ ‘more particular ‘objects and advantages,‘ 1wil1¢be
(‘come apparent in ;;the :course :of'rthe - followingide
taileddescription and @claims, :the L invention-con
sisting in lithe ‘znovel ~ construction,- adaptation,
_. and combination cofrrparts ‘ hereinafter "described
_In=the drawings:
,_ .=Figure 1: isuia aside irelevational? vievv tindicating
‘the truckvasvthe-asame is tapplied;:imtiltingaaiplu
rality ofwifruit gcboxesw preparatory r150" moving rthe
p1 .
i2‘ ‘is ‘an “enlarged: ,detailwafront’ {elevation
.slide‘arins, provide openings‘ accommodating ex
tension of the arrns.
~-While Ypriqr truck pconstructionsv ‘have utilized
V_;nun1”e13ous 'arrangernentsjfor regulating the ‘spread 20.
of the Vclamping?arrn's, isulostaritia‘llyv all ofjsu'eht?“
r-mechainisnishave constitutedtaitoggle ‘structure,
.‘qrthe particular disadvantages of ‘which ‘are anlex
‘:??IIQl’l'lBlYilil'Ili?Gd- spread- vvhere e?ective “leverages,
-may;_ibelo__lotained. Prior truck‘!arrangeinents‘jare 25
wf-urtherfolojectionablein that, ;.so’ far
I 1am?”
wavvare, ;;the ‘mechanisms 1 employed ‘to -.lock "the
arms “ against vlooxgii‘ri?‘uencedi spreading have 1 re
: quiredzhand mheseaed~>where?iis5éharacter “of
to‘ “ expose ~~the operating rmecha-nism, ,ifulltand treleaser-is emplQy-qdrwith,aifoo?dpemté? Pedal 30
' Tzdott'ed lines 1indifcating‘ithescontracted‘ endemi
a vfor spreading-the- arrns, breakage "frequently 'oc
ifcursifrornlartendency of operators toiap'ply ‘foot
‘ ~1Fig-Y: 3m~isga detailglongitudinallverticalgseqtiqn F pressuren-inxl-adw?ce:0f handmleasé
- ;In~overcom_ing_-the 'ahove'objeetions', I provide
Fig. 4 is an enlarged detail horizontalsection a a; sector‘ arrangement inwhich a {disc member TI 1 35
taken; on‘the ‘line 54-141. qof Eig ~12. -is-;mounted~ahove thelsliding arms l3, a vlongi- '1
tended positions-anthe- jaws;
Fig. ;5 g’ is 1 an enlarged ;detail;iloneituciinalilver
11.0 ‘@Qhtmkthe P-QSition (lithe clamping armsgthe
\ tudin'ally {disposed horizontal ‘' shaft , I B ‘ operating ’
as an
therefor‘withthegvshaittbeing formed
‘ sasvafstud a‘ extension froma_‘lo1ock [9 holtagbly se
cured to the underside of the?oorplate "I |'.' "Pro- 40
vrvidedwat relative diametrically opposite [sides of *1‘
; Eig- ?tist-agdetail transverse vertical sectionroln e‘ s
‘sc‘lrnember are ‘vvliist‘llpins' ,‘ 2'0 1 for ‘piv'o'tally
.rec rig connecting armsy2l ‘I and ‘22 which," at
‘ : Thetruckiillustratesi,zemplsivsi:ezirameinclud
éingil'aterally-epaced longitudinal. member
‘ vlingerends of which tonstitute handles qr
‘ I‘ ingrthetrucktand the loyverends rec
lets‘ 8jwhichjareiforined ,tomrov e e
ng rack
tev-‘endsgengage the innen terrnini'jj'of
res'pe tivez-lslide arms ‘I3. ‘As indicated,‘ each‘bf 45
zjeo‘nnécting farms cross‘ the I vertical planeqfof - ‘ *
[the disc .‘va‘i‘iistvvhendisposed in’ fully retracted
positions-with; the wrist I pins ibeing " located such
‘theniovernent of the samei'i'srelativelyfhori
suitably mounted on the axle to "dispose,- e‘. same “?that
zontal whereby to obtain a substantiallylqqnts‘tant 50
[in spaced relation, . . '‘ overlying the; PDDB eag'éf'or leveragethrough the range‘ ‘of movement ‘of:ithe““
‘the r‘ramammbérm m1 extending hetwee the clampingarms. i, For operating the‘ disc‘ m inber,
same 151a 'bnltalglyfco
‘. 2'55
‘l a peweniarnils engages a wrist" .‘
liiriven“ lndiiofflithe arm :bein en aged?bylathrust
on vertical rods 26 supported by a rigid frame
member 21 with manual elevation of the same
being afforded through depression of a foot lever
28 fulcrumed, at 29, to a swinging link 30 carried
by the truck axle. To prevent the thrust block
