CA2107831A1 - Shoe - Google Patents
ShoeInfo
- Publication number
- CA2107831A1 CA2107831A1 CA002107831A CA2107831A CA2107831A1 CA 2107831 A1 CA2107831 A1 CA 2107831A1 CA 002107831 A CA002107831 A CA 002107831A CA 2107831 A CA2107831 A CA 2107831A CA 2107831 A1 CA2107831 A1 CA 2107831A1
- Authority
- CA
- Canada
- Prior art keywords
- layer
- footbed
- shoe according
- range
- shoe
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
Classifications
-
- A—HUMAN NECESSITIES
- A43—FOOTWEAR
- A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
- A43B7/00—Footwear with health or hygienic arrangements
- A43B7/14—Footwear with health or hygienic arrangements with foot-supporting parts
- A43B7/1405—Footwear with health or hygienic arrangements with foot-supporting parts with pads or holes on one or more locations, or having an anatomical or curved form
- A43B7/1415—Footwear with health or hygienic arrangements with foot-supporting parts with pads or holes on one or more locations, or having an anatomical or curved form characterised by the location under the foot
- A43B7/142—Footwear with health or hygienic arrangements with foot-supporting parts with pads or holes on one or more locations, or having an anatomical or curved form characterised by the location under the foot situated under the medial arch, i.e. under the navicular or cuneiform bones
-
- A—HUMAN NECESSITIES
- A43—FOOTWEAR
- A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
- A43B7/00—Footwear with health or hygienic arrangements
- A43B7/14—Footwear with health or hygienic arrangements with foot-supporting parts
-
- A—HUMAN NECESSITIES
- A43—FOOTWEAR
- A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
- A43B7/00—Footwear with health or hygienic arrangements
- A43B7/14—Footwear with health or hygienic arrangements with foot-supporting parts
- A43B7/1405—Footwear with health or hygienic arrangements with foot-supporting parts with pads or holes on one or more locations, or having an anatomical or curved form
- A43B7/1415—Footwear with health or hygienic arrangements with foot-supporting parts with pads or holes on one or more locations, or having an anatomical or curved form characterised by the location under the foot
- A43B7/144—Footwear with health or hygienic arrangements with foot-supporting parts with pads or holes on one or more locations, or having an anatomical or curved form characterised by the location under the foot situated under the heel, i.e. the calcaneus bone
-
- A—HUMAN NECESSITIES
- A43—FOOTWEAR
- A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
- A43B7/00—Footwear with health or hygienic arrangements
- A43B7/14—Footwear with health or hygienic arrangements with foot-supporting parts
- A43B7/1405—Footwear with health or hygienic arrangements with foot-supporting parts with pads or holes on one or more locations, or having an anatomical or curved form
- A43B7/1415—Footwear with health or hygienic arrangements with foot-supporting parts with pads or holes on one or more locations, or having an anatomical or curved form characterised by the location under the foot
- A43B7/1445—Footwear with health or hygienic arrangements with foot-supporting parts with pads or holes on one or more locations, or having an anatomical or curved form characterised by the location under the foot situated under the midfoot, i.e. the second, third or fourth metatarsal
-
- A—HUMAN NECESSITIES
- A43—FOOTWEAR
- A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
- A43B7/00—Footwear with health or hygienic arrangements
- A43B7/14—Footwear with health or hygienic arrangements with foot-supporting parts
- A43B7/1405—Footwear with health or hygienic arrangements with foot-supporting parts with pads or holes on one or more locations, or having an anatomical or curved form
- A43B7/1455—Footwear with health or hygienic arrangements with foot-supporting parts with pads or holes on one or more locations, or having an anatomical or curved form with special properties
- A43B7/147—Footwear with health or hygienic arrangements with foot-supporting parts with pads or holes on one or more locations, or having an anatomical or curved form with special properties for sick or disabled persons, e.g. persons having osteoarthritis or diabetes
-
- A—HUMAN NECESSITIES
- A43—FOOTWEAR
- A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
- A43B7/00—Footwear with health or hygienic arrangements
- A43B7/14—Footwear with health or hygienic arrangements with foot-supporting parts
- A43B7/22—Footwear with health or hygienic arrangements with foot-supporting parts with fixed flat-foot insertions, metatarsal supports, ankle flaps or the like
Landscapes
- Health & Medical Sciences (AREA)
- Epidemiology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Diabetes (AREA)
- Rheumatology (AREA)
- Footwear And Its Accessory, Manufacturing Method And Apparatuses (AREA)
- Acyclic And Carbocyclic Compounds In Medicinal Compositions (AREA)
Abstract
Abstract A shoe, especially for diabetics or rheumatics, is described. The shoe has a footbed, a cover layer on the footbed, a cushion portion disposed in the footbed, especially in the middlefoot range, heel range and/or toe range, and an intermediate sole. The cushion portion has a multi-layer structure and includes a soft upper layer, a hard intermediate layer and a medium hard lower layer. By this, compressive stresses and/or shear stresses of the foot can be reduced for the greatest part. Furthermore, a correspondingly formed insole is described.
