Patent US5741568A successfully refreshed from Google Patents.
US5741568A
Expired / Lapsed
US
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Shock absorbing cushion
Assignee: Individual
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Filing: 1995-08-18
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Granted: 1998-04-21
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Expires: 2015-08-18
Abstract
Abstract A shock absorbing cushioning device suitable for products, objects and footwear which is comprised of a compressible insert encapsulated within an elastomeric barrier member. The elastomeric barrier member is secured to the compressible insert by a plurality of tensile members having a first portion embedded in the elastomeric material and a second portion embedded in the compressible insert. The elastomeric member is also filled with a fluid, preferably a compressible gas.
Inventors
- 👤 Marion Franklin Rudy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 05:05
CPC Classifications
A; A43; A43B; A43B7/00; A43B7/14; A43B7/1405; A43B7/141; A43B13/00; A43B13/02; A43B13/04; A43B13/14; A43B13/18; A43B13/187; A43B13/189; A43B17/00; A43B17/02; A43B17/026; A43B17/03; A43B17/035; A43B7/1415; A43B7/142; A43B7/144; A43B7/1445; F; F16; F16F; F16F13/00; F16F13/002; Y; Y10; Y10T; Y10T428/00; Y10T428/13; Y10T428/1352; Y10T428/23; Y10T428/231; Y10T428/233; Y10T428/237; Y10T428/239; Y10T428/249921; Y10T428/249953; Y10T428/24996; Y10T428/249987; Y10T428/249988; Y10T442/00; Y10T442/30; Y10T442/3472; Y10T442/3504; Y10T442/3512
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
74 words
A cushion for an article of footwear comprised of a flexible foam core shaped to protect at least a portion of a footsole, said foam core surrounded by an envelope comprised of a material which is impervious to at least a selected fluid, a plurality of filaments having a first portion secured to said fluid impervious material and a second portion secured to said foam core, said selected fluid being contained within said envelope.
Claim 2
Dependent Claim
74 words
A cushion for an article of footwear comprised of a flexible foam core shaped to protect at least a portion of a footsole, said foam core surrounded by an envelope comprised of a material which is impervious to at least a selected fluid, a plurality of filaments having a first portion secured to said fluid impervious material and a second portion secured to said foam core, said selected fluid being contained within said envelope.
Claim 3
Dependent Claim
17 words
The cushion of claim 1, wherein said foam core is shaped to conform to a human foot.
Claim 4
Dependent Claim
14 words
The cushion of claim 1 wherein said foam core is an open cell foam.
Claim 5
Dependent Claim
15 words
The cushion of claim 1 wherein said foam core is a partially open cell foam.
Claim 6
Dependent Claim
13 words
The cushion of claim 1 wherein said foam core is comprised of urethane.
Claim 7
Dependent Claim
10 words
The cushion of claim 1 wherein said fluid is compressible.
Claim 8
Dependent Claim
20 words
The cushion of claim 6 wherein said envelope has a gage pressure of at least 0 pounds per square inch.
Claim 9
Dependent Claim
10 words
The cushion of claim 1 wherein said fluid is incompressible.
Claim 10
Dependent Claim
38 words
The cushion of claim 6 wherein said fluid is selected from the group consisting of air; nitrogen; hexafluoroethane; sulfur hexafluoride; perfluoropropane; perfluorobutane; perfluoropentane; perfluorohexane; perfluoroheptane; octafluorocylcobutane; perfluorocyclobutane; hexafluoropropylene; tetrafluoromethane; monochloropentafluoroethane; 1,2-dichlorotetra-fluoroethane; 1,1,2-trichloro-1,2,2-trifluoroethane; chlorotrifluoroethylene; bromotrifluoromethane; monochlorotrifluoromethane; and mixtures thereof.
Claim 11
Dependent Claim
36 words
The cushion of claim 8 wherein the fluid is selected from the group consisting of water, semi-gel liquids, oil, grease, soft wax, liquid wax, glycerine, soaps, silicone, corn syrup, rheopexic liquids, thixotropic liquids and mixtures thereof.
Claim 12
Dependent Claim
12 words
The cushion of claim 1 wherein said envelope is comprised of urethane.
Claim 13
Dependent Claim
22 words
The cushion of claim 1, wherein said plurality of filaments has an area density of at least 1000 filaments per square inch.
Claim 14
Dependent Claim
42 words
The cushion of claim 1 wherein said filaments are comprised of a material selected from the group consisting of polyester, polyamide, nylon, fiberglass, carbon, silk, cotton, wool, urethane, aramide, dacron, cellulose, rayon, copra, acetate, polyvinyl alcohol, polyacrylic, polyethylene terephthalate, or mixtures thereof.
Claim 15
Dependent Claim
17 words
The cushion of claim 1 wherein said filaments have a denier of between about 1 and 20.
Claim 16
Dependent Claim
25 words
The cushion of claim 1 having a separation strength of said foam core from said envelope of about 5 to 40 pounds per linear inch.
Claim 17
Dependent Claim
13 words
The member of claim 1 wherein said filaments are components of a fabric.
Claim 18
Dependent Claim
64 words
An article of footwear comprising an envelope to house a foot and a sole portion comprised of an elastomeric material that is substantially impervious to a selected non-polar gas, and is permeable to air in the shape of a cushion, said cushion containing a compressible insert and said selected non-polar gas, and a plurality of filaments connecting said elastomeric material and said compressible insert.
Claim 19
Dependent Claim
64 words
An article of footwear comprising an envelope to house a foot and a sole portion comprised of an elastomeric material that is substantially impervious to a selected non-polar gas, and is permeable to air in the shape of a cushion, said cushion containing a compressible insert and said selected non-polar gas, and a plurality of filaments connecting said elastomeric material and said compressible insert.
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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) | 2001-04-20 | 2001-10-20 | 2002-04-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-04-20 | 2005-10-20 | 2006-04-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-04-20 | 2009-10-20 | 2010-04-21 | $7700.00 | Window Closed / Lapsed |