Patent US4366630A successfully refreshed from Google Patents.
US4366630A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Foot wear
Assignee: AECI Ltd
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Filing: 1980-12-01
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Granted: 1983-01-04
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Expires: 2000-12-01
Abstract
Abstract The invention concerns a composite sole for use in safety footwear, as well as a combination heel and sole and a complete article of footwear, the composite sole comprising an inner sole of electrically conducting material, and a thin flexible outer sole up to about 8 mm thick of electrically conducting material, said outer sole being spaced from the inner sole and connected thereto at a plurality of positions in an electrically conducting manner. Electrically conducting plastics spacer plugs can be used as the connection between the inner and outer soles.
Inventors
- 👤 Leslie I. Bloom
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:51
CPC Classifications
A; A43; A43B; A43B7/00; A43B7/36
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
77 words
A composite sole for use in safety footwear, said composite sole comprising an inner sole of electrically conducting material, a thin flexible outer sole up to 8 mm thick of electrically conducting material, said outer sole being spaced from the inner sole and connected thereto at a multiple plurality of positions spaced apart over the area of the sole in an electrically conducting manner and a layer resistant to flex cracking between the inner and outer soles.
Claim 2
Dependent Claim
77 words
A composite sole for use in safety footwear, said composite sole comprising an inner sole of electrically conducting material, a thin flexible outer sole up to 8 mm thick of electrically conducting material, said outer sole being spaced from the inner sole and connected thereto at a multiple plurality of positions spaced apart over the area of the sole in an electrically conducting manner and a layer resistant to flex cracking between the inner and outer soles.
Claim 3
Dependent Claim
18 words
A composition as claimed in claim 1, wherein the outer sole is from 2 to 5 mm thick.
Claim 4
Dependent Claim
26 words
A composite sole as claimed in claim 1, wherein the inner and outer soles are connected together by a multiple plurality of electrically conducting spacer plugs.
Claim 5
Dependent Claim
86 words
A combination heel and sole for footwear, said combination comprising an inner sole of electrically conducting material, a thin flexible outer sole up to 8 mm thick of electrically conducting material, said outer sole being attached to the underside of a heel, said inner and outer soles being held apart by and connected in electrically conducting manner by a multiple plurality of electrically conducting plugs spaced apart over the area of the sole and filler material around the plugs and between the inner and outer soles.
Claim 6
Dependent Claim
86 words
A combination heel and sole for footwear, said combination comprising an inner sole of electrically conducting material, a thin flexible outer sole up to 8 mm thick of electrically conducting material, said outer sole being attached to the underside of a heel, said inner and outer soles being held apart by and connected in electrically conducting manner by a multiple plurality of electrically conducting plugs spaced apart over the area of the sole and filler material around the plugs and between the inner and outer soles.
Claim 7
Dependent Claim
18 words
A combination as claimed in claim 4, wherein the outer sole is from 2 to 5 mm thick.
Claim 8
Dependent Claim
28 words
A combination as claimed in claim 4, wherein spacer plugs also form electrical connections between the underside of the heel and a rearward extension of the inner sole.
Claim 9
Dependent Claim
124 words
An article of footwear comprising an upper and a combination heel and sole, said combination comprising an inner sole of electrically conducting material, a thin flexible outer sole up to 8 mm thick of electrically conducting material, said outer sole being attached to the underside of a heel, said inner and outer soles being held apart by and connected in electrically conducting manner by a multiple plurality of electrically conductive plugs spaced apart over the area of the sole, a layer of filler material which is resistant to flex-cracking around the plugs and between the inner and outer soles, and at least one spacer plug also forming an electrical connection between the underside of the heel and a rearward extension of the inner sole.
Claim 10
Dependent Claim
124 words
An article of footwear comprising an upper and a combination heel and sole, said combination comprising an inner sole of electrically conducting material, a thin flexible outer sole up to 8 mm thick of electrically conducting material, said outer sole being attached to the underside of a heel, said inner and outer soles being held apart by and connected in electrically conducting manner by a multiple plurality of electrically conductive plugs spaced apart over the area of the sole, a layer of filler material which is resistant to flex-cracking around the plugs and between the inner and outer soles, and at least one spacer plug also forming an electrical connection between the underside of the heel and a rearward extension of the inner sole.
Claim 11
Dependent Claim
20 words
An article of footwear as claimed in claim 7, wherein the outer sole is from 2 to 5 mm thick.
Claim 12
Independent Claim
94 words
A method of making a combined sole and heel for footwear, which comprises positioning an inner sole of electrically conducting material in a mould, spacing a thin flexible outer sole of electrically conducting material up to 8 mm thick from the inner sole and separated therefrom by a multiple plurality of electrically conducting plugs spaced apart over the area of the sole, and injecting hard-wearing flex-resistant material into the mould between the inner and outer soles and around the plugs while maintaining the plugs in electrically conducting contact with the inner and outer soles.
Claim 13
Independent Claim
94 words
A method of making a combined sole and heel for footwear, which comprises positioning an inner sole of electrically conducting material in a mould, spacing a thin flexible outer sole of electrically conducting material up to 8 mm thick from the inner sole and separated therefrom by a multiple plurality of electrically conducting plugs spaced apart over the area of the sole, and injecting hard-wearing flex-resistant material into the mould between the inner and outer soles and around the plugs while maintaining the plugs in electrically conducting contact with the inner and outer soles.
Claim 14
Dependent Claim
18 words
A method as claimed in claim 7, wherein the outer sole is from 2 to 5 mm thick.
References Cited (Backward Citations)
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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) | 1986-01-03 | 1986-07-05 | 1987-01-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-01-03 | 1990-07-05 | 1991-01-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-01-03 | 1994-07-05 | 1995-01-04 | $7700.00 | Window Closed / Lapsed |