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US4941271A
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US
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Boot with frictional heat generator and forced air circulation
Assignee: Individual
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Filing: 1988-08-11
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Granted: 1990-07-17
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Expires: 2008-08-11
Abstract
Abstract There is disclosed a frictional heat generator and a forced air circulation system for shoes and, in particular, for boots such as ski boots. The shoe has an inner sole which is formed of a pair of sole plates which are mounted for relative sliding movement in the shoe. The upper sole plate is pivotally attached at its toe end to an outer sole of the shoe. The lower sole plate of this pair is pivotally mounted with a crank arm which is located at its heel end. Twisted torsion cables are provided to bias the sole plates upwardly against the applied weight of the wearer. A compartment is formed in the shoe between the pair of sole plates and outer sole and is enclosed with a diaphragm to function as a bellows-type air pump to circulate air through the shoe. Preferably, the forced air circulation system is used in which an air bag which overlies the arch of the shoe and with an air pressure hand pump whereby the air pressure within the shoe can be adjustably set to provide the desired degree of tension on the fasteners of the boot.
Inventors
- 👤 Nikola Lakic
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 01:28
CPC Classifications
A; A43; A43B; A43B13/00; A43B13/14; A43B13/18; A43B13/20; A43B13/206; A41; A41D; A41D19/00; A41D19/015; A41D19/01529; A41D19/01535; A42; A42B; A42B3/00; A42B3/04; A42B3/10; A42B3/12; A42B3/121; A43B13/203; A43B17/00; A43B17/02; A43B17/03; A43B17/035; A43B3/00; A43B3/34; A43B5/00; A43B5/04; A43B5/0405; A43B5/0407; A43B7/00; A43B7/06; A43B7/08; A43B7/081; A43B7/082
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
149 words
A boot having an internal, sealed air system with forced air circulation which comprises: a. a sole formed of an outer sole and an inner sole pivotally attached together at the toe of the boot for hinged movement in response to the movements of a wearer's foot; b. a first compartment between said outer and inner soles; c. a flexible diaphragm extending between said inner and outer soles, enclosing and sealing said first compartment; d. at least a second compartment located within said boot and above the inner sole thereof; e. an air passageway means open to said first and second compartments and extending therebetween to permit free air flow between said compartments; and f. a frictional heat generator mounted in said first compartment for movement in response to said hinged movement of said inner and outer soles, thereby providing a frictional heat generator located within said first compartment.
Claim 2
Dependent Claim
149 words
A boot having an internal, sealed air system with forced air circulation which comprises: a. a sole formed of an outer sole and an inner sole pivotally attached together at the toe of the boot for hinged movement in response to the movements of a wearer's foot; b. a first compartment between said outer and inner soles; c. a flexible diaphragm extending between said inner and outer soles, enclosing and sealing said first compartment; d. at least a second compartment located within said boot and above the inner sole thereof; e. an air passageway means open to said first and second compartments and extending therebetween to permit free air flow between said compartments; and f. a frictional heat generator mounted in said first compartment for movement in response to said hinged movement of said inner and outer soles, thereby providing a frictional heat generator located within said first compartment.
Claim 3
Dependent Claim
20 words
The boot of claim 1 including an outer shell receiving an inner shoe which includes said outer and inner soles.
Claim 4
Dependent Claim
48 words
The boot of claim 1 wherein said shoe has an inside lining continuous with its upper portions which is formed of a layer having internal and interconnecting tubular cavities, with said air passageway means defined by a tubular connector communicating between said first compartment and said tubular cavities.
Claim 5
Dependent Claim
37 words
The boot of claim 1 wherein said inner sole is covered with a lining formed of a layer having internal and interconnecting tubular cavities and including air passages open between said first compartment and said tubular cavities.
Claim 6
Dependent Claim
42 words
The boot of claim 2 wherein said inner shoe has a sole which is formed with a central plate having an open recess at its heel and instep region and a continuous bottom plate which is sealingly secured on the bottom thereof.
