Patent US4843735A successfully refreshed from Google Patents.
US4843735A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Shock absorbing type footwear
Assignee: Cubic Engineering KK
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Filing: 1987-06-12
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Granted: 1989-07-04
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Expires: 2007-06-12
Abstract
Abstract A shock absorbing type footwear having a buffer part which is provided at a specified position of a sole, said buffer part having a buffer layer made of a gelled material and at least one space formed adjacent to this buffer layer to absorb deformation of the buffer layer. Said buffer layer can be made to have either a continuous surface or at least two independent segments. Said buffer layer is provided below a flexible covering member which entirely covers the buffer layer and the space to absorb a shock which is caused upon each step of a foot and applied to the covering member.
Inventors
- 👤 Motoyasu Nakanishi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 15:00
CPC Classifications
A; A43; A43B; A43B13/00; A43B13/14; A43B13/18; A43B13/189; A43B13/187; A43C; A43C15/00; A43C15/02
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
185 words
A shock absorbing type footwear comprising a covering part which covers a human foot, a sole having, at its toe part, at least one buffer part comprising (a) a buffer layer made of a gelled material, (b) at least one space which is provided adjacent to the side of said buffer layer to absorb expansion and deformation of said buffer layer in a horizontal direction, (c) a peripheral wall for forming a space which surrounds said buffer layer and said space, (d) semi-hard plates arranged at both upper and lower sides of said buffer layer, (e) a covering member made of a flexible material to cover the surface of the upper one of said semi-hard plates, and (f) a hard plate which is superposed on the underside of the lower semi-hard plate of said semi-hard plates, and at least one pin which is fixed on the underside of the toe part of said sole so that it is positioned below the hard plate of said buffer part, wherein a shock conducted from said pin is dispersedly conducted to said buffer layer by said hard plate.
Claim 2
Dependent Claim
185 words
A shock absorbing type footwear comprising a covering part which covers a human foot, a sole having, at its toe part, at least one buffer part comprising (a) a buffer layer made of a gelled material, (b) at least one space which is provided adjacent to the side of said buffer layer to absorb expansion and deformation of said buffer layer in a horizontal direction, (c) a peripheral wall for forming a space which surrounds said buffer layer and said space, (d) semi-hard plates arranged at both upper and lower sides of said buffer layer, (e) a covering member made of a flexible material to cover the surface of the upper one of said semi-hard plates, and (f) a hard plate which is superposed on the underside of the lower semi-hard plate of said semi-hard plates, and at least one pin which is fixed on the underside of the toe part of said sole so that it is positioned below the hard plate of said buffer part, wherein a shock conducted from said pin is dispersedly conducted to said buffer layer by said hard plate.
Claim 3
Dependent Claim
28 words
A footwear in accordance with claim 1, wherein said buffer layer is made of a gelled material having a penetration value of 50 to 200 MMX10 -1 .
Claim 4
Dependent Claim
18 words
A footwear in accordance with claim 1, wherein the gelled material of said buffer layer is silicone gel.
Claim 5
Dependent Claim
17 words
A footwear in accordance with claim 1, wherein fine hollow particles are mixed in said gelled material.
Claim 6
Dependent Claim
24 words
A footwear in accordance with claim 4, wherein 1 to 4 weight % of organic fine hollow particles is mixed in said gelled material.
Claim 7
Dependent Claim
24 words
A footwear in accordance with claim 4, wherein 5 to 30 weight % of inorganic fine hollow particles is mixed in said gelled material.
Claim 8
Dependent Claim
19 words
A footwear in accordance with claim 1, wherein said buffer layer is covered by a flexible external covering layer.
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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) | 1992-07-03 | 1993-01-02 | 1993-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-07-03 | 1997-01-02 | 1997-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-07-03 | 2001-01-02 | 2001-07-04 | $7700.00 | Window Closed / Lapsed |