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Patent US4654986A successfully refreshed from Google Patents.
US4654986A
Expired / Lapsed
US
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Vacuum fitting ski boot
Assignee: FREDERICK W GEORGE LEGACY FAMILY PARTNERSHIP
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Filing: 1986-02-07
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Granted: 1987-04-07
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Expires: 2006-02-07
Abstract
Abstract A ski boot which creates a vacuum between the boot and user's foot, ankle and lower calf. The boot includes a rigid shell formed in sections which permit articulation, and padded liners are mounted within the shell. A flexible sheath secured to the shell forms an hermetical seal about the calf of the user. Means is provided for maintaining a partial vacuum within the boot. The partial vacuum causes both contraction of the boot shell and expansion of the foot to establish a close fit of the foot within the boot. The boot provides lateral stiffness while permitting forward flexing, and the close fit permits the user to achieve precise control during skiing.
Inventors
- 👤 Frederick W. George
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:47
CPC Classifications
A; A43; A43B; A43B5/00; A43B5/04; A43B5/0405
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
118 words
A ski boot for supporting the foot, ankle and lower calf of a user, comprising the combination of a rigid outer shell to fit about the ankle and foot and provide lateral support while permitting forward flexing of the ankle and foot, a sole below the shell for mounting on a ski or other platform, flexible sheath means cooperating with the shell for forming an hermetical seal about the foot, ankle and calf, and means for maintaining a partial vacuum between the sheath means and the foot, ankle and calf whereby the boot and sheath are caused to at least partially conform in close-fitting contact with the ankle and foot without creating objectionable pressure on the user's skin.
Claim 2
Dependent Claim
118 words
A ski boot for supporting the foot, ankle and lower calf of a user, comprising the combination of a rigid outer shell to fit about the ankle and foot and provide lateral support while permitting forward flexing of the ankle and foot, a sole below the shell for mounting on a ski or other platform, flexible sheath means cooperating with the shell for forming an hermetical seal about the foot, ankle and calf, and means for maintaining a partial vacuum between the sheath means and the foot, ankle and calf whereby the boot and sheath are caused to at least partially conform in close-fitting contact with the ankle and foot without creating objectionable pressure on the user's skin.
Claim 3
Dependent Claim
26 words
A ski boot as in claim 1 which includes a conformable liner between the inside of the shell and portions of the user's foot and ankle.
Claim 4
Dependent Claim
50 words
A ski boot as in claim 2 in which the flexible sheath means comprises a lower portion which is closely wrapped about the outer surface of the shell and an upper portion which fits about the user's calf and forms an hermetical seal therewith when said partial vacuum is maintained.
Claim 5
Dependent Claim
47 words
A ski boot as in claim 2 in which the flexible sheath means includes an annular cuff secured by a gas impervious seal about the upper portion of the shell with the cuff forming an hermetical seal about the user's calf when said partial vacuum is created.
Claim 6
Dependent Claim
77 words
A ski boot as in claim 1 in which the outer shell includes a lower rigid section mounted above the sole and enclosing a portion of the periphery of the foot, an upper rigid section having a forwardly open concave shape generally conforming with the back portion of the user's ankle and calf, and articulation means for joining the upper and lower sections of the shell to permit forward and reverse flexing of the foot and ankle.
Claim 7
Dependent Claim
32 words
A ski boot as in claim 5 which includes strap means for extending across the shin of the leg and releasably securing with opposite sides of the upper portion of the shell.
Claim 8
Dependent Claim
51 words
A ski boot as in claim 5 in which the sheath means includes a front portion extending across the front edges of the upper section of the shell to permit lateral expansion and contraction of the shell upper section to facilitate entry of the user's foot and ankle into the boot.
Claim 9
Dependent Claim
61 words
A ski boot as in claim 1 in which the shell includes a plurality of elongate rigid battens extending in parallel spaced-apart relationship above the instep of the foot, and the sheath means includes flexible diaphragm means extending between the battens to permit relative movement between the battens and thereby facilitate entry of the user's foot and ankle into the boot.
Claim 10
Dependent Claim
34 words
A ski boot as in claim 1 in which the means for maintaining the partial vacuum includes a one-way valve mounted on the boot for withdrawing air from within the boot and sheath means.
Claim 11
Dependent Claim
109 words
A ski boot as in claim 1 which includes at least one expandable bladder mounted between a portion of the boot within the sheath means and a portion of the user's foot or ankle about which a close fit is desired, the bladder being comprised of a plurality of gas-filled, closed cells having elastic cell walls whereby the volume of the cells increases due to expansion of the contained gas responsive to a decrease in pressure within the sheath means when said partial vacuum is created, with the expansion of the cells causing the bladder to expand and closely fit against said portion of the user's foot or ankle.
References Cited (Backward Citations)
DE1901606A1
Cited
DE2144826A1
Cited
US3758964A
Cited
FR2292442A1
Cited
FR2378467A1
Cited
FR2541095A1
Cited
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 |