CA1186507A - Two density inclined sole running shoe - Google Patents
Two density inclined sole running shoeInfo
- Publication number
- CA1186507A CA1186507A CA000424646A CA424646A CA1186507A CA 1186507 A CA1186507 A CA 1186507A CA 000424646 A CA000424646 A CA 000424646A CA 424646 A CA424646 A CA 424646A CA 1186507 A CA1186507 A CA 1186507A
- Authority
- CA
- Canada
- Prior art keywords
- sole
- durometer material
- midsole
- thickness
- shoes
- 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.)
- Expired
Links
- 239000000463 material Substances 0.000 claims abstract description 30
- 238000010276 construction Methods 0.000 abstract description 4
- 230000035939 shock Effects 0.000 abstract description 4
- 230000002159 abnormal effect Effects 0.000 abstract description 3
- 230000003247 decreasing effect Effects 0.000 abstract description 2
- 241000469816 Varus Species 0.000 description 15
- 241001227561 Valgus Species 0.000 description 11
- 210000002683 foot Anatomy 0.000 description 10
- 230000007935 neutral effect Effects 0.000 description 7
- 210000003371 toe Anatomy 0.000 description 3
- 230000000386 athletic effect Effects 0.000 description 2
- BFMKFCLXZSUVPI-UHFFFAOYSA-N ethyl but-3-enoate Chemical compound CCOC(=O)CC=C BFMKFCLXZSUVPI-UHFFFAOYSA-N 0.000 description 2
- 241001360430 Achirus lineatus Species 0.000 description 1
- NLZUEZXRPGMBCV-UHFFFAOYSA-N Butylhydroxytoluene Chemical compound CC1=CC(C(C)(C)C)=C(O)C(C(C)(C)C)=C1 NLZUEZXRPGMBCV-UHFFFAOYSA-N 0.000 description 1
- 235000006696 Catha edulis Nutrition 0.000 description 1
- 240000007681 Catha edulis Species 0.000 description 1
- 241000269978 Pleuronectiformes Species 0.000 description 1
- 210000003484 anatomy Anatomy 0.000 description 1
- 230000037396 body weight Effects 0.000 description 1
- 230000002860 competitive effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 210000004744 fore-foot Anatomy 0.000 description 1
- 210000001255 hallux Anatomy 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229920000136 polysorbate Polymers 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- NQLVQOSNDJXLKG-UHFFFAOYSA-N prosulfocarb Chemical compound CCCN(CCC)C(=O)SCC1=CC=CC=C1 NQLVQOSNDJXLKG-UHFFFAOYSA-N 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A43—FOOTWEAR
- A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
- A43B13/00—Soles; Sole-and-heel integral units
- A43B13/02—Soles; Sole-and-heel integral units characterised by the material
- A43B13/12—Soles with several layers of different materials
-
- 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
- A43B13/143—Soles; Sole-and-heel integral units characterised by the constructive form provided with wedged, concave or convex end portions, e.g. for improving roll-off of the foot
-
- 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
- A43B13/143—Soles; Sole-and-heel integral units characterised by the constructive form provided with wedged, concave or convex end portions, e.g. for improving roll-off of the foot
- A43B13/148—Wedged end portions
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Footwear And Its Accessory, Manufacturing Method And Apparatuses (AREA)
Abstract
ABSTRACT
A pair of running shoes, each having an upper and a sole. The sole runs the length of the shoe from the heel to the toe and com-prises an outsole and a midsole, the midsole including a first member and a second member, each member being a variable thickness across the width thereof. The first member is disposed above the second member so that the combined thickness of the members is constant across the width of the sole. Each of the members is formed of a material having a different durometer, so that the ratio of the thickness of the higher durometer material relative to the lower durometer material is greatest immediately adjacent the inner side of the sole and is lowest immediately adjacent the outer side. This construction permits greater contact surface area than conventional shoes, thereby distributing impact shock more evenly during running, yet providing medialongitudinal arch support for decreasing abnormal pronation, while allowing for the natural pronation of the foot.
