Patent US4654983A successfully refreshed from Google Patents.
US4654983A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sole construction for footwear
Assignee: BARCLAYS BUSINESS CREDIT Inc
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Filing: 1985-12-26
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Granted: 1987-04-07
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Expires: 2005-12-26
Abstract
Abstract The manufacture of a sole unit for footwear, such as an athletic shoe including an integral midsole/wedge or a separable wedge for use with a midsole. The integral midsole/wedge unit and the separable wedge comprise a shell and a core at least partially encapsulated within the shell. In the manufacture the core is supported in a mold by a plurality of pins extending from an upper and lower mold half toward a parting line; or the core is supported on one or the other of an outsole or insole of the sole unit and closed in the mold. The material of the shell is poured or injected into the mold.
Inventors
- 👤 Kenneth W. Graham
- 👤 Edward J. Norton
- 👤 Shuhei Kurata
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 13:54
CPC Classifications
A; A43; A43B; A43B13/00; A43B13/02; A43B13/12; A43B13/38; A43B5/00; A43B5/06
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
121 words
A midsole for use in the sole unit of footwear, such as an athletic shoe comprising a core composed of plastic material which is light of weight, providing a characteristic of springiness, and a shell also composed of plastic material more dense than the plastic material of said core, said shell being molded and partially disposed about said core covering one of its opposed surfaces throughout and extending to but substantially not beyond the plane including the other opposed surface thereby to cover the entire peripheral side of said core between surfaces, leaving substantially uncovered the other of the opposed surfaces, and said shell serving at least to maintain integrity and prevent break down and/or compression of said core under stress.
Claim 2
Dependent Claim
121 words
A midsole for use in the sole unit of footwear, such as an athletic shoe comprising a core composed of plastic material which is light of weight, providing a characteristic of springiness, and a shell also composed of plastic material more dense than the plastic material of said core, said shell being molded and partially disposed about said core covering one of its opposed surfaces throughout and extending to but substantially not beyond the plane including the other opposed surface thereby to cover the entire peripheral side of said core between surfaces, leaving substantially uncovered the other of the opposed surfaces, and said shell serving at least to maintain integrity and prevent break down and/or compression of said core under stress.
Claim 3
Dependent Claim
19 words
The midsole of claim 1 wherein said uncovered surface of said core faces the upper of said athletic shoe.
Claim 4
Dependent Claim
21 words
The midsole of claim 1 wherein said uncovered surface of said core faces away from the upper of said athletic shoe.
Claim 5
Dependent Claim
18 words
The midsole of any one of claims 2 or 3 further comprised of an integral heel wedge portion.
Claim 6
Dependent Claim
24 words
The midsole of claim 2 further comprised of an integral heel wedge portion, and wherein said core is located within said heel wedge portion.
Claim 7
Dependent Claim
46 words
The midsole of claim 1 wherein said core is composed of a first plastic material having a durometer reading (Shore A) of at least 15, and said shell is composed of a second, different plastic material having a durometer reading (Shore A) of at least 20.
Claim 8
Dependent Claim
26 words
The midsole of any one of claims 1, 5 and 6 wherein said core is composed of ethylene-vinyl acetate polymer, and said shell is composed polyurethane.
Claim 9
Dependent Claim
121 words
A wedge for use in the sole unit of footwear, such as an athletic shoe comprising a core composed of plastic material which is light of weight, providing a characteristic of springiness, and a shell also composed of plastic material more dense than the plastic material of said core, said shell being molded and partially disposed about said core covering one of its opposed surfaces throughout and extending to but substantially not beyond the plane including the other opposed surface thereby to cover the entire peripheral side of said core between surfaces, leaving substantially uncovered the other of the opposed surfaces, and said shell serving at least to maintain integrity and prevent break down and/or compression of said core under stress.
Claim 10
Dependent Claim
121 words
A wedge for use in the sole unit of footwear, such as an athletic shoe comprising a core composed of plastic material which is light of weight, providing a characteristic of springiness, and a shell also composed of plastic material more dense than the plastic material of said core, said shell being molded and partially disposed about said core covering one of its opposed surfaces throughout and extending to but substantially not beyond the plane including the other opposed surface thereby to cover the entire peripheral side of said core between surfaces, leaving substantially uncovered the other of the opposed surfaces, and said shell serving at least to maintain integrity and prevent break down and/or compression of said core under stress.
Claim 11
Dependent Claim
23 words
The wedge of claim 8 in combination with a midsole, and wherein the uncovered surface of said core is positioned juxtaposed said midsole.
Claim 12
Dependent Claim
46 words
The wedge of claim 8 wherein said core is composed of a first plastic material having a durometer reading (Shore A) of at least 15, and said shell is composed of a second, different plastic material having a durometer reading (Shore A) of at least 20.
Claim 13
Dependent Claim
21 words
The wedge of claim 10 wherein said core is composed of ethylene-vinyl acetate polymer, and said shelll is composed of polyurethane.
Claim 14
Dependent Claim
43 words
Footwear in the form of an athletic shoe including a sole unit having an outsole and one of a midsole and wedge recited in one of claims 5 and 8, and an upper received on said sole unit having a foot receiving opening.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-04-06 | 1990-10-06 | 1991-04-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-04-06 | 1994-10-06 | 1995-04-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-04-06 | 1998-10-06 | 1999-04-07 | $7700.00 | Window Closed / Lapsed |