US3975840A
Expired / Lapsed
US
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Molded athletic boot and method of making same
Assignee: Warrington Inc
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Filing: 1975-01-24
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Granted: 1976-08-24
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Expires: 1995-01-24
Abstract
Abstract A molded athletic boot, a reinforcing insert assembly for a molded athletic boot and a method of making the boot are described. A cloth-like insert is mounted on a last and a mold is then closed about the last. A castable material, such as polyurethane is injected into the mold so that it impregnates and encapsulates the insert prior to solidifying to form an athletic boot having great tensile strength and rigidity. The described insert assembly comprises a porous, elastic, sock-like element which fits over the last. A layer of a woven or knitted polyamide and a layer of a nonwoven polyamide are secured inside the sock-like element at selected locations.
Inventors
- 👤 Maurice J. Juzenko
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 07:43
CPC Classifications
B; B29; B29D; B29D35/00; B29D35/06; B29D35/061; B29D35/064; A; A43; A43B; A43B1/00; A43B1/02; A43B1/028; A43B1/14
Claims Analysis
Total Claims: 28
Claim 1
Independent Claim
43 words
An athletic boot comprising a molded outer shell shaped to encase a human foot, and a porous, cloth-like insert impregnated and encapsulated by the material of said outer shell and interlocked therewith, said insert having a higher elastic modulus than said outer shell.
Claim 2
Dependent Claim
43 words
An athletic boot comprising a molded outer shell shaped to encase a human foot, and a porous, cloth-like insert impregnated and encapsulated by the material of said outer shell and interlocked therewith, said insert having a higher elastic modulus than said outer shell.
Claim 3
Dependent Claim
41 words
An athletic boot according to claim 1, wherein said porous insert comprises at least two layers of cloth-like material, each layer having a different filament arrangement and wherein both of said layers are impregnated by the material of said outer shell.
Claim 4
Dependent Claim
15 words
An athletic boot according to claim 1, wherein said outer shell is a polyurethane rubber.
Claim 5
Dependent Claim
14 words
An athletic boot according to claim 2, wherein one of said layers is woven.
Claim 6
Dependent Claim
15 words
An athletic boot according to claim 4, wherein the other of said layers is nonwoven.
Claim 7
Dependent Claim
40 words
An athletic boot according to claim 5, wherein said nonwoven layer has a thickness such that it occupies between 40 percent and 60 percent of the bulk volume of the outer shell in the region thereof containing the nonwoven layer.
Claim 8
Dependent Claim
24 words
An athletic boot according to claim 2, wherein one of said layers is a woven polyamide and wherein another layer is a nonwoven polyamide.
Claim 9
Dependent Claim
19 words
An athletic boot according to claim 5, wherein said woven layer extends along the sole of the outer shell.
Claim 10
Dependent Claim
18 words
An athletic boot according to claim 5, wherein said nonwoven layer overlies the toe of said outer shell.
Claim 11
Dependent Claim
28 words
An athletic boot according to claim 2, wherein said porous insert includes an outer elastic layer for holding the other layers in position with respect to a mold.
Claim 12
Dependent Claim
15 words
An athletic boot according to claim 10, wherein said outer layer is a polyurethane-nylon material.
Claim 13
Dependent Claim
15 words
An athletic boot according to claim 10, wherein said layers are held together by tack-stitching.
Claim 14
Dependent Claim
61 words
An insert assembly for use in the manufacture of an athletic boot, said insert assembly comprising an outer sock-shaped insert element of flexible, elastic and highly porous material capable of being fitted loosely but securely over a last, said insert assembly further comprising a reinforcing insert element of at least one layer of cloth-like material fastened to said outer insert element.
Claim 15
Dependent Claim
61 words
An insert assembly for use in the manufacture of an athletic boot, said insert assembly comprising an outer sock-shaped insert element of flexible, elastic and highly porous material capable of being fitted loosely but securely over a last, said insert assembly further comprising a reinforcing insert element of at least one layer of cloth-like material fastened to said outer insert element.
Claim 16
Dependent Claim
19 words
An insert assembly according to claim 13, wherein said reinforcing insert element is tack-stitched to said outer insert element.
Claim 17
Dependent Claim
16 words
An insert assembly according to claim 13, wherein said outer insert element is a polyurethane-nylon material.
Claim 18
Dependent Claim
18 words
An insert assembly according to claim 13, wherein said reinforcing insert element includes first and second cloth-like layers.
Claim 19
Dependent Claim
15 words
An insert assembly according to claim 16, wherein said first layer is a woven polyamide.
Claim 20
Dependent Claim
15 words
An insert assembly according to claim 17, wherein said second layer is a nonwoven polyamide.
Claim 21
Independent Claim
70 words
A method of making an athletic boot, said method comprising the steps of mounting a cloth-like, porous insert assembly upon a foot shaped last, positioning a mold about the last and then injecting a castable rubber-like material into the mold to fill the space between the mold and the last and simultaneously to impregnate and surround the insert to form a strong unitary shell shaped to encase a human foot.
Claim 22
Independent Claim
70 words
A method of making an athletic boot, said method comprising the steps of mounting a cloth-like, porous insert assembly upon a foot shaped last, positioning a mold about the last and then injecting a castable rubber-like material into the mold to fill the space between the mold and the last and simultaneously to impregnate and surround the insert to form a strong unitary shell shaped to encase a human foot.
Claim 23
Dependent Claim
29 words
A method according to claim 19, wherein said insert assembly includes at least one layer of a cloth-like material having a higher elastic modulus than said castable rubber-like material.
Claim 24
Dependent Claim
21 words
A method according to claim 19, wherein said castable rubber-like material is polyurethane and said one layer is a polyamide material.
Claim 25
Dependent Claim
30 words
A method according to claim 20, wherein said insert assembly includes at least two layers of cloth-like material, one of which is woven and the other of which is nonwoven.
Claim 26
Dependent Claim
36 words
A method according to claim 19, wherein said insert assembly includes a highly stretchable portion to which is secured reinforcing layers of cloth-like material and wherein said highly stretchable portion is stretch fitted over said last.
Claim 27
Dependent Claim
62 words
A method according to claim 19, wherein said porous insert assembly comprises an outer highly porous stretchable sock-like member containing therein a porous insert of a higher elastic modulus than said castable rubber-like material and wherein said sock-like member is stretched over said last to hold said porous insert at a predetermined location during the injection of said castable rubber like material.
Claim 28
Dependent Claim
41 words
A method according to claim 24, wherein said sock-like member is sufficiently elastic to allow said porous insert to drift away, slightly from said last during said injection to allow said porous insert to become encapsulated in said castable rubber-like material.
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) | 1979-08-24 | 1980-02-23 | 1980-08-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-08-24 | 1984-02-23 | 1984-08-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-08-24 | 1988-02-23 | 1988-08-24 | $7700.00 | Window Closed / Lapsed |