US 2190568 A
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Feb. 13, 1940. E. LATTEMANN 2,190,568
DE'IORS ION SHOE Filed June 2,; 1938 2 Sheets-Sheet 1 1 fn eman- Feb. 13, 1940. E. LATTEMANN D ETORSIO.N SHOE 2 Sheets-Sheet 2 Filed June 2, 1938 [nven/oni aw" Patented Feb. 13, 1940 v UNITED STATES PATENT ori ice Emu,meiiy iji aigfiMame, v
Application June 2, 1938, Serial No. 211,435 In Germany August 5, 1937 'rolaims, (01', 36- 71) The axial position for shoes made on a last, emanating from Brofessorvon Meyer and which was formerly generally employed has been abandoned in the last decades by the industry and shoemaking trade after, particularly doctors, such as Dr. Sohanz Ofiicer of Health of Dresden, have upheld the view that besides ieet corresponding to the Meyer fundamental or axial positionfialso feet with a so-called straight axial position exist.
A centre'line according to the Meyer fundamental position extends from the middle of the heel accurately through themiddle of the :big toe, whereas according to Schanz the centre line passes accurately from the middle of the heel between the second and third toes. The change in the position of the big toe, especially the cause for crooked toe, was attributed partly to too pointed footwear and partly to progressive splaying foot formation.
20 In spite of the many rules for the treatment of such feet no method has been devised sofar which enables at least the changed yet still normal foot to be brought to a normaldevelopment. It is generally agreed that, when walking, first '25 the inner tuberosity of the oscalsis is first brought to bear, whereupon the weight of the body is gradually supported bythe outer edge of the foot up to the outer ball and thence to the inner ball,
being finally transferred to the big toe. 3 The so-called wringing of the foot when walking has been ascertained by many doctors, In order to attain such a development ofthefoot when, walking with factory-made shoes, many supports have been proposed, by which thefoot is given an inclined position that is the so-called first phase from the oscalsis up to the outer edge of the foot. In the majority of cases, however, diiiiculties occur from this point, namely in order to obtain the change over from the outer ball on w to the inner ball as second phase, inorder to then carry out the third phase of the development of the foot over the big toe, which is only possible from the second phase'. It has been proposed to obtain this heel guiding by supporting the sustentaculum tali as suggested by the weak instep support described in German PatentNo. 522,874, as this ensures the,
correct position of the oscalsis. On the other hand, no'shoe exists to-day which allows the front portion of the'foot to tread so straightly as it does in soft sandysoil, namely thesoft inner ball to become more deeply embedded than the outer ball, as according to the normal foot development the little toe ball fonly serves 'for 5 steadying while, as compared with the big toe The object of the invention is, to attain the correct development of the foot, that is the wringing in the above described threephases, by a novel construction of shoe, especially by' a novel constructiono-f theinsole;
them to fit more snugly on the upper.
ball, the inner ball carries the whole load. For this purpose nature has provided the inner ball with sesame-id bones. If by wrongly shaped footwear the inner ballcanscarcely work and if then the main load is placed on the outer ball during the bending of the foot, the foot can only function in an imperfect manner, this becoming apparent by the treading over of the shoes. On
the other hand, a changed axis position in no way re-establishes the performance ofthe foot .10 and consequently provision must be made to ensure; that the second phase of the foot,v that is the changing over from the outer ball to the inner hall, is not rendered more difiicult but facilitated.
It is known to provide transverse slits in the insoles of footwear and such transverse slits have even been arranged in (the longitudinal direc- -tion in ord-er'to thereby'obtain greater flexibility. -Furthermore, the bent up flaps of the insole have also been provided with incisions to cause On the other hand, insoles have been proposed which areinoised all around their edge so as to ensure good bearing against the upper when bending up. Finally, domed supports are known which are provided with transverse slits.
As compared herewith the invention consists in that the insole is provided only at the. outer ball with transverse slits converging from the outer edge towards the inner ball.
By this novel construction, and particularly by the combined application of a slit outer ball wedge tapering towards the edge of the inner ball, a
normal development of the foot in the above de- 40 scribed three phases is obtained when walking in that: i i
-11 A straight position of the front portion of the foot on the'ground' is obtained, in that ,a
minimum outer edge wedge of 2 to 3 mrns; is 5 fittedin each shoe, 1
2. This wedge and the insole abovethe same are made extremelyflexible precisely at the out er balleffecting the second phase of the development that is the change over from the outer to 160 the inner side,
3. The shoe waist is made as pliable aspossible from the middle up to the root of'the ball and 1 4. Absolutely reliable heel osition is ensured i the inner side in the direction of the arrow 2 as The invention can be carried out in various ways. Two embodiments will be hereinafter de: scribed with reference to the accompanying drawings, in which:
Fig. 1 shows in top plan view an insole with wedge placed thereunder,
Fig. 2 is a longitudinal section through a sole of a shoe,
Fig. 3 shows the outer sole in top plan view with the wedge after removal of the insole,
Fig. 4 is a section on line III-,-III of Fig. 1, Fig. 5 shows a modified form of construction of a shoe in longitudinal section,
- Fig. 6 is atop plan view of Fig. 5,
Fig. 7 is a section on line VIIVII of Fig. 6. Fig. 1 shows that the foot, commencing from the setting down point a, of the heel develops in the direction of phase i, then changes over from the small toe ball from the outer side towards only a slight taper from about 2 to 3 mms., and
which is arranged under the insole c at the front ;merely on the outer ball in inward direction.