A pair of running shoes, each having an upper and a sole. The sole runs the length of the shoe from the heel to the toe and com-prises an outsole and a midsole, the midsole including a first member and a second member, each member being a variable thickness across the width thereof. The first member is disposed above the second member so that the combined thickness of the members is constant across the width of the sole. Each of the members is formed of a material having a different durometer, so that the ratio of the thickness of the higher durometer material relative to the lower durometer material is greatest immediately adjacent the inner side of the sole and is lowest immediately adjacent the outer side. This construction permits greater contact surface area than conventional shoes, thereby distributing impact shock more evenly during running, yet providing medialongitudinal arch support for decreasing abnormal pronation, while allowing for the natural pronation of the foot.
Description
1 TWO DENSITY IN~LINED SOLE RU_NING SHOE
This invention relates generally to athletic foot wear and more particularly to running shoes.
~arious athletic shoes particularly suited for running are commercially available. Such shoes commonly include what can be called a "neutral plane" sole, that is a sole which is of uniform thickness between the inner (varus) side of the shoe and the outer (valgus) side of -the .shoe. Such soles are also commonly ormed of unlform density between the varus and valgus s:idcs. The human anatomy is such that when a person runs~ or walks ~or khat matter, the rcar val~us portion oE l;he hcel o:~ cach ~oot makes initial contact during each step. The ground con-tacting foot then rolls inward, a process called pronation, whereupon the person's body weight is brought from the outside edge of the foot inward toward the center of the arch. The foot then rolls outwardly and toes off toward the great toe to complete a step.
It is widely recognized that the vast majorlty oE
runners e~hlbit improper pronation when running ln prlor art shoes llke those described above. Io that end, many people initially land on the outside of the heel of the ground contacting foot, with the foot rolling inward with improper biomechanical action and remainlng rolled inward.
Such improper action is referred to as overpronation. In addition, it has been shown that when running, three to four ti~es the gravitational Eorce is applied to the outside edge of the foot, and in particular to the heel area, than occurs when walking. The high force concentrated at the heel area, coupled with the tendency of most rwnners to roll their feet inward forcefully during running results in - 1-- , ~L~8~;5~7 1 increased shock to the foot and increased heel wear o-~ the shoe being worn.
In United States Patent No. 4,180,92~ ~Subotnick) issued January 1, 1980, assigned to the same assignee as this invention, there is disclosed and claimed a running shoe featuring a sole having a wedged portion can~ed upward in a transverse direction from the outer side of the shoe to the inner side of the shoe so that during running a substantial portion of the sole makes contact with the ground during each step. ~lthough this type o~ construct:ion remedies many of thc drawbacks ~associat~cl witll a COnV~
tionally cleslgned rullnillg sho~, thc physi.c.L:I canting o~E
the sole may not be desired by some runners, e.g., slow runners.
In United States Patent No. 4,364,188 (Turner et al.) issued ~ecember 21, 1982, assigned to the same assignee as this invention, there is disclosed and clalmed a running shoe ~8~
1 having a neutral plane sole including portions a-t the heel on ~he varus side which are of higher density (durometer) than the remaining portion of the sole in the interest o~ "rearfoot st.ability".
It is a general object of the instant invention to provide running shoes which overcome the disadvantages inherent in the prior art running shoes.
It is a further object of the instant invention to provide running shoes which distribute impac-t shock evenly during runn.ing, yet at the same -time employing a transversely level or "neutral plane" sole.
It is a further object o:E the instant :inv~ntion to pro-vide a pai.r o-f neutral plane runnincJ shoes, each Oe which prov.icle mean!; Eor lessening the abnormal proncltion o~ the oot as th~ arcl flattens during running.
I. is still a further object oE -the instan-t invention to pro~,ide a pair of running shoes, each of which having a neutral plane sole construction, which permits greater contact surface area t.han conventional shoes, thereby distr.ibuting impac-t shock more evenly during running, yet providi.ng medialongitudinal arch support for decreasing abnormal pronation, while ~I.lowing :Eor the natural proration of the foot.
. These and other ob~ec-ts of the instant invention are achieved by providing a pair of running shoes. Each of the shoes comprises an upper and a sole. The sole has an inner side and an outer side, with the width oE said sole being defi~ed there-between. The sole runs the length of ~he shoe from the heel to the toe and comprises an outsole and a midsole. The midsole 65~
1 includes a first member and a second member, each member being a var.iable thickness across the ~idth thereo-E. The first member is disposed above saia second member so tha-t the combined -thickness of said members is constant across the wid~h of said sole. Each o~ the members is formed of a material having a different durome~er, so that the ratio of the thicXness of th~ higher durometer material relative to the lower durome-ter material is greatest i~nediately adjacent the inner side of the sole and is lowest ir~nediately adjacent the outer side.
