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Патент USA US2127566

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Aug. -23, 1938.
N, MALLoY-BREHUNOFF
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Filled March 22, 1955 _
l@4 68
2 sheets-sheet 1
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5737484
.'j > f '
‘
2,127,566
ARTIFICIAL LIMB
„ e4.MM;
_ BY
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ì
I
l MWÓRNELS
Aug. 23,193.8.-
` N. MALLoY-BREHUNOFF
2,127,556
ARTIFICIAL LIMB
Filed MàI‘Ch 2.2,v 1935
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~
2 Sheets-Sheei 2
M ATTQRNEYS.
Patented Aug. 23,
'i ,12,127.566
UNITED- vs'|¿î;¢\."rl~.=:s PATENT OFFICE
8 Claims. - (ci. 3_2) '
‘ This invention relates to new and useful im
provements in artificial limbs and has for an ob
ject to provide‘an artificial limb including cer
the opposite sides of the thigh I0 as at I'Ifand
such plates extend toward tli'e lower end of the I
thigh and adjacent theirupper ends are pro
tain adjustable connections whereby the limb may ~ vided with a set of vertically lspaced tapped open
lbe adjusted to give the greatest comfort to the ings |8 and toward its lowerend each plate is pro
It is also an object to provide an artiiicial limb
that willpermit walking and using of the limb
to better eifect than such limbs now available.
10
`'I'he-v invention also includes improvements in
the harness for »attaching or securing an arti
ficial limb to a-wearer, improved connections at
the knee joints of `artiiicial limbs, and improved
foot and calf connections for artificial limbs.
Other objects and advantages will become ap
parent _from aconsideration of the> following de
tailed description takenl in connection- with the
accompanying drawings wherein satisfactory em
20
The knee joint between the thigh It and cap _
|| is generally designated 20 -and includes upper
parts 2| and lower parts 22.` At theirl upper ends
the parts 2| are provided with headg-like enlarge 10
ments 23 whereby the parts are somewhat 'I'.
shaped and such head-like portions are each pro
vided with a series of horizontally spaced open
ings 24. In spaced relation to the heads 23 the
parts 2| are each provided with a series of ver
15
ticallyspaced openings` or perforations 25. Bolts
26 and A2`| are passed through selected ones of
the upper and lower sets of openings 24 and 25
bodiments'of the‘ invention are shown. However, respectively to secure the upper knee joint parts
it will be understood that the invention is not, 2 | vto the 'mounting‘and adjustment plates >I6 and
limited to the details disclosed but includes all ' through such plates to the thigh I0. 'I'he bolt 26
such variations and modiilcations as fall within is passed through a selected one oi' the openings
>the spirit of the invention and the `scope of the 24 in the part >2| and is threaded into the se
appended
25
claims.-
In the drawings:
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A
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lected opening I8 in the plate Ii.
g
Fig. 1 is a front elevational view of an artiiicial
limb adapted to be used when 4the wearer’s leg
vhas been amputated above the knee joint, parts
30
5
vided witvh a tapped opening I9'.l
being broken away in the view to show features
of construction;
1
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'
, Fig. _2 is aïside elevational-view of the limb of
Fig. 1 with parts broken away;
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Fig. 3 is an enlarged detail view showing the
construction at the knee jointand particularly
35 showing a locking means employed; '
Fig. 3a_ is a detail side view -of a catch for ren
dering the lock ineffective;
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Flg.`3b is‘a top plan view thereof ;
Fig.- 4 is a top plan _view ofthe foot of Figs.
1
and 2;
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When _the bolt 20 is in position it determines
which of the'openings 28 in the part 2| the bolt
21 is to be passed through in order to thread into
the opening Il of the plate Il. lThe bolt _2'|_may
beilrst screwed into place after which the thigh _
' ||| may be adjusted and then the bolt 26 screwed so
into place. By the dotted line positions of the
thighv Il in Flg.-'2 it is .shown that the thigh may
have various positions of adjustment 'relative to`
the upper parts 2| of the knee'joint. The thigh .
may be adjusted vertically-and it may also be 35
tilted more or less so as to be given that relation
to the calf I |v which is most comfortable to the
wearer.
