US5343639A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Shoe with an improved midsole
Assignee: Nike Inc
•
Filing: 1993-10-18
•
Granted: 1994-09-06
•
Expires: 2013-10-18
Abstract
Abstract The invention is directed to a midsole for a shoe including one or more foam columns disposed between an upper and a lower plate. One or more elastomeric foam elements are disposed between the upper and lower plates. The foam elements are made of a material such as microcellular polyurethane-elastomer based on a polyester-alcohol and naphthalene-disocyanate (NDI). In one embodiment, the foam elements have the shape of hollow cylindrical columns, and may include grooves formed on the exterior surface. One or more elastic rings are disposed about the columns and are removably disposable in the grooves, allowing the stiffness of the columns to be adjusted. In a further embodiment, inflatable gas bladders are disposed in the hollow regions. The heights of the gas bladders may be less than the heights of the columns such that when the midsole is compressed, the wearer experiences a first stiffness corresponding to compression of the columns alone, and a second stiffness corresponding to compression of both the columns and the bladders. Alternatively, the bladders may be inflated so as to cause the columns to be stretched, even when no load is applied. Since the level of inflation of the bladders may be adjusted, the overall stiffness of the midsole may be tuned to the individual requirements of the wearer.
Inventors
- 👤 Bruce J. Kilgore
- 👤 Thomas McMahon
- 👤 John C. Tawney
- 👤 Gordon Valiant
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 15:20
CPC Classifications
A; A43; A43B; A43B13/00; A43B13/14; A43B13/18; A43B13/20; A43B13/206; A43B13/181; A43B13/183; A43B13/189
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
150 words
A shoe having an upper and a sole connected to the upper, said sole including a substantially open space and means for cushioning disposed within said open space, said cushioning means comprising at least one two-stage cushioning element having a first compressible element having a first uncompressed height and a second compressible element having a second uncompressed height which is less than said first uncompressed height, one of said compressible elements comprising a resilient support element and the other of said compressible elements comprising a fluid-filled bladder, one of said compressible elements disposed within the other of said compressible elements, said first compressible element compressible to a height which is less than said second uncompressed height, said first compressible element compressible jointly with said second compressible element when said first compressible element is compressed below said second uncompressed height, wherein, said open space is maintained substantially about said cushioning means.
Claim 2
Dependent Claim
150 words
A shoe having an upper and a sole connected to the upper, said sole including a substantially open space and means for cushioning disposed within said open space, said cushioning means comprising at least one two-stage cushioning element having a first compressible element having a first uncompressed height and a second compressible element having a second uncompressed height which is less than said first uncompressed height, one of said compressible elements comprising a resilient support element and the other of said compressible elements comprising a fluid-filled bladder, one of said compressible elements disposed within the other of said compressible elements, said first compressible element compressible to a height which is less than said second uncompressed height, said first compressible element compressible jointly with said second compressible element when said first compressible element is compressed below said second uncompressed height, wherein, said open space is maintained substantially about said cushioning means.
Claim 3
Dependent Claim
17 words
The shoe recited in claim 1, said sole further comprising a shell having upper and lower plates.
Claim 4
Dependent Claim
24 words
The shoe recited in claim 1, said fluid-filled bladder having a height which is approximately 60% of the height of said resilient support element.
Claim 5
Dependent Claim
16 words
The shoe recited in claim 1, said cushioning means comprising a plurality of two-stage cushioning elements.
Claim 6
Dependent Claim
32 words
The shoe recited in claim 1, said cushioning means comprising four said two-stage cushioning elements, two of said two-stage cushioning elements disposed on each side of the sagittal plane of the shoe.
Claim 7
Dependent Claim
26 words
The shoe recited in claim 1, said fluid-filled bladder comprising a gas-filled bladder, said shoe further comprising means for adjusting the gaseous pressure within said bladder.
Claim 8
Dependent Claim
30 words
The shoe recited in claim 1, said first compressible element comprising a hollow foam support element, said second element comprising a fluid-filled bladder disposed within said hollow foam support element.
Claim 9
Dependent Claim
49 words
The shoe recited in claim 7, said foam support element comprising a microcellular polyurethane-elastomer selected from the group consisting a microcellar polyurethane-elastomer based on a polyester-alcohol and naphthalene-1,5-diisocyanate (NDI), a microcellular polyurethane-elastomer based on a polyester-alcohol and methylenediphenylene-4,4'-diisocyanate (MDI), and a microcellular polyurethane-elastomer based on a polyester-alcohol and bitolyene(TODI).