Other objects and many of the attendant advantages of the instant invention wi:Ll become readily apparent by re~rence to the accompanying draw.inss whereirl:
Fig. 1 is a p~rspect.ive view of the runn.ing ~loe of the inst2nt invention;
Fig. 2 is an enlarged sectional view taken along line 2-2 o Fig. l; and Fig. 3 is an enlarged sect.ional view taken along line 3-3 of ~ig. l.
Referring now to the various figures of the draw:ing wherein like reference charclcters reEer to like parts, -there .is shown at 20 in Fig. 1 a running shoe constructed in accordance with the instan-t invention. Shoe 20 is designed to be used by the competi-tive runner or recrea-tional jogger alike.
Each shoe basically comprises conventional upper 22 and a sole unit 24. The upper 22 has an inner or varus side 26 and an ou-ter or valgus side 28. The sole unit 24 runs the entire length of -the shoe ~rom the heel 30 to the toe 32 be-tween the varus and valgus si.des 26 and 28, respectively.
~ 3G5~7 1 In referring to Fig. 2 it can be seen that sole unit 24 comprises an outsole 34 and a midsole 36, The outsole is of conventional construc-tion and includes plural gripping elements or cleats 38.
The midsole is formed as a composite struc-ture and, as will be discribed in detail hereinaftter, is arranged to provide the over-pronation lessening characteristics exhibited by running shoes constructed in accordance with the teachings of the afore men,loned United States Patent No. 4,180,924 in a neutral plane sole. To that end the midsole 36 includes two layers, namely top layer 40 and bottom layer ~2. 'rhe layers extend for ~ s~lbstantial length o the sole betweell the heel ancl to a point ad~acent the front or the arch. Eac'h 1a~er :i6 Eormed o~ A resi:L:ient materia'l li.Xe that used in midsoles of conventional running shoes, except tha, -the hardness or durome-ter of each layer is different from the other.
In the embodirnent of the midsole shown in Fig. 2 the upper layer is of higher durometer material than the lower layer.
For exam~le, depending upon the type of shoe, the upper layer can have a durometer within the ran~e o ~5~ 10~, Shore ~,'while t'he lower Layer has a durometer within the range oE 35-~ 10~, Shore ~.
The midsole layers 36 are preferably made of ethyl vinyl acetate (EVA) but alternatively, may be made of polyurethane or any number of other ma~erials used in running shoes.
The thickness oE each layer varies across the width oE
the sole, i.e., between the varus and valgus sides, but with the combined -thickness oE both layers being cons-tant across said width. This feature ensures that the sole is of the "neu-tral plane" type.~
-- 5 ~
65¢3~
1 The ]ayers 40 and 42 are cons-tructed so -that the layer having the thicker portion contiguous wi-th the varus side is of the higher durometer ma-terial. Accordingly -the hardness of the midsole contiguous with -the Var~l5 side oE the sole is hiyher than that of the valgus side. With such a construction, during the pronation phase of each running step the varus side of the shoe does no-t compress as readily as the valgus side. Therefore, the abnornal tendency toward over pronation is obvia-ted or at least minimized.
In the embodimen-t of Fig. 2, the top layer 40, which is forme~ of higher densiiy material tapers linearly in thicXness Erom .~e varus side to the valgus side, with the ratio of the higher clensity materlal to the lower density material being ap~ro~imately 3 to 1 adjacent the varus side and approxima-tely 1 to 3 a_jacent ~he ~algus side. Conversely the lower layer 42, whicn is formed OL the lower density material, tapers linearly in thi_kness from the valgus side to the varus side. The degree o-E
taper of both laye}s is the same. The layers are adhesively secured along .heir interface 44. The top surface 46 of the -top layer 40 and the bottom surface 48 of the bottom layer are disposed hori~ontally so that the combined overall -thickness of two layers of the midsole 36 in a transverse direction across the width of the sole is constan-t.
