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Патент USA US2407085

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Sept 3, 1946- *
G. B. LEATHER ET AL I
FOLDABLE STRÉTCHER
Filed MaI‘Gh~27, 1944
_2,407,085
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SePt- 3, 1946»
G. B. LEATHER Er'AL
FOLDABLE
STRETCHER
Filed March 27, 1944
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2,407,085
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Patented Sept. 3, 1946
2,407,085
UNITED STATES "PATENT OFFICE
Wallbanks, Feltham, England, assignors to
General Aircraft Limited, Feltham, Middlesex,
England
Application March 27, 1944, serial No. 528,294
In Great Britain September 7, 1942>
Y
1
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_
2 ‘
r
The present invention relates to foldable
stretchers and stretcher frames.
It is an object of the invention to provide a'v
ioldable stretcher in a convenient, practicable,
simple and strong form, which can be eiiectively
reduced in overall length and wdith without in
any way impairing the strength and rigidity and
general effectiveness as a stretcher.
Í
`Figure 6 "is a detailed end elevation of a leg
support, the nature, function and operation of
which will be `understood from the ensuing de
scription; while
Figure 7 ¿is a fragmentary side elevation to a"
` greatly reduced scale in proportion to the remain
ing figures showing _how either end of the stretch-V „
A particu
lar object of the invention is the provision of _
an arrangement which enables a full-size stretch
er to be folded in such form that it can conven
er can be folded up to provide a back rest so
that a patient can use the stretcher in a sitting
up position.
`
Referring more particularly to Figure 1, the
iently be stowed into a comparatively smally con
improved stretcher includes a main section com--V
prising side rails I I with canvas support I0 con
erably suspended by a parachute, from an air
nected thereto. A handle section is connected
15 at each end of the main section and includes han
The present invention consists in a foldable
dle bars I3 also connected by canvas and con
stretcher frame comprising side rails to carry
nected to the side rails I I by pivots I2. The piv- ,
the stretcher canvas, each side rail having at
ots I2 are transverse the stretcher, one for each
each end a handle pivotable on a transverse axis. p
handle bar and engage the ends of the handle
A sectional transverse stay foldable about a pivot 20 bars with the side rails II, near the ends of the
intermediate its endsis terminally connected at
latter so as to leave deiinite lengths I I’ of the
each end to the handles between the free ends of
side rails beyond the pivots toward the handle
the handles and the pivots connecting the handles
sections. The handle sections each include a
and side rails. The handlesare foldable through
ioldable stay I4 bridging the bars I3 and con
substantially 180° substantially into the horizon 254 nected to the bars I3 by tubular pivots I6 extend- `
tal plane of the side rails without projecting be- , ing at right angles to the plane of the stretcher
tainer adapted and arranged to »be dropped, pref
craft.
.
.
yond them lengthwise, whereas the transverse
stays are foldable to permit approach of the side '
rails for reduction of overall width of the frame.
The stretcher canvas can be secured in position 30.
in any convenient manner and it is preferred that
`
and passing through the bars I3 at points out
wardly of the pivots I2 somewhat less than the
lengths II’ of the side rails. The stay is made
`of two separate lengths pivotally connected, as
the transverse stays shall be adapted and ar
ranged to engage under projecting ends of the
side rails to provide support thereat intermedi
ate the outer end of each handle and its trans 35
at I5', at an intermediate length of the stay by
a member I5 of an angular cross section (L-shape
for example) welded or otherwise secured adja
cent one end portion to one of the stay members
I4 with its vopposite end portion arranged and `
verse pivot.
adapted to overlap the adjacent portion o_f the
l
In order that it may .be clearly understood
other stay member, the freely projected right an
and readily carried into elîect, the invention is
gular flange of the member I5 limiting the play
hereinafter described with reference to the ac
of the stay parts in one direction, substantially
companying diagrammatic drawings, of which: 40 with the 'same eiiect as in a conventional rule
Figure 1 is a plan view of a stretcher according
to the invention shown fully extended both lat
n As shown, the pivotally connected ends of the
erally and lengthwise ready for carrying a pa
stay parts arev secured to the tubular pivots I6
joint.
