Source: http://www.google.com/patents/US7823298?dq=5958006
Timestamp: 2016-10-21 18:48:43
Document Index: 460546656

Matched Legal Cases: ['art 50', 'art 50', 'art 50', 'art 50', 'art 50', 'art 50']

Patent US7823298 - Athletic shoes having an upper whose fitting property is improved - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign inPatentsThe present invention relates to the upper U of an athletic shoe comprising a first opening 1 out of which the foot sticks upwards during wearing and a second opening 2 which is closed with a tongue. The two openings 1, 2 are continuous with each other, and the upper U comprises a medial side stretchable...http://www.google.com/patents/US7823298?utm_source=gb-gplus-sharePatent US7823298 - Athletic shoes having an upper whose fitting property is improvedAdvanced Patent SearchTry the new Google Patents, with machine-classified Google Scholar results, and Japanese and South Korean patents.Publication numberUS7823298 B2Publication typeGrantApplication numberUS 10/547,645PCT numberPCT/JP2004/005335Publication dateNov 2, 2010Filing dateApr 14, 2004Priority dateApr 24, 2003Fee statusPaidAlso published asDE112004000536T5, US8713821, US20060162190, US20110041362, WO2004093587A1Publication number10547645, 547645, PCT/2004/5335, PCT/JP/2004/005335, PCT/JP/2004/05335, PCT/JP/4/005335, PCT/JP/4/05335, PCT/JP2004/005335, PCT/JP2004/05335, PCT/JP2004005335, PCT/JP200405335, PCT/JP4/005335, PCT/JP4/05335, PCT/JP4005335, PCT/JP405335, US 7823298 B2, US 7823298B2, US-B2-7823298, US7823298 B2, US7823298B2InventorsTsuyoshi Nishiwaki, Noboru Nakabe, Kiyomitsu Kurosaki, Toshikazu KayanoOriginal AssigneeAsics CorporationExport CitationBiBTeX, EndNote, RefManPatent Citations (75), Non-Patent Citations (3), Referenced by (15), Classifications (14), Legal Events (2) External Links: USPTO, USPTO Assignment, EspacenetAthletic shoes having an upper whose fitting property is improved
In the present invention, by the use of the term “the region essentially corresponding to a top edge of distal caput (head) of a fifth metatarsal bone”, it is meant to include not only the region just corresponding to the top edge of the distal caput of the fifth metatarsal bone but also its surrounding vicinity. Accordingly, for example, even if the lateral side stretchable part extends from a location slightly above the region just corresponding the top edge of the distal caput of the fifth metatarsal bone to the second opening, the lateral side stretchable part is provided in the area from the region essentially corresponding to the top edge of the distal caput of the fifth metatarsal bone to the second opening.
In the present invention by the use of the term “essentially cross one of side faces of the upper from the top surface of the sole to the second opening” it is meant that a stretchable member is provided from the top surface of the sole to the second opening on the side face of the upper so as to allow a part of the upper along a rim of the second opening to stretch and contract. Therefore, for example, even if an eyelet stay is provided with the upper along the rim of the second opening, a part of the eyelet stay is notched and the lateral side face of the notched portion is merely covered with cloth and so on, the stretchable member “essentially cross” the side of the upper.
In the present invention, by the use of the term “material which is substantially difficult to stretch” or “material which is substantially inelastic”, it is meant to include the materials of which ordinary athletic shoes uppers are formed, and which have a Young's modulus greater than the stretchable parts.
By the use of the term “cloth” herein it is meant a sheet-like material of which the upper of the shoe is formed and can include a sheet of rubber or resin, woven fabric, knitted fabric and/or nonwoven fabric.
Further, in order to prevent unnecessary stretching and to provide sufficient stretch of the lateral side stretchable part 50, the “elastic constant” k per unit height W (FIG. 15( a)) of the lateral side stretchable part 50 is preferably set between about 0.1 N/mm and 50 N/mm. Said “elastic constant” is defined as a value obtained by cutting the stretchable part into a test piece which is slender and long in the lengthwise direction of the foot, applying a load f in the longitudinal direction to the test piece and dividing the load f by a strain ε of the test piece and a width W of the test piece. That is ,this “elastic constant” k is given by the following expression (1).
The reason why conception of above “elastic constant” is introduced is that thickness of material of the upper cannot be ambiguous. That is, the correct thickness of the upper is difficult to measure. Therefore, it is different to obtain the correct value of the following Young's modulus of the material of the upper. The “elastic constant” k can be obtained without measuring the correct thickness of the material of the upper. Young's modulus is obtained by dividing the load f by a strain ε of the test piece and a transverse sectional area S of the test piece. That is, Young's modulus E is given by the following expression (2).
Preferred values of the “elastic constant” k vary with the shape, size and type of shoe and the shape and size of the stretchable parts. For example, it is preferable to set said “elastic constant” k approximately between 0.1 N/mm and 7.0 N/mm in the shoes shown in FIG. 1 to FIG. 11( b), FIG. 14.(a) to FIG. 14.(c). In the running shoes shown in FIG. 1 to FIG. 11( b), it is preferred to set the “elastic constant” k approximately between 0.1 N/mm and 3.0 N/mm. In the athletic shoes for court sports shown in FIG. 12( a) to FIG. 13( b), it is preferable to set the “elastic constant” k approximately between 10 N/mm and 30 N/mm. In the trail shoe shown in FIG. 14( a) to FIG. 14( c), it is preferable to set the “elastic constant” k approximately between 1.0 N/mm and 7.0 N/mm.
These specific values of the “elastic constant” k are supposed to be set larger than the “elastic constant” k of conventional stretchable material. In the present invention, the stretchable part 50 is necessarily formed to have a certain length in the lengthwise direction L of the foot. Accordingly, when the stretchable part 50 is formed to be too stretchable, the function of the upper U to keep the stability of the foot decrease too much. Because of this, the “elastic constant” k of the stretchable part 50 is set large to a certain extent, according as the stretchable part 50 is formed to have said length in the lengthwise direction L of the foot.
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