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»
The lower kneel joint parts 22 are disposed
against the inner surfaces of the'cali' || at dia
metrically opposite sides thereof and are secured
in place by screws 2l. Such parts extend above
Fig. 5 is a front. elevational view showing the
harness vemployed for securing either the limb of
Figs.'1 and 2 to the wearer; and
- the upper end of the calf and their upper end
Fig. 6 is a rear elevational view showing the portions 2l are bifurcated. The upper parts 2| Í harness in’ use:
»
1
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l
oi' the knee joint extend below the lower end 45
_ Referring in detail to the drawings, and. at-first of the thigh> I0 and are received in the bifurcated
particularly to Figs. 1 through 4, the artificial , portions 28 of the part 22 and such parts 2| and
limb of such iigures as yshown includes a thigh4 22 are.hingedly connected by pin bushings 20
portion I0, a calf |I,»and'a¿footv I2. This-limb into which are threaded the securing screw 2|.
50 is for use where theleg of the wearer hasbeen
' ' With the described construction it will be appa
amputated above, the kneef'joint and the thigh- - rent that the thigh I! and calf || are hingedly
I0 is a socket-like construction including a metal >connected and that the thigh may be adjusted
shell I 3, a felt pad I4 against the inner side of
said shell vand a leather innerv lining I5. Joint
relative to the calf s_o that the thighl will occupy
that position which will give the most comfort
holders andladjustment plates I6 are riveted to f to the wearer, and also'the lower part of the leg
55
2
2,127,566 '
may be swung backwardly when the wearer sits
down, or at any time desired.
At the front side of the artiiicial limb the space
between the lower end of the thigh I0 and the
upper end'of the calf || is closed by a knee cap
plate 32. Screws 33 secure the upper end portion
of the plate 32 against the inner surface of the
lower end portion of the thigh and such plate ex
tends for a substantial distance into the calf ||.
This knee cap plate is formed of fiexiblespring
metal as for example bronze and when the arti
ñcial limb is bent the lower portion of the plate
slides along the inner surface of the cali || and
the plate bends and maintains the space between
the front portions of the thigh and calf closed,
iiexing and functioning in the manner of a
natural knee cap.
y
member 44. y At such times the cylinder ?will
be positioned as shown by the dotted line in Fig.
2. To again straighten the leg the wearer may
shake or snap it to have the calf I | assume a
straight position with respect to the thigh Il), and
when this is done the lower endof the cylinder
is moved backq onto the horizontal arm of the
bracket 41 by means of a spring 52 which nor- '
mally acts to maintain the cylinder in the last
described position.
10
Spring 52 as shown is formed from a single
‘length of wire bent intermediate its ends to pro
vide a pair of armsand a connecting portion 53
and the spring is arranged with this connecting
portion bearing against the forward lside of the 15
cylinder 44. Intermediate their ends the arms
of the spring are bent to provide coils 54 passed
over the extending ends of the bushing 40 and
Í then'the free ends 55 of the varms of the spring
bear against the ears 31. A bolt having a rela
20 tween the thigh i6v and the calf || when the
tively large head 56 is passed through the bush
wearer is walking on the artificial limb. A sub
stantially semi-circular member or plate'35 has ing 4|) and a relatively large nut 51 is threaded
its end portions secured to the upper parts 2| of onto the bolt and the head 56 and nut 51 provide
the knee joint 20 as by rivets 36 and at the inner means to prevent the coils 54 of the spring from
moving off the ends of the bushing. With this
25 side of said plate are a pair of ears 31 secured by
arrangement it will be apparent that the spring
rivets 38 and extending inwardly and down
wardly with respect to the plate. An eye bolt 39 is' constantly tending to move the cylinder 44 in a
has its head disposed between the ears 31 and a . direction to push the cylinder against the inner
bushing 40 vpasses through thevears and‘eye bolt surface of-the rear wall of the calf | I.
The pull cord 5| is carried outwardly/against 80
1
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30 and pivotally mounts the eye bolt. '
On the lower end of the’eye bolt 39 there _is thev under side of a pulley 58 mounted between a
threaded a push rod 4| comprising a tubular pair; of plates 59 which plates are supported by
member into which the eye bolt 39 threads and in' tubular members 60 extending across the calf- Il
transverse section the exterior of this push rod is in vertical spaced relation to one another and
A locking means generally designated 34 is
provided to preventfree pivotal movementlbe
35 non-circular preferably being square. A counter
or lock nut 42 is threaded oñto the eye-bolt 39.“
The lower end of the push rod 4| passes through
an opening in a bushing 43 which bushing is
threaded into the upper end of a cylinder 44.