An alternative embodiment of the midsole o-f the instant:
invention is shown in Fig. 3 wherein the higher density and lower density materials, forming the two layers of -the midsole are transposed. i~ccordingly in this embodiment -the top layer 40 is formed of the lower density material and tapers from the valgus .~!L~ Ei5~
1 side -to varus side, while tlle bottom layer 42 is formed of the higher density material and tapers from the varus side to the valgus side.
As is conventional, the midsole 36 is thicker under the heel of the upper and tapers downward longit:udinal under the arch toward the forefoot area, to provide the necessary heel lift or elevation for comfortable, safe running. The total thickness of midsole 36 is between 1.5 cm and 2.5 cm at its -thickest ~or-tion, with the exact thickness varying depending on several factors, such as the type of running intended (e.g., racing, recreational jogging, etc.) and the personal preference of the wearer.
It must be pointecl out at this juncture that the two layers 40 and 4~ need not taper linearly, ~s sllown .in Fi~s. 2 ~ncl 3, ~or neecl they be of correspollc1ing thickn~sse~ tap~r:i.n~ in opp~site directions, 50 loncl as the ratio Oe the tllickness oE th~
high~r durometer material relative to the lower durometer ma-terial is .~ eatPst adjac~nt the varus side, e,g., the layer of higher density has its thic~er sicle at the varus side of the sole, and the top surface of the top layer is substantially horizontal in the -transverse direction when -the outsole is flat on a horizontal running surface. Moreover, the two layers need not be formed as separate units which are secured toge-ther.
Without Eurther elaboration, the foregoi.ng will so fully illustrate my invention that others may, by applying current or future knowledge, readily adop-t the same for use under various conditions of service.
This invention relates generally to athletic foot wear and more particularly to running shoes.
~arious athletic shoes particularly suited for running are commercially available. Such shoes commonly include what can be called a "neutral plane" sole, that is a sole which is of uniform thickness between the inner (varus) side of the shoe and the outer (valgus) side of -the .shoe. Such soles are also commonly ormed of unlform density between the varus and valgus s:idcs. The human anatomy is such that when a person runs~ or walks ~or khat matter, the rcar val~us portion oE l;he hcel o:~ cach ~oot makes initial contact during each step. The ground con-tacting foot then rolls inward, a process called pronation, whereupon the person's body weight is brought from the outside edge of the foot inward toward the center of the arch. The foot then rolls outwardly and toes off toward the great toe to complete a step.
It is widely recognized that the vast majorlty oE
runners e~hlbit improper pronation when running ln prlor art shoes llke those described above. Io that end, many people initially land on the outside of the heel of the ground contacting foot, with the foot rolling inward with improper biomechanical action and remainlng rolled inward.
Such improper action is referred to as overpronation. In addition, it has been shown that when running, three to four ti~es the gravitational Eorce is applied to the outside edge of the foot, and in particular to the heel area, than occurs when walking. The high force concentrated at the heel area, coupled with the tendency of most rwnners to roll their feet inward forcefully during running results in - 1-- , ~L~8~;5~7 1 increased shock to the foot and increased heel wear o-~ the shoe being worn.
In United States Patent No. 4,180,92~ ~Subotnick) issued January 1, 1980, assigned to the same assignee as this invention, there is disclosed and claimed a running shoe featuring a sole having a wedged portion can~ed upward in a transverse direction from the outer side of the shoe to the inner side of the shoe so that during running a substantial portion of the sole makes contact with the ground during each step. ~lthough this type o~ construct:ion remedies many of thc drawbacks ~associat~cl witll a COnV~
tionally cleslgned rullnillg sho~, thc physi.c.L:I canting o~E
the sole may not be desired by some runners, e.g., slow runners.
In United States Patent No. 4,364,188 (Turner et al.) issued ~ecember 21, 1982, assigned to the same assignee as this invention, there is disclosed and clalmed a running shoe ~8~
1 having a neutral plane sole including portions a-t the heel on ~he varus side which are of higher density (durometer) than the remaining portion of the sole in the interest o~ "rearfoot st.ability".
It is a general object of the instant invention to provide running shoes which overcome the disadvantages inherent in the prior art running shoes.
It is a further object of the instant invention to provide running shoes which distribute impac-t shock evenly during runn.ing, yet at the same -time employing a transversely level or "neutral plane" sole.
