Патент USA US2116579код для вставки
May 10, 1938. c. P. LEYDECKER 2,116,579 ’ FOOT BALANCING MEANS Filed Oct. 8, 1956 5 ¿Q »8- ab 57 32 33 3/ S a5 25 z@ 34 4/ /A/l/EA/Toe: CHARLES P. ¿frase/rsf Patented May 10, 1938 @H6579 UNITED s'rArEs PATENT QFFECE i 2,116,579 FOOT-BALANCING MEANS Charles P. Leydecker, St. Louis, Mo. Application October 8, 1936, Serial No. 104,646 2 Claims. (Cl. Sii-71) The present invention relates generally to that the lower portion or supporting surface of shoes, and more particularly to a method for eifecting foot balance within a shoe, and means the os calcis is not ñat, but is higher on the inner side and has a tuberosity on the outer side for achieving such balance. which allows the weight to be shifted forward without wobbling of the foot until the weight The present invention is predicated upon the 5 theory that there is only one longitudinal bone arch in the foot construction, the columns or supports of which comprise the os calcis and the forward portion of the first matatarsal. Many authorities aver that there are three or four arches in the longitudinal dimension of the foot; l but a study of the bones in the feet shows that the many bones which comprise a foot make up one complete arch, some parts of which are concave and some parts of which are convex, but all of which contribute to the one single arch. Modern shoe construction has resulted in the dropping of certain bones of the foot, notably the cuboid and the fifth metatarsal, so that the rear portion of the fifth metatarsal contacts 20 the shoe in walking which, in effect, provides two arches, namely, one between the os calcis and the rear portion of the fifth metatarsal, and the other between the rear portion of the fifth meta tarsal and the forward portion of the ñrst meta 25 tarsal or the great toe. This, however, is not a natural position. This lowering of the enumer ated bones of the feet has been caused byv con structing shoes with heels, which raises the posi tion of the os calcis relative to the forward por tion of the first metatarsal. Many devices have been devised in an effort to compensate for the position of the bones in the foot in this man made position relative to the ground; and none of them has been singularly successful. 3 Many have concentrated on supporting the inner side of the foot at the center of the arch by means which are generally designated arch supports. However, few have seriously considered the outer side of the longitudinal arch which, in the final 4O analysis, is the primary weight carrier of the foot. Experiment has shown that the weight of the body in walking is carried from the os calcis, or heel bone, as one main support along a sub stantially curved line through the cuboid` and the fifth metatarsal to the forward portion of the first metatarsal as the second main support. In other words, in walking, the weight of the body is distributed along the outer edge of the 50 reaches the cuboid and the base of the fifth meta tarsal. By this construction, the heel bone shifts the weight forwardly gradually rather than abruptly. As the weight is shifted forwardly, the base of the ñfth metatarsahwhich is, in eiîect, 0 a marked protuberance, assists in the forward shifting thereof by contact with the walking sur face. However, when the heel bone is elevated, the base of the ñfth metatarsal is likewise rela tively elevated and, to contact the walking sur- 15 face, must drop a greater degree, which results in straining the main longitudinal arch, inas much as the bone structure must give to allow this unnatural ultimate position of the base of the fifth metatarsal. This dropping downward ly of the rear portion of the fifth metatarsal N) 0 accentuates the rolling weight distribution throughout the foot and results in the turning over of the shoe which is one of the greatest wear points in modern shoe construction; inasmuch as the majority of shoes, after being worn a short 25 while, show this overturning outwardly of the upper over the edge of the sole. The present in vention contemplates correcting this distorted action of the bone structure by providing a natural support for the base or rear portion of the fifth metatarsal which will alleviate strain in the foot and save this undue overturning of the shoes outwardly. The above noted undue lowering of the outside bone structure of the foot, resultant of raising the 03 5 heel relative to the forward portion of the first metatarsal, strains the whole foot structure and causes tiring of an individual prematurely. Only when the foot is properly balanced is the cir culation of the blood-normal and can the blood enter and leave the pedal extremity without straining the heart. There are nerves passing through the feet which transmit the proper amount of nerve impulses when the circulation 45 is normal, and quite obviously impoverished cir culation will lead to subnormal nerve impulses and resultant impaired activity of the feet. Lengthy experiments have proven that a foot foot in an arc of a circle from the heel bone to housed in a shoe constructed in line with the 1 the forward portion of the iirst metatarsal. The present invention has normal blood circulation. Wearers of such shoes have been able to with stand very substantially greater strains in usage of the feet than when wearing shoes of conven tional design and construction. 