The insole c is provided only on the outer ball with, transverse preferably fan shaped slits e converging from the outer edge (1 up to the inner -'ball. The slits e extending almost across the :entire width of the insole at the outer ball portion register with the slits f in the wedge b tapering from the'outer ball towards ,the edge of the inner ball. The slits therefore register accurately,
the wedge extends approximately from the transition from the waist to'the outer ball up to al- -most the point of the shoe. The wedge tapers to a-sharp point at a distance of about 1 cm. from the inner edge, as shown in Fig. 4 of the drawings.
A support 9' serving as weak instep'support is arranged injthe shoe under the oscalsis on the inner edge. The shoe is further constructed in its'arch preferably as a freely oscillating. joint.
By this novel construction of the insole with the slit thin wedge thereunder an extremely high degree of flexibility'is imparted to the insole while at the same time giving the front portion of the foot an inclined position from the outer towards the inner side. 7 The wedge may berigidly connected, with the insole, In any case, as the slits in the wedge and insole accurately register in equal lengths a kind of rollerblind is formed. Thus, an exceptionally favorable development of the footis attained especially from the outer to'the inner side at the outer ball, that is the "second phase of the'walking. movementis facilitated.
The insole with slits is preferably provided, after the stitching, with a cover sole whichis formed by a thin, soft covering layer h of chrometan'ned upper leather or similar soft material extending from the tip to the waist and which is intimately connected with the front portion of the insole by sticking and pressing. Thus, the formation of a kind of roller blind with the members of the insole formed by the slitting is facilitated.
Provided the movability of the sole from the middle of the waist up to the root of the ball is ensured, the'rear portion of the foot is brought, when walking, into supination by a weak instep support and the front portion of the foot into pronation.
I 'Ihis effect is increased if, as weak instep support (Fig. 5) a support It is used exclusively under the s'uste'ntaculum tali i of the known oscalsis spur on the inner side of the foot, this support being preferably adapted to the actual conditions-as a wedge as regards varying thickness. W Furthermore, the waist is kept flexible from the middle between the heel breast l and the beginning of the ball by fitting at the heel 'under the oscalsis a hard, strong steel spring m which extends from the middle of the heel bed only to almost the middle of the waist. The portion of the waist n between the end of the steel spring and thetransition to the ball is filled with vcomposition.
This. r'elatively short steel spring is fitted in the. heel or rigidly connected therewith so that 'thespring can be regarded as forming part of the heel portion. The spring has for its object to support the weak instep support lying over the inner heel edge and the outer edge Wedge preferably in conjunction with a pasteboard stiffener so that the base for the oscalsis may be called independent and absolutely solid.
For the purpose of forming an indented heel mould a heel wedge 0 may be arranged in known manner on the outer edge. The technical diniculty arising when tacking the slit insole and wedge..can be surmounted by placing a strip of paper or the like on the under side of the insole over the slits during the taking. Care must be .-taken, when filling, to see that the composition does not penetrate between the members formed .by the slits f in the Wedge and by the slits e( in the insole and there form a stiffening. The fixation may be effected in various ways,
for example the waist spring can be riveted to the insole which in turn is heldv on the heel by .nails which hold together the insole, outer sole and heel. If desired, separate fixing staples may be provided.
However, itisalso possible to arrange the waist spring on the inner side of the outer sole and .to attachit in someway to the outer sole and the heel.
i It isevident that a separate waist stifiener of ,paste board or the like can be arranged under the insole in known manner and extend from the rear heel edge in to the waist.
. Figs. 6 and 7 show that in the arrangement of a splay foot support p constructed in known manner the slit insole with the slit outer wedge is thickened at its outer edge by an amount equal tothe thickness of the splay foot wedge.
The base produced according to the invention enables an inclining of the oscalsis from the depth of the heel bed and the returning of the foot-into its original position and, in conjunction with the flexible front portion of the foot twisted relatively to the rear portion of the foot by the -wedge,, an oscillating, soft waist middle portion and. consequently a movability and maintaining of the fundamental position are attained which 1. In an orthopedic shoe, an insole provided a with slits extending almost" across the entire width at the outer ball portion and an outer wedge tapering from the waist transition portion to the outer ball almost up to the point on the one hand and to the inner ball edge on the other hand,said wedge having slits corresponding and registering with those in the insole and lowering the inner ball relatively to the outer ball. v
2. In an orthopedic shoe, an insole provided with slits extending almost across the entire width at the outer ball portion and an outer Wedge 2.5 to 6 mms. in thickness tapering to a sharp edge at a distance of 1 cm. from the inner edge of the insole, said wedge having slits corresponding and registering with those in the insole and lowering the inner ball relatively to the outer ball.
3. In an orthopedic hoe an inner sole provided on the outer ball portion with transverse slits converging from andthrough the outer edgetowards the inner ball portion a soft covering layer of yielding material extending over the insole from the point to the beginning of the waist portion and intimately connected with the front portion of the insole by sticking and pressing to form a flexible tie-between and with the members formed in the insole.
4. In an orthopedic shoe an insole provided with slits extending almost across the entire width at the outer ball portion, an outer wedge having slits corresponding and registering with those in the insole and lowering the inner ball relatively to the outer hall, and asplay foot support on said insole, said insole being thickt ened by said outer wedge to a thickness equal to thatof the support.
5. In an orthopedic shoe an insole provided with slits extending almost across the entire width at the outer ball portion, an outer wedge having slit corresponding and registering with those in the insole and lowering the inner ball a relatively to the outer ball, and a waiststifi'ening comprising a hard steel spring extending from from the outer edge of the sole to their inner ends. a
'7. In an orthopedic shoe, a slit flexible inner sole wherein the sole has transverse incisions characterized in that the said transverse incisions form slits extending through said inner sole and solely formed in the outer ball portion of said inner sole, said slits each tapering from the outer edge of theinner sole to the inner ball portion of the said sole. i