It is a further object o:E the instant :inv~ntion to pro-vide a pai.r o-f neutral plane runnincJ shoes, each Oe which prov.icle mean!; Eor lessening the abnormal proncltion o~ the oot as th~ arcl flattens during running.
I. is still a further object oE -the instan-t invention to pro~,ide a pair of running shoes, each of which having a neutral plane sole construction, which permits greater contact surface area t.han conventional shoes, thereby distr.ibuting impac-t shock more evenly during running, yet providi.ng medialongitudinal arch support for decreasing abnormal pronation, while ~I.lowing :Eor the natural proration of the foot.
. These and other ob~ec-ts of the instant invention are achieved by providing a pair of running shoes. Each of the shoes comprises an upper and a sole. The sole has an inner side and an outer side, with the width oE said sole being defi~ed there-between. The sole runs the length of ~he shoe from the heel to the toe and comprises an outsole and a midsole. The midsole 65~
1 includes a first member and a second member, each member being a var.iable thickness across the ~idth thereo-E. The first member is disposed above saia second member so tha-t the combined -thickness of said members is constant across the wid~h of said sole. Each o~ the members is formed of a material having a different durome~er, so that the ratio of the thicXness of th~ higher durometer material relative to the lower durome-ter material is greatest i~nediately adjacent the inner side of the sole and is lowest ir~nediately adjacent the outer side.
Other objects and many of the attendant advantages of the instant invention wi:Ll become readily apparent by re~rence to the accompanying draw.inss whereirl:
Fig. 1 is a p~rspect.ive view of the runn.ing ~loe of the inst2nt invention;
Fig. 2 is an enlarged sectional view taken along line 2-2 o Fig. l; and Fig. 3 is an enlarged sect.ional view taken along line 3-3 of ~ig. l.
Referring now to the various figures of the draw:ing wherein like reference charclcters reEer to like parts, -there .is shown at 20 in Fig. 1 a running shoe constructed in accordance with the instan-t invention. Shoe 20 is designed to be used by the competi-tive runner or recrea-tional jogger alike.
Each shoe basically comprises conventional upper 22 and a sole unit 24. The upper 22 has an inner or varus side 26 and an ou-ter or valgus side 28. The sole unit 24 runs the entire length of -the shoe ~rom the heel 30 to the toe 32 be-tween the varus and valgus si.des 26 and 28, respectively.
~ 3G5~7 1 In referring to Fig. 2 it can be seen that sole unit 24 comprises an outsole 34 and a midsole 36, The outsole is of conventional construc-tion and includes plural gripping elements or cleats 38.
The midsole is formed as a composite struc-ture and, as will be discribed in detail hereinaftter, is arranged to provide the over-pronation lessening characteristics exhibited by running shoes constructed in accordance with the teachings of the afore men,loned United States Patent No. 4,180,924 in a neutral plane sole. To that end the midsole 36 includes two layers, namely top layer 40 and bottom layer ~2. 'rhe layers extend for ~ s~lbstantial length o the sole betweell the heel ancl to a point ad~acent the front or the arch. Eac'h 1a~er :i6 Eormed o~ A resi:L:ient materia'l li.Xe that used in midsoles of conventional running shoes, except tha, -the hardness or durome-ter of each layer is different from the other.
In the embodirnent of the midsole shown in Fig. 2 the upper layer is of higher durometer material than the lower layer.
For exam~le, depending upon the type of shoe, the upper layer can have a durometer within the ran~e o ~5~ 10~, Shore ~,'while t'he lower Layer has a durometer within the range oE 35-~ 10~, Shore ~.
The midsole layers 36 are preferably made of ethyl vinyl acetate (EVA) but alternatively, may be made of polyurethane or any number of other ma~erials used in running shoes.
The thickness oE each layer varies across the width oE
the sole, i.e., between the varus and valgus sides, but with the combined -thickness oE both layers being cons-tant across said width. This feature ensures that the sole is of the "neu-tral plane" type.~
-- 5 ~
65¢3~
1 The ]ayers 40 and 42 are cons-tructed so -that the layer having the thicker portion contiguous wi-th the varus side is of the higher durometer ma-terial. Accordingly -the hardness of the midsole contiguous with -the Var~l5 side oE the sole is hiyher than that of the valgus side. With such a construction, during the pronation phase of each running step the varus side of the shoe does no-t compress as readily as the valgus side. Therefore, the abnornal tendency toward over pronation is obvia-ted or at least minimized.
