US3786580A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Inner boot and method for forming the same
Assignee: KIPP AND CHRISTIAN
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Filing: 1970-12-01
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Granted: 1974-01-22
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Expires: 1990-12-01
Abstract
Abstract An inner boot for use within an outer shell which includes a flexible inner liner sized to receive the foot of an individual, an outer liner positioned about the inner liner to form a substantially closed compartment between the liners and attached to the inner liner with connecting means for maintaining filling material within the compartment and for passing gas out of said compartment when said filling material is injected thereinto. A filling tube can be provided in communication with the compartment for injecting a resin elastomer reaction mixture into said compartment.
Inventors
- 👤 M Dalebout
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:38
CPC Classifications
A; A43; A43B; A43B5/00; A43B5/04; A43B5/0405
Claims Analysis
Total Claims: 31
Claim 1
Independent Claim
114 words
In combination with an outer shell, an inner boot adapted to be custom fit to the foot of an individual positioned within said outer shell, said inner boot comprising a flexible inner liner sized to receive the foot of said individual; an outer liner positioned about said inner liner to form a substantially closed compaRtment between said inner liner and said outer liner, the outer and inner liners being attached together with connecting means for substantially maintaining filling material within said compartment and for exhausting gases out of said compartment when said filling material is passed into said compartment; and filling means in communication with said compartment for injecting filling material into said compartment.
Claim 2
Dependent Claim
114 words
In combination with an outer shell, an inner boot adapted to be custom fit to the foot of an individual positioned within said outer shell, said inner boot comprising a flexible inner liner sized to receive the foot of said individual; an outer liner positioned about said inner liner to form a substantially closed compaRtment between said inner liner and said outer liner, the outer and inner liners being attached together with connecting means for substantially maintaining filling material within said compartment and for exhausting gases out of said compartment when said filling material is passed into said compartment; and filling means in communication with said compartment for injecting filling material into said compartment.
Claim 3
Dependent Claim
12 words
The combination of claim 1 wherein said connecting means comprises spaced stitches.
Claim 4
Dependent Claim
21 words
The combination of claim 2 wherein said inner boot is sized to enclose the foot and lower ankle of said individual.
Claim 5
Dependent Claim
13 words
The combination of claim 2 wherein said filling means comprises an elongated tube.
Claim 6
Dependent Claim
36 words
The combination of claim 4 wherein said elongated tube is secured to the ankle cuff portion of said outer liner at a position above the top edge of the ankle cuff of the outer boot shell.
Claim 7
Dependent Claim
27 words
The boot of claim 3 wherein said inner liner and said outer liner of said inner boot surrounds the entire foot and lower ankle of said individual.
Claim 8
Dependent Claim
18 words
The boot of claim 1 wherein said outer liner is formed from a thin walled stretchable sheet material.
Claim 9
Dependent Claim
15 words
The boot of claim 7 wherein said thin walled stretchable sheet material is latex rubber.
Claim 10
Dependent Claim
22 words
The boot of claim 7 wherein said outer liner is formed as a unitary structure in the proximate shape of a boot.
Claim 11
Dependent Claim
38 words
The combination of claim 9 wherein said inner liner of said inner boot comprises a closed cell foam sheet having a two-way stretch fabric bonded to the face of said sheet positioned adjacent said foot of said individual.
Claim 12
Dependent Claim
108 words
An inner boot for use within an outer shell and adapted to be custom fit to the foot of an individual which comprises a flexible inner liner sized to receive said foot of said individual; an outer liner positioned about said inner liner to form a substantially closed compartment between said inner liner and said outer liner, the outer and inner liners being attached together with connecting means for substantially maintaining filling material within said compartment and for exhausting gases out of said compartment when said filling material is passed into said compartment; and filling means in communication with said compartment for injecting filling material into said compartment.
Claim 13
Dependent Claim
108 words
An inner boot for use within an outer shell and adapted to be custom fit to the foot of an individual which comprises a flexible inner liner sized to receive said foot of said individual; an outer liner positioned about said inner liner to form a substantially closed compartment between said inner liner and said outer liner, the outer and inner liners being attached together with connecting means for substantially maintaining filling material within said compartment and for exhausting gases out of said compartment when said filling material is passed into said compartment; and filling means in communication with said compartment for injecting filling material into said compartment.
Claim 14
Dependent Claim
13 words
The inner boot of claim 11 wherein said connecting means comprises spaced stitches.
Claim 15
Dependent Claim
22 words
The inner boot of claim 12 wherein said inner boot is sized to enclose the foot and lower ankle of said individual.
Claim 16
Dependent Claim
14 words
The inner boot of claim 12 wherein said filling means comprises an elongated tube.
Claim 17
Dependent Claim
39 words
The inner boot of claim 12 wherein said inner liner of said inner boot comprises a closed cell foam sheet having a two-way stretch fabric bonded to the face of said sheet positioned adjacent said foot of said individual.
Claim 18
Dependent Claim
19 words
The inner boot of claim 12 wherein said outer liner is formed from a thin walled stretchable sheet material.
Claim 19
Dependent Claim
13 words
The inner boot of claim 16 wherein said sheet material is latex rubber.
Claim 20
Dependent Claim
24 words
The inner boot of claim 13 wherein said outer liner of said inner boot surrounds the entire foot and lower ankle of said individual.