tient;
@all
Figure 2 is a fragmentary plan View showing
one end of the stretcher seen in Figure 1 in the
process of being laterally reduced in width;
Figure 3 is an inverted view correspondingto ‘
‘
,
‘
on the'underside of the handle bars, and when
45.
the stay members are in extended relation they
each underlie the extended lengths I Il of the side
rails near the ends thereof. Thus, when the han
dle sections are extended the ends of the side
rails II bear on the stay parts t'o aid in support
tion of minimum width with the handles also fold 50. >ing the weight of the patient on the main length
ed over inwardly to reduce the overall length;
of the stretcher, and more securely support the
Figure 4 is a section on the line IV-`-IV of
side rails. It is to be further noted that when
Figure 2, but showing the side rails in the posi
Figure 3 ;
'
Figure 5 is an end view looking on the left--`
hand end of Figure 3;
.
’
the stays are broken at their intermediate piv
ots I5’_ and moved toward the ends of the stretch
55.’. ¿erMthe
respective side rails I I and also the`re-¿
2,407,085
3
4
spective handle bars I3 of each handle section are
moved toward each other and tend to collapse
security for holding the stretcher in the folded
form.
or fold the stretcher and in this movement the
Figure 5 merely adds to the description over
and above that already dealt with, the feature
of providing small supporting feet or legs indi
stay ends ride from beneath the free ends of the
lengths II’ of the side rails, freeing the handle
sections for freer folding over and onto the main
section and having yet another and important
function to be later referred to. The canvas I0
is attached to the side rails II in any convenient
manner, for example by stitching or eyeletingand, in preferred constructions, the canvas ex
tends beyond the ends of the side rails II for
attachment to the handles I3. Where the can
cated in Figure 5 by the reference numeral 2U.
The feet or legs 29 are also seen in Figure 3 and
are provided at the four corners of the folded
frame.
In Figure 6 there is indicated a convenient
form of leg support which may be provided for
use in cases where a leg injury requires that the
leg beA supported with the foot space well above
the foot end of the stretcher. Accordingly, the
vas is so extended it is preferably slotted or cut
away, as indicated at Il, in order to avoid any 15 cross-bar 2l has pivotally connected at each end,
the lateral sup'port members 22 at the foot of
possibility of the canvas being caught up in the
each of which the prong 23 is provided. For
pivots or between the handles I3 and side rails
mounting the leg support it is convenient to en
Il in the folding operation. To strengthen the
gage the prongs 23 in the tubular pivots I6, which
stretcher longitudinally, straps I8 and I9 are pro
vided and it will be noted that the strap I8 is 20 pivots I6 pivotally connect the ends of the trans
verse stays I4 to their cooperating handles I3. It
somewhat longer than the strap I El. Thatasyrn
will be noted from Figure‘ô that the natural width
metry in- regard to the length of the strap is de
between the‘centres of the prongs> 23, with the
liberately devised for a purpose which will later
prongs> parallel readyv for insertion into the tu
be understood in the description with reference
to Figure 4‘ of the accompanying drawings.
25 Fîbular membersV It,l is slightly greater than the
overall~width-between the centres of the pivots,
When it is desired to reduce the overall width
as indicated by the chain line position' of the
and length of the stretcher, the ñrst operation
handle and side rails inthe fully extended condi
is to eiîect the folding of the transverse stay I4`
tion. Such an Larrangement involves .the neces
about its intermediate pivot I5. The stretcher
bearer or other attendant, therefore engages the 30 1sity for engaging ther prongs 23 into the tubular
members`4 I (iYY with the /leg ?supports each'l moved
stay HI` in the vicinity of the pivot I5 and-pulls
from its naturaliposition,A the arrangement being
it outwardly from one end of the stretcher and
such that when mounted the Ylateral supports 22
the lateral collapsing operation to reduce the
of the leg support must take up the position in
overall width of the stretcher frame then pro
` dicated in chain lines in Figure 6.
