US4100686A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Shoe sole construction
Assignee: ESTON GARY A
•
Filing: 1977-09-06
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Granted: 1978-07-18
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Expires: 1997-09-06
Abstract
Abstract A shoe sole construction is provided with a flexible bladder which is only partially filled with a non-compressible fluid. Preferably the fluid is water. The partially filled water bladder allows the water to flow from one portion of the bladder to other portions of the bladder during the walking cycle to provide proper support and maximum comfort and stability for the wearer of the shoe.
Inventors
- 👤 Thomas E. Sgarlato
- 👤 Gary A. Eston
- 👤 Thomas E. Freeman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 10:12
CPC Classifications
A; A43; A43B; A43B13/00; A43B13/14; A43B13/18; A43B13/20
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
62 words
A shoe construction comprising: (a) a sole means defining a recessed area; (b) a flexible bladder defining a fluid tight cavity, said bladder disposed within said recessed area; and (c) a volume of liquid disposed within and only partially filling said fluid tight bladder cavity whereby liquid may freely flow from one portion of said cavity to another portion of said cavity.
Claim 2
Dependent Claim
62 words
A shoe construction comprising: (a) a sole means defining a recessed area; (b) a flexible bladder defining a fluid tight cavity, said bladder disposed within said recessed area; and (c) a volume of liquid disposed within and only partially filling said fluid tight bladder cavity whereby liquid may freely flow from one portion of said cavity to another portion of said cavity.
Claim 3
Dependent Claim
43 words
A shoe construction as set forth in claim 1 wherein said sole means comprises a lower sole member having raised side walls defining said recessed area; and an upper insole member extending over said recessed area and fixedly secured to said side walls.
Claim 4
Dependent Claim
22 words
A shoe construction as set forth in claim 2 wherein said volume of water occupies less than 75% of said bladder cavity.
Claim 5
Dependent Claim
22 words
A shoe construction as set forth in claim 3 wherein said volume of liquid occupies less than 75% of said bladder cavity.
Claim 6
Dependent Claim
31 words
A shoe construction as set forth in claim 4 wherein said flexible liner is constructed of a closed cell neoprene material and said bladder is constructed of a thin vinyl material.
Claim 7
Dependent Claim
25 words
A shoe construction as set forth in claim 1 wherein said volume of liquid comprises water and occupies less than 75% of said bladder cavity.
Claim 8
Dependent Claim
22 words
A shoe construction as set forth in claim 2 wherein said volume of liquid occupies less than 75% of said bladder cavity.
Claim 9
Dependent Claim
25 words
A shoe construction as set forth in claim 1 wherein said volume of liquid comprises water and occupies 20% to 60% of said bladder cavity.
References Cited (Backward Citations)
US580501A
Cited
US2084517A
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FR58865E
Cited
US2677906A
Cited
US3160963A
Cited
US3253355A
Cited
US3765422A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-07-17 | 1982-01-16 | 1982-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-07-17 | 1986-01-16 | 1986-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-07-17 | 1990-01-16 | 1990-07-18 | $7700.00 | Window Closed / Lapsed |