5. In a warehouse truck, in combination with a
wheeled vehicle of the character described, a
pair of opposing box-clamping arms provided
with extensions therefrom supported by the
vehicle for transverse sliding movement, power
from moving downwardly following depression
of said foot lever, I provide a rack 3| the teeth
of which operate to receive a pawl 32 pivotally
carried by the block 25 and in automatically dis
10 engaging said pawl in response to and to ac
commodate' manual depression vof the thrust
transmitting means connected with said exten
sions for actuating the same inwardly and out
wardly as respects the vehicle, power-applying
means therefor comprising a pair of foot-actuated
pedals operated independently‘ to' respectively
effect said outward’ and inward movement, means
operating to lock said sliding extensions of the
clamping arms against box-influenced outward
block at the upper end of the same and engaged ,
movement only, following the actuation of the
by a link 34 with the pawl. Opposing said pawl arms ‘to a selected clamping position, and means
.operating ‘automatically under the in?uence of
engagement with the rack teeth is a spring 35. pedal-actuated outward movement of the sliding
The operation should be clear fromv the fore
extensions for releasing said locking means.
going, it being my intention that the invention be
6. In a warehouse truck, in combination with a
limited only within
wheeled vehicle of the character described hav
20 nexed claims.
ing at its lower end a track-forming channel of
What I claim, is:—
an inverted-T form extending the approximate
1. In a warehouse truck, in combination with a width of the vehicle, and a pair of opposing box
wheeled vehicle of the character described, and a clamping members of relative L-shaped plan
block, a foot pedal 33 is pivotally carried by the
pair of opposing clamping arms supported there
by for span-regulating movements transversely of
‘the vehicle, rotary means, coupling means con
necting said rotary means with the clamping
arms for expanding the clamping arms in re
sponse to movement of the rotary means in one
direction of rotation and for retracting the
clamping arms in response to movement in the
‘opposite direction of rotation, means for actuat
ing said rotary means in selective directive rota
tions, means by which the arms are automatically
locked in selected span-regulating positions, said
35 automatically operated locking means permitting
free contraction movement and preventing ex
pansion movement of the arms only, and means
acting to release said locking means simul
taneously with the operation of said means by
4.0 which the arms are expanded.
2. The structure as de?ned in claim 1 wherein
said clamping arms are slidable in a rectilineal
con?gurations one arm of which is of an inverted
T cross sectional form for tracking engagement
in the channel, the other arm of the respective
members projecting forwardly from opposite sides
of the vehicle and providing a terminal ?nger
adapted to engage under the lateral edges of the
boxes, means connected with the tracking arms
of the clamping members for collectively actuat
ing the arms outwardly and inwardly, a pair of
foot pedals operatively connected with said means
and operating independently to respectively move ; .
the arms outwardly and inwardly, pawl-and-rack
mechanism acting to lock said arms against box
infiuenced outward movement beyond va selected
clamping position, and means operating auto
matically in response to pedal-actuated outward
movement of the sliding arms for disengaging the
pawl from the teeth of the rack.