Description
Shoe ., The present invention is directed to a shoe, especial1y for diabetics or rheumatics, comprising a footbed, a cover layer on the footbed, a cushion portion disposed in the footbed, especially in the middlefoot range, heel range and/or toe range, and an intermediate sole.
s Such shoes which are upholstered in a special manner are known. They are used in the orthopedic field, however, are also designed for human beings which are very pain-sensitive at the foot, as for example rheumatics. Furthermore, such shoes are used by diabetics who, in old age, have frenquently nerve disturbances which manifest in an - insensibility of the foot. Such human beings perceive pressure pain only ; in an incomplete manner or no more at all so that, if normal footwear is worn, permanent damages of the foot result.
. .
During normal walking or running a horizontal forwardly directed - component of movement of the foot in the shoe results so that the foot has to receive corresponding thrust forces or shear forces. It is just this component of movement which stresses the foot especially high and ;~ results in the above-mentioned permanent damages of the foot with ~ 20 diabetics or in pain appearances with human beings having expecially .
-- 2 - 21~78 ! sensitive feet, for example rheumatics.
In order to guard against these appearances specially upholstered shoes have been developed which are upholstered in the ranges of the foot mostly endangered, namely the middlefoot range, heel range and/or toe range. However, one has observed that with the developments up to now just the thrust loads and shear loads generated by the horizontal component of forward movement of the foot can only be reduced in an insufficient manner.
` It is the object of the invention to provide a shoe of the above-described kind which offers an especially good wear comfort and which especially reduces thrust loads and/or shear stresses of the foot during forward movements of the same in the shoe.
According to the invention this object is achieved with a shoe of the above-cited kind by the feature that the cushion portion has a multi-layer structure and includes a soft upper layer, a hard intermediate layer and a medium hard lower layer.
~ 20 -`~ Accordingly, the shoe according to the invention, which can be any kind of shoe, especially a sandal, has the known footbed serving as static ~` framing with a cover layer disposed thereabove. A multi-layer cushion `~, portion is inserted into the footbed and has, from above to below, a soft layer, a hard layer and a medium hard layer. With such a multi-layer structure optimum results have been obtained for achieving . . .
the above-cited object. It has been observed according to the invention that the upper layer has to be formed correspondingly soft and has to ;~ have an especially low restoring force in order that the individual ~ 30 footbed of the patient can be formed. The intermediate layer has to be ' ~, . . .
i. ~
2197~3~
s Such shoes which are upholstered in a special manner are known. They are used in the orthopedic field, however, are also designed for human beings which are very pain-sensitive at the foot, as for example rheumatics. Furthermore, such shoes are used by diabetics who, in old age, have frenquently nerve disturbances which manifest in an - insensibility of the foot. Such human beings perceive pressure pain only ; in an incomplete manner or no more at all so that, if normal footwear is worn, permanent damages of the foot result.
. .
During normal walking or running a horizontal forwardly directed - component of movement of the foot in the shoe results so that the foot has to receive corresponding thrust forces or shear forces. It is just this component of movement which stresses the foot especially high and ;~ results in the above-mentioned permanent damages of the foot with ~ 20 diabetics or in pain appearances with human beings having expecially .
-- 2 - 21~78 ! sensitive feet, for example rheumatics.
In order to guard against these appearances specially upholstered shoes have been developed which are upholstered in the ranges of the foot mostly endangered, namely the middlefoot range, heel range and/or toe range. However, one has observed that with the developments up to now just the thrust loads and shear loads generated by the horizontal component of forward movement of the foot can only be reduced in an insufficient manner.
` It is the object of the invention to provide a shoe of the above-described kind which offers an especially good wear comfort and which especially reduces thrust loads and/or shear stresses of the foot during forward movements of the same in the shoe.
According to the invention this object is achieved with a shoe of the above-cited kind by the feature that the cushion portion has a multi-layer structure and includes a soft upper layer, a hard intermediate layer and a medium hard lower layer.
~ 20 -`~ Accordingly, the shoe according to the invention, which can be any kind of shoe, especially a sandal, has the known footbed serving as static ~` framing with a cover layer disposed thereabove. A multi-layer cushion `~, portion is inserted into the footbed and has, from above to below, a soft layer, a hard layer and a medium hard layer. With such a multi-layer structure optimum results have been obtained for achieving . . .
the above-cited object. It has been observed according to the invention that the upper layer has to be formed correspondingly soft and has to ;~ have an especially low restoring force in order that the individual ~ 30 footbed of the patient can be formed. The intermediate layer has to be ' ~, . . .
i. ~
2197~3~
formed correspondingly hard and has to have a high restoring force in order to provide for the support or the strength of the cushion portion.
The lower layer is formed medium hard and has a medium large restoring force in order to enable that a bone of the foot having a lower location can be pressed deeply into the cushioning. In this case, the intermediate layer can be pressed into the lower layer on account of the bone with the deeper location, so that the lower layer takes over a corresponding function of protection and takes over corresponding cushioning functions even for cases with especially deeply located bones.