Claim 10
Dependent Claim
140 words
A shoe having an upper and a sole connected to the upper, said sole including a midsole, said midsole comprising two substantially hollow support elements having an outer surface, said elements comprising a resilient material and discrete from each other, an insert disposed within each of said elements and having a height which is less than the height of said element, said inserts comprising a fluid-filled bladder, at least one of said support elements having at least one annular groove disposed in the outer surface, and at least one elastic ring element disposed about said at least one support element and movable in the vertical direction so as to be removably disposable in said at least one groove, the stiffness of said at least one support element adjustable by selectively positioning said ring element into or out of said groove.
Claim 11
Dependent Claim
140 words
A shoe having an upper and a sole connected to the upper, said sole including a midsole, said midsole comprising two substantially hollow support elements having an outer surface, said elements comprising a resilient material and discrete from each other, an insert disposed within each of said elements and having a height which is less than the height of said element, said inserts comprising a fluid-filled bladder, at least one of said support elements having at least one annular groove disposed in the outer surface, and at least one elastic ring element disposed about said at least one support element and movable in the vertical direction so as to be removably disposable in said at least one groove, the stiffness of said at least one support element adjustable by selectively positioning said ring element into or out of said groove.
Claim 12
Dependent Claim
15 words
The shoe recited in claim 1, said resilient support element having an overall cylindrical shape.
Claim 13
Dependent Claim
14 words
The shoe recited in claim 1, said resilient support element having an overall barrel-shape.
Claim 14
Dependent Claim
19 words
The shoe recited in claim 1, said resilient support element having upper and lower planar surfaces and a partition.
Claim 15
Dependent Claim
37 words
The shoe recited in claim 12, wherein, a cavity having a circular shaped cross-section extends inwardly from each planar surface and terminates at the partition, the radius of each cross-section decreasing in a direction towards the partition.
Claim 16
Dependent Claim
21 words
The shoe recited in claim 13 further comprising a plurality of webs disposed in said cavities and extending from the partition.
Claim 17
Dependent Claim
19 words
The shoe recited in claim 14, said webs formed integrally with said column-shaped element and having an x-shaped cross-section.
Claim 18
Dependent Claim
22 words
The shoe recited in claim 12, said resilient support element comprising a hollow foam support element having an overall barrel-shaped exterior surface.
Claim 19
Dependent Claim
21 words
The shoe recited in claim 12, said resilient support element comprising a hollow foam support element having an overall cylindrical shape.
References Cited (Backward Citations)
US507490A
Cited
US622673A
Cited
GB190321594A
Cited
GB190607163A
Cited
US933422A
Cited
US949754A
Cited
US1094211A
Cited
FR465267A
Cited
US1102343A
Cited
US1278320A
Cited
US1272490A
Cited
US1328816A
Cited
US1338817A
Cited
US1502087A
Cited
US1670747A
Cited
US1870065A
Cited
US2104924A
Cited
US2122108A
Cited
US2299009A
Cited
DE806647C
Cited
US2721400A
Cited
US2710460A
Cited
FR1227420A
Cited
US3041746A
Cited
US3429545A
Cited
US3822490A
Cited
US4074446A
Cited
US4030213A
Cited
US4314413A
Cited
US4262433A
Cited
US4271607A
Cited
US4237625A
Cited
US4223457A
Cited
US4241523A
Cited
GB2032761A
Cited
US4267648A
Cited
US4319412A
Cited
US4342158A
Cited
US4399621A
Cited
US4680876A
Cited
US4439936A
Cited
US4494321A
Cited
GB2173987A
Cited
US4546555A
Cited
US4492046A
Cited
US4610099A
Cited
US4616431A
Cited
US4536974A
Cited
FR2556118A1
Cited
DE3400997A1
Cited
US4598487A
Cited
US4559366A
Cited
US4566206A
Cited
US4680875A
Cited
US4592153A
Cited
US4598484A
Cited
US4594799A
Cited
US4670995A
Cited
US4731939A
Cited
US4709489A
Cited
US4715130A
Cited
US4660299A
Cited
US4638575A
Cited
US4746555A
Cited
US4763426A
Cited
US4794707A
Cited
US4815221A
Cited
US4843741A
Cited
US4845863A
Cited
US4798009A
Cited
US4753021A
Cited
US4887367A
Cited
SU1526637A1
Cited
US4843737A
Cited
US4878300A
Cited
US4918838A
Cited
US4881329A
Cited
JPH02146188A
Cited
US5138776A
Cited
US4956927A
Cited
US4936029A
Cited
US4910884A
Cited
US4914836A
Cited
US4984376A
Cited
US5014449A
Cited
US5068981A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-09-05 | 1998-03-07 | 1998-09-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-09-05 | 2002-03-07 | 2002-09-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-09-05 | 2006-03-07 | 2006-09-06 | $7700.00 | Window Closed / Lapsed |