7. In a warehouse truck, a wheeled vehicle of
the character described having ‘at its lower end
a track-forming channel of an inverted-T form"
plane, said connecting means comprising wrist
pins carried by the rotary means in o?-set: rela ‘extending the approximate width of the vehicle,
tion‘ to the axis of rotation of the Same, and
connecting arms between said wrist pins and “the
clamping arms for linking the same together. '
3. In a warehouse truck, in combination with a
wheeled vehicle of the character described, and" a
50 pair of opposing box-clamping arms supported
a‘ pair of opposing box-clamping members pro
viding slide arms of an inverted-T cross sectional
form received for tracking engagement in said
channel, the medial webs of said T-members pro-». .50
'jecting through the throat of the T-channel, and
means carried by the truck and operatively en
thereby for contraction and expansion move
ments transversely of the vehicle, rotary control gaging said webs for collectively actuating said
sliding arms outwardly and inwardly in the chan
means having crank connection with the clamp
.ing arms, foot-operated pedals actuated inde
pendently for transmitting opposite directive
rotations to the rotary means in selectively con
tracting and expanding the arms, and pedal
released lock mechanism for securing the arms
8. In a warehouse truck, in combination with
a wheeled vehicle of the character described hav
ing at its lower end a track-forming open-end
channel of an inverted-T form, a pair of oppos
in adjusted positions.
ing box-clamping members of relative L-shaped
4. In a warehouse truck of the character de
scribed, the combination of a pair of opposing
the same is of an inverted-T cross sectional form,
box-clamping members supported for movement
transversely of the truck whereby to expand and
plan con?guration of which one arm of each of
‘said T-shaped arms of the members being adapt
ed for introduction to-the channel to locate the
contract the members, a pair of foot-actuated 7 other arms of the same at opposite sides of the,‘v
devices having operative connection with the vehicle to project forwardly therefrom for clamp
ing the box therebetween, and means carried by
' . clamping members and actuated independently to
_ contract and expand the clamping members, and the vehicle for imparting collective movement
means for locking the clamping members in to the tracking arms of said clamping members
selected contracted positions against box-in
70 ?uenced expansion movement only, said foot
' actuated device for expanding the clamping mem
bers being provided with means for releasing the
outwardly and inwardly of the channel, said"70
~ means comprising a rotative disc member, wrist
pins .carried thereby at relatively diametrically
opposite sides of the disc member, connecting
locking means simultaneously with foot-actuation _ arms linking, the wrist'pins with inner ends of
expansion movement.
the tracking arms, a vertically movable thrust 75
r 2,10_5,21o
ported for movement longitudinally of the frame
block, connection between said thrustrblock and
the disc member for operating the disc member
in converse directions of rotation responsive to
the relative directions of movement of the thrust
block, a rack bar, a pawl carried by the thrust
block for locking the thrust block against move
ment in one direction of reciprocatory travel, a
fulcrumed foot lever having connection with the
thrust block for actuating the thrust block in
10 the opposite direction of its reciprocatory travel,
said lever-in?uenced travel of the thrust block
actuating the disc member to force‘ the tracking
arms inwardly, and foot-actuated means for si
multaneously disengaging said pawl from the
teeth of the rack and actuating the disc member
to force the tracking arms outwardly.
9. The structure as de?ned in claim 8 wherein
the travel of the wrist pins is in an arc passing
through the vertical plane of thedisc‘axis and
in which the opposite extremes of the arcuate
movement lie approximately equidistant from
said vertical plane whereby to obtain relatively
uniform leverage upon the tracking arms
throughout the range of movement of the latter.
10. In a warehouse truck, in‘ combination with
a truck frame, and a pair of opposing clamping
jaws slidably supported for movement toward
and from one another, a member slidably sup
and a power-transmitting member common to
each of the jaws and operated by said slide mem
ber for regulating the span of the jaws, and means
by which said slide member is actuated longitu
dinally of the framedcomprising a pedal-oper
ated toggle structure, said toggle structure con
sisting in companion upper and lower arms the
upper of which is coupled to the slide member
and provided at its opposite end with an integral
pedal and the lower of which is fulcrumed at its
lower end about a ?xed pivot and at its upper
end pivotally connected to the pedal-forming
arm at the approximate mid-length of the latter.
11. A warehouse truck comprising, in combina 15
tion, a pair of opposing clamping arms supported
for span-regulating expansion and contraction
movements from and toward each other in recti
lineal planes, mechanism for e?ecting said move
ments comprising a pivotally mounted means 20
common to each of the arms and having inde
pendent crank connection therewith, and manu
ally-controlled means slidably supported for
movement in a rectilineal plane acting to trans
mit movement to the pivotally mounted means
for operating the cranks to regulate said clamp
ing arms.
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