.
ceeds automatically, as clearly seen with refer
In order to'adapt thel stretcher for use by'sit
ence to Figure 2. It will be appreciated that,`
ting-up cases, the handles I3' at the‘head’end
whereas Figure 2 is fragmentary and therefore
can be lockedin the upwardlyl extendingv condi
illustrates only one end, the same thing is hap
tion to provide a backrest. Toenablethat to be .
pening at the other end, although the respective
done, let it lee-assumed that the stretcher isv al
end foldings need not necessarily be performed
ready 'in the vextended condition shown in Figure
simultaneously.
1. If then it- is required to put the head end vas
Having so effectively reduced the overall width
an inclined back rest, as shown in Figure 7, thel
of the stretcher frame that the side rails II lie
lateral Width of the-»stretcher vframe isfreduced
substantially contiguous with only the thickness
to 'a condition which'is just slightly narrowerthan
of the stretcher canvas I0 between them, the next
that shown in Figure‘Z. In such a position, the
operation is to reduce effectively the overall
folded- transverse stay- I4' clears the ends II' ofV
length which is done by folding over the han
the side rails II just suflicientlyY to'enable> theY
dles I3> at each end until they lie alongside and
handles
--I3 vto=b`elfolded up. One back-support orv
in the plane of the side rails I I.
A point which is made clear in Figureßl is the’ 50 handlesectiOnisthenrased to an inclined posi
tion on thepivotsIZ», and> in- this movement-of
manner in which the stretcher canvas II! is passed’
the handle sectionthe stays adjacent the pivots
through between the side rails II so that the
IIìA are moved into'a plane above the .ends of the
main part of the sheet lies on the underside of
sectionsÀI I’ of theside rails II of the ymain sec
the side rails in the fully folded condition. There
is also indica-ted in Figurle 4 the position which 55 tion. The-stays I4- are then moved into~spread
or operative position to spread the stretchèrand
the straps I8 and I9 can be caused to take. The
the'inclined handle'section permitted 'to swing
strap I8, as was particularly noted in the de
on the pivots- I2 until the stay'ends rest-uponv
scription with reference to Figure l, is the longer
strap and if that part of the strap I8 which
the upper surfacesof the endsIIf of' the `adja
is shown in Figure l in dotted lines be pulled 60 cent’side rails’of'the/-main section. This» holds
the inclined handle section atI adeñnite linclina
out in the folded condition of the stretcher, the
tionto the main sectionfor service-as-aback
slack, due to the fold over of the end portion of
rest. In‘that position the end of thev feet 20 at
the stretcher canvas, is taken up so that the`
the head end line up with the inner end of the»
strap Virtually takes a bowed formation extend 65 handle, as indicated at ISA, to'support oneend
ing between the slots through which it passes
of the stretcher above the ground‘line indicated
in the canvas. The samething can be done in
by the letter G.
regard to the strap I'9, but being of lesser length
To provide the- ideal of lightness, the side rails
the bowed formation produced by the'strap I9
II, the handles I3, the transverse stays I4, the
is not so large. Nevertheless, if the` strap I8 be 70 feet 20 and the leg support where such is provided,
wrapped round the folded stretcher and engaged
are preferably formed of light alloy box section>
through the loop I9, as shown in chain lines, the
hollow members, but it is in fact quite practica
straps can vbe used to provide'not only a con
ble for the purposes for Which the foldable
Venient carrying handle with the stretcher in theV
stretcher is provided to form those'members from
foldedform, but also to provide'somefrneasure of 75 ` hollow box section steel. The' canvas vII) may beY
2,407,085
6
5
stay bars when aligned to space the side rails and
detachable. The straps I8 and I9, which are
largely optional, can be attached to the canvas by
handle bars and when moved on their interme
stitching or in any convenient manner and, al
diate pivots to move the respective side rails and
though preferably adapted and arranged to pass
the respective handle bars toward each other, the
through slots to leave a substantial portion both Ui ends of the stay bars when aligned underlying
and contacting with the adjacent ends of the side
above and below the canvas, there is no reason
rails to support the main section when the main
why the straps should not be provided wholly
section and handle section are in substantially
above or wholly below the canvas. The feet like
horizontal stretcher-forming alignment.
wise are largely optional.