Below the bushing 43 the push rod is provided
with an enlargement or a head 45 o! such diam
eter as to be'incapable of passing> through the
opening in the bushing 43 and the opening in
such bushing is shaped to conform to the exterior
shape of the push rod so that thelatter has no
turning movement in the bushing.
Within the'cylinder 44 and bearing at one end
against the head 45 of the push rod is a spring
46 constantly exerting an effort ag‘ainst the lower
end of the p‘ush rod. Obviously, the push rod
may be adjusted on the eyebolt 39. and the bush
secured in position by the intermediate pairs of
screws 28 used in securing the lower parts 22 of
the knee joint to the calf. 0n passing under the
pulley 58 the pull cord 5| is~carried upwardly as
shown in Fig. 2 and passes out of the artiiicial -leg
through an opening 6| -in the lower portion of
the thigh Il).I The manner in which the outer or
upper end of the cord 5| is secured will later be
set forth.
`
If~ desired a catch may be provided as shown
in Figs. 3a and 3b whereby this lock may be
' prevented from moving to locking position. For
example, when driving a car it would be unde
sirable to have theleg lock in straightened po
sition after pushing downwardly on the brake
pedal as it might be necessary to unlock the
~joint ‘before the brake could be released. This
ing 43, owing to its threaded connection to its ` latch may take various forms but as shown com-.
cylinder 44, is adapted to adjust the tension of
the spring 46 since the bushing may be threaded
prises a catch member 41a, pivoted to the bracket
l41 at 41b‘. A spring 41o is secured to the catch
at 41d and to the shell |'I at 41e. This'jcatch
- more or less into- the cylinder as desired by turn
ing of rod 4| by a suitable wrench, and it may . may be shifted to a position vover the bracket
then be locked by nut 42. A small bracket 41 is
41a as shown in full lines when it will hold the
secured against the‘inner surface of the rear wall
lock 44 oii‘ the bracket as shown so it can not
lock. If the catch Ais swung to one side as in
of the calf Il as by screws 48. When the arti
flcial limb is being used the lower end of the cyl.
inder 44 bears against the horizontal arm of the
bracket 41 as shown in Figs. l and 2 and the
spring 46 provides the necessary cushion between
the cali’ and thigh and produces the oscillation
- of the thigh.
dicated in dotted lines it will not prevent mem
ber 44 going over thetop of the bracket and lock- ,
ing as indicated above. In these movements the
spring 41e passes over the pivot 41b and so holds
the catch in either position. The catch may be
provided with a finger piece 41j or an opening 65
41g which may be engaged by a finger to move
About the lower end portion of the cylinder 44
is an unlocking or releasing ring 49 prevented it to either position.
Calf Il and foot i2 are connected by an ankle
from sliding oiî the cylinder by a protecting or
stop ring 50. Connected with the unlocking ring; joint generally designated. 52 and which joint
49 is a cord 5| adapted to be pulled or drawn to comprises upper parts 63 secul‘ed against the in 70
move the lower end of the cylinder 44 oil the
bracket 41 so that -the artiñcial limb may pivot at
the. knee joint when the wearer is sitting. It may
also be released by pressing inwardly with a
iinger of the wearer’s hand against the back-0f
ner sides of the lower portion of the calf Il as
by> rivets 64 and lower parts 65 disposed in chan
nels 66 and secured against opposite sides of a
base 61 of the foot as by bolts 68 passing trans
versely through such base. The lower ends of 75
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2,127,563
ì the parts 63 are received in the'bifurcated upper
lent pairs of the -openings |40 in_the beltÁ where
by the pulley |43 will be mounted to give the
end portions of the parts 65 and bushing pins
10 are passed through the overlapping end por
most convenience and comfort to the wearer. A .
strong cord of leather or the like |45 is'passed
over the pulley |43 and then down under the
pulleys 85 and 66 and the ends of the cord are
nected.'