;
Accordingly, the formation of the individual footbed and simultaneously a sufficient support of the foot in the specially upholstered critical range and a safe cushioning even of deeply located bones is achieved by the inventive multi-layer structure of the cushion portion which has at least the above-cited three layers. Thus, the invention represents an essential improvement with respect to the incomplete solutions of the ; prior art. Especially, the thrust stresses and/or shear stresses of the foot generated during a horizontal movement of the foot in the shoe are damped to the greatest part by the elastic guidance of the foot through the upper layer of the cushion portion, wherein the intermediate layer ` gives the foot a sufficient support effect so that the foot does not .,,;
~~ "float" in the footbed. Such thrust stresses and/or shear stresses-are ;- sufficiently damped by the medium hard lower layer even with regard to deeply located bones.
~:, The cushion portion can be disposed in the footbed in an areally confined manner and can be associated with one or more critical ranges of the foot. These critical ranges are especially the middlefoot range, ~' 30 heel range and/or toe range. So, according to a special embodiment of ''`;
i . .
The lower layer is formed medium hard and has a medium large restoring force in order to enable that a bone of the foot having a lower location can be pressed deeply into the cushioning. In this case, the intermediate layer can be pressed into the lower layer on account of the bone with the deeper location, so that the lower layer takes over a corresponding function of protection and takes over corresponding cushioning functions even for cases with especially deeply located bones.
;
Accordingly, the formation of the individual footbed and simultaneously a sufficient support of the foot in the specially upholstered critical range and a safe cushioning even of deeply located bones is achieved by the inventive multi-layer structure of the cushion portion which has at least the above-cited three layers. Thus, the invention represents an essential improvement with respect to the incomplete solutions of the ; prior art. Especially, the thrust stresses and/or shear stresses of the foot generated during a horizontal movement of the foot in the shoe are damped to the greatest part by the elastic guidance of the foot through the upper layer of the cushion portion, wherein the intermediate layer ` gives the foot a sufficient support effect so that the foot does not .,,;
~~ "float" in the footbed. Such thrust stresses and/or shear stresses-are ;- sufficiently damped by the medium hard lower layer even with regard to deeply located bones.
~:, The cushion portion can be disposed in the footbed in an areally confined manner and can be associated with one or more critical ranges of the foot. These critical ranges are especially the middlefoot range, ~' 30 heel range and/or toe range. So, according to a special embodiment of ''`;
i . .
- 4 - '~ 8 3 ~
~, ¦ the invention the cushion portion is located in the middtefoot range of the footbed. According to a special embodiment the upper and intermediate layers extend over the whole footbed, while the lower layer is areally confined and especially covers only the middlefoot range, heel range and/or toe range. In this case, the whole footbed is cushioned by the two upper layers, while the lower layer, which takes over a damping or protecting function for a deeply located bone or inflammations, ulcera, cicatrizations and open wounds, is only provided in the critical range in which this deeply located footbone etc. can occur.
The footbed itself consists for example of the customary construction of a cork-latex mixture. It has one or several recesses for the cushion portion, wherein the cushion portion preferabty extends through the lS footbed to the intermediate sole. A customary cover layer, preferably ` consisting of shamoy-dressed leather, is located on the upper side of the footbed.
As regards the thickness of the cushion portion, the upper layer has preferably a thickness of 1- 3 mm, the intermediate layer has preferably a thickness of 2-- 4 mm, and the lower layer has preferably a thickness ; of 5 - 7 mm. Especially preferred values are 2 mm for the upper layer, 3 mm for the intermediate layer and 6 mm for the lower layer. Of course, the thickness of the layers can be varied in adaption to the footbed.
-1 25 Accordingly, the above-indicated values are average values. The relative large thickness of the lower layer results from the fact that the same ..
is to enable that the intermediate layer can be pressed into the lower layer with a deeply located bone etc., however, cannot be pressed through to the intermediate sole.
.~, -~ 30 ,~
.
~, ¦ the invention the cushion portion is located in the middtefoot range of the footbed. According to a special embodiment the upper and intermediate layers extend over the whole footbed, while the lower layer is areally confined and especially covers only the middlefoot range, heel range and/or toe range. In this case, the whole footbed is cushioned by the two upper layers, while the lower layer, which takes over a damping or protecting function for a deeply located bone or inflammations, ulcera, cicatrizations and open wounds, is only provided in the critical range in which this deeply located footbone etc. can occur.
The footbed itself consists for example of the customary construction of a cork-latex mixture. It has one or several recesses for the cushion portion, wherein the cushion portion preferabty extends through the lS footbed to the intermediate sole. A customary cover layer, preferably ` consisting of shamoy-dressed leather, is located on the upper side of the footbed.
As regards the thickness of the cushion portion, the upper layer has preferably a thickness of 1- 3 mm, the intermediate layer has preferably a thickness of 2-- 4 mm, and the lower layer has preferably a thickness ; of 5 - 7 mm. Especially preferred values are 2 mm for the upper layer, 3 mm for the intermediate layer and 6 mm for the lower layer. Of course, the thickness of the layers can be varied in adaption to the footbed.