55 foot has a tendency to roll, which is a balanced movement when the heel is not maintained raised relative to the metatarsals. Before proceeding, it >should be observed here 55 2 2,116,579 An object of the present invention is to pro vide a method of balancing a foot within a shoe the portion I6 the insert slopes gradually for wardly throughout the portion l to the line 0f to reduce bone and muscle strain and to prevent intersection 8 with the bevelled portion M. The the outward overturning of the shoe upper over the edge of the sole. base of the ñfth metatarsal rests on the raised portion I6. It is to be understood, of course, that the insert lil may be varied in certain of these Another object is to provide a device adapted to support the rear portion of the ñfth meta tarsal and its associated bones in a modern shoe. Another object is to provide means for correct ing modern shoe construction to secure foot bal ance within the shoe. Another object is to provide means for utiliz ing the natural single longitudinal arch of the foot. Another object is to provide means for alleviat 15 ing the unnatural position of the fifth metatarsal when diposed in shoes of modern construction. Another object is to provide means adapted details to conform to Speciñc foot requirements. In Figs. 4, 5 and G the insert l0 is shown in one disposition relative to the elements of a shoe. The illustrative shoe comprises an upper I8, a heel |S, an outsole 2li, an insole 2|, and a lining 22. The insert l0 is disposed between the lining 22 and the insole 2|, though, of course, it could be inserted between the insole 2| and the out sole 2B, if desired. to be used in a shoe to properly balance a foot 20 to relieve muscle and bone strain and to prevent ñguration substantially equivalent to the insert Other objects and advantages will be apparent from the following description, taken in conjunc tion with the accompanying drawing, in which 25 Fig. l is an insert constructed in line with the present invention which is adapted to be disposed within a shoe to effect the purpose and objects of the present invention. 30 Fig. 2 is a section on the line 2-2 of Fig. l. Fig. 3 is a section on the line 3-3 of Fig. 1. Fig. 4 is a central longitudinal section through a shoe showing an insert of the configuration of Fig. l disposed between the insole and the lin ing. Fig. 5 is a section on the line 5-5 of Fig. 4. Fig. 6 is a section on the line 6_6 of Fig. 5. Fig. 7 is a transverse section through a last and associated shoe elements showing a modiñed means of effecting the present invention. Fig. S is a diagrammatic view showing the bone 4.0 structure of the outer side of the longitudinal 35 arch disclosing the position of the fifth metatarsal relative to the -os calcis when the latter is raised. Fig. 9 is a diagrammatic view of the weight f distribution through the bones of the foot. Referring more particularly to the drawing by reference numerals, IG indicates generally an insert for a shoe constructed in the light of the present invention. As is shown in Fig. l, the in sert l0 is generally elongated and is adapted to be disposed in a shoe, as is disclosed clearly in Figs. 4, 5 and 6. In a preferred configuration, the insert IG is bevelled from the rear edge || forwardly to approximately the line |2 to pro vide a gradual support for the muscles and tissue forwardly of the supporting point of the osy calcis. Itis further provided with a sharp bevel i3 along the side which is remote from the outside of the shoe, the bevel i3 gradually widening forwardly, 60. as at Ul, to provide a general slope for eiîectively shifting the weight of the foot from the fifth metatarsal to the forward portion of the ñrst metatarsal, which is the second main supporting point of the longitudinal arch. The outward edge l5 of the insert lll conforms to the outward lines of the shoe and is substantially perpendic ular, as can be seen from an inspection of Fig. 6. That portion of the upper side of the insert in dicated l5 is substantially parallel to the under side, and is of a depth to properly support the fifth metatarsal and the associated bones. From the rear edge ¿i of the portion i6 the insert slopes gradually rearwardly throughout the portion 5 to the line of intersection |2 with the bevelled 75 portion ||. Likewise, from the front edge 6 of 15 In Fig. 7 there is shown another means of ef iecting the present invention. A last 25 is con structed with a portion of the sole cut away at 26, that portion which is cut away being of a con overturning of the upper over the sole. Si shown in Fig. 1. The shoe is constructed on this preformed last in a manner to provide a built-up portion 2l between the outsole 28 and the insole 29. The built-up portion may