Patent US3667308A successfully refreshed from Google Patents.
US3667308A
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V-belt
Assignee: Semperit AG Holding
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Filing: 1970-11-23
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Granted: 1972-06-06
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Expires: 1990-11-23
Abstract
Abstract A raw-edged V-belt which is of the type embodying at least a top cover layer, reinforcement insert means, and a substantially trapezoidal-shaped core formed of an elastomer. According to important aspects of the invention, the top cover layer is formed of a fiber fleece or a wide-meshed fabric completely impregnated with an elastomer. If desired, the raw-edged V-belt construction of the invention may further be equipped with a bottom cover layer. The invention further contemplates that one or both cover layers of the V-belt consist of an elastomer of low modulus of elasticity, but higher breaking elongation, than the elastomer of the core.
Inventors
- 👤 Johann Schwab
- 👤 Anna Magritsch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 03:06
CPC Classifications
F; F16; F16G; F16G5/00; F16G5/04; F16G5/06; B; B29; B29D; B29D29/00; B29D29/10; F16G5/16; F16G5/166
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
40 words
A raw-edged V-belt as defined in claim 1, wherein said core contains an elastomer, and wherein the elastomer of said top cover layer possesses a lower modulus of elasticity and a higher breaking elongation than the elastomer of said core.
Claim 2
Dependent Claim
18 words
A raw-edged V-belt as defined in claim 1, further including a bottom cover layer disposed beneath said core.
Claim 3
Dependent Claim
39 words
A raw-edged V-belt as defined in claim 3, wherein said core contains an elastomer, and said bottom cover layer contains an elastomer possessing a lower modulus of elasticity and a higher breaking elongation than the elastomer of said core.
Claim 4
Dependent Claim
36 words
A raw-edged V-belt as defined in claim 3, wherein the modulus of elasticity of the elastomer of said cover layers amounts to less than one-third of the modulus of elasticity of the elastomer of the core.
Claim 5
Dependent Claim
35 words
A raw-edged V-belt as defined in claim 5, wherein the modulus of elasticity of the elastomer of said cover layers amounts to about one-sixth of the modulus of elasticity of the elastomer of the core.
Claim 6
Dependent Claim
32 words
A raw-edged V-belt as defined in claim 5, wherein the breaking elongation of the elastomer of said cover layers is more than twice the breaking elongation of the elastomer of the core.
Claim 7
Dependent Claim
33 words
A raw-edged V-belt as defined in claim 7, wherein said breaking elongation of the elastomer of said cover layers amounts to about four times the breaking elongation of the elastomer of the core.
Claim 8
Dependent Claim
38 words
A raw-edged V-belt as defined in claim 5, wherein the Shore-A-Hardness of the elastomer of said cover layers is in a range of about 10 to about 30 lower than the Shore-A-Hardness of the elastomer of the core.
Claim 9
Dependent Claim
32 words
A raw-edged V-belt as defined in claim 9, wherein the Shore-A-Hardness of the elastomer of said cover layers is preferably about 20 less than the Shore-A-Hardness of the elastomer of the core.
Claim 10
Dependent Claim
18 words
A raw-edged V-belt as defined in claim 1, wherein said fiber fleece is formed of randomly oriented fibers.
Claim 11
Dependent Claim
30 words
A raw-edged V-belt as defined in claim 1, wherein said fiber fleece possesses fibers which are slightly oriented in a direction transverse to the direction of travel of the V-belt.
Claim 12
Dependent Claim
17 words
A raw-edged V-belt as defined in claim 1, wherein said fiber fleece is a polyamide fiber fleece.
Claim 13
Dependent Claim
18 words
A raw-edged V-belt as defined in claim 1, wherein the V-belt contains an elastomer incorporating a sulphur-modified chloroprene.
Claim 14
Dependent Claim
21 words
A raw-edged V-belt as defined in claim 1, further including adhering layers disposed at both sides of said reinforcement insert means.
Claim 15
Dependent Claim
16 words
A raw-edged V-belt as defined in claim 1, wherein said wide-meshed fabric consists of polyamide fibers.
Claim 16
Dependent Claim
17 words
A raw-edged V-belt as defined in claim 1, wherein said fiber fleece is formed of steel wool.
Claim 17
Dependent Claim
17 words
A raw-edged V-belt as defined in claim 1, wherein said fiber fleece is formed of polyurethane fibers.
Claim 18
Dependent Claim
43 words
A raw-edged V-belt comprising at least a top cover layer, reinforcement insert means disposed beneath said top cover layer, and a substantially trapezoidal-shaped core located beneath said reinforcement insert means, said top cover layer being formed of fiber fleece impregnated with an elastomer.
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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) | 1975-06-06 | 1975-12-06 | 1976-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-06 | 1979-12-06 | 1980-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-06 | 1983-12-06 | 1984-06-06 | $7700.00 | Window Closed / Lapsed |