-1 25 Accordingly, the above-indicated values are average values. The relative large thickness of the lower layer results from the fact that the same ..
is to enable that the intermediate layer can be pressed into the lower layer with a deeply located bone etc., however, cannot be pressed through to the intermediate sole.
.~, -~ 30 ,~
.
- 5 - 21~7~3~
Open-cell foam rubber (cellular rubber) is a preferred mater~al for the upper layer. The desired characteristics, as relative small restoring ability for the formation of the individual footbed, can be obtained with this material. The intermediate layer, which is especially hard and strong compared with the two other layers, consists preferably of closed-cell foam rubber (cellular rubber) which has the required high restoring ability so that the intermediate layer can serve in a way as support layer for the multi-layer structure. The lower layer consists preferably of open-cell foam rubber (cellular rubber), wherein, however, this material is harder than that of the upper layer and has a medium restoring ability compared with the two other layers which is higher than the restoring ability of the upper layer, however, smaller than that of the intermediate layer.
~, Preferably, the footbed is ground in a roll-like manner fore and aft in order to guarantee a good step development.
-~ The intermediate sole of the shoe is formed, for example, as stiff sole ~ .-, m-~ or as rigidifying sole. This embodiment is especially suited for diabetics since hereby punctual compressive stresses are uniformly distributed on the foot. The desired load relief of the foot, especially at the mentioned critical location, can be obtained hereby in connection ~-~with the inventive cushion portion. It is recommended with regard to especially pain-sensitive feet, for example with rheumatics, to replace ,~ 25 such a rigid intermediate sole by a soft intermediate sole which generates a buffering effect and, if possible, can also result in a load balancing.
. ~ -"
'~5,' The intermediate sole is preferably located in a hollow space of the footbed. By this, it can be fixed at the footbed in an especially favourable manner, and the shoe as a whole has a less weighty appearance since its height is reduced. Furthermore, this embodiment can be manufactured in an especially favourable manner.
According to a special embodiment of the invention a fourth layer consisting of a deformable cushion material is located between the three-layer structure of the cushion portion and the intermediate sole.
The deformable cushion material can be a deformable thermoplastic cushion material which can be well adapted to the footbed in order to realize an adaption to the roll of the footbed fore and aft. This fourth layer has the function of an additional cushioning. Accordingly, such a ~- fourth layer is only used in special cases.
Of course, apart from this the footbed can be shaped at will and can be .
adapted to the respective shapes of the foot.
, Supplementary, it should be mentioned that the inventive cushion portion ` can be also located in the longitudinal arch of the footbed. Such an embodiment is especially suited for a flat foot or a chacot foot.
An additional cushioning of the foot is obtained by means of the shaft of the shoe. So, one embodiment of the invention has a shaft which .:
$~ includes; from the outside to the inside, a leather layer, a reinforcing ~` band, a foam rubber layer and a lining leather layer. The outer leather ' 25 layer preferably consists of nappa leather. The foam rubber layer (cellular rubber layer) is preferably a layer consisting of a ~, closed-cell foam rubber, wherein the layer preferably has a thickness of 3 mm. The lining leather is tanned in a vegetabile manner and is thus free of chromium.
- .-- - .. - .... .. ...
, ~ - .
Open-cell foam rubber (cellular rubber) is a preferred mater~al for the upper layer. The desired characteristics, as relative small restoring ability for the formation of the individual footbed, can be obtained with this material. The intermediate layer, which is especially hard and strong compared with the two other layers, consists preferably of closed-cell foam rubber (cellular rubber) which has the required high restoring ability so that the intermediate layer can serve in a way as support layer for the multi-layer structure. The lower layer consists preferably of open-cell foam rubber (cellular rubber), wherein, however, this material is harder than that of the upper layer and has a medium restoring ability compared with the two other layers which is higher than the restoring ability of the upper layer, however, smaller than that of the intermediate layer.
~, Preferably, the footbed is ground in a roll-like manner fore and aft in order to guarantee a good step development.
-~ The intermediate sole of the shoe is formed, for example, as stiff sole ~ .-, m-~ or as rigidifying sole. This embodiment is especially suited for diabetics since hereby punctual compressive stresses are uniformly distributed on the foot. The desired load relief of the foot, especially at the mentioned critical location, can be obtained hereby in connection ~-~with the inventive cushion portion. It is recommended with regard to especially pain-sensitive feet, for example with rheumatics, to replace ,~ 25 such a rigid intermediate sole by a soft intermediate sole which generates a buffering effect and, if possible, can also result in a load balancing.
. ~ -"
'~5,' The intermediate sole is preferably located in a hollow space of the footbed. By this, it can be fixed at the footbed in an especially favourable manner, and the shoe as a whole has a less weighty appearance since its height is reduced. Furthermore, this embodiment can be manufactured in an especially favourable manner.
According to a special embodiment of the invention a fourth layer consisting of a deformable cushion material is located between the three-layer structure of the cushion portion and the intermediate sole.
The deformable cushion material can be a deformable thermoplastic cushion material which can be well adapted to the footbed in order to realize an adaption to the roll of the footbed fore and aft. This fourth layer has the function of an additional cushioning. Accordingly, such a ~- fourth layer is only used in special cases.