In the embodimen-t of Fig. 2, the top layer 40, which is forme~ of higher densiiy material tapers linearly in thicXness Erom .~e varus side to the valgus side, with the ratio of the higher clensity materlal to the lower density material being ap~ro~imately 3 to 1 adjacent the varus side and approxima-tely 1 to 3 a_jacent ~he ~algus side. Conversely the lower layer 42, whicn is formed OL the lower density material, tapers linearly in thi_kness from the valgus side to the varus side. The degree o-E
taper of both laye}s is the same. The layers are adhesively secured along .heir interface 44. The top surface 46 of the -top layer 40 and the bottom surface 48 of the bottom layer are disposed hori~ontally so that the combined overall -thickness of two layers of the midsole 36 in a transverse direction across the width of the sole is constan-t.
An alternative embodiment of the midsole o-f the instant:
invention is shown in Fig. 3 wherein the higher density and lower density materials, forming the two layers of -the midsole are transposed. i~ccordingly in this embodiment -the top layer 40 is formed of the lower density material and tapers from the valgus .~!L~ Ei5~
1 side -to varus side, while tlle bottom layer 42 is formed of the higher density material and tapers from the varus side to the valgus side.
As is conventional, the midsole 36 is thicker under the heel of the upper and tapers downward longit:udinal under the arch toward the forefoot area, to provide the necessary heel lift or elevation for comfortable, safe running. The total thickness of midsole 36 is between 1.5 cm and 2.5 cm at its -thickest ~or-tion, with the exact thickness varying depending on several factors, such as the type of running intended (e.g., racing, recreational jogging, etc.) and the personal preference of the wearer.
It must be pointecl out at this juncture that the two layers 40 and 4~ need not taper linearly, ~s sllown .in Fi~s. 2 ~ncl 3, ~or neecl they be of correspollc1ing thickn~sse~ tap~r:i.n~ in opp~site directions, 50 loncl as the ratio Oe the tllickness oE th~
high~r durometer material relative to the lower durometer ma-terial is .~ eatPst adjac~nt the varus side, e,g., the layer of higher density has its thic~er sicle at the varus side of the sole, and the top surface of the top layer is substantially horizontal in the -transverse direction when -the outsole is flat on a horizontal running surface. Moreover, the two layers need not be formed as separate units which are secured toge-ther.
Without Eurther elaboration, the foregoi.ng will so fully illustrate my invention that others may, by applying current or future knowledge, readily adop-t the same for use under various conditions of service.
Claims (10)
IS CLAIMED ARE DEFINED AS FOLLOWS:
1. A pair of running shoes, each of said shoes compri-sing an upper and a sole, said sole having an inner side and an outer side, with the width of said sole being defined there-between, said sole running the length of the shoe from the heel to the toe, said sole comprising an outsole and a midsole, said midsole including a first member and a second member, each member being a variable thickness across the width thereof, said first member being disposed about said second member so that the combined thickness of said members is constant across the width of said sole, each of said members being formed of a material having a different durometer, so that the ratio of the thickness of the higher durometer material relative to the lower durometer material is greatest immediately adjacent the inner side of the sole and is lowest immediately adjacent the outer side.
2. The shoes of Claim 1, wherein the ratio of the thickness of the lower durometer material to the higher durometer material is variable from the outer side of the shoe to the inner side of the shoe over the portion of the sole region extending the full length of the heel to a point adjacent the arch of the wearers foot, said ratio being constant over the remaining portion of the sole.
3. The running shoes of Claim 2, wherein the ratio of relative thicknesses of the two materials varies linearly
4. The running shoes of Claim 2, wherein the midsole is constructed such that the higher durometer material is on top of the lower durometer material.
5. The running shoes of Claim 2, wherein the midsole is constructed so that the lower durometer material is on top of the higher durometer material.
6. The running shoes of Claim 4, wherein said higher durometer material is 45 ? 10%, Shore A, and said lower durometer material is 35 ? 10%, Shore A, durometer.
7. The running shoes of Claim 5, wherein said higher durometer material is 45 ? 10% Shore A, and wherein said lower durometer material is 35 ? 10%, Shore A.
8. The running shoes of Claim 6, wherein the thickness of the midsole is greater in the heel portion then in the toe portion.