5. A stretcher including a main section includ
What we claim is:
ing spaced side rails and a handle section includ
1. A foldable stretcher frame, including side
ing spaced handle bars, a canvas connected to
rails, a handle pivotally connected to each end
the side rails and to the handle bars, the handle
of each side rail on a horizontal pivot for swing
bars being swingingly connected to the side rails,
and stays pivotally connected at their ends to the
ing to operative positionsbeyond the ends of the
side rails or to inoperative positions within the
lengths of said side rails, a canvas section se
cured to said side rails and to said handles, a
transverse stay at each end of the lateral side
rails and each comprising two parts pivotally
connected, the outer ends of the stays being piv
handle bars and each made up of two bars piv
otally connected at an intermediate point to cause
the stay bars when aligned to space the side rails
and handle bars and when moved on their in
termediate pivots to move the respective side rails
and the respective handle bars toward each other,
the ends of the bars of the stays underlying and
contacting the ends of the adjacent side rails
when the stays are extended and the main and
handle sections of the stretcher are in substan
tial alignment and moved free of such contact
otally connected to the handles at the respective
ends of the frame on vertical pivots, said canvas
being cut away to avoid canvas gripping adjacent
the pivotal connections of the handles, the han
dles when in operative position providing with the
lateral side rails an extended stretcher frame and
when in inoperative position reducing the overall
length of the frame, the stays when moved on
when the stays are moved on their intermediate
pivots to collapse the stretcher, a handle section
being movable into inclined relation to the main
their inner pivots reducing the width of the
frame.
30 section when the associated stay bars are free of
the ends of the side rails, the inclined position
2. A construction as defined in claim 1, where
of a handle section carrying the ends of the stay
in the handles and side rails are pivotally con
bars to overlie and contact the ends of the adja
nected by tubular pivots, and wherein a foot rest
cent side rails to prevent movement of the in
is provided for the frame, said foot rest includ
ing a cross member and depending members con 35 clined handle section in one direction.
6. A stretcher including a main section of in
nected to the cross member, said depending mem
dependent side rails, a handle section of inde
bers having terminal ends to seat in said tubular
pendent` handle bars pivotally connected to the
pivots to support the cross member in spaced re
side rails, and. a stay having an intermediate joint
lation above and transverse the frame.
to permit extended or folded positions of the stay,
the ends of the `stay being connected to the han
dle bars in such relation to the adjacent ends of
the side rails that when the handle section is
swung upwardly in a substantially similar plane
‘ ' with the main section the ends of the stays will
underlie and support the main section, such stay
ends when the handle section is at an inclination
to the plane of the main section being in a posi
tion to overlie and contact the adjacent ends of
50 the side rails to maintain the relatively inclined
position of the handle section, and canvas carried by the side rails.
3. A construction as defined in claim 1, wherein ~
longitudinally extending straps are attached at
their ends to the canvas, with their intermediate
portions free of connection with the canvas,
whereby when the structure is reduced in length
and width, the free portions of the straps may be
drawn upon to take up slack in the straps, to
form a tie for the frame, and to mutually inter
engage to form a carrying handlel
4. A stretcher including a main section includ
ing spaced side rails and a handle section includ
ing spaced handle bars, a canvas connected to the
side rails and to the handle bars, the handle bars
being swingingly connected to the side rails, and
stays pivotally connected at their ends to the han
dle bars and each made up of two bars pivotally
connected at an intermediate point to cause the
>Cì'rEORG‘rE BERREIIL LEATHER.
WILLIAM HASTINGS WALLBANKS.
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