Of course, apart from this the footbed can be shaped at will and can be .
adapted to the respective shapes of the foot.
, Supplementary, it should be mentioned that the inventive cushion portion ` can be also located in the longitudinal arch of the footbed. Such an embodiment is especially suited for a flat foot or a chacot foot.
An additional cushioning of the foot is obtained by means of the shaft of the shoe. So, one embodiment of the invention has a shaft which .:
$~ includes; from the outside to the inside, a leather layer, a reinforcing ~` band, a foam rubber layer and a lining leather layer. The outer leather ' 25 layer preferably consists of nappa leather. The foam rubber layer (cellular rubber layer) is preferably a layer consisting of a ~, closed-cell foam rubber, wherein the layer preferably has a thickness of 3 mm. The lining leather is tanned in a vegetabile manner and is thus free of chromium.
- .-- - .. - .... .. ...
, ~ - .
- 7 - 21~7 ~i According to an improvement of the inventive shoe the footbed is provided with a longitudinal arch-support. A further embodiment is characterized by the feature that the footbed has a heel inclination.
Preferably, the heel inclination extends over substantially the half of 5 the heel range of the footbed and ascends towards the inner edge of the footbed.
Especially good results are obtained with a combination of both features. 8y this, in connection with the inventive cushion portion with multi-layer structure an especially good support of the foot is obtained because punctual supporting, as a normal longitudinal arch-support or a ~` sustemtaculum support, which can cause pain, is avoided. With the kind of support selected according to the invention it is possible to again bring the foot of the diseased person (rheumatic, diabetic) into static balance. Accordingly, the solution selected according to the invention, -~ which is a solution for the complete area, is the consequent continuation of the provided cushion portion with which also punctual influences are avoided.
.`, Furthermore, the present invention is directed to an insole for a shoe, especially for diabetics and rheumatics, which has a cushion portion with multi-layer structure according to one of the preceding claims.
.
In the following the invention is described in detail by means of an ` 25 example in connection with the drawings. Of the drawings:
....
figure 1 shows the footbed of a shoe in three-dimensional representation;
figure 2 shows the footbed of figure 1 with a portion cut away in ~ - 8 21~7 ~3 ~
order to show the structure of the cushion portion, in an enlarged scale;
figure 3 shows a cross-section through the shaft material of the shoe; and figure 4 shows a part plan view and a cross-sectional view through the heel portion of the shoe.
The footbed shown in figures 1 and 2 belongs to a shoe which is suited for diabetics. The remaining parts of the shoe, with the exception of a ~ cross-section through the shaft material, are not shown since they have ; no importance for the invention and can be formed customarily. So, the ~-` shoe can be a sandal, for example.
~- The footbed 1 consists of the customary cork-latex-mixture and is ,;~
~- adapted to the shape of the foot. It is formed in a trough-like manner - and has on its underside a central recess for the arrangement of a rigid . ":
sole 8. A cover layer 4 consisting of shamoy-dressed leather is disposed on the upper side of the footbed. This cover layer is customarily formed.
,.....
The footbed has in the middlefoot range 3 (in the figures shown with dashed lines) a recess which takes up a multi-layer cushion portion.
-~ 25 This multi-layer cushion portion includes three layers of which the two -~ upper layers substantially extend over the whole footbed and terminate at the footbed edges, while the lower layer is confined to the middlefoot range. The cover layer 4 extends over the cushion portion so that a uniform termination results on the upper side of the footbed. On the underside the lower layer 7 adjoins the rigid sole 8.
-: .
;: , :'~.' , .
9 21~3~
With such a cushion portion 3 with multi-layer structure the compressive stresses and/or shear stresses of the foot in this range, especially with deeply located bones etc., can be substantially reduced. A
sufficient cushioning of the foot is guaranteed, wherein the upper layer 5 provides for the formation of the individual footbed while the intermediate layer 6 gives the cushioning the corresponding stability.
The lower layer 7 serves as buffering layer in order to enable that the intermediate layer 6 can be pressed in with deeply located bones etc..
The upper layer 5 has an average thickness of 2 mm and consists of an open-cell foam rubber NR which has the following material characteristics:
., raw material base: SBR + NR
~., ASTM grade: Re 42 - 43 strain-hardness: 35 - 91 kPa .~
~- compression strain test: 50 - 60 %
- raw density: 180 - 280 kg/m3.
,:, This is a relative soft material which has a low restoring ability.
~..
The intermediate layer 6 consists of a closed-cell foam rubber and has a j thickness of about 3 mm. The density of the material is 0.07 g/cm3, and I the hardness/Shore is A 18. The material is relatively hard and strong and has a high restoring ability.
The lower layer 7 consists of an open-cell foam rubber NRB and has an average thickness of about 6 mm. The material is relatively strong and hard and has the following characteristics:
.. . . . . . . .. . ... . . .
J :
- lO ~107 831 raw material base: SBR + NR
ASTM grade: RE 43 strain-hardness: 63 - 91 kPa compression strain test: 45 - 55 %
raw density: 160 - 240 kg/m3.