9. The running shoes of Claim 7, wherein the thickness of the midsole is greater in the heel portion than in the toe portion.
10. The running shoes of Claim 3 wherein the higher durometer material is 45 ? 10%, Shore A, and said lower durometer material is 35 ? 10%, Shore A.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US37040082A | 1982-04-21 | 1982-04-21 | |
| US370,400 | 1982-04-21 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1186507A true CA1186507A (en) | 1985-05-07 |
Family
ID=23459478
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000424646A Expired CA1186507A (en) | 1982-04-21 | 1983-03-28 | Two density inclined sole running shoe |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP0092366B1 (en) |
| JP (1) | JPS58190401A (en) |
| CA (1) | CA1186507A (en) |
| DE (1) | DE3360348D1 (en) |
Families Citing this family (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6155808U (en) * | 1984-09-17 | 1986-04-15 | ||
| FR2598293B1 (en) * | 1986-05-09 | 1988-09-09 | Salomon Sa | GOLF SHOE |
| US6108943A (en) * | 1998-01-30 | 2000-08-29 | Nike, Inc. | Article of footwear having medial and lateral sides with differing characteristics |
| JP3215664B2 (en) | 1998-05-22 | 2001-10-09 | 美津濃株式会社 | Midsole structure for sports shoes |
| JP3238132B2 (en) * | 1998-10-02 | 2001-12-10 | 美津濃株式会社 | Midsole structure for sports shoes |
| FR2819385B1 (en) * | 2001-01-12 | 2004-01-09 | Salomon Sa | MIDSOLE AND SHOE EQUIPPED WITH SUCH SOLE |
| DE10112821B9 (en) * | 2001-03-16 | 2004-10-28 | Adidas International Marketing B.V. | Sole and shoe |
| HUP0800101A2 (en) * | 2008-02-18 | 2011-11-28 | Laszlo Solymosi | Shoes with unstable sole construction |
| US7877897B2 (en) | 2008-12-16 | 2011-02-01 | Skechers U.S.A., Inc. Ii | Shoe |
| US8316558B2 (en) | 2008-12-16 | 2012-11-27 | Skechers U.S.A., Inc. Ii | Shoe |
| KR100992423B1 (en) * | 2010-06-29 | 2010-11-08 | 양철호 | Footwear sole |
| WO2013145218A1 (en) * | 2012-03-29 | 2013-10-03 | 株式会社アシックス | Shoe sole suited for walking |
| WO2014141467A1 (en) | 2013-03-15 | 2014-09-18 | 株式会社アシックス | Midsole having a laminated structure |
| JP5976915B2 (en) * | 2015-11-26 | 2016-08-24 | 株式会社アシックス | Midsole with laminated structure |
| JP6295386B1 (en) * | 2017-05-08 | 2018-03-14 | 周平 宮田 | New heel assembly and footwear comprising the same |
| US11700911B2 (en) | 2018-05-18 | 2023-07-18 | Asics Corporation | Shoe sole including laminate-structured midsole |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3738373A (en) * | 1971-08-11 | 1973-06-12 | J Glancy | Shoe heel with cushion wedge |
| CA920352A (en) * | 1972-02-03 | 1973-02-06 | P. White Thomas | Athletic boot having improved counters |
| US4316334A (en) * | 1980-03-27 | 1982-02-23 | Hunt Helen M | Athletic shoe including stiffening means for supporting the rear portion of the first metatarsal bone |
| US4364189A (en) * | 1980-12-05 | 1982-12-21 | Bates Barry T | Running shoe with differential cushioning |
-
1983
- 1983-03-28 CA CA000424646A patent/CA1186507A/en not_active Expired
- 1983-04-12 DE DE8383302053T patent/DE3360348D1/en not_active Expired
- 1983-04-12 EP EP19830302053 patent/EP0092366B1/en not_active Expired
- 1983-04-18 JP JP6825283A patent/JPS58190401A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| DE3360348D1 (en) | 1985-08-08 |
| JPS58190401A (en) | 1983-11-07 |
| EP0092366B1 (en) | 1985-07-03 |
| JPS6235762B2 (en) | 1987-08-04 |
| EP0092366A1 (en) | 1983-10-26 |
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| MKEC | Expiry (correction) | ||
| MKEX | Expiry |