Claim 21
Dependent Claim
26 words
The inner boot of claim 12 wherein a relatively soft pad is secured to said inner liner to cover the instep portion of the individual''s foot.
Claim 22
Independent Claim
159 words
A method for custom fitting an article of footwear to the foot of an individual which comprises providing an outer shell with an inner boot within said outer shell, said inner boot including an inner liner sized to receive the foot of said individual and an outer liner positioned about said inner liner to form a substantially closed compartment between said inner liner and said outer liner, the outer and inner liners being attached with connecting means for substantially maintaining filling material in said compartment and for exhausting gases out of said compartment; injecting a filling material into said compartment when a form the shape of an individual''s foot is positioned within said inner liner to exhaust gases out of said compartment through said connecting means and to urge said inner liner substantially adjacent to and about said form of said individual''s foot and to urge said outer liner substantially against the interior sidewalls of said outer boot shell.
Claim 23
Independent Claim
159 words
A method for custom fitting an article of footwear to the foot of an individual which comprises providing an outer shell with an inner boot within said outer shell, said inner boot including an inner liner sized to receive the foot of said individual and an outer liner positioned about said inner liner to form a substantially closed compartment between said inner liner and said outer liner, the outer and inner liners being attached with connecting means for substantially maintaining filling material in said compartment and for exhausting gases out of said compartment; injecting a filling material into said compartment when a form the shape of an individual''s foot is positioned within said inner liner to exhaust gases out of said compartment through said connecting means and to urge said inner liner substantially adjacent to and about said form of said individual''s foot and to urge said outer liner substantially against the interior sidewalls of said outer boot shell.
Claim 24
Dependent Claim
37 words
The method of claim 20 wherein said filling material is a liquid resin reaction mixture and said reaction mixture is cured in said compartment while said form of said individual''s foot is positioned within said inner liner.
Claim 25
Dependent Claim
18 words
The method of claim 20 wherein the form the shape of said individual''s foot is said individual''s foot.
Claim 26
Dependent Claim
21 words
The method of claim 21 wherein said resin reaction mixture is aerated prior to injecting said reaction mixture into said compartment.
Claim 27
Dependent Claim
16 words
The method of claim 21 wherein said resin reaction mixture is a polyurethane resin reaction mixture.
Claim 28
Dependent Claim
47 words
The method of claim 22 wherein a toe covering is positioned over the toes of said individual''s foot when said foot is positioned within said inner liner of said inner boot to provide an enlarged area for the toes of said individual''s foot in said inner boot.
Claim 29
Dependent Claim
36 words
The method of claim 24 wherein said polyurethane resin reaction mixture is prepared prior to injecting said mixture into said compartment by mixing together separately packaged quantities of a polyisocyanate, a polyol and a curing catalyst.
Claim 30
Independent Claim
277 words
A method of custom fitting a boot to a mandrel corresponding to the foot of a wearer or to the foot of the wearer comprising, providing an outer boot shell made of a substantially rigid material with an injection opening and vent opening, providing a flexible, double-wall liner for the boot shell, the inner wall of which approximates the surface of the mandrel or foot of the wearer and the outer wall of which has injection and vent openings therein adapted to register with the injection and vent openings in the boot shell, inserting a mandrel or foot of the wearer in the liner, inserting the liner into the boot with the injection opening on the liner registering with the injection opening of the boot and the opening on the liner registering with the vent opening of the boot, closing the boot about the liner, injecting through the injection opening of the liner an uncured foaming resinous material mixed immediately prior to injection with a catalyst, the components of the resinous material reacting to produce an elastomeric foam which expands to fill the space between the inner and outer walls of the liner and which causes the outer wall of the liner to conform substantially to the inner surface of the shell of the boot and the inner wall of the liner to conform substantially to the mandrel or foot of the wearer, the forming gas generated in the liner by mixing of the catalyst and resin venting to the atmosphere through the vent opening, and allowing the foam resin adequately to cure in the liner prior to removal of the mandrel or foot of the wearer.
Claim 31
Independent Claim
277 words
A method of custom fitting a boot to a mandrel corresponding to the foot of a wearer or to the foot of the wearer comprising, providing an outer boot shell made of a substantially rigid material with an injection opening and vent opening, providing a flexible, double-wall liner for the boot shell, the inner wall of which approximates the surface of the mandrel or foot of the wearer and the outer wall of which has injection and vent openings therein adapted to register with the injection and vent openings in the boot shell, inserting a mandrel or foot of the wearer in the liner, inserting the liner into the boot with the injection opening on the liner registering with the injection opening of the boot and the opening on the liner registering with the vent opening of the boot, closing the boot about the liner, injecting through the injection opening of the liner an uncured foaming resinous material mixed immediately prior to injection with a catalyst, the components of the resinous material reacting to produce an elastomeric foam which expands to fill the space between the inner and outer walls of the liner and which causes the outer wall of the liner to conform substantially to the inner surface of the shell of the boot and the inner wall of the liner to conform substantially to the mandrel or foot of the wearer, the forming gas generated in the liner by mixing of the catalyst and resin venting to the atmosphere through the vent opening, and allowing the foam resin adequately to cure in the liner prior to removal of the mandrel or foot of the wearer.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-01-21 | 1977-07-23 | 1978-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-21 | 1981-07-23 | 1982-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-21 | 1985-07-23 | 1986-01-22 | $7700.00 | Window Closed / Lapsed |