US4031768A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Endless power transmission belt structure
Assignee: Dayco Products LLC
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Filing: 1976-06-18
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Granted: 1977-06-28
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Expires: 1996-06-18
Abstract
Abstract A substantially trapezoidal endless belt structure having reduced coefficient of friction raw-edged non-parallel sides is provided and comprises a tension section, a compression section, and load-carrying means disposed between the sections with each of such sections being made of an elastomeric compound having anti-friction properties which reduce the coefficient of friction of such sides.
Inventors
- 👤 Dewey D. Henderson
- 👤 Jerry W. Rogers
- 👤 Gerald C. Hollaway, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 09:10
CPC Classifications
F; F16; F16G; F16G5/00; F16G5/22; F16G5/12; F16G5/14; F16G5/16; F16G5/166
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
75 words
An endless substantially trapezoidal power transmission belt structure having reduced coefficient of friction raw-edged non-parallel sides comprising, a tension section, a compression section, and load-carrying means disposed between said sections, each of said sections being made of an elastomeric compound comprising a polymer and graphite, said compound having anti-friction properties which reduce the coefficient of friction of said sides, said graphite comprising 15-90 parts by weight for each 100 parts by weight of said polymer.
Claim 2
Dependent Claim
75 words
An endless substantially trapezoidal power transmission belt structure having reduced coefficient of friction raw-edged non-parallel sides comprising, a tension section, a compression section, and load-carrying means disposed between said sections, each of said sections being made of an elastomeric compound comprising a polymer and graphite, said compound having anti-friction properties which reduce the coefficient of friction of said sides, said graphite comprising 15-90 parts by weight for each 100 parts by weight of said polymer.
Claim 3
Dependent Claim
34 words
A belt structure as set forth in claim 1 in which said elastomeric compound is further comprised of roughly 2 parts by weight of stearic acid for each 100 parts by weight of polymer.
Claim 4
Dependent Claim
36 words
A belt structure as set forth in claim 1 in which said elastomeric compound is further comprised of from 10 to 50 parts by weight of strengthening fibers for each 100 parts by weight of polymer.
Claim 5
Dependent Claim
48 words
A belt structure as set forth in claim 3 in which said load-carrying means is comprised of a helically wound load-carrying cord and further comprising a fabric layer defining the inside surface of said belt structure and a fabric layer defining the outside surface of said belt structure.
Claim 6
Dependent Claim
33 words
A belt structure as set forth in claim 3 in which each of said strengthening fibers is disposed substantially transverse the longitudinal axis of said belt structure and increases the transverse stiffness thereof.
Claim 7
Dependent Claim
35 words
A belt structure as set forth in claim 5 in which each of said fibers has a diameter ranging between 0.001 inch and 0.050 inch and a length ranging between 0.001 inch and several inches.
Claim 8
Dependent Claim
24 words
A belt structure as set forth in claim 3 in which said compression section has a plurality of integral teeth defining its outer portion.
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) | 1980-06-27 | 1980-12-27 | 1981-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-06-27 | 1984-12-27 | 1985-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-06-27 | 1988-12-27 | 1989-06-28 | $7700.00 | Window Closed / Lapsed |