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US3798804A
Expired / Lapsed
US
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Safety shoe
Assignee: DR ING FUNCK & Co KG GmbH
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Filing: 1972-01-18
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Granted: 1974-03-26
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Expires: 1992-01-18
Abstract
Abstract A safety shoe in accordance with the invention includes a steel protective element in or on a tough plastics shell.
Inventors
- 👤 H Funck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 22:04
CPC Classifications
A; A43; A43B; A43B7/00; A43B7/32
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
142 words
In a safety shoe having built-in protective elements, the improvement comprising an outer shell terminating at an upper edge in proximity of the wearer''s ankle, said shell having an aperture providing means for insertion of the wearer''s foot into said shoe and including a tongue opening, a tongue providing means for closing said tongue opening, said shell including an outer sole and an upper formed of an integrally molded, continuous, tough, resilient plastic, which outer shell carries said protective elements, said outer shell including means for permitting said shoe to be bent along the bent line under the ball of the foot, which means comprises slots in opposite sides of the upper of said outer shell proximate to the sides of the ball of the foot, extending from the top edge of said outer shell in the direction of said outer sole.
Claim 2
Dependent Claim
142 words
In a safety shoe having built-in protective elements, the improvement comprising an outer shell terminating at an upper edge in proximity of the wearer''s ankle, said shell having an aperture providing means for insertion of the wearer''s foot into said shoe and including a tongue opening, a tongue providing means for closing said tongue opening, said shell including an outer sole and an upper formed of an integrally molded, continuous, tough, resilient plastic, which outer shell carries said protective elements, said outer shell including means for permitting said shoe to be bent along the bent line under the ball of the foot, which means comprises slots in opposite sides of the upper of said outer shell proximate to the sides of the ball of the foot, extending from the top edge of said outer shell in the direction of said outer sole.
Claim 3
Dependent Claim
17 words
The improved shoe of claim 1 wherein a light inner shoe is disposed in said outer shell.
Claim 4
Dependent Claim
21 words
The improved shoe of claim 2 wherein means for retaining the shoe on the foot are disposed on said outer shell.
Claim 5
Dependent Claim
18 words
The improved shoe of claim 2 wherein the light inner shoe is made separately from the outer shell.
Claim 6
Dependent Claim
15 words
The improved shoe of claim 2 wherein the inner shoe has a light walking sole.
Claim 7
Dependent Claim
42 words
The improved shoe of claim 2 wherein said tongue opening is closed by a curved plate of hard resilient material which also acts as metatarsal bone protection, the protective plate being extended as far as the lateral sole edges to bear thereagainst.
Claim 8
Dependent Claim
29 words
The improved shoe of claim 6, wherein the metatarsal bone protective plate is pivotably mounted on two stub axles extending laterally from the front cap of the outer shell.
Claim 9
Dependent Claim
41 words
The improved shoe of claim 7 wherein the front cap of the outer shell has a steel cap embedded therein and said steel cap has two laterally attached stub axles via which the metatarsal bone protective plate is borne and located.
Claim 10
Dependent Claim
20 words
The improved shoe of claim 8 wherein the stub axles each have a base plate embedded in the outer shell.
Claim 11
Dependent Claim
22 words
The improved shoe of claim 1 wherein a suspension device for a metatarsal bone protection is moulded on to the outer shell.
Claim 12
Dependent Claim
22 words
The improved shoe of claim 1, wherein said slots extend from the top edge of the outer shell to the outer sole.
Claim 13
Dependent Claim
23 words
The improved shoe of claim 1 wherein said slots are closed by a thin flexible skin against the entry of water or dirt.
Claim 14
Dependent Claim
56 words
The improved shoe of claim 12 wherein said thin skin closing said slots is made of the same material as the outer shell, is unitary therewith, and is curved bellows fashion to permit the entry of air into said outer shell and to provide means for forcing air into said shoe when said shoe is bent.
Claim 15
Dependent Claim
37 words
The improved shoe of claim 12, wherein the thin flexible skin closing said slots is made of a resilient, watertight material and is rigidly connected to the inner surfaces of the outer shell in the overlapping zones.
Claim 16
Dependent Claim
25 words
The improved shoe of claim 1 wherein said tongue is moulded unitarily on the rear top edge of the front cap of said outer shell.
Claim 17
Dependent Claim
41 words
The improved shoe of claim 1 wherein a metatarsal bone protective plate is attached to a hinge on the top rear edge of the front cap of the outer shell, one part of the hinge being unitary with the outer shell.
Claim 18
Dependent Claim
22 words
The improved shoe of claim 1 wherein a steel toe cap and a steel protective sole are disposed within said molded plastic.
Claim 19
Dependent Claim
20 words
The improved shoe of claim 17 wherein a steel cap and a steel sole are connected to form a unit.
Claim 20
Dependent Claim
13 words
The improved shoe of claim 1 wherein said plastic is a polyurethane foam.
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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) | 1977-03-25 | 1977-09-24 | 1978-03-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-25 | 1981-09-24 | 1982-03-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-25 | 1985-09-24 | 1986-03-26 | $7700.00 | Window Closed / Lapsed |