Y
brought up at the front of the wearer and con
In addition to the base 41, which is prefer
nected with a buckle |46 secured- to the belt |34
ably a metal casting, theA foot |2'includesa 'felt as by a tab |41. This same arrangement is as
toe 12 and beneath the base and the toe there' ` above suggested used for securing either form of 10v
is arranged the shock absorbing sponge rubber lthe artificial limb to the body of the wearer. The
pad 13.v Screws 14 are preferably- used for se
elastic |4| servestokeep the cord |45 taut and
tions and screws 1| are passed through the joints'
to secure the parts. From this it will be -apparent
that the calf Il and foot |2 are pivotaliy-con
curing the toe 12 to the base 61. At the under
side of the pad 13 there is arranged a leather
sole 15 and it will be understood that a regular
shoe may be" worn on the foot. Preferably the .
foot I2 includes a leather casing or cover 16.v A
f’ plate or closure 11 is arranged in the 4lower end
of' the calf || and is preferably welded -therein
as at 18. Arranged lin the base 61 are a pair'
of similar springsJQ and 80 and the spring 18
is arranged forwardly` of the pivot of the ankle
joint while the spring 80 is arranged rearwardly '
\ of said pivot.
~
The upper ends 'of these springs are secured
to the plate 11 as at 8| and the lower end of the
spring 19 is 'engaged by an adjustable screw 82~
while the lower end of the spring 80' is engaged
to hold theV thigh portion ofthe artificial limb a1
ways against the stump of the wearer’s leg but
permi-ts> free movements of the' wearer’s body 15
and leg in all directions whether he is standing
orsitting.
When the leg of Figs. l and 2 is being used
it is preferred that the pull cord 5| of the lock
ing means be connected with` the .supporting
buckle 46. With such an arrangement a user
may by raising his shoulder exert a pull on the
cord 5| so as to draw the lower end of the cyl
inder 44 off the bracket 41 and `thus unlock the
knee joint. Attention is Idirected to the fact that
the' artificial limb of the present invention is en->
tirely free of wood, being made of metal, felt
and leather. It is preferred that a light strong
by a similar screw 83, the` 'said screws‘being
metal suchas an aluminum alloy be used in the
threaded through the bottom wall oi' the base
61. The cushioning pad 18 and the leather sole
construction of the metal parts.
_
Having thus set forth the _nature of my in
15 are provided withopenings 84 giving- access . vention, what‘I claim is:
to the lower ends of the screws 82 and'88' where- '
by said screws may be adjusted. By adjusting
said screws toïdecrease or increase the tension
of the springs 19 and 80 the ,position of the toe
ofthe foot relative to the calf || may be care
fully regulated. 'I‘he springs may be independ
ently adjusted since there is a separate regulat
ing screw‘ for each spring.
.
A harness later to be described is provided for
securing the artificial limb to the. wearer and the
thigh portion I0 carries the means by which such>
harness connects with the limb. ' This means in
,
l. In- an artificial leg construction, a thigh
section, a‘cali' section, a knee joint connecting
e
said sections comprising a pairof. upper parts
extending at the sides of the thigh section, a pair
of lower parts secured tothe calf section and
pivoted to the said upper parts to permit relative
pivotal movement between the thigh and calf sec
tions during normal operation, and adjustablemeans connecting the thigh section to said upper
parts, said means being constructed and arranged
to permit angular adjustments of the thigh sec
tion relative to said upper parts and to perma
cludes pulleys 85 and 86 located at the outer nently secure the section and said parts together
sides of the thigh I0 and of which one is carried in different relative angular positions and hold
by each o_f the upper parts 2| of the knee joint. them against relative movement during normal
'I'he pulleys are secured in place or clamped use of the leg. l
‘
against the parts 2| by plates 81 secured to the 2. In an artificial leg construction, a thigh
parts by screws 88 passing through the plates section, a calf section,v a pair of plate -parts se
and threaded into the parts 2|. Spacer bush
cured to the sides of said thigh section, a knee
ings may be provided about the screws ii' de- - vjoint‘connecting said sections and comprising a'
sired and an intermediate screw 88a mounts the_ pair of upper parts extending at the sides of. the
pulley. When the described leg is in use a thigh section, each of theparts‘of one oi’ sai`d
strong cord of leather or the like is'passed under pair having a series of horizontally spaced open
the pulleys 85 and 66- and attached to a harness ings therethrough, means connecting the parts at
on the wearer so as to secure the artificial leg
one side of the thigh in spaced relation` to said
Vonto the stump of the wearer’s leg.
openings, and means passing through a selected
To mount or secure inplace the artificial _leg one of said openings inthe parts at each side of
a harness such as shown in Figs. 5 and 6 isem `lthe thigh section and securing the parts at the
ployed. .This harness includes a relatively- wide respective sides of the thigh together with the
preferably leather belt or corset |84 secured about thigh section> in the desired angular relation to
\ ~ >the waist _of the wearer as by a plurality of straps
Y“and buckles |35. Suspender means comprising
65 straps _|36 are secured'to the front portions of
the beit as at |31 and at the back of the wearer
the calf section.
f
_
f
3. In an artificial leg construction, a thigh sec#
tion, a calf. section, a pair of plate parts _secured 65
to the sides .of said thigh section, a knee joint
connecting said sections and comprising a pair
' the straps may be crossed as at |38 and have their
ends sewed or otherwise secured to the _belt as- at - s of upper parts exténdingat'the sides of the thigh
|19. Adjacent its lower edge the belt is provided
70 4with spaced- pairs of perforations |48.
