July 13, 1937. M. HACK ET AL.
ARCH SUPPORTING INS QLE Filed Jan. 7, 1955 Patented July 13, 1937 UNITED STATES PATENT OFFICE ARCH SUPPORTING INSOLE Application January 7, 1935, Serial No. 767
3 Claims.
This invention relates to shoes and more particularly to an arch supporting insole.
The main object of the invention is to provide a new type of insole which possesses not only a support for the inner longitudinal arch in the nature of an extension or flange arising in the arch of the foot, but also a support for the outside of the foot consisting of two flanges or extensions, one arising in the forepart of the heel,
and the other back of the toes and taking in the metatarsal region, ,but not including the base of the fifth metatarsal bone. The cuboid bone and the head of the fifth metatarsal bone are free. Anteroposteriorally the innersole is somewhat concave on the bottom and correspondingly convex on the top to provide the curvature of the normal arch.
Another object of the invention is to provide an insole having inner and outer flanges to prevent displacement of the foot bones.
Another object of the invention is to provide an insole having one inner flange for supporting the arch and two outer flanges, one of which is to prevent rotation of the heel bone and the other flange arranged to prevent the region of the metatarsal bones from being displaced towards the outside of the foot.
A still further object of the invention is to provide an insole for furnishing support to the inside of the arch without displacing the foot over too far on the outside.
A still further object of the invention is to provide a saddle effect under the arch of the foot with a.- steadying flange at the inside of the arch to prevent foot rotation.
Another object of the invention is to provide a support under the cuboid area as well as under the longitudinal arch.'
Other objects of the invention will appear as the disclosure progresses. The drawing is intended to merely indicate a possible embodiment of the invention. It is therefore not intended to limit the invention to the embodiment illustrated but rather to define such limits in the appended claims: y
In the drawin Figure 1 is a top view of a developed length of the insole.
Figure 2 is a side view of the insole, the last on which the sole is formed being shown in dotted lines.
Figure 3 is a view of the opposite side of the insole.
Figure 4 is a section on line 4-4 of Figure 2.
. Figure. 5 is a section on line 55 of Figure 2.
Referring now to the drawing in detail, numeral I designates the insole made of leather or the like and comprising a toe portion 2, a rear portion 3 and anarched portion 4. At the inside of the arch portion is an upstanding curved 5flange 5 adapted to hug the inside of the arch and prevent displacement of the foot.
Opposite thecurved flange 5 are a set of two upstanding flanges 6 and I. The flange 6 is adapted to prevent rotation of the heel bone and 10 the flange I is to prevent the region of the metatarsal bones ironi being displaced towards the outside of the foot. The distance between the flanges 6 and I is just enough to prevent irritation of the base of the fifthmetatarsal bone 15 and the cuboid bone.
Underneath the arch portion of the insole is asteel arch support 8 arranged to provide support under the cuboid area as well as under the longitudinal arch. Therear end 9 of the arch 20 support is attached to the insole by the rivet III while the forwardend is free to give" with the movement of the foot. The inside edge ll of the arch support opposite thecurved flange 5 is concave while the opposite edge of the support 25 is partly inclined as at l2 and partly concave as at l3 and meeting at the widened point I4. The portion of the inclined edge l2 of the support is adjacent the flange 6, the concave portion l3 adjacent the flange I and the widened point is sub- 30 stantially between the flanges 6 and 1. The dotted lines [5, I 6 and I! in Figure 1 indicate substantially the line on which the insole is bent to form theupstanding flanges 5, 6 and 1. The dotted lines shown in Figures 2 and 3 indicate 35 the last on which the insole is formed.
It will thus be seen that we have provided an insole for properly supporting the arch of the foot which will be comfortable to the wearer of the shoe and which will prevent the displacement 40 of the foot bones.
Having described our invention, we claim:
1. An insole formed from a single piece of thin material shaped to provide a sole portion and a flange at one side edge thereof shaped to fit 45 the inner longitudinal arch of the foot and lie closely thereagainst within the lateral outer side portion of the upper, a pair of spaced apart flanges at the outer side edge of said sole portion, one of said pair of flanges being integral 50 with the forepart of the heel portion of said sole and stopping short of the mid arch, the other of said pair arising from said edge of the sole forwardly of the forward end of the last mentioned flange of the pair of flanges and merging into said edge back of the toes in the metatarsal region of the foot, the pair of flanges being spaced apart at their adjacent ends to avoid the cuboid bone and the tuberosity at the base of the fifth metatarsal bone, the free edge of all of said flanges being curved in the direction of their length and merged into the edges of the sole, said first mentioned flange being concaved transversely and of a width to extend upwardly to the side of the foot at the mid portion of the arch, and said pair of flanges being curved transversely and both of a lesser width than said first mentioned flange, and a metal shank memberhaving a lateral projection opposite said space between said pair of flanges to support the cuboid bone from beneath, said shank member being concave in cross section to conform to the cross sectional curvature of said sole portion. I
2. An insole comprising a sole portion curved transversely to conform closely to the surface of a shoe sole within a shoe, said sole portion having a pair of edge projections integral with one edge of said portion and curving outwardly and upwardly therefrom to span the angle between sole and upper of the shoe and lie in contact with the upper, said projections being curved at their free edges longitudinally of said sole and merged into the edge of the sole, said projections being spaced apart by a deep depression or notch extending inwardly beyond the meeting of shoe sole and upper in the metatarsal region and midway of the arch at the outer side of the foot, and an edge projection at the side of the sole portion opposite that having said pair, said single projection curving outwardly and upwardly from the edge of said sole portion to fit closely beneath and against the foot arch and extending from the forward part of the heel and merging into rear part of toe portion, and a thin metal shank member of extended width formed concave in cross section to conform to the cross sectional curvature of the arch portion of said insole and formed with an obtuse projection opposite said notch between said pair of projections to support the cuboid bone of the foot from beneath, the opposite side edge. of said shank member being curved inwardly to avoid the curved meeting line of said single edge projection with the arch portion of the insole.
3. An insole comprising a sole portion having a flange along the arch portion thereof to support the inner longitudinal arch, and a support for the outside of the foot consisting of a pair of flanges, one of said flanges of the pair arising from the edge portion of the forepart of the heel portion of the soleand the other of the pair arising back of the toe portion in the metatarsal region of the foot, the flanges of the pair being spaced apart at their adjacent ends to avoid the cuboid bone and the tuberosity at the base of the fifth metatarsal bone, the portion ofthe sole between the first mentioned flange and the flanges of the pair being concave, and a transversely concave metal shank fixed to said sole portion and having a concave edge in plan on the side adjacentthe first mentioned flange, and a concave forward edge portion and a straight edge portion on the side adjacent the pair of flanges, the junction of the straight and concave edges formingan obtuse point opposite the space between said pair of flanges.
MORTON HACK. DAVID R. BRADY.