Claim 7
Dependent Claim
35 words
The boot of claim 5 wherein said bottom plate is removably secured to said central plate and including a resilient seal member captured between said central and bottom plates, entirely surrounding and sealing said recess.
Claim 8
Dependent Claim
30 words
The boot of claim 2 wherein said second compartment is an air bag which is positioned above the instep of the wearer's foot and between the inner shoe and shell.
Claim 9
Dependent Claim
49 words
The boot of claim 1 including an air pump with an inlet port open to receive fresh air and a discharge port open to fluid passageway means communicating with said compartment and air bag, whereby the pressure of air within said compartment and air bag can be adjustably controlled.
Claim 10
Dependent Claim
40 words
The boot of claim 8 wherein said air pump comprises a chamber having at least one collapsible wall with button means engaging said collapsible wall, and with check valve means in said inlet and discharge ports to induce air circulation.
Claim 11
Dependent Claim
35 words
The boot of claim 1 including resilient means positioned within said first compartment and biased against the underside of said inner sole to urge said inner sole upwardly, against the applied weight of the wearer.
Claim 12
Dependent Claim
41 words
The boot of claim 10 wherein said resilient means comprises a torsion cable formed of a plurality of twisted resilient wires preloaded with a predetermined degree of torsion and looped between the underside of said inner sole and said bottom plate.
Claim 13
Dependent Claim
23 words
The boot of claim 11 including a plurality of loops of said torsion cable positioned between said inner sole and said bottom plate.
Claim 14
Dependent Claim
28 words
The boot of claim 11 including spring adjustment means to apply rotational torsional stress to said torsion cable, thereby providing a controllable degree of resiliency to said cable.
Claim 15
Dependent Claim
60 words
The boot of claim 12 wherein said loops of said torsion cable are secured to a support frame mounted on said bottom plate and including a drive gear permanently secured to each loop of said cable, with means to rotate each of said drive gears and thereby provide a predetermined degree of torsional loading on said loops of torsion cable.
Claim 16
Dependent Claim
25 words
The boot of claim 14 wherein said means to rotate each of said drive gears comprises a worm gear rotatably mounted on said support frame.
Claim 17
Dependent Claim
12 words
The boot of claim 12 wherein said plurality of loops are discontinuous.
Claim 18
Dependent Claim
35 words
The boot of claim 1 including a tubular air passageway supported on the upper of said boot and communicating with a tubular connector for the removable attachment of a tubing connector externally of said boot.
Claim 19
Dependent Claim
44 words
The combination of the boot of claim 17 and wearing apparel having at least a lining which includes at least one tubular passageway with a terminal connector thereof in engagement with said tubular connector communicating with the sealed internal air system of said boot.
Claim 20
Dependent Claim
25 words
The combination of claim 18 wherein said wearing apparel includes a suit having legs and arms to receive the legs and arms of a wearer.
Claim 21
Dependent Claim
26 words
The combination of claim 18 wherein said wearing apparel includes hand coverings with linings having tubular sealed passageways with connector means to communicate with said connector.
Claim 22
Dependent Claim
18 words
The boot of claim 10 including brake means engageable to lock said inner sole in a depressed position.
Claim 23
Dependent Claim
39 words
The boot of claim 21 wherein said brake means is located in a brake chamber in the heel of said boot and includes a remote release cable extending from said brake chamber to the top portion of said boot.
Claim 24
Dependent Claim
30 words
The boot of claim 22 wherein said boot has a vertical tab at its heel end and said remote release cable extends to the upper end of said vertical tab.
Claim 25
Dependent Claim
30 words
The boot of claim 1 wherein said inner sole has an upper and a lower sole plate which are in mutual sliding frictional contact, thereby providing said frictional heat generator.
Claim 26
Dependent Claim
19 words
The boot of claim 11 wherein said torsion cable resilient means flexes and also generates frictional heat during flexing.
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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) | 1993-07-16 | 1994-01-15 | 1994-07-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-07-16 | 1998-01-15 | 1998-07-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-07-16 | 2002-01-15 | 2002-07-17 | $7700.00 | Window Closed / Lapsed |