The material of the lower layer 7 has a restoring ability which is greater than that of the upper layer, however, smaller than that of the intermediate layer. All the layers are bonded to one another and in the footbed in a suitable manner.
`~:
The rigid sole 8 can consist of hard paper (Pertinax), for example. This ~` is a thin material with a high strength and a low weight. The thickness is about 3 mm. Such a rigid sole distributes the compression stress .~, -, 15 uniformlY
,,, ~ Figure 3 shows a cross-section through the shaft material for the shoe.
.~
; Also the shaft material is upholstered correspondingly in order to avoid compression stresses of the foot. From the outside to the inside it ,"~ 20 consists of a nappa leather layer 10, a reinforcing band 11, a cushion layer 12 of closed-cell foam rubber with a thickness of about 3 mm and a s~ layer 13 of lining leather tanned in a vegetabile manner.
For comparison purposes, also cushions with four and five layers have been tested. Different cushion grades and cushion arrangements were used. However, the same did not result in an improved effect compared - with the three-layer cushion. Accordingly, additional cushion layers can be used, however, the three-layer cushion is completely sufficient.
~ 30 ,~;
- ll 21~7 83~
Figure 4 shows a part plan view and a cross-sectional view through the heel portion of the shoe. As one can see from the figure, the footbed has a longitudinal arch-support 14 which merges into a heel inclination which is indicated at 15. The transition is areally so that punctual stresses are avoided. The cross-section through the heel portion shows that the heel inclination 15 extends over about half of the heel portion in longitudinal direction and ascends from the center of the heel portion up to the inner edge of the same. Accordingly, the heel inclination 15 gradually merges into the shell edge of the footbed.
, ~;
...
., "
, ~
;~,,;, :.-~,.
:
.
~ , . . ...
~ ,, .
Preferably, the heel inclination extends over substantially the half of 5 the heel range of the footbed and ascends towards the inner edge of the footbed.
Especially good results are obtained with a combination of both features. 8y this, in connection with the inventive cushion portion with multi-layer structure an especially good support of the foot is obtained because punctual supporting, as a normal longitudinal arch-support or a ~` sustemtaculum support, which can cause pain, is avoided. With the kind of support selected according to the invention it is possible to again bring the foot of the diseased person (rheumatic, diabetic) into static balance. Accordingly, the solution selected according to the invention, -~ which is a solution for the complete area, is the consequent continuation of the provided cushion portion with which also punctual influences are avoided.
.`, Furthermore, the present invention is directed to an insole for a shoe, especially for diabetics and rheumatics, which has a cushion portion with multi-layer structure according to one of the preceding claims.
.
In the following the invention is described in detail by means of an ` 25 example in connection with the drawings. Of the drawings:
....
figure 1 shows the footbed of a shoe in three-dimensional representation;
figure 2 shows the footbed of figure 1 with a portion cut away in ~ - 8 21~7 ~3 ~
order to show the structure of the cushion portion, in an enlarged scale;
figure 3 shows a cross-section through the shaft material of the shoe; and figure 4 shows a part plan view and a cross-sectional view through the heel portion of the shoe.
The footbed shown in figures 1 and 2 belongs to a shoe which is suited for diabetics. The remaining parts of the shoe, with the exception of a ~ cross-section through the shaft material, are not shown since they have ; no importance for the invention and can be formed customarily. So, the ~-` shoe can be a sandal, for example.
~- The footbed 1 consists of the customary cork-latex-mixture and is ,;~
~- adapted to the shape of the foot. It is formed in a trough-like manner - and has on its underside a central recess for the arrangement of a rigid . ":
sole 8. A cover layer 4 consisting of shamoy-dressed leather is disposed on the upper side of the footbed. This cover layer is customarily formed.
,.....
The footbed has in the middlefoot range 3 (in the figures shown with dashed lines) a recess which takes up a multi-layer cushion portion.
-~ 25 This multi-layer cushion portion includes three layers of which the two -~ upper layers substantially extend over the whole footbed and terminate at the footbed edges, while the lower layer is confined to the middlefoot range. The cover layer 4 extends over the cushion portion so that a uniform termination results on the upper side of the footbed. On the underside the lower layer 7 adjoins the rigid sole 8.
-: .
;: , :'~.' , .
9 21~3~
With such a cushion portion 3 with multi-layer structure the compressive stresses and/or shear stresses of the foot in this range, especially with deeply located bones etc., can be substantially reduced. A
sufficient cushioning of the foot is guaranteed, wherein the upper layer 5 provides for the formation of the individual footbed while the intermediate layer 6 gives the cushioning the corresponding stability.
The lower layer 7 serves as buffering layer in order to enable that the intermediate layer 6 can be pressed in with deeply located bones etc..
The upper layer 5 has an average thickness of 2 mm and consists of an open-cell foam rubber NR which has the following material characteristics:
., raw material base: SBR + NR
~., ASTM grade: Re 42 - 43 strain-hardness: 35 - 91 kPa .~
~- compression strain test: 50 - 60 %
- raw density: 180 - 280 kg/m3.