be composed of strips of leather, composition, metal, or other 25 material which will provide a firm built-up por tion for the outer side of the longitudinal arch. The built-up portion 2l and the insert It are of a material firm enough to withstand the con tinual application thereto of the base of the fifth 30 metatarsal; for, if it yields, the supporting ef fectiveness will be lost. However, it must be con structed and disposed so that the foot does not have the sensation of treading upon an obstruc tion within the shoe. In Fig. 8 there is shown diagrammatically the disposition of the bones along the outer side of the foot when the foot is placed in a shoe having a heel. It will be observed that the os calcis 3| is a considerable distance above the forward por 40 tion 32 of the fifth metatarsal 33. 'I'he rear por tion 34 of the ñfth metatarsal assumes a position on a plane between those of the forward portion 32 and the os calcis 3|. of the phalanges 35, the tragalus 3T are as shown. thus raising the os calcis The relative positions cuboid 3S and the as It is quite obvious that 3| deiînitely forces the remaining bone structure to assume an unnat ural position which the present invention posi tively corrects. 50 In Fig. 9, there is disclosed diagrammatically by the arrows 4B the line of body weight shifting in walking, which is from the position 4| of the os calcis to the position 42 of the forward position of the ñrst metatarsal. This diagrammatic illus tration emphasizes the forward rolling of the weight in walking along an arc of a circle. Clearly, if no support is afforded the base or rear portion of the fifth metatarsal, then the foot must roll outwardly to an extent which will deform the shoe and cause the upper to substantially overlap, the edge of the sole. This undue rolling of the foot produces a continual strain on the muscles, the ligaments, and the bones of the foot which tires an individual in a very short time. Such rapid tiring of an individual palpably re sults in impaired and ineiiîcient use of the pedal extremities and of the rest of the human mecha nism; for tired feet result in a tired body and an irritated and restricted mental condition. Hence, to properly balance` the feet will contribute ma terially to the total efficiency of an individual. It is evident that there has been provided a method and means for balancing a foot within a shoe to eliminate and remove strain on the mus 3 2,116,579 cles, ligaments, tissues, and bones of the foot. There has also been provided means for prevent~ ing undue rolling of the foot which habitually re sults in the overturning of the shoe upper over the edge of the sole which produces an unsightly appearance. It is to be understood that the foregoing de scription and accompanying drawing have been given by way of illustration and example and not 10 for limitation, the invention being limited only by the following claims. What I claim is: 1. A foot support for use in shoes and adapted to lie beneath the outer side of the longitudinal arch of the foot, including a first section elevated above the normal level of the inside of the shoe to support in elevated position the rear portion of the ñfth metatarsal, said section being of sub stantially even height throughout its area, and terminated at its rear short of the heel seat and at its front at a point shortly ahead of the said rear of the said fifth metatarsal, a second sec tion extending forwardly from the said front por tion of the first section and sloping downwardly toward the inside level ofthe shoe, said second section extending forwardly under the front por tion of the fifth metatarsal to provide positive support thereof at an elevation above the inside level of the shoe but at a less elevation relative to the inside level ofV the shoe than is provided by the ñrst section, said second section, ahead of the front of the ñfth metatarsal, being then lowered to the inside level of the shoe. 2. A. foot support for use in shoes and adapted to lie beneath the outer side of the lon gitudinal arch of the foot, including a back sec tion having a rear edge adapted to lie adjacent the os calcis and said back section extending forwardly from said rear edge and sloping up 10 Wardly from the normal level of the inside of the shoe to provide support for the portions forward ly and on the outer side of the os calcis, a mid dle section at the forward end of the rear sec~ tion having a substantially constant elevation 15 above the inside level of the shoe, and extending beneath the rear of the ñfth metatarsal to sup port such part above the normal level of the in side of the shoe, and a front section extending forwardly from the middle section, said front 20 section tapering downwardly from the middle section toward the front of the shoe, and extend ing beneath the front of the fifth metatarsal to support the same above the level of the inside of the shoe, said front section, ahead of the front 25 of the fifth metatarsal, being then lowered to the inside level of the shoe. CHARLES P. LEYDECKER.