By means of an elastic tape or strap |4| a
support |42 carrying a pulley |48 is attached to
the belt |34.
section, each of the I`>parts of one of said pair
having a series of vertically spaced >openings 70
therethrough, each of ¿the parts of the other pair
_having a series of laterally spaced openings, and
Pairs of hooks |44 may be used 1 means passing through selected ones of. said open
for attachin the ends of the elastic |4| to the
Í 75 belt and suc hooks are passed through~ conven
ings in the parts at each side of the thigh section
andsecuring the parts at the respective sides of 75
4.
_
2,127,566
the thigh section together with the thigh section ing of said knee joint, said means including rela
in the desired position of vertical and angular tively `movable members and resilient yieldable
adjustments relative to the calf section.
' means normally retaining said members in a
-4. In an artiilcial leg construction, a thigh sec- ,A
given relative positionv but to_ yield a limited
tion, a calf section, a knee joint connecting said
sections and comprising a. pair of upper parts
extending at the sides oi' said thigh section, and
amount under pressure, means to move said iirst
means connecting the thigh section to said upper
when a wearer sits. and‘a spring to snap said ñrst
means back into such bearing engagement on
straightening of the leg.
10
parts for vertical and angular adjustments rela
10 tive thereto,- said means comprising A members
means out of such bearing engagement to permit
ñexing of the knee joint for bending of said joint
secured to the thigh section, a plurality of means
connecting said members to the said upper parts
- at vertically spaced points and adapted to permit
relative vertical adjustment between them, one
15 of said securing means being constructed to per
mit relative pivotal movement between the said
members and said parts, and the others of. said
connecting `means being oi a construction to
permit relative lateral adjustment between the
20 said members and said parts to adjust the thigh
'1. In an artificial leg construction, a thigh sec
tion, a calf section, a knee joint connecting said
sections, a lock comprising a member pivoted at
its upper end to said thigh section, a cylinder into
which said member extends, a spring in said
section may be secured to said upper parts in
thc-desired position of vertical and angular rela- "
tion to the calf section.
5. In an artificial leg construction, a thigh sec
25
tion, a calf section, a knee joint connecting said
_sections with their adjacent ends in spaced rela
tion, a transversely curved knee cap plate secured
i pivot to~permit ilexing of the knee joint when a
wearer sits, and a spring to snap said cylinder
member about said pivots, whereby the thigh
to one of said sections and having a free end ex
tending into the other section and slidable rela
tive thereto at the fronts oi' said sections, and
said plate comprising a flexible spring metal
member adapted to iiex as the knee joint is ilexed
andhaving its free end portion held against the
latter section by the resiliency of the plate to close
the space between the sections as the joint ilexes.
6. In an artificial leg construction, a thigh sec
tion, a calf section, a knee joint connecting said
sections, a lock`comprising a means connected
40 with one of said sections and having bearing en
gagement against the other thereof -to limit ilex
cylinder and resisting movement of the member
into the cylinder, a bracket in. said cali section
and on which the lower end of said cylinder rests
when the lock is in normal position limiting ilex
ing of the knee joint, means to draw the cylinder 20
oiî the bracket by swinging the member about its
back into position with its lower end bearing
against said bracket on straightening of the leg.
8. In an artificial leg construction, a thigh sec
tion, a calf section, a knee joint connecting said
sections, a lock comprising a means connected
with one oi.' said sections and having bearing en
gagement against the other thereof to limit ñex
ing of said knee joint, means to move said means
out of such bearing engagement vto permit
greater flexing of the kn'ee joint, a spring to
shift said first means back into such bearing
engagement on straightening o'f the leg, and a 35
manually shiftable catch carried. by one of said
sections and movable to a position to engage the
lock means when out of bearing engagement. for
retaining said latter means out of such bearing
engagement.
NICHOLAS MALLOY-BREHUNOFF.
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