,:, This is a relative soft material which has a low restoring ability.
~..
The intermediate layer 6 consists of a closed-cell foam rubber and has a j thickness of about 3 mm. The density of the material is 0.07 g/cm3, and I the hardness/Shore is A 18. The material is relatively hard and strong and has a high restoring ability.
The lower layer 7 consists of an open-cell foam rubber NRB and has an average thickness of about 6 mm. The material is relatively strong and hard and has the following characteristics:
.. . . . . . . .. . ... . . .
J :
- lO ~107 831 raw material base: SBR + NR
ASTM grade: RE 43 strain-hardness: 63 - 91 kPa compression strain test: 45 - 55 %
raw density: 160 - 240 kg/m3.
The material of the lower layer 7 has a restoring ability which is greater than that of the upper layer, however, smaller than that of the intermediate layer. All the layers are bonded to one another and in the footbed in a suitable manner.
`~:
The rigid sole 8 can consist of hard paper (Pertinax), for example. This ~` is a thin material with a high strength and a low weight. The thickness is about 3 mm. Such a rigid sole distributes the compression stress .~, -, 15 uniformlY
,,, ~ Figure 3 shows a cross-section through the shaft material for the shoe.
.~
; Also the shaft material is upholstered correspondingly in order to avoid compression stresses of the foot. From the outside to the inside it ,"~ 20 consists of a nappa leather layer 10, a reinforcing band 11, a cushion layer 12 of closed-cell foam rubber with a thickness of about 3 mm and a s~ layer 13 of lining leather tanned in a vegetabile manner.
For comparison purposes, also cushions with four and five layers have been tested. Different cushion grades and cushion arrangements were used. However, the same did not result in an improved effect compared - with the three-layer cushion. Accordingly, additional cushion layers can be used, however, the three-layer cushion is completely sufficient.
~ 30 ,~;
- ll 21~7 83~
Figure 4 shows a part plan view and a cross-sectional view through the heel portion of the shoe. As one can see from the figure, the footbed has a longitudinal arch-support 14 which merges into a heel inclination which is indicated at 15. The transition is areally so that punctual stresses are avoided. The cross-section through the heel portion shows that the heel inclination 15 extends over about half of the heel portion in longitudinal direction and ascends from the center of the heel portion up to the inner edge of the same. Accordingly, the heel inclination 15 gradually merges into the shell edge of the footbed.
, ~;
...
., "
, ~
;~,,;, :.-~,.
:
.
~ , . . ...
~ ,, .
Claims (15)
1. A shoe, especially for diabetics or rheumatics, comprising a footbed, a cover layer on the footbed, a cushion portion disposed in the footbed, especially in the middlefoot range, heel range and/or toe range, and an intermediate sole, characterized in that the cushion portion (3) has a multi-layer structure and includes a soft upper layer (5), a hard intermediate layer (6) and a medium hard lower layer (7).
2. The shoe according to claim 1, characterized in that the upper and lower layers (5, 6) extend over the whole footbed (1), while the lower layer (7) is areally confined and especially covers only the middlefoot range, heel range and/or toe range.
3. The shoe according to claim 1 or 2, characterized in that the upper layer (5) has a thickness of 1 - 3 mm, the intermediate layer (6) has a thickness of 2 - 4 mm and the lower layer (7) has a thickness of 5 - 7 mm.
4. The shoe according to one of the preceding claims, characterized in that the upper layer (5) consists of open-cell foam rubber with low restoring ability, the intermediate layer (6) consists of closed-cell foam rubber with high restoring ability and the lower layer (7) consists of open-cell foam rubber with medium restoring ability.
5. The shoe according to one of the preceding claims, characterized in that the footbed (1) is ground in a roll-like manner fore and aft.
6. The shoe according to one of the preceding claims, characterized in that the intermediate sole (8) is formed as stiff sole or as rigidifying sole.
7. The shoe according to one of the claims 1 to 5, characterized in that the intermediate sole is formed as soft sole.
8. The shoe according to one of the preceding claims, characterized in that the intermediate sole (8) is disposed within a hollow space of the footbed (1).
9. The shoe according to one of the preceding claims, characterized in that a fourth layer consisting of a deformable cushioning material is disposed between the three-layer structure of the cushion portion and the intermediate sole.
10. The shoe according to one of the preceding claims, characterized in that it has a shaft which includes, from the outside to the inside, a leather layer (10), a reinforcing band (11), a cushion layer (12) and a lining leather layer (13).
11. The shoe according to one of the preceding claims, characterized in that the footbed is provided with a longitudinal arch-support (14).
? 14 ?
? 14 ?
12. The shoe according to one of the preceding claims, characterized in that the footbed has a heel inclination (15).
13. The shoe according to claim 12, characterized in that the heel inclination (15) extends over approximately the half of the heel range of the footbed and ascends towards the inner edge of the footbed.
14. An insole for a shoe, especially for diabetics and rheumatics, characterized in that it includes a cushion portion with multi-layer structure according to one of the preceding claims.
15. The insole according to claim 14, characterized in that it has a heel inclination.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEP4233661.9 | 1992-10-07 | ||
| DE4233661 | 1992-10-07 | ||
| DEP4239363.9 | 1992-11-24 | ||
| DE4239363A DE4239363A1 (en) | 1992-10-07 | 1992-11-24 | shoe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2107831A1 true CA2107831A1 (en) | 1994-04-08 |
Family
ID=25919243
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002107831A Abandoned CA2107831A1 (en) | 1992-10-07 | 1993-10-06 | Shoe |
Country Status (9)
| Country | Link |
|---|---|
| EP (1) | EP0591909B1 (en) |
| JP (1) | JPH06277105A (en) |
| AT (1) | ATE126975T1 (en) |
| AU (1) | AU663414B2 (en) |
| CA (1) | CA2107831A1 (en) |
| DE (2) | DE9217169U1 (en) |
| DK (1) | DK0591909T3 (en) |
| ES (1) | ES2078093T3 (en) |
| GR (1) | GR3018265T3 (en) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4320386A1 (en) * | 1993-06-19 | 1994-12-22 | Juergen Stumpf | Footbed, in particular an insert for people suffering from diabetes |
| US5787610A (en) * | 1996-05-29 | 1998-08-04 | Jeffrey S. Brooks, Inc. | Footwear |
| US5946825A (en) * | 1997-01-31 | 1999-09-07 | Nine West Group, Inc. | Footwear having slow recovery liner |
| US8166674B2 (en) | 2009-08-03 | 2012-05-01 | Hbn Shoe, Llc | Footwear sole |
| US10390587B2 (en) | 2016-03-01 | 2019-08-27 | Hbn Shoe, Llc | Device for high-heeled shoes and method of constructing a high-heeled shoe |
| US10477915B2 (en) | 2016-03-01 | 2019-11-19 | Hbn Shoe, Llc | Device for high-heeled shoes and method of constructing a high-heeled shoe |
| US10702008B2 (en) | 2018-02-26 | 2020-07-07 | Hbn Shoe, Llc | Device and method of constructing shoes |
| US20220142297A1 (en) * | 2020-11-09 | 2022-05-12 | National Taiwan University Of Science And Technology | Shoe midsole with variable dimension helical spring made by additive manufacturing process |
| US11540588B1 (en) | 2021-11-24 | 2023-01-03 | Hbn Shoe, Llc | Footwear insole |
| US11805850B1 (en) | 2023-07-19 | 2023-11-07 | Hbn Shoe, Llc | Cuboid pad |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE828294C (en) * | 1950-10-31 | 1952-01-17 | Alois Zwahl | Orthopedic insole |
| US2917848A (en) * | 1957-08-21 | 1959-12-22 | William M Scholl | Light weight foot supporting device |
| US3253600A (en) * | 1963-09-06 | 1966-05-31 | William M Scholl | Orthopedic inlay for footwear |
| US3730169A (en) * | 1971-03-08 | 1973-05-01 | T Fiber | Shoe inner sole and orthopedic support |
| US4266350A (en) * | 1979-08-20 | 1981-05-12 | Ormid Company | Footwear insole |
| US4338734A (en) * | 1980-02-22 | 1982-07-13 | Apex Foot Products Corp. | Universal orthotic |
| US4633877A (en) * | 1984-08-07 | 1987-01-06 | Duramet Systems, Inc. | Dynamic foot support and kit therefor |
| US4794707A (en) * | 1986-06-30 | 1989-01-03 | Converse Inc. | Shoe with internal dynamic rocker element |
-
1992
- 1992-11-24 DE DE9217169U patent/DE9217169U1/en not_active Expired - Lifetime
-
1993
- 1993-10-05 EP EP93116049A patent/EP0591909B1/en not_active Expired - Lifetime
- 1993-10-05 DE DE59300536T patent/DE59300536D1/en not_active Expired - Fee Related
- 1993-10-05 DK DK93116049.3T patent/DK0591909T3/en active
- 1993-10-05 AT AT93116049T patent/ATE126975T1/en active
- 1993-10-05 ES ES93116049T patent/ES2078093T3/en not_active Expired - Lifetime
- 1993-10-05 JP JP5274864A patent/JPH06277105A/en active Pending
- 1993-10-06 CA CA002107831A patent/CA2107831A1/en not_active Abandoned
- 1993-10-06 AU AU48855/93A patent/AU663414B2/en not_active Expired - Fee Related
-
1995
- 1995-11-30 GR GR950403382T patent/GR3018265T3/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| EP0591909B1 (en) | 1995-08-30 |
| DK0591909T3 (en) | 1995-12-18 |
| ES2078093T3 (en) | 1995-12-01 |
| GR3018265T3 (en) | 1996-02-29 |
| DE59300536D1 (en) | 1995-10-05 |
| ATE126975T1 (en) | 1995-09-15 |
| EP0591909A1 (en) | 1994-04-13 |
| AU4885593A (en) | 1994-04-21 |
| JPH06277105A (en) | 1994-10-04 |
| AU663414B2 (en) | 1995-10-05 |
| DE9217169U1 (en) | 1993-03-04 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Discontinued |