Classifications

• • A—HUMAN NECESSITIES
  • A43—FOOTWEAR
  • A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
  • A43B13/00—Soles; Sole-and-heel integral units
  • A43B13/14—Soles; Sole-and-heel integral units characterised by the constructive form
  • A43B13/18—Resilient soles
  • A43B13/181—Resiliency achieved by the structure of the sole

Definitions

• the invention relates to footwear, mainly a running shoe, comprising a sole unit with a binding sole and a wearing sole and an upper part fixed thereto.
• Hitherto known running shoes of that kind are supplied with a sole that is more or less elastic. This is mainly by means of a pad between the binding sole and the wearing sole.
• the pad is preferably made of foam plastic, which functions as a sort of shock absorber for the foot which has to transfer the weight from body when the foot touches the ground in a cycle of movements.
• Such pads work like passive shock absorbers whose only purpose is to protect the bones and joints of the foot and the leg and the blood cells, which are exposed to a heavy pressure, especially when the heel meets the ground.
• This passive absorbing system gives a good contact between the sole of the foot and that of the shoe, as the foot will sink a little into the sole of the shoe, the surface pressure being the less possible.
• the sole unit is sup plied with elastic ribs that are running transversely to the centre line of the shoe, and placed between the binding sole and the wearing sole, if any, and running obliquely backwards against the binding sole in the proceeding direction of the shoe.
• elastic ribs By means of these elastic ribs the shock absorbing and contact creating characteristic of the sole, furthermore, however, a kind of spring effect is achieved from the ribs as they give a obliquely upwards and forwards oriented pressure against the foot during their straightening out, which pressure helps while taking-off, i.e. during the so-called taking-off phase.
• the compression of the ribs is not a passive shock absorption but an accumulation of energy that is released during the taking-off.
• the ribs can be dimensioned according to the placing in the sole so that you can adapt the ribs to the most convenient shock absorption and elasticity.
• Fig. 1 shows the left sole unit from above
• Fig. 2 shows a sectional view II-II in Fig. 1
• Fig. 3 shows a sectional view III-III in Fig. 1 and 2.
• Fig. 1 which represents a left sole of the shoe, seen from above, the outer outlines of the sole are shaped according to the nature of the foot. Longitudinally to the sole runs its centre line a-a, and the zones, where the foot presses against the sole are shown hatched, i.e. at the back the ball of the heel 5, in front the ball of the big toe 8 and the ball of the foot 7, and finally the connection between these zones, the so-called isthmus 6.
• the sole unit is shown on Fig. 2 in a sectional view of the sole of Fig. 1, seen in the direction II-II.
• a binding sole 3 which can be made of leather or the like.
• a rib-sole that is supplied with a number of transverse recesses at the underside, which recesses create the transverse mutually parallel ribs 1.
• These ribs have an inclination of approx. 40o to the binding sole, but this angle can be varied which is later to be explained.
• a wearing sole 2 can be fastened to the rib-sole.
• Fig. 3 shows a sectional view across the sole in the direction III-III on Figs. 1 and 2. It appears that the wearing sole 2 proceeds upwards, round the rib-sole and surrounds it. The wearing sole is rounded off the whole way round the sole , along the outside 11, as shown on Fig. 3.
• the rib-sole is preferably made by moulding of polyurethan on the basis of ether. Then the surface of the ribs gets a viscous membrane with an improving effect to the elasticity of the ribs, which will be explained later.
• the sole has been constructed with a maximum contact surface between foot sole and shoe bottom causing the less possible surface pressure.
• the general elasticity of the sole by load results in a general increase of the contact surface of the foot sole with the shoe bottom, as the foot will sink more or less down into the sole.
• the ribs with their air space intensify the ability of compression of the sole, and the maximum energy is accumulated in the compressed ribs.
• the ribs are compressed in a successive movement from the heel to the toe causing a kind of undulation in the binding sole with an improving effect to the circulation in the foot sole.
• This function means that the foot is guided through the proceeding line 4 which is indicated with a dot-and-dash line on Fig. 1.
• the height 9 of the ribs on Fig. 3 is larger in the right side than in the left side 10.
• This means that the ribs at the proceeding line 4 may have a height 9 of e.g. 18 mm whereas the general height 10 of the ribs may be e.g. 15 mm. In this way a greater elasticity and suspension is achieved around the proceeding line than in the rest of the sole.
• the ribs 1 may completely or partly form other angles with the centre line a-a of the shoe in order to fulfill special needs. In this way you can e,g. compensate for sideways loads of different strenghs and directions.
• this sole creates the conditions according to the best utilization of the spring function of the muscles. This can be exploited by people with e.g. a stationary job where the body can be moved forwards and backwards in the ankle join with active back and calf- muscles and with full activity in the toes, as the feet can "walk" in the sole.

Applications Claiming Priority (2)

Publications (1)

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• 1980
  • 1980-04-17 DK DK162580A patent/DK153735C/da not_active IP Right Cessation
• 1981
  • 1981-04-21 WO PCT/DK1981/000042 patent/WO1981002969A1/en active Application Filing
  • 1981-04-21 DE DE813144409A patent/DE3144409A1/de not_active Ceased
  • 1981-04-21 DE DE19818132696 patent/DE8132696U1/de not_active Expired
  • 1981-04-21 EP EP19810901156 patent/EP0051619A1/de not_active Withdrawn
  • 1981-12-14 SE SE8107463A patent/SE8107463L/xx unknown

Non-Patent Citations (1)

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