Classifications

• • A—HUMAN NECESSITIES
  • A43—FOOTWEAR
  • A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
  • A43B5/00—Footwear for sporting purposes
  • A43B5/08—Bathing shoes ; Aquatic sports shoes
• • 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
  • A43B13/22—Soles made slip-preventing or wear-resisting, e.g. by impregnation or spreading a wear-resisting layer
  • A43B13/223—Profiled soles

Definitions

• the invention relates to a tread sole for aquatic sports shoes such as sailing and surfing shoes provided with a con ⁇ tinuous plane running surface substantially extending from the heel to the toes and with a delicate profiling .pattern consisting of transverse, mutually parallel zig-zag or wave-shaped incisions.
• Such a sole which is intended to provide an antiskid effect particularly on a moist surface is shown, for example, in US-PS 2 206 860.
• a heel is provided in this sole.
• conventional aquatic sports shoes are provided with a heel-less sole in which the sole is formed with a heel wedge rather than with a heel.
• This object is attained by providing the heel area with a recess which is open towards the running surface, hich is surrounded by a substantially stiff wall portion and which is defined by a flexible membrane on the side facing away from the running surface.
• depressions resembling suction cups provided in treaded soles of sports shoes are known as such (compare the DE-OS 27 53 205) What is involved in this case, howeer, are low-depth cup-shaped depressions provided in the desired areas of the running sole, for example in the area of the large or the small ball of the foot or in the area of the heel of the shoe or the heel of the foot. These small shallow cups formed in the running sole are intended to produce a certain suction effect. The yieldability of the cup-like area corresponds to the total yieldability of the running sole.
• the running sole In contrast to this, it is an essential requirement to be met by the running sole according to the present invention to provide in the heel area a flexible membrane as a supporting surface for the heel of the foot, which membrane permits the heel of the foot to sink deeply into the height of the run ⁇ ning sole whenever the weight of the body is predominantly supported by the heel of the foot and is transmitted to the running sole by the latter.
• This elastic sinking of the heel of the foot to a large depth into the material of the running sole facilitates the assumption of a large rearward inclina ⁇ tion of the body, this in most cases permitting raising of the forward part of the foot to be dispensed with, the result being that despite the change in posture the sole of the foot will continue completely to be supported by the.
• running sole of the sports shoe and, in contrast to the past, is con ⁇ siderably better adapted, by means of the entire running sole surface, to transmit the body weight and the other forces to the contact surface of the ground.
• the entire running surface/in an at least partly loaded con ⁇ dition so that also the entire profiled running surface area within its total extent will at least aid in transmitting parts of the forces and thus contribute to an antiskid effect. In this manner both the antiskid effect and the convenience of body posture with the body inclined to a large extent are considerably improved despite the fact that the fine treading of the running surface is retained.
• the depth of the depression in the heel area practically extends throughout the entire thickness of the heel wedge.
• the running sole is provided, within the heel area at its periphery, with a peripheral groove having a large depth measured parallel to the run ⁇ ning surface.
• peripheral grooves are per se known (compare DE-OS 27 53 205).
• the peripheral groove extending to a large depth into the heel portion serves an additional function.
• Fig. 1 a plan view of the running surface of the novel run ⁇ ning sole according to the invention
• Fig. 2 in a side elevation the heel area of the running sole of Fig. 1, . - 7 -
• Fig. 3 a longitudinal cross section of the running sole of Fig. 1, and
• Fig. 4 diagrammatically the heel area of the novel running sole.
• the running sole for aquatic sports shoes shown in Fig. 1 is particularly suitable for sailing shoes and surfing shoes.
• the running sole is provided with a continuously plane run ⁇ ning surface 2 extending from the heel 5 up to the toe area 3.
• a fine tread con ⁇ sisting of incisions 7 and 6 extending transversely and mutually parallel in a zigzag or wave-shaped pattern.
• the two different kinds of incisions are illustrated as examples. It is also possible to provide other similar treads comprising fine incisions, it being assumed that in any given running surface a tread of a single type only is provided.
• the pro ⁇ filing may terminate short of the edge defining the running surface at an untreaded narrow marginal zone 10 or it may extend into the lateral wall.
• an untreaded area 8 or 9 re ⁇ spectively, having a width of approximately 1 cm.
• a heel wedge 4 rather than a heel proper.
• peripheral edge 23 of the sole there is provided in the heel wedge area 4 a deep-cut. peripheral groove 16 surrounding the entire heel area and extending parallel to the running surface.
• the running sole consists of a relatively soft rubber.
• the heel wedge is formed by a lattice comprising intersecting material ribs 17 so that the heel wedge contributes only little to the total weight of the run ⁇ ning sole.
• a profile element 11 Centrally of the heel area of the running sole there is pro ⁇ vided a profile element 11 comprising a large-area depres ⁇ sion 12 extending to a large depth into the running sole.
• the depression 12 is surrounded by an essentially stiff frame-shaped wall portion having the shape of a frustoconical wall 13.
• the depression has a circular outline. However, there may also be provided a different out ⁇ line although the circular outline is preferred.
• the stiff wall portion 13 in its part located•in the interior of the running sole 1 serves to clamp in position the peri ⁇ pheral edge of an elastic flexible membrane 15 internally covering the depression 12.
• the membrane is formed by a thin-walled large-area material segment of the running sole and is disposed at the level of the upper side of the heel wedge 4 and thus substantially terminates at the common sur ⁇ face of the lattice 17.
• the membrane 15 Upon the membrane 15 being loaded by the heel of the foot with a normal vertical posture being maintained, the membrane 15 is compressed to a small extent only because the weight of the body is distributed in a substantially uniform manner by the sole of the foot throughout the running sole of the shoe. However, upon the posture being changed in such a man ⁇ ner that the weight of the body is displaced in a rearward direction or in a rearward as well as lateral direction, the load acting on the membrane 15 will increase so that the membrane yields and that the heel of the foot may sink deeply into the foot wedge portion 4 of the running sole.
• the peripheral wall 13 of the depression 12 yields to a relatively small extent only because this wall is itself relatively stiff and this wall is additionally integrated in a force-absorbing manner into the heel wedge 4 by means of the lattice 17.
• the heel of the foot is permitted, as compared to the normal supporting surface, to sink relatively deeply within the aquatic sports shoe so that the changed posture may be conveniently assumed without it being necessary for this purpose to raise the forward part of the foot.
• the entire running surface 2 of the running sole will remain in contact with the supporting sur ⁇ face. Therefore, even with more extreme postures the running surface will remain at least partially loaded by the weight of the body throughout its extent so that the fine tread 6 or 7, respectively, also with these extreme postures is adapted to contribute to an antiskid effect throughout the
• the large depression 12 together with the membrane 15 serves not only to improve the antiskid effect but also the convenience with which extreme postures may be assumed, it being understood that in aquatic sports activities it is frequently necessary to retain such postures for a major period of time.
• the peripheral groove 16 does not only improve the yieldability of the heel portion of the running sole but in connection with the membrane 15 the groove 16 makes it possible that also with a laterally and rearwardly directed posture the sole of the foot is capable also in the heel area ' to follow the changed inclination of the body and nevertheless to transmit the entire force within a large area to the running surface 2 and thus to the supporting surface.
• the fine tread consists of fine sinusoidal or zigzag parallel incisions.
• the center-to-center distance of the incisions amounts to approximately 2 to 3 mm.
• sinusoidal incisions amounts to about 3 mm, whereas the ampli ⁇ tude of the sinusoidal incisions amounts to approximately 6 to 7 mm.
• the depth of the incisions is constant and amounts to approximately 3 to 4 mm. The incisions are so narrow
• the thickness of the membrane 15 amounts to 1 to 2 mm or less.
• the depression 12 has its largest dimension in the plane of the running sur ⁇ face 2. This dimension amounts to approximately 1/3 to 2/3 of the width of the running surface 2 in the heel area 5. Preferably the dimension of the depression 12 amounts to approximately 1/2 of the width of the heel.
• the depth of the depression 12 substantially corresponds to the height of the heel wedge 4.
• the peripheral wall portion 13 should, as shown in Fig. 4 in an exaggerated manner, be considerably stiffer than the membrane wall portion 15. This may be realized either by providing a larger wall thickness of the wall portion 13 and/or by supporting the wall portion 13 by means of an integral connection to the lattice 17 of the- heel wedge.
• a skull ⁇ cap-shaped depression 12 In some cases there might also be provided a skull ⁇ cap-shaped depression 12. What is preferred,- however, is the construction shown in which the membrane 15 is clearly offset in relation to the peripheral wall portion 13, with the result that the yieldability of the membrane 15 practically extends throughout the inner area of the depression 12. With the heel area loaded to an extreme extent, it is, of course, possible for the peripheral wall 13 to participate in the resilient deformation of the membrane with the increase of the deformation being accompanied by the elastic restoring force being increased due to the higher stiffness of the wall 13 and its rigid connection to the lattice 17 of the heel wedge.
• the preferred embodiment provides for the wall defining the depression 12 in the material area of the running sole to be constructed to extend freely in an upward direction, that is to say that the depression 12 is not formed in the solid material of the heel wedge.
• the membrane 15 with the wall 13 con ⁇ stitutes an independent part within the integral running sole and as such is connected to the heel wedge by way of the lattice 17 at point-size places only.

Landscapes

• Health & Medical Sciences (AREA)
• General Health & Medical Sciences (AREA)
• Physical Education & Sports Medicine (AREA)
• Footwear And Its Accessory, Manufacturing Method And Apparatuses (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=6140493

Family Applications (1)

Country Status (4)

Families Citing this family (3)

Family Cites Families (6)

• 1981
  • 1981-08-31 DE DE19813134339 patent/DE3134339C1/de not_active Expired
• 1982
  • 1982-08-30 JP JP50269682A patent/JPS58501412A/ja active Pending
  • 1982-08-30 EP EP19820902676 patent/EP0087445A1/de not_active Withdrawn
  • 1982-08-30 WO PCT/EP1982/000185 patent/WO1983000803A1/en unknown

Non-Patent Citations (1)

Also Published